26e7aacb83
976 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Mauro Carvalho Chehab
|
7ac3945d8e |
Documentation: KVM: update amd-memory-encryption.rst references
Changeset |
||
Suravee Suthikulpanit
|
bbe3a10658 |
iommu/amd: Add PCI segment support for ivrs_[ioapic/hpet/acpihid] commands
By default, PCI segment is zero and can be omitted. To support system with non-zero PCI segment ID, modify the parsing functions to allow PCI segment ID. Co-developed-by: Vasant Hegde <vasant.hegde@amd.com> Signed-off-by: Vasant Hegde <vasant.hegde@amd.com> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Link: https://lore.kernel.org/r/20220706113825.25582-33-vasant.hegde@amd.com Signed-off-by: Joerg Roedel <jroedel@suse.de> |
||
Muchun Song
|
6636109512 |
mm: memory_hotplug: make hugetlb_optimize_vmemmap compatible with memmap_on_memory
For now, the feature of hugetlb_free_vmemmap is not compatible with the feature of memory_hotplug.memmap_on_memory, and hugetlb_free_vmemmap takes precedence over memory_hotplug.memmap_on_memory. However, someone wants to make memory_hotplug.memmap_on_memory takes precedence over hugetlb_free_vmemmap since memmap_on_memory makes it more likely to succeed memory hotplug in close-to-OOM situations. So the decision of making hugetlb_free_vmemmap take precedence is not wise and elegant. The proper approach is to have hugetlb_vmemmap.c do the check whether the section which the HugeTLB pages belong to can be optimized. If the section's vmemmap pages are allocated from the added memory block itself, hugetlb_free_vmemmap should refuse to optimize the vmemmap, otherwise, do the optimization. Then both kernel parameters are compatible. So this patch introduces VmemmapSelfHosted to mask any non-optimizable vmemmap pages. The hugetlb_vmemmap can use this flag to detect if a vmemmap page can be optimized. [songmuchun@bytedance.com: walk vmemmap page tables to avoid false-positive] Link: https://lkml.kernel.org/r/20220620110616.12056-3-songmuchun@bytedance.com Link: https://lkml.kernel.org/r/20220617135650.74901-3-songmuchun@bytedance.com Signed-off-by: Muchun Song <songmuchun@bytedance.com> Co-developed-by: Oscar Salvador <osalvador@suse.de> Signed-off-by: Oscar Salvador <osalvador@suse.de> Acked-by: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Paul E. McKenney <paulmck@kernel.org> Cc: Xiongchun Duan <duanxiongchun@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
Marc Zyngier
|
504ee23611 |
arm64: Add the arm64.nosve command line option
In order to be able to completely disable SVE even if the HW seems to support it (most likely because the FW is broken), move the SVE setup into the EL2 finalisation block, and use a new idreg override to deal with it. Note that we also nuke id_aa64zfr0_el1 as a byproduct, and that SME also gets disabled, due to the dependency between the two features. Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20220630160500.1536744-9-maz@kernel.org Signed-off-by: Will Deacon <will@kernel.org> |
||
|
Marc Zyngier
|
b3000e2133 |
arm64: Add the arm64.nosme command line option
In order to be able to completely disable SME even if the HW seems to support it (most likely because the FW is broken), move the SME setup into the EL2 finalisation block, and use a new idreg override to deal with it. Note that we also nuke id_aa64smfr0_el1 as a byproduct. Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20220630160500.1536744-8-maz@kernel.org Signed-off-by: Will Deacon <will@kernel.org> |
||
Christophe Leroy
|
56e54b4e6c |
powerpc/32: Remove 'noltlbs' kernel parameter
Mapping without large TLBs has no added value on the 8xx. Mapping without large TLBs is still necessary on 40x when selecting CONFIG_KFENCE or CONFIG_DEBUG_PAGEALLOC or CONFIG_STRICT_KERNEL_RWX, but this is done automatically and doesn't require user selection. Remove 'noltlbs' kernel parameter, the user has no reason to use it. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/80ca17bd39cf608a8ebd0764d7064a498e131199.1655202721.git.christophe.leroy@csgroup.eu |
||
|
Christophe Leroy
|
1ce844973b |
powerpc/32: Remove the 'nobats' kernel parameter
Mapping without BATs doesn't bring any added value to the user. Remove that option. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/6977314c823cfb728bc0273cea634b41807bfb64.1655202721.git.christophe.leroy@csgroup.eu |
||
Liu Song
|
e92b25731e |
arm64: correct the effect of mitigations off on kpti
If KASLR is enabled, then kpti will be forced to be enabled even if mitigations off, so we need to adjust the description of this parameter. Signed-off-by: Liu Song <liusong@linux.alibaba.com> Link: https://lore.kernel.org/r/1656033648-84181-1-git-send-email-liusong@linux.alibaba.com Signed-off-by: Will Deacon <will@kernel.org> |
||
Mike Rapoport
|
ee65728e10 |
docs: rename Documentation/vm to Documentation/mm
so it will be consistent with code mm directory and with Documentation/admin-guide/mm and won't be confused with virtual machines. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Suggested-by: Matthew Wilcox <willy@infradead.org> Tested-by: Ira Weiny <ira.weiny@intel.com> Acked-by: Jonathan Corbet <corbet@lwn.net> Acked-by: Wu XiangCheng <bobwxc@email.cn> |
||
Peter Zijlstra
|
3ebc170068 |
x86/bugs: Add retbleed=ibpb
jmp2ret mitigates the easy-to-attack case at relatively low overhead. It mitigates the long speculation windows after a mispredicted RET, but it does not mitigate the short speculation window from arbitrary instruction boundaries. On Zen2, there is a chicken bit which needs setting, which mitigates "arbitrary instruction boundaries" down to just "basic block boundaries". But there is no fix for the short speculation window on basic block boundaries, other than to flush the entire BTB to evict all attacker predictions. On the spectrum of "fast & blurry" -> "safe", there is (on top of STIBP or no-SMT): 1) Nothing System wide open 2) jmp2ret May stop a script kiddy 3) jmp2ret+chickenbit Raises the bar rather further 4) IBPB Only thing which can count as "safe". Tentative numbers put IBPB-on-entry at a 2.5x hit on Zen2, and a 10x hit on Zen1 according to lmbench. [ bp: Fixup feature bit comments, document option, 32-bit build fix. ] Suggested-by: Andrew Cooper <Andrew.Cooper3@citrix.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de> |
||
Pawan Gupta
|
7c693f54c8 |
x86/speculation: Add spectre_v2=ibrs option to support Kernel IBRS
Extend spectre_v2= boot option with Kernel IBRS. [jpoimboe: no STIBP with IBRS] Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de> |
||
Kim Phillips
|
e8ec1b6e08 |
x86/bugs: Enable STIBP for JMP2RET
For untrained return thunks to be fully effective, STIBP must be enabled or SMT disabled. Co-developed-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Kim Phillips <kim.phillips@amd.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> |
||
Alexandre Chartre
|
7fbf47c7ce |
x86/bugs: Add AMD retbleed= boot parameter
Add the "retbleed=<value>" boot parameter to select a mitigation for RETBleed. Possible values are "off", "auto" and "unret" (JMP2RET mitigation). The default value is "auto". Currently, "retbleed=auto" will select the unret mitigation on AMD and Hygon and no mitigation on Intel (JMP2RET is not effective on Intel). [peterz: rebase; add hygon] [jpoimboe: cleanups] Signed-off-by: Alexandre Chartre <alexandre.chartre@oracle.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de> |
||
David Matlack
|
ada51a9de7 |
KVM: x86/mmu: Extend Eager Page Splitting to nested MMUs
Add support for Eager Page Splitting pages that are mapped by nested
MMUs. Walk through the rmap first splitting all 1GiB pages to 2MiB
pages, and then splitting all 2MiB pages to 4KiB pages.
Note, Eager Page Splitting is limited to nested MMUs as a policy rather
than due to any technical reason (the sp->role.guest_mode check could
just be deleted and Eager Page Splitting would work correctly for all
shadow MMU pages). There is really no reason to support Eager Page
Splitting for tdp_mmu=N, since such support will eventually be phased
out, and there is no current use case supporting Eager Page Splitting on
hosts where TDP is either disabled or unavailable in hardware.
Furthermore, future improvements to nested MMU scalability may diverge
the code from the legacy shadow paging implementation. These
improvements will be simpler to make if Eager Page Splitting does not
have to worry about legacy shadow paging.
Splitting huge pages mapped by nested MMUs requires dealing with some
extra complexity beyond that of the TDP MMU:
(1) The shadow MMU has a limit on the number of shadow pages that are
allowed to be allocated. So, as a policy, Eager Page Splitting
refuses to split if there are KVM_MIN_FREE_MMU_PAGES or fewer
pages available.
(2) Splitting a huge page may end up re-using an existing lower level
shadow page tables. This is unlike the TDP MMU which always allocates
new shadow page tables when splitting.
(3) When installing the lower level SPTEs, they must be added to the
rmap which may require allocating additional pte_list_desc structs.
Case (2) is especially interesting since it may require a TLB flush,
unlike the TDP MMU which can fully split huge pages without any TLB
flushes. Specifically, an existing lower level page table may point to
even lower level page tables that are not fully populated, effectively
unmapping a portion of the huge page, which requires a flush. As of
this commit, a flush is always done always after dropping the huge page
and before installing the lower level page table.
This TLB flush could instead be delayed until the MMU lock is about to be
dropped, which would batch flushes for multiple splits. However these
flushes should be rare in practice (a huge page must be aliased in
multiple SPTEs and have been split for NX Huge Pages in only some of
them). Flushing immediately is simpler to plumb and also reduces the
chances of tripping over a CPU bug (e.g. see iTLB multihit).
[ This commit is based off of the original implementation of Eager Page
Splitting from Peter in Google's kernel from 2016. ]
Suggested-by: Peter Feiner <pfeiner@google.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20220516232138.1783324-23-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
|
||
Paul E. McKenney
|
89f7f29140 |
doc: Document rcutree.nocb_nobypass_lim_per_jiffy kernel parameter
This commit provides documentation for the kernel parameter controlling RCU's handling of callback floods on offloaded (rcu_nocbs) CPUs. This parameter might be obscure, but it is always there when you need it. Reported-by: Frederic Weisbecker <frederic@kernel.org> Reported-by: Uladzislau Rezki <urezki@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Reviewed-by: Neeraj Upadhyay <quic_neeraju@quicinc.com> |
||
|
Paul E. McKenney
|
71de1e34f1 |
doc: Document the rcutree.rcu_divisor kernel boot parameter
This commit adds kernel-parameters.txt documentation for the rcutree.rcu_divisor kernel boot parameter, which controls the softirq callback-invocation batch limit. Cc: Eric Dumazet <edumazet@google.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Reviewed-by: Neeraj Upadhyay <quic_neeraju@quicinc.com> |
||
Linus Torvalds
|
24625f7d91 |
ARM64:
* Properly reset the SVE/SME flags on vcpu load
* Fix a vgic-v2 regression regarding accessing the pending
state of a HW interrupt from userspace (and make the code
common with vgic-v3)
* Fix access to the idreg range for protected guests
* Ignore 'kvm-arm.mode=protected' when using VHE
* Return an error from kvm_arch_init_vm() on allocation failure
* A bunch of small cleanups (comments, annotations, indentation)
RISC-V:
* Typo fix in arch/riscv/kvm/vmid.c
* Remove broken reference pattern from MAINTAINERS entry
x86-64:
* Fix error in page tables with MKTME enabled
* Dirty page tracking performance test extended to running a nested
guest
* Disable APICv/AVIC in cases that it cannot implement correctly
-----BEGIN PGP SIGNATURE-----
iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmKjTIAUHHBib256aW5p
QHJlZGhhdC5jb20ACgkQv/vSX3jHroNhPQgAiIVtp8aepujUM/NhkNyK3SIdLzlS
oZCZiS6bvaecKXi/QvhBU0EBxAEyrovk3lmVuYNd41xI+PDjyaA4SDIl5DnToGUw
bVPNFSYqjpF939vUUKjc0RCdZR4o5g3Od3tvWoHTHviS1a8aAe5o9pcpHpD0D6Mp
Gc/o58nKAOPl3htcFKmjymqo3Y6yvkJU9NB7DCbL8T5mp5pJ959Mw1/LlmBaAzJC
OofrynUm4NjMyAj/mAB1FhHKFyQfjBXLhiVlS0SLiiEA/tn9/OXyVFMKG+n5VkAZ
Q337GMFe2RikEIuMEr3Rc4qbZK3PpxHhaj+6MPRuM0ho/P4yzl2Nyb/OhA==
=h81Q
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"While last week's pull request contained miscellaneous fixes for x86,
this one covers other architectures, selftests changes, and a bigger
series for APIC virtualization bugs that were discovered during 5.20
development. The idea is to base 5.20 development for KVM on top of
this tag.
ARM64:
- Properly reset the SVE/SME flags on vcpu load
- Fix a vgic-v2 regression regarding accessing the pending state of a
HW interrupt from userspace (and make the code common with vgic-v3)
- Fix access to the idreg range for protected guests
- Ignore 'kvm-arm.mode=protected' when using VHE
- Return an error from kvm_arch_init_vm() on allocation failure
- A bunch of small cleanups (comments, annotations, indentation)
RISC-V:
- Typo fix in arch/riscv/kvm/vmid.c
- Remove broken reference pattern from MAINTAINERS entry
x86-64:
- Fix error in page tables with MKTME enabled
- Dirty page tracking performance test extended to running a nested
guest
- Disable APICv/AVIC in cases that it cannot implement correctly"
[ This merge also fixes a misplaced end parenthesis bug introduced in
commit
|
||
|
Linus Torvalds
|
8e8afafb0b |
Yet another hw vulnerability with a software mitigation: Processor MMIO
Stale Data. They are a class of MMIO-related weaknesses which can expose stale data by propagating it into core fill buffers. Data which can then be leaked using the usual speculative execution methods. Mitigations include this set along with microcode updates and are similar to MDS and TAA vulnerabilities: VERW now clears those buffers too. -----BEGIN PGP SIGNATURE----- iQJGBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAmKXMkMTHHRnbHhAbGlu dXRyb25peC5kZQAKCRCmGPVMDXSYoWGPD/idalLIhhV5F2+hZIKm0WSnsBxAOh9K 7y8xBxpQQ5FUfW3vm7Pg3ro6VJp7w2CzKoD4lGXzGHriusn3qst3vkza9Ay8xu8g RDwKe6hI+p+Il9BV9op3f8FiRLP9bcPMMReW/mRyYsOnJe59hVNwRAL8OG40PY4k hZgg4Psfvfx8bwiye5efjMSe4fXV7BUCkr601+8kVJoiaoszkux9mqP+cnnB5P3H zW1d1jx7d6eV1Y063h7WgiNqQRYv0bROZP5BJkufIoOHUXDpd65IRF3bDnCIvSEz KkMYJNXb3qh7EQeHS53NL+gz2EBQt+Tq1VH256qn6i3mcHs85HvC68gVrAkfVHJE QLJE3MoXWOqw+mhwzCRrEXN9O1lT/PqDWw8I4M/5KtGG/KnJs+bygmfKBbKjIVg4 2yQWfMmOgQsw3GWCRjgEli7aYbDJQjany0K/qZTq54I41gu+TV8YMccaWcXgDKrm cXFGUfOg4gBm4IRjJ/RJn+mUv6u+/3sLVqsaFTs9aiib1dpBSSUuMGBh548Ft7g2 5VbFVSDaLjB2BdlcG7enlsmtzw0ltNssmqg7jTK/L7XNVnvxwUoXw+zP7RmCLEYt UV4FHXraMKNt2ZketlomC8ui2hg73ylUp4pPdMXCp7PIXp9sVamRTbpz12h689VJ /s55bWxHkR6S =LBxT -----END PGP SIGNATURE----- Merge tag 'x86-bugs-2022-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 MMIO stale data fixes from Thomas Gleixner: "Yet another hw vulnerability with a software mitigation: Processor MMIO Stale Data. They are a class of MMIO-related weaknesses which can expose stale data by propagating it into core fill buffers. Data which can then be leaked using the usual speculative execution methods. Mitigations include this set along with microcode updates and are similar to MDS and TAA vulnerabilities: VERW now clears those buffers too" * tag 'x86-bugs-2022-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/speculation/mmio: Print SMT warning KVM: x86/speculation: Disable Fill buffer clear within guests x86/speculation/mmio: Reuse SRBDS mitigation for SBDS x86/speculation/srbds: Update SRBDS mitigation selection x86/speculation/mmio: Add sysfs reporting for Processor MMIO Stale Data x86/speculation/mmio: Enable CPU Fill buffer clearing on idle x86/bugs: Group MDS, TAA & Processor MMIO Stale Data mitigations x86/speculation/mmio: Add mitigation for Processor MMIO Stale Data x86/speculation: Add a common function for MD_CLEAR mitigation update x86/speculation/mmio: Enumerate Processor MMIO Stale Data bug Documentation: Add documentation for Processor MMIO Stale Data |
||
Randy Dunlap
|
8d6d51edcb |
docs: selinux: add '=' signs to kernel boot options
Provide the full kernel boot option string (with ending '=' sign).
They won't work without that and that is how other boot options are
listed.
If used without an '=' sign (as listed here), they cause an "Unknown
parameters" message and are added to init's argument strings,
polluting them.
Unknown kernel command line parameters "enforcing checkreqprot
BOOT_IMAGE=/boot/bzImage-517rc6", will be passed to user space.
Run /sbin/init as init process
with arguments:
/sbin/init
enforcing
checkreqprot
with environment:
HOME=/
TERM=linux
BOOT_IMAGE=/boot/bzImage-517rc6
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Paul Moore <paul@paul-moore.com>
Cc: Stephen Smalley <stephen.smalley.work@gmail.com>
Cc: Eric Paris <eparis@parisplace.org>
Cc: selinux@vger.kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
[PM: removed bogus 'Fixes' line]
Signed-off-by: Paul Moore <paul@paul-moore.com>
|
||
Will Deacon
|
cde5042adf |
KVM: arm64: Ignore 'kvm-arm.mode=protected' when using VHE
Ignore 'kvm-arm.mode=protected' when using VHE so that kvm_get_mode() only returns KVM_MODE_PROTECTED on systems where the feature is available. Cc: David Brazdil <dbrazdil@google.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20220609121223.2551-4-will@kernel.org |
||
|
Linus Torvalds
|
500a434fc5 |
Driver core changes for 5.19-rc1
Here is the set of driver core changes for 5.19-rc1.
Note, I'm not really happy with this pull request as-is, see below for
details, but overall this is all good for everything but a small set of
systems, which we have a fix for already.
Lots of tiny driver core changes and cleanups happened this cycle,
but the two major things were:
- firmware_loader reorganization and additions including the
ability to have XZ compressed firmware images and the ability
for userspace to initiate the firmware load when it needs to,
instead of being always initiated by the kernel. FPGA devices
specifically want this ability to have their firmware changed
over the lifetime of the system boot, and this allows them to
work without having to come up with yet-another-custom-uapi
interface for loading firmware for them.
- physical location support added to sysfs so that devices that
know this information, can tell userspace where they are
located in a common way. Some ACPI devices already support
this today, and more bus types should support this in the
future.
Smaller changes included:
- driver_override api cleanups and fixes
- error path cleanups and fixes
- get_abi script fixes
- deferred probe timeout changes.
It's that last change that I'm the most worried about. It has been
reported to cause boot problems for a number of systems, and I have a
tested patch series that resolves this issue. But I didn't get it
merged into my tree before 5.18-final came out, so it has not gotten any
linux-next testing.
I'll send the fixup patches (there are 2) as a follow-on series to this
pull request if you want to take them directly, _OR_ I can just revert
the probe timeout changes and they can wait for the next -rc1 merge
cycle. Given that the fixes are tested, and pretty simple, I'm leaning
toward that choice. Sorry this all came at the end of the merge window,
I should have resolved this all 2 weeks ago, that's my fault as it was
in the middle of some travel for me.
All have been tested in linux-next for weeks, with no reported issues
other than the above-mentioned boot time outs.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCYpnv/A8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+yk/fACgvmenbo5HipqyHnOmTQlT50xQ9EYAn2eTq6ai
GkjLXBGNWOPBa5cU52qf
=yEi/
-----END PGP SIGNATURE-----
Merge tag 'driver-core-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH:
"Here is the set of driver core changes for 5.19-rc1.
Lots of tiny driver core changes and cleanups happened this cycle, but
the two major things are:
- firmware_loader reorganization and additions including the ability
to have XZ compressed firmware images and the ability for userspace
to initiate the firmware load when it needs to, instead of being
always initiated by the kernel. FPGA devices specifically want this
ability to have their firmware changed over the lifetime of the
system boot, and this allows them to work without having to come up
with yet-another-custom-uapi interface for loading firmware for
them.
- physical location support added to sysfs so that devices that know
this information, can tell userspace where they are located in a
common way. Some ACPI devices already support this today, and more
bus types should support this in the future.
Smaller changes include:
- driver_override api cleanups and fixes
- error path cleanups and fixes
- get_abi script fixes
- deferred probe timeout changes.
It's that last change that I'm the most worried about. It has been
reported to cause boot problems for a number of systems, and I have a
tested patch series that resolves this issue. But I didn't get it
merged into my tree before 5.18-final came out, so it has not gotten
any linux-next testing.
I'll send the fixup patches (there are 2) as a follow-on series to this
pull request.
All have been tested in linux-next for weeks, with no reported issues
other than the above-mentioned boot time-outs"
* tag 'driver-core-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (55 commits)
driver core: fix deadlock in __device_attach
kernfs: Separate kernfs_pr_cont_buf and rename_lock.
topology: Remove unused cpu_cluster_mask()
driver core: Extend deferred probe timeout on driver registration
MAINTAINERS: add Russ Weight as a firmware loader maintainer
driver: base: fix UAF when driver_attach failed
test_firmware: fix end of loop test in upload_read_show()
driver core: location: Add "back" as a possible output for panel
driver core: location: Free struct acpi_pld_info *pld
driver core: Add "*" wildcard support to driver_async_probe cmdline param
driver core: location: Check for allocations failure
arch_topology: Trace the update thermal pressure
kernfs: Rename kernfs_put_open_node to kernfs_unlink_open_file.
export: fix string handling of namespace in EXPORT_SYMBOL_NS
rpmsg: use local 'dev' variable
rpmsg: Fix calling device_lock() on non-initialized device
firmware_loader: describe 'module' parameter of firmware_upload_register()
firmware_loader: Move definitions from sysfs_upload.h to sysfs.h
firmware_loader: Fix configs for sysfs split
selftests: firmware: Add firmware upload selftests
...
|
||
|
Linus Torvalds
|
3cc30140db |
pci-v5.19-changes
-----BEGIN PGP SIGNATURE-----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=hEti
-----END PGP SIGNATURE-----
Merge tag 'pci-v5.19-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull pci updates from Bjorn Helgaas:
"Resource management:
- Restrict E820 clipping to PCI host bridge windows (Bjorn Helgaas)
- Log E820 clipping better (Bjorn Helgaas)
- Add kernel cmdline options to enable/disable E820 clipping (Hans de
Goede)
- Disable E820 reserved region clipping for IdeaPads, Yoga, Yoga
Slip, Acer Spin 5, Clevo Barebone systems where clipping leaves no
usable address space for touchpads, Thunderbolt devices, etc (Hans
de Goede)
- Disable E820 clipping by default starting in 2023 (Hans de Goede)
PCI device hotplug:
- Include files to remove implicit dependencies (Christophe Leroy)
- Only put Root Ports in D3 if they can signal and wake from D3 so
AMD Yellow Carp doesn't miss hotplug events (Mario Limonciello)
Power management:
- Define pci_restore_standard_config() only for CONFIG_PM_SLEEP since
it's unused otherwise (Krzysztof Kozlowski)
- Power up devices completely, including anything platform firmware
needs to do, during runtime resume (Rafael J. Wysocki)
- Move pci_resume_bus() to PM callbacks so we observe the required
bridge power-up delays (Rafael J. Wysocki)
- Drop unneeded runtime_d3cold device flag (Rafael J. Wysocki)
- Split pci_raw_set_power_state() between pci_power_up() and a new
pci_set_low_power_state() (Rafael J. Wysocki)
- Set current_state to D3cold if config read returns ~0, indicating
the device is not accessible (Rafael J. Wysocki)
- Do not call pci_update_current_state() from pci_power_up() so BARs
and ASPM config are restored correctly (Rafael J. Wysocki)
- Write 0 to PMCSR in pci_power_up() in all cases (Rafael J. Wysocki)
- Split pci_power_up() to pci_set_full_power_state() to avoid some
redundant operations (Rafael J. Wysocki)
- Skip restoring BARs if device is not in D0 (Rafael J. Wysocki)
- Rearrange and clarify pci_set_power_state() (Rafael J. Wysocki)
- Remove redundant BAR restores from pci_pm_thaw_noirq() (Rafael J.
Wysocki)
Virtualization:
- Acquire device lock before config space access lock to avoid AB/BA
deadlock with sriov_numvfs_store() (Yicong Yang)
Error handling:
- Clear MULTI_ERR_COR/UNCOR_RCV bits, which a race could previously
leave permanently set (Kuppuswamy Sathyanarayanan)
Peer-to-peer DMA:
- Whitelist Intel Skylake-E Root Ports regardless of which devfn they
are (Shlomo Pongratz)
ASPM:
- Override L1 acceptable latency advertised by Intel DG2 so ASPM L1
can be enabled (Mika Westerberg)
Cadence PCIe controller driver:
- Set up device-specific register to allow PTM Responder to be
enabled by the normal architected bit (Christian Gmeiner)
- Override advertised FLR support since the controller doesn't
implement FLR correctly (Parshuram Thombare)
Cadence PCIe endpoint driver:
- Correct bitmap size for the ob_region_map of outbound window usage
(Dan Carpenter)
Freescale i.MX6 PCIe controller driver:
- Fix PERST# assertion/deassertion so we observe the required delays
before accessing device (Francesco Dolcini)
Freescale Layerscape PCIe controller driver:
- Add "big-endian" DT property (Hou Zhiqiang)
- Update SCFG DT property (Hou Zhiqiang)
- Add "aer", "pme", "intr" DT properties (Li Yang)
- Add DT compatible strings for ls1028a (Xiaowei Bao)
Intel VMD host bridge driver:
- Assign VMD IRQ domain before enumeration to avoid IOMMU interrupt
remapping errors when MSI-X remapping is disabled (Nirmal Patel)
- Revert VMD workaround that kept MSI-X remapping enabled when IOMMU
remapping was enabled (Nirmal Patel)
Marvell MVEBU PCIe controller driver:
- Add of_pci_get_slot_power_limit() to parse the
'slot-power-limit-milliwatt' DT property (Pali Rohár)
- Add mvebu support for sending Set_Slot_Power_Limit message (Pali
Rohár)
MediaTek PCIe controller driver:
- Fix refcount leak in mtk_pcie_subsys_powerup() (Miaoqian Lin)
MediaTek PCIe Gen3 controller driver:
- Reset PHY and MAC at probe time (AngeloGioacchino Del Regno)
Microchip PolarFlare PCIe controller driver:
- Add chained_irq_enter()/chained_irq_exit() calls to mc_handle_msi()
and mc_handle_intx() to avoid lost interrupts (Conor Dooley)
- Fix interrupt handling race (Daire McNamara)
NVIDIA Tegra194 PCIe controller driver:
- Drop tegra194 MSI register save/restore, which is unnecessary since
the DWC core does it (Jisheng Zhang)
Qualcomm PCIe controller driver:
- Add SM8150 SoC DT binding and support (Bhupesh Sharma)
- Fix pipe clock imbalance (Johan Hovold)
- Fix runtime PM imbalance on probe errors (Johan Hovold)
- Fix PHY init imbalance on probe errors (Johan Hovold)
- Convert DT binding to YAML (Dmitry Baryshkov)
- Update DT binding to show that resets aren't required for
MSM8996/APQ8096 platforms (Dmitry Baryshkov)
- Add explicit register names per chipset in DT binding (Dmitry
Baryshkov)
- Add sc7280-specific clock and reset definitions to DT binding
(Dmitry Baryshkov)
Rockchip PCIe controller driver:
- Fix bitmap size when searching for free outbound region (Dan
Carpenter)
Rockchip DesignWare PCIe controller driver:
- Remove "snps,dw-pcie" from rockchip-dwc DT "compatible" property
because it's not fully compatible with rockchip (Peter Geis)
- Reset rockchip-dwc controller at probe (Peter Geis)
- Add rockchip-dwc INTx support (Peter Geis)
Synopsys DesignWare PCIe controller driver:
- Return error instead of success if DMA mapping of MSI area fails
(Jiantao Zhang)
Miscellaneous:
- Change pci_set_dma_mask() documentation references to
dma_set_mask() (Alex Williamson)"
* tag 'pci-v5.19-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (64 commits)
dt-bindings: PCI: qcom: Add schema for sc7280 chipset
dt-bindings: PCI: qcom: Specify reg-names explicitly
dt-bindings: PCI: qcom: Do not require resets on msm8996 platforms
dt-bindings: PCI: qcom: Convert to YAML
PCI: qcom: Fix unbalanced PHY init on probe errors
PCI: qcom: Fix runtime PM imbalance on probe errors
PCI: qcom: Fix pipe clock imbalance
PCI: qcom: Add SM8150 SoC support
dt-bindings: pci: qcom: Document PCIe bindings for SM8150 SoC
x86/PCI: Disable E820 reserved region clipping starting in 2023
x86/PCI: Disable E820 reserved region clipping via quirks
x86/PCI: Add kernel cmdline options to use/ignore E820 reserved regions
PCI: microchip: Fix potential race in interrupt handling
PCI/AER: Clear MULTI_ERR_COR/UNCOR_RCV bits
PCI: cadence: Clear FLR in device capabilities register
PCI: cadence: Allow PTM Responder to be enabled
PCI: vmd: Revert
|
||
|
Linus Torvalds
|
98931dd95f |
Yang Shi has improved the behaviour of khugepaged collapsing of readonly
file-backed transparent hugepages.
Johannes Weiner has arranged for zswap memory use to be tracked and
managed on a per-cgroup basis.
Munchun Song adds a /proc knob ("hugetlb_optimize_vmemmap") for runtime
enablement of the recent huge page vmemmap optimization feature.
Baolin Wang contributes a series to fix some issues around hugetlb
pagetable invalidation.
Zhenwei Pi has fixed some interactions between hwpoisoned pages and
virtualization.
Tong Tiangen has enabled the use of the presently x86-only
page_table_check debugging feature on arm64 and riscv.
David Vernet has done some fixup work on the memcg selftests.
Peter Xu has taught userfaultfd to handle write protection faults against
shmem- and hugetlbfs-backed files.
More DAMON development from SeongJae Park - adding online tuning of the
feature and support for monitoring of fixed virtual address ranges. Also
easier discovery of which monitoring operations are available.
Nadav Amit has done some optimization of TLB flushing during mprotect().
Neil Brown continues to labor away at improving our swap-over-NFS support.
David Hildenbrand has some fixes to anon page COWing versus
get_user_pages().
Peng Liu fixed some errors in the core hugetlb code.
Joao Martins has reduced the amount of memory consumed by device-dax's
compound devmaps.
Some cleanups of the arch-specific pagemap code from Anshuman Khandual.
Muchun Song has found and fixed some errors in the TLB flushing of
transparent hugepages.
Roman Gushchin has done more work on the memcg selftests.
And, of course, many smaller fixes and cleanups. Notably, the customary
million cleanup serieses from Miaohe Lin.
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCYo52xQAKCRDdBJ7gKXxA
jtJFAQD238KoeI9z5SkPMaeBRYSRQmNll85mxs25KapcEgWgGQD9FAb7DJkqsIVk
PzE+d9hEfirUGdL6cujatwJ6ejYR8Q8=
=nFe6
-----END PGP SIGNATURE-----
Merge tag 'mm-stable-2022-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
"Almost all of MM here. A few things are still getting finished off,
reviewed, etc.
- Yang Shi has improved the behaviour of khugepaged collapsing of
readonly file-backed transparent hugepages.
- Johannes Weiner has arranged for zswap memory use to be tracked and
managed on a per-cgroup basis.
- Munchun Song adds a /proc knob ("hugetlb_optimize_vmemmap") for
runtime enablement of the recent huge page vmemmap optimization
feature.
- Baolin Wang contributes a series to fix some issues around hugetlb
pagetable invalidation.
- Zhenwei Pi has fixed some interactions between hwpoisoned pages and
virtualization.
- Tong Tiangen has enabled the use of the presently x86-only
page_table_check debugging feature on arm64 and riscv.
- David Vernet has done some fixup work on the memcg selftests.
- Peter Xu has taught userfaultfd to handle write protection faults
against shmem- and hugetlbfs-backed files.
- More DAMON development from SeongJae Park - adding online tuning of
the feature and support for monitoring of fixed virtual address
ranges. Also easier discovery of which monitoring operations are
available.
- Nadav Amit has done some optimization of TLB flushing during
mprotect().
- Neil Brown continues to labor away at improving our swap-over-NFS
support.
- David Hildenbrand has some fixes to anon page COWing versus
get_user_pages().
- Peng Liu fixed some errors in the core hugetlb code.
- Joao Martins has reduced the amount of memory consumed by
device-dax's compound devmaps.
- Some cleanups of the arch-specific pagemap code from Anshuman
Khandual.
- Muchun Song has found and fixed some errors in the TLB flushing of
transparent hugepages.
- Roman Gushchin has done more work on the memcg selftests.
... and, of course, many smaller fixes and cleanups. Notably, the
customary million cleanup serieses from Miaohe Lin"
* tag 'mm-stable-2022-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (381 commits)
mm: kfence: use PAGE_ALIGNED helper
selftests: vm: add the "settings" file with timeout variable
selftests: vm: add "test_hmm.sh" to TEST_FILES
selftests: vm: check numa_available() before operating "merge_across_nodes" in ksm_tests
selftests: vm: add migration to the .gitignore
selftests/vm/pkeys: fix typo in comment
ksm: fix typo in comment
selftests: vm: add process_mrelease tests
Revert "mm/vmscan: never demote for memcg reclaim"
mm/kfence: print disabling or re-enabling message
include/trace/events/percpu.h: cleanup for "percpu: improve percpu_alloc_percpu event trace"
include/trace/events/mmflags.h: cleanup for "tracing: incorrect gfp_t conversion"
mm: fix a potential infinite loop in start_isolate_page_range()
MAINTAINERS: add Muchun as co-maintainer for HugeTLB
zram: fix Kconfig dependency warning
mm/shmem: fix shmem folio swapoff hang
cgroup: fix an error handling path in alloc_pagecache_max_30M()
mm: damon: use HPAGE_PMD_SIZE
tracing: incorrect isolate_mote_t cast in mm_vmscan_lru_isolate
nodemask.h: fix compilation error with GCC12
...
|
||
|
Linus Torvalds
|
88a618920e |
It was a moderately busy cycle for documentation; highlights include:
- After a long period of inactivity, the Japanese translations are seeing
some much-needed maintenance and updating.
- Reworked IOMMU documentation
- Some new documentation for static-analysis tools
- A new overall structure for the memory-management documentation. This
is an LSFMM outcome that, it is hoped, will help encourage developers to
fill in the many gaps. Optimism is eternal...but hopefully it will
work.
- More Chinese translations.
Plus the usual typo fixes, updates, etc.
-----BEGIN PGP SIGNATURE-----
iQFDBAABCAAtFiEEIw+MvkEiF49krdp9F0NaE2wMflgFAmKLqZQPHGNvcmJldEBs
d24ubmV0AAoJEBdDWhNsDH5YdgQH/2/9+EgQDes93f/+iKtbO23EV67392dwrmXS
kYg8lR4948/Q3jzgMloUo6hNOoxXeV/sqmdHu0LjUhFN+BGsp9fFjd/jp0XhWcqA
nnc9foGbpmeFPxHeAg2aqV84eeasLoO5lUUm2rNoPBLd6HFV+IYC5R4VZ+w42StB
5bYEOYwHXMvQZXkivZDse82YmvQK3/2rRGTUoFhME/Aap6rFgWJJ+XQcSKA7WmwW
OpJqq+FOsjsxHe6IFVy6onzlqgGJM8zM2bLtqedid6yaE3uACcHMb/OyAjp0rdKF
BQvaG+d3f7DugABqM6Y1oU75iBtJWWYgGeAm36JtX+3mz2uR/f0=
=3UoR
-----END PGP SIGNATURE-----
Merge tag 'docs-5.19' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet:
"It was a moderately busy cycle for documentation; highlights include:
- After a long period of inactivity, the Japanese translations are
seeing some much-needed maintenance and updating.
- Reworked IOMMU documentation
- Some new documentation for static-analysis tools
- A new overall structure for the memory-management documentation.
This is an LSFMM outcome that, it is hoped, will help encourage
developers to fill in the many gaps. Optimism is eternal...but
hopefully it will work.
- More Chinese translations.
Plus the usual typo fixes, updates, etc"
* tag 'docs-5.19' of git://git.lwn.net/linux: (70 commits)
docs: pdfdocs: Add space for chapter counts >= 100 in TOC
docs/zh_CN: Add dev-tools/gdb-kernel-debugging.rst Chinese translation
input: Docs: correct ntrig.rst typo
input: Docs: correct atarikbd.rst typos
MAINTAINERS: Become the docs/zh_CN maintainer
docs/zh_CN: fix devicetree usage-model translation
mm,doc: Add new documentation structure
Documentation: drop more IDE boot options and ide-cd.rst
Documentation/process: use scripts/get_maintainer.pl on patches
MAINTAINERS: Add entry for DOCUMENTATION/JAPANESE
docs/trans/ja_JP/howto: Don't mention specific kernel versions
docs/ja_JP/SubmittingPatches: Request summaries for commit references
docs/ja_JP/SubmittingPatches: Add Suggested-by as a standard signature
docs/ja_JP/SubmittingPatches: Randy has moved
docs/ja_JP/SubmittingPatches: Suggest the use of scripts/get_maintainer.pl
docs/ja_JP/SubmittingPatches: Update GregKH links
Documentation/sysctl: document max_rcu_stall_to_panic
Documentation: add missing angle bracket in cgroup-v2 doc
Documentation: dev-tools: use literal block instead of code-block
docs/zh_CN: add vm numa translation
...
|
||
|
Linus Torvalds
|
0350785b0a |
integrity-v5.19
-----BEGIN PGP SIGNATURE-----
iIoEABYIADIWIQQdXVVFGN5XqKr1Hj7LwZzRsCrn5QUCYo0tOhQcem9oYXJAbGlu
dXguaWJtLmNvbQAKCRDLwZzRsCrn5QJfAP47Ym9vacLc1m8/MUaRA/QjbJ/8t3TX
h/4McK8kiRudxgD/RiPHII6gJ8q+qpBrYWJZ4ZZaHE8v0oA1viuZfbuN2wc=
=KQYi
-----END PGP SIGNATURE-----
Merge tag 'integrity-v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
Pull IMA updates from Mimi Zohar:
"New is IMA support for including fs-verity file digests and signatures
in the IMA measurement list as well as verifying the fs-verity file
digest based signatures, both based on policy.
In addition, are two bug fixes:
- avoid reading UEFI variables, which cause a page fault, on Apple
Macs with T2 chips.
- remove the original "ima" template Kconfig option to address a boot
command line ordering issue.
The rest is a mixture of code/documentation cleanup"
* tag 'integrity-v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity:
integrity: Fix sparse warnings in keyring_handler
evm: Clean up some variables
evm: Return INTEGRITY_PASS for enum integrity_status value '0'
efi: Do not import certificates from UEFI Secure Boot for T2 Macs
fsverity: update the documentation
ima: support fs-verity file digest based version 3 signatures
ima: permit fsverity's file digests in the IMA measurement list
ima: define a new template field named 'd-ngv2' and templates
fs-verity: define a function to return the integrity protected file digest
ima: use IMA default hash algorithm for integrity violations
ima: fix 'd-ng' comments and documentation
ima: remove the IMA_TEMPLATE Kconfig option
ima: remove redundant initialization of pointer 'file'.
|
||
|
Linus Torvalds
|
7cf6a8a17f |
tpmdd updates for v5.19-rc1
- Strictened validation of key hashes for SYSTEM_BLACKLIST_HASH_LIST. An invalid hash format causes a compilation error. Previously, they got included to the kernel binary but were silently ignored at run-time. - Allow root user to append new hashes to the blacklist keyring. - Trusted keys backed with Cryptographic Acceleration and Assurance Module (CAAM), which part of some of the new NXP's SoC's. Now there is total three hardware backends for trusted keys: TPM, ARM TEE and CAAM. - A scattered set of fixes and small improvements for the TPM driver. Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org> -----BEGIN PGP SIGNATURE----- iIgEABYIADAWIQRE6pSOnaBC00OEHEIaerohdGur0gUCYoux6xIcamFya2tvQGtl cm5lbC5vcmcACgkQGnq6IXRrq9LTQgEA4zRrlmLPjhZ1iZpPZiyBBv5eOx20/c+y R7tCfJFB2+ABAOT1E885vt+GgKTY4mYloHJ+ZtnTIf1QRMP6EoSX+TwP =oBOO -----END PGP SIGNATURE----- Merge tag 'tpmdd-next-v5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd Pull tpm updates from Jarkko Sakkinen: - Tightened validation of key hashes for SYSTEM_BLACKLIST_HASH_LIST. An invalid hash format causes a compilation error. Previously, they got included to the kernel binary but were silently ignored at run-time. - Allow root user to append new hashes to the blacklist keyring. - Trusted keys backed with Cryptographic Acceleration and Assurance Module (CAAM), which part of some of the new NXP's SoC's. Now there is total three hardware backends for trusted keys: TPM, ARM TEE and CAAM. - A scattered set of fixes and small improvements for the TPM driver. * tag 'tpmdd-next-v5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd: MAINTAINERS: add KEYS-TRUSTED-CAAM doc: trusted-encrypted: describe new CAAM trust source KEYS: trusted: Introduce support for NXP CAAM-based trusted keys crypto: caam - add in-kernel interface for blob generator crypto: caam - determine whether CAAM supports blob encap/decap KEYS: trusted: allow use of kernel RNG for key material KEYS: trusted: allow use of TEE as backend without TCG_TPM support tpm: Add field upgrade mode support for Infineon TPM2 modules tpm: Fix buffer access in tpm2_get_tpm_pt() char: tpm: cr50_i2c: Suppress duplicated error message in .remove() tpm: cr50: Add new device/vendor ID 0x504a6666 tpm: Remove read16/read32/write32 calls from tpm_tis_phy_ops tpm: ibmvtpm: Correct the return value in tpm_ibmvtpm_probe() tpm/tpm_ftpm_tee: Return true/false (not 1/0) from bool functions certs: Explain the rationale to call panic() certs: Allow root user to append signed hashes to the blacklist keyring certs: Check that builtin blacklist hashes are valid certs: Make blacklist_vet_description() more strict certs: Factor out the blacklist hash creation tools/certs: Add print-cert-tbs-hash.sh |
||
|
Linus Torvalds
|
143a6252e1 |
arm64 updates for 5.19:
- Initial support for the ARMv9 Scalable Matrix Extension (SME). SME takes the approach used for vectors in SVE and extends this to provide architectural support for matrix operations. No KVM support yet, SME is disabled in guests. - Support for crashkernel reservations above ZONE_DMA via the 'crashkernel=X,high' command line option. - btrfs search_ioctl() fix for live-lock with sub-page faults. - arm64 perf updates: support for the Hisilicon "CPA" PMU for monitoring coherent I/O traffic, support for Arm's CMN-650 and CMN-700 interconnect PMUs, minor driver fixes, kerneldoc cleanup. - Kselftest updates for SME, BTI, MTE. - Automatic generation of the system register macros from a 'sysreg' file describing the register bitfields. - Update the type of the function argument holding the ESR_ELx register value to unsigned long to match the architecture register size (originally 32-bit but extended since ARMv8.0). - stacktrace cleanups. - ftrace cleanups. - Miscellaneous updates, most notably: arm64-specific huge_ptep_get(), avoid executable mappings in kexec/hibernate code, drop TLB flushing from get_clear_flush() (and rename it to get_clear_contig()), ARCH_NR_GPIO bumped to 2048 for ARCH_APPLE. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE5RElWfyWxS+3PLO2a9axLQDIXvEFAmKH19IACgkQa9axLQDI XvEFWg//bf0p6zjeNaOJmBbyVFsXsVyYiEaLUpFPUs3oB+81s2YZ+9i1rgMrNCft EIDQ9+/HgScKxJxnzWf68heMdcBDbk76VJtLALExbge6owFsjByQDyfb/b3v/bLd ezAcGzc6G5/FlI1IP7ct4Z9MnQry4v5AG8lMNAHjnf6GlBS/tYNAqpmj8HpQfgRQ ZbhfZ8Ayu3TRSLWL39NHVevpmxQm/bGcpP3Q9TtjUqg0r1FQ5sK/LCqOksueIAzT UOgUVYWSFwTpLEqbYitVqgERQp9LiLoK5RmNYCIEydfGM7+qmgoxofSq5e2hQtH2 SZM1XilzsZctRbBbhMit1qDBqMlr/XAy/R5FO0GauETVKTaBhgtj6mZGyeC9nU/+ RGDljaArbrOzRwMtSuXF+Fp6uVo5spyRn1m8UT/k19lUTdrV9z6EX5Fzuc4Mnhed oz4iokbl/n8pDObXKauQspPA46QpxUYhrAs10B/ELc3yyp/Qj3jOfzYHKDNFCUOq HC9mU+YiO9g2TbYgCrrFM6Dah2E8fU6/cR0ZPMeMgWK4tKa+6JMEINYEwak9e7M+ 8lZnvu3ntxiJLN+PrPkiPyG+XBh2sux1UfvNQ+nw4Oi9xaydeX7PCbQVWmzTFmHD q7UPQ8220e2JNCha9pULS8cxDLxiSksce06DQrGXwnHc1Ir7T04= =0DjE -----END PGP SIGNATURE----- Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 updates from Catalin Marinas: - Initial support for the ARMv9 Scalable Matrix Extension (SME). SME takes the approach used for vectors in SVE and extends this to provide architectural support for matrix operations. No KVM support yet, SME is disabled in guests. - Support for crashkernel reservations above ZONE_DMA via the 'crashkernel=X,high' command line option. - btrfs search_ioctl() fix for live-lock with sub-page faults. - arm64 perf updates: support for the Hisilicon "CPA" PMU for monitoring coherent I/O traffic, support for Arm's CMN-650 and CMN-700 interconnect PMUs, minor driver fixes, kerneldoc cleanup. - Kselftest updates for SME, BTI, MTE. - Automatic generation of the system register macros from a 'sysreg' file describing the register bitfields. - Update the type of the function argument holding the ESR_ELx register value to unsigned long to match the architecture register size (originally 32-bit but extended since ARMv8.0). - stacktrace cleanups. - ftrace cleanups. - Miscellaneous updates, most notably: arm64-specific huge_ptep_get(), avoid executable mappings in kexec/hibernate code, drop TLB flushing from get_clear_flush() (and rename it to get_clear_contig()), ARCH_NR_GPIO bumped to 2048 for ARCH_APPLE. * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (145 commits) arm64/sysreg: Generate definitions for FAR_ELx arm64/sysreg: Generate definitions for DACR32_EL2 arm64/sysreg: Generate definitions for CSSELR_EL1 arm64/sysreg: Generate definitions for CPACR_ELx arm64/sysreg: Generate definitions for CONTEXTIDR_ELx arm64/sysreg: Generate definitions for CLIDR_EL1 arm64/sve: Move sve_free() into SVE code section arm64: Kconfig.platforms: Add comments arm64: Kconfig: Fix indentation and add comments arm64: mm: avoid writable executable mappings in kexec/hibernate code arm64: lds: move special code sections out of kernel exec segment arm64/hugetlb: Implement arm64 specific huge_ptep_get() arm64/hugetlb: Use ptep_get() to get the pte value of a huge page arm64: kdump: Do not allocate crash low memory if not needed arm64/sve: Generate ZCR definitions arm64/sme: Generate defintions for SVCR arm64/sme: Generate SMPRI_EL1 definitions arm64/sme: Automatically generate SMPRIMAP_EL2 definitions arm64/sme: Automatically generate SMIDR_EL1 defines arm64/sme: Automatically generate defines for SMCR ... |
||
|
Linus Torvalds
|
a13dc4d409 |
- Serious sanitization and cleanup of the whole APERF/MPERF and
frequency invariance code along with removing the need for unnecessary IPIs - Finally remove a.out support - The usual trivial cleanups and fixes all over x86 -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmKLn48ACgkQEsHwGGHe VUpbkg/+PELrc0y/qxLM/+dyftKYY16Rhk6ZVAXfwqlh5ldyVQcLMUgKwDqYyTn2 XmgdI3cTcFlH2K7j6ANWLu0I9NPaviimUcEdMVcXt7aY5mGWk/q4hIyCYM8d41sV qKx4OjNSdyoofG6MtwFLJDuoeVg99Bqgvm4nP9BuxL0dZJ2hfcUZ7MTxYCx9ZYjK /3trx0NV287Yg/wm91EU0nLQzy9xbGS7WCmMnse6uxiUdm2vXbBt8oNFF4f747Dj 0cArfNrMgYq4Cv5bgt/Ki0NU/n4EOGDpJUSyQwlnjDKeN81ESPy7IWtTQ6cE/rJK BZeUIPiGiYHwtqXv0UTAPGLG8cAqKeab8u0xAOyrFVDkTc0+WlPJRsUAOmRRGIGE M8ZjoxrLeuFgxw6vKpVjaA+mDRj3qEpSH+IrTcekS98PN7gmVzvq03GobgGbT7YB xmtbThJa+514FfUVckkyC0+A56BknUIgVxwFPqrthE2atzYTbH67hW4U0yVWXXr7 2VI7ttozBrYVgHCWhD9eoT0uhyD74Vl6pqHnqzY9ShIfKVUGvMgKHHg04nLLtF7W hm87xV3Q5UEmXhTmDzT1rUZ99mBUxGbWxk227I9raMugIh7pp9wIr57+7O0LRYfX TdnE2+tL8RMi7+XzRH5iLhnwkrvahBESeHSQ7GVI1Y2zMmmFN+0= =Dks/ -----END PGP SIGNATURE----- Merge tag 'x86_cleanups_for_v5.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 cleanups from Borislav Petkov: - Serious sanitization and cleanup of the whole APERF/MPERF and frequency invariance code along with removing the need for unnecessary IPIs - Finally remove a.out support - The usual trivial cleanups and fixes all over x86 * tag 'x86_cleanups_for_v5.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits) x86: Remove empty files x86/speculation: Add missing srbds=off to the mitigations= help text x86/prctl: Remove pointless task argument x86/aperfperf: Make it correct on 32bit and UP kernels x86/aperfmperf: Integrate the fallback code from show_cpuinfo() x86/aperfmperf: Replace arch_freq_get_on_cpu() x86/aperfmperf: Replace aperfmperf_get_khz() x86/aperfmperf: Store aperf/mperf data for cpu frequency reads x86/aperfmperf: Make parts of the frequency invariance code unconditional x86/aperfmperf: Restructure arch_scale_freq_tick() x86/aperfmperf: Put frequency invariance aperf/mperf data into a struct x86/aperfmperf: Untangle Intel and AMD frequency invariance init x86/aperfmperf: Separate AP/BP frequency invariance init x86/smp: Move APERF/MPERF code where it belongs x86/aperfmperf: Dont wake idle CPUs in arch_freq_get_on_cpu() x86/process: Fix kernel-doc warning due to a changed function name x86: Remove a.out support x86/mm: Replace nodes_weight() with nodes_empty() where appropriate x86: Replace cpumask_weight() with cpumask_empty() where appropriate x86/pkeys: Remove __arch_set_user_pkey_access() declaration ... |
||
|
Linus Torvalds
|
c5a3d3c01e |
- Remove a bunch of chicken bit options to turn off CPU features which
are not really needed anymore - Misc fixes and cleanups -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmKLdfgACgkQEsHwGGHe VUpB5Q//TIGVgmnSd0YYxY2cIe047lfcd34D+3oEGk0d2FidtirP/tjgBqIXRuY5 UncoveqBuI/6/7bodP/ANg9DNVXv2489eFYyZtEOLSGnfzV2AU10aw95cuQQG+BW YIc6bGSsgfiNo8Vtj4L3xkVqxOrqaCYnh74GTSNNANht3i8KH8Qq9n3qZTuMiF6R fH9xWak3TZB2nMzHdYrXh0sSR6eBHN3KYSiT0DsdlU9PUlavlSPFYQRiAlr6FL6J BuYQdlUaCQbINvaviGW4SG7fhX32RfF/GUNaBajB40TO6H98KZLpBBvstWQ841xd /o44o5wbghoGP1ne8OKwP+SaAV2bE6twd5eO1lpwcpXnQfATvjQ2imxvOiRhy5LY pFPt/hko9gKWJ6SI0SQ4tiKJALFPLWD6561scHU6PoriFhv0SRIaPmJyEsDYynMz bCXaPPsoovRwwwBfAxxQjljIlhQSBVt3gWZ8NWD1tYbNaqM+WK7xKBaONGh3OCw3 iK7lsbbljtM0zmANImYyeo7+Hr1NVOmMiK2WZYbxhxgzH3l8v/6EbDt3I70WU57V 9apCU3/nk/HFpX65SdW5qmuiWLVdH9NXrEqbvaUB4ApT18MdUUugewBhcGnf3Umu wEtltzziqcIkxzDoXXpBGWpX31S7PsM2XVDqYC7dwuNttgEw2Fc= =7AUX -----END PGP SIGNATURE----- Merge tag 'x86_cpu_for_v5.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 CPU feature updates from Borislav Petkov: - Remove a bunch of chicken bit options to turn off CPU features which are not really needed anymore - Misc fixes and cleanups * tag 'x86_cpu_for_v5.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/speculation: Add missing prototype for unpriv_ebpf_notify() x86/pm: Fix false positive kmemleak report in msr_build_context() x86/speculation/srbds: Do not try to turn mitigation off when not supported x86/cpu: Remove "noclflush" x86/cpu: Remove "noexec" x86/cpu: Remove "nosmep" x86/cpu: Remove CONFIG_X86_SMAP and "nosmap" x86/cpu: Remove "nosep" x86/cpu: Allow feature bit names from /proc/cpuinfo in clearcpuid= |
||
|
Linus Torvalds
|
eb39e37d5c |
AMD SEV-SNP support
Add to confidential guests the necessary memory integrity protection against malicious hypervisor-based attacks like data replay, memory remapping and others, thus achieving a stronger isolation from the hypervisor. At the core of the functionality is a new structure called a reverse map table (RMP) with which the guest has a say in which pages get assigned to it and gets notified when a page which it owns, gets accessed/modified under the covers so that the guest can take an appropriate action. In addition, add support for the whole machinery needed to launch a SNP guest, details of which is properly explained in each patch. And last but not least, the series refactors and improves parts of the previous SEV support so that the new code is accomodated properly and not just bolted on. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmKLU2AACgkQEsHwGGHe VUpb/Q//f4LGiJf4nw1flzpe90uIsHNwAafng3NOjeXmhI/EcOlqPf23WHPCgg3Z 2umfa4sRZyj4aZubDd7tYAoq4qWrQ7pO7viWCNTh0InxBAILOoMPMuq2jSAbq0zV ASUJXeQ2bqjYxX4JV4N5f3HT2l+k68M0mpGLN0H+O+LV9pFS7dz7Jnsg+gW4ZP25 PMPLf6FNzO/1tU1aoYu80YDP1ne4eReLrNzA7Y/rx+S2NAetNwPn21AALVgoD4Nu vFdKh4MHgtVbwaQuh0csb/+4vD+tDXAhc8lbIl+Abl9ZxJaDWtAJW5D9e2CnsHk1 NOkHwnrzizzhtGK1g56YPUVRFAWhZYMOI1hR0zGPLQaVqBnN4b+iahPeRiV0XnGE PSbIHSfJdeiCkvLMCdIAmpE5mRshhRSUfl1CXTCdetMn8xV/qz/vG6bXssf8yhTV cfLGPHU7gfVmsbR9nk5a8KZ78PaytxOxfIDXvCy8JfQwlIWtieaCcjncrj+sdMJy 0fdOuwvi4jma0cyYuPolKiS1Hn4ldeibvxXT7CZQlIx6jZShMbpfpTTJs11XdtHm PdDAc1TY3AqI33mpy9DhDQmx/+EhOGxY3HNLT7evRhv4CfdQeK3cPVUWgo4bGNVv ZnFz7nvmwpyufltW9K8mhEZV267174jXGl6/idxybnlVE7ESr2Y= =Y8kW -----END PGP SIGNATURE----- Merge tag 'x86_sev_for_v5.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull AMD SEV-SNP support from Borislav Petkov: "The third AMD confidential computing feature called Secure Nested Paging. Add to confidential guests the necessary memory integrity protection against malicious hypervisor-based attacks like data replay, memory remapping and others, thus achieving a stronger isolation from the hypervisor. At the core of the functionality is a new structure called a reverse map table (RMP) with which the guest has a say in which pages get assigned to it and gets notified when a page which it owns, gets accessed/modified under the covers so that the guest can take an appropriate action. In addition, add support for the whole machinery needed to launch a SNP guest, details of which is properly explained in each patch. And last but not least, the series refactors and improves parts of the previous SEV support so that the new code is accomodated properly and not just bolted on" * tag 'x86_sev_for_v5.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (60 commits) x86/entry: Fixup objtool/ibt validation x86/sev: Mark the code returning to user space as syscall gap x86/sev: Annotate stack change in the #VC handler x86/sev: Remove duplicated assignment to variable info x86/sev: Fix address space sparse warning x86/sev: Get the AP jump table address from secrets page x86/sev: Add missing __init annotations to SEV init routines virt: sevguest: Rename the sevguest dir and files to sev-guest virt: sevguest: Change driver name to reflect generic SEV support x86/boot: Put globals that are accessed early into the .data section x86/boot: Add an efi.h header for the decompressor virt: sevguest: Fix bool function returning negative value virt: sevguest: Fix return value check in alloc_shared_pages() x86/sev-es: Replace open-coded hlt-loop with sev_es_terminate() virt: sevguest: Add documentation for SEV-SNP CPUID Enforcement virt: sevguest: Add support to get extended report virt: sevguest: Add support to derive key virt: Add SEV-SNP guest driver x86/sev: Register SEV-SNP guest request platform device x86/sev: Provide support for SNP guest request NAEs ... |
||
|
Linus Torvalds
|
8a32f81a89 |
ata changes for 5.19-rc1
For this cycle, the libata.force kernel parameter changes stand out.
Beside that, some small cleanups in various drivers. In more details:
* Changes to the pata_mpc52xx driver in preparation for powerpc's
asm/prom.h cleanup, from Christophe.
* Improved ATA command allocation, from John.
* Various small cleanups to the pata_via, pata_sil680, pata_ftide010,
sata_gemini, ahci_brcm drivers and to libata-core, from Sergey, Diego,
Ruyi, Mighao and Jiabing.
* Add support for the RZ/G2H SoC to the rcar-sata driver, from Lad.
* AHCI RAID ID cleanup, from Dan.
* Improvement to the libata.force kernel parameter to allow most horkage
flags to be manually forced for debugging drive issues in the field
without needing recompiling a kernel, from me.
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQSRPv8tYSvhwAzJdzjdoc3SxdoYdgUCYosMtQAKCRDdoc3SxdoY
dhi6APsGXkkiaTheBeshjhPZiet80iEh4gJknp5QwgJ6QovjDwEAzjApUC0S1sq2
atD4Y7T6HnKQBp66lJHvvgbFuHlxMgg=
=YuEq
-----END PGP SIGNATURE-----
Merge tag 'ata-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata
Pull ata updates from Damien Le Moal:
"For this cycle, the libata.force kernel parameter changes stand out.
Beside that, some small cleanups in various drivers. In more detail:
- Changes to the pata_mpc52xx driver in preparation for powerpc's
asm/prom.h cleanup, from Christophe.
- Improved ATA command allocation, from John.
- Various small cleanups to the pata_via, pata_sil680, pata_ftide010,
sata_gemini, ahci_brcm drivers and to libata-core, from Sergey,
Diego, Ruyi, Mighao and Jiabing.
- Add support for the RZ/G2H SoC to the rcar-sata driver, from Lad.
- AHCI RAID ID cleanup, from Dan.
- Improvement to the libata.force kernel parameter to allow most
horkage flags to be manually forced for debugging drive issues in
the field without needing recompiling a kernel, from me"
* tag 'ata-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata:
ata: pata_ftide010: Remove unneeded ERROR check before clk_disable_unprepare
doc: admin-guide: Update libata kernel parameters
ata: libata-core: Allow forcing most horkage flags
ata: libata-core: Improve link flags forced settings
ata: libata-core: Refactor force_tbl definition
ata: libata-core: cleanup ata_device_blacklist
ata: simplify the return expression of brcm_ahci_remove
ata: Make use of the helper function devm_platform_ioremap_resource()
ata: libata-core: replace "its" with "it is"
ahci: Add a generic 'controller2' RAID id
dt-bindings: ata: renesas,rcar-sata: Add r8a774e1 support
ata: pata_via: fix sloppy typing in via_do_set_mode()
ata: pata_sil680: fix result type of sil680_sel{dev|reg}()
ata: libata-core: fix parameter type in ata_xfer_mode2shift()
libata: Improve ATA queued command allocation
ata: pata_mpc52xx: Prepare cleanup of powerpc's asm/prom.h
|
||
Ahmad Fatoum
|
e9c5048c2d |
KEYS: trusted: Introduce support for NXP CAAM-based trusted keys
The Cryptographic Acceleration and Assurance Module (CAAM) is an IP core built into many newer i.MX and QorIQ SoCs by NXP. The CAAM does crypto acceleration, hardware number generation and has a blob mechanism for encapsulation/decapsulation of sensitive material. This blob mechanism depends on a device specific random 256-bit One Time Programmable Master Key that is fused in each SoC at manufacturing time. This key is unreadable and can only be used by the CAAM for AES encryption/decryption of user data. This makes it a suitable backend (source) for kernel trusted keys. Previous commits generalized trusted keys to support multiple backends and added an API to access the CAAM blob mechanism. Based on these, provide the necessary glue to use the CAAM for trusted keys. Reviewed-by: David Gstir <david@sigma-star.at> Reviewed-by: Pankaj Gupta <pankaj.gupta@nxp.com> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Tested-by: Tim Harvey <tharvey@gateworks.com> Tested-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com> Tested-by: Pankaj Gupta <pankaj.gupta@nxp.com> Tested-by: Michael Walle <michael@walle.cc> # on ls1028a (non-E and E) Tested-by: John Ernberg <john.ernberg@actia.se> # iMX8QXP Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de> Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org> |
||
|
Ahmad Fatoum
|
fcd7c26901 |
KEYS: trusted: allow use of kernel RNG for key material
The two existing trusted key sources don't make use of the kernel RNG, but instead let the hardware doing the sealing/unsealing also generate the random key material. However, both users and future backends may want to place less trust into the quality of the trust source's random number generator and instead reuse the kernel entropy pool, which can be seeded from multiple entropy sources. Make this possible by adding a new trusted.rng parameter, that will force use of the kernel RNG. In its absence, it's up to the trust source to decide, which random numbers to use, maintaining the existing behavior. Suggested-by: Jarkko Sakkinen <jarkko@kernel.org> Acked-by: Sumit Garg <sumit.garg@linaro.org> Acked-by: Pankaj Gupta <pankaj.gupta@nxp.com> Reviewed-by: David Gstir <david@sigma-star.at> Reviewed-by: Pankaj Gupta <pankaj.gupta@nxp.com> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Tested-by: Pankaj Gupta <pankaj.gupta@nxp.com> Tested-by: Michael Walle <michael@walle.cc> # on ls1028a (non-E and E) Tested-by: John Ernberg <john.ernberg@actia.se> # iMX8QXP Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de> Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org> |
||
|
Pawan Gupta
|
8cb861e9e3 |
x86/speculation/mmio: Add mitigation for Processor MMIO Stale Data
Processor MMIO Stale Data is a class of vulnerabilities that may
expose data after an MMIO operation. For details please refer to
Documentation/admin-guide/hw-vuln/processor_mmio_stale_data.rst.
These vulnerabilities are broadly categorized as:
Device Register Partial Write (DRPW):
Some endpoint MMIO registers incorrectly handle writes that are
smaller than the register size. Instead of aborting the write or only
copying the correct subset of bytes (for example, 2 bytes for a 2-byte
write), more bytes than specified by the write transaction may be
written to the register. On some processors, this may expose stale
data from the fill buffers of the core that created the write
transaction.
Shared Buffers Data Sampling (SBDS):
After propagators may have moved data around the uncore and copied
stale data into client core fill buffers, processors affected by MFBDS
can leak data from the fill buffer.
Shared Buffers Data Read (SBDR):
It is similar to Shared Buffer Data Sampling (SBDS) except that the
data is directly read into the architectural software-visible state.
An attacker can use these vulnerabilities to extract data from CPU fill
buffers using MDS and TAA methods. Mitigate it by clearing the CPU fill
buffers using the VERW instruction before returning to a user or a
guest.
On CPUs not affected by MDS and TAA, user application cannot sample data
from CPU fill buffers using MDS or TAA. A guest with MMIO access can
still use DRPW or SBDR to extract data architecturally. Mitigate it with
VERW instruction to clear fill buffers before VMENTER for MMIO capable
guests.
Add a kernel parameter mmio_stale_data={off|full|full,nosmt} to control
the mitigation.
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
|
||
Hans de Goede
|
fa6dae5d82 |
x86/PCI: Add kernel cmdline options to use/ignore E820 reserved regions
Some firmware supplies PCI host bridge _CRS that includes address space unusable by PCI devices, e.g., space occupied by host bridge registers or used by hidden PCI devices. To avoid this unusable space, Linux currently excludes E820 reserved regions from _CRS windows; see |
||
Saravana Kannan
|
2b28a1a84a |
driver core: Extend deferred probe timeout on driver registration
The deferred probe timer that's used for this currently starts at late_initcall and runs for driver_deferred_probe_timeout seconds. The assumption being that all available drivers would be loaded and registered before the timer expires. This means, the driver_deferred_probe_timeout has to be pretty large for it to cover the worst case. But if we set the default value for it to cover the worst case, it would significantly slow down the average case. For this reason, the default value is set to 0. Also, with CONFIG_MODULES=y and the current default values of driver_deferred_probe_timeout=0 and fw_devlink=on, devices with missing drivers will cause their consumer devices to always defer their probes. This is because device links created by fw_devlink defer the probe even before the consumer driver's probe() is called. Instead of a fixed timeout, if we extend an unexpired deferred probe timer on every successful driver registration, with the expectation more modules would be loaded in the near future, then the default value of driver_deferred_probe_timeout only needs to be as long as the worst case time difference between two consecutive module loads. So let's implement that and set the default value to 10 seconds when CONFIG_MODULES=y. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Rob Herring <robh@kernel.org> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Will Deacon <will@kernel.org> Cc: Ulf Hansson <ulf.hansson@linaro.org> Cc: Kevin Hilman <khilman@kernel.org> Cc: Thierry Reding <treding@nvidia.com> Cc: Mark Brown <broonie@kernel.org> Cc: Pavel Machek <pavel@ucw.cz> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Cc: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Cc: linux-gpio@vger.kernel.org Cc: linux-pm@vger.kernel.org Cc: iommu@lists.linux-foundation.org Reviewed-by: Mark Brown <broonie@kernel.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Saravana Kannan <saravanak@google.com> Link: https://lore.kernel.org/r/20220429220933.1350374-1-saravanak@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
||
|
Saravana Kannan
|
f79f662e4c |
driver core: Add "*" wildcard support to driver_async_probe cmdline param
There's currently no way to use driver_async_probe kernel cmdline param to enable default async probe for all drivers. So, add support for "*" to match with all driver names. When "*" is used, all other drivers listed in driver_async_probe are drivers that will NOT match the "*". For example: * driver_async_probe=drvA,drvB,drvC drvA, drvB and drvC do asynchronous probing. * driver_async_probe=* All drivers do asynchronous probing except those that have set PROBE_FORCE_SYNCHRONOUS flag. * driver_async_probe=*,drvA,drvB,drvC All drivers do asynchronous probing except drvA, drvB, drvC and those that have set PROBE_FORCE_SYNCHRONOUS flag. Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Feng Tang <feng.tang@intel.com> Signed-off-by: Saravana Kannan <saravanak@google.com> Link: https://lore.kernel.org/r/20220504005344.117803-1-saravanak@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
||
Zhen Lei
|
8f0f104e2a |
arm64: kdump: Do not allocate crash low memory if not needed
When "crashkernel=X,high" is specified, the specified "crashkernel=Y,low" memory is not required in the following corner cases: 1. If both CONFIG_ZONE_DMA and CONFIG_ZONE_DMA32 are disabled, it means that the devices can access any memory. 2. If the system memory is small, the crash high memory may be allocated from the DMA zones. If that happens, there's no need to allocate another crash low memory because there's already one. Add condition '(crash_base >= CRASH_ADDR_LOW_MAX)' to determine whether the 'high' memory is allocated above DMA zones. Note: when both CONFIG_ZONE_DMA and CONFIG_ZONE_DMA32 are disabled, the entire physical memory is DMA accessible, CRASH_ADDR_LOW_MAX equals 'PHYS_MASK + 1'. Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Acked-by: Baoquan He <bhe@redhat.com> Link: https://lore.kernel.org/r/20220511032033.426-1-thunder.leizhen@huawei.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> |
||
|
Muchun Song
|
9c54c522bb |
mm: hugetlb_vmemmap: use kstrtobool for hugetlb_vmemmap param parsing
Use kstrtobool rather than open coding "on" and "off" parsing in mm/hugetlb_vmemmap.c, which is more powerful to handle all kinds of parameters like 'Yy1Nn0' or [oO][NnFf] for "on" and "off". Link: https://lkml.kernel.org/r/20220512041142.39501-4-songmuchun@bytedance.com Signed-off-by: Muchun Song <songmuchun@bytedance.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: David Hildenbrand <david@redhat.com> Cc: Iurii Zaikin <yzaikin@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Kees Cook <keescook@chromium.org> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Oscar Salvador <osalvador@suse.de> Cc: Xiongchun Duan <duanxiongchun@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
Xiao Yang
|
553b0cb30b |
x86/speculation: Add missing srbds=off to the mitigations= help text
The mitigations= cmdline option help text misses the srbds=off option. Add it. [ bp: Add a commit message. ] Signed-off-by: Xiao Yang <yangx.jy@fujitsu.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lore.kernel.org/r/20220513101637.216487-1-yangx.jy@fujitsu.com |
||
|
Paul E. McKenney
|
ce13389053 |
Merge branch 'exp.2022.05.11a' into HEAD
exp.2022.05.11a: Expedited-grace-period latency-reduction updates. |
||
Uladzislau Rezki
|
28b3ae4265 |
rcu: Introduce CONFIG_RCU_EXP_CPU_STALL_TIMEOUT
Currently both expedited and regular grace period stall warnings use a single timeout value that with units of seconds. However, recent Android use cases problem require a sub-100-millisecond expedited RCU CPU stall warning. Given that expedited RCU grace periods normally complete in far less than a single millisecond, especially for small systems, this is not unreasonable. Therefore introduce the CONFIG_RCU_EXP_CPU_STALL_TIMEOUT kernel configuration that defaults to 20 msec on Android and remains the same as that of the non-expedited stall warnings otherwise. It also can be changed in run-time via: /sys/.../parameters/rcu_exp_cpu_stall_timeout. [ paulmck: Default of zero to use CONFIG_RCU_STALL_TIMEOUT. ] Signed-off-by: Uladzislau Rezki <uladzislau.rezki@sony.com> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
||
|
Randy Dunlap
|
4a840d5fdc |
Documentation: drop more IDE boot options and ide-cd.rst
Drop ide-* command line options.
Drop cdrom/ide-cd.rst documentation.
Fixes:
|
||
Damien Le Moal
|
fa82cabb88 |
doc: admin-guide: Update libata kernel parameters
Cleanup the text text describing the libata.force boot parameter and update the list of the values to include all supported horkage and link flag that can be forced. Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Reviewed-by: Hannes Reinecke <hare@suse.de> |
||
|
Zhen Lei
|
5832f1ae50 |
docs: kdump: Update the crashkernel description for arm64
Now arm64 has added support for "crashkernel=X,high" and "crashkernel=Y,low". Unlike x86, crash low memory is not allocated if "crashkernel=Y,low" is not specified. Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Acked-by: Baoquan He <bhe@redhat.com> Link: https://lore.kernel.org/r/20220506114402.365-7-thunder.leizhen@huawei.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> |
||
Mimi Zohar
|
989dc72511 |
ima: define a new template field named 'd-ngv2' and templates
In preparation to differentiate between unsigned regular IMA file hashes and fs-verity's file digests in the IMA measurement list, define a new template field named 'd-ngv2'. Also define two new templates named 'ima-ngv2' and 'ima-sigv2', which include the new 'd-ngv2' field. Signed-off-by: Mimi Zohar <zohar@linux.ibm.com> |
||
|
Paul E. McKenney
|
be05ee5437 |
Merge branches 'docs.2022.04.20a', 'fixes.2022.04.20a', 'nocb.2022.04.11b', 'rcu-tasks.2022.04.11b', 'srcu.2022.05.03a', 'torture.2022.04.11b', 'torture-tasks.2022.04.20a' and 'torturescript.2022.04.20a' into HEAD
docs.2022.04.20a: Documentation updates. fixes.2022.04.20a: Miscellaneous fixes. nocb.2022.04.11b: Callback-offloading updates. rcu-tasks.2022.04.11b: RCU-tasks updates. srcu.2022.05.03a: Put SRCU on a memory diet. torture.2022.04.11b: Torture-test updates. torture-tasks.2022.04.20a: Avoid torture testing changing RCU configuration. torturescript.2022.04.20a: Torture-test scripting updates. |
||
|
Paul E. McKenney
|
a57ffb3c6b |
srcu: Automatically determine size-transition strategy at boot
This commit adds a srcutree.convert_to_big option of zero that causes SRCU to decide at boot whether to wait for contention (small systems) or immediately expand to large (large systems). A new srcutree.big_cpu_lim (defaulting to 128) defines how many CPUs constitute a large system. Co-developed-by: Neeraj Upadhyay <quic_neeraju@quicinc.com> Signed-off-by: Neeraj Upadhyay <quic_neeraju@quicinc.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
||
|
Muchun Song
|
47010c040d |
mm: hugetlb_vmemmap: cleanup CONFIG_HUGETLB_PAGE_FREE_VMEMMAP*
The word of "free" is not expressive enough to express the feature of optimizing vmemmap pages associated with each HugeTLB, rename this keywork to "optimize". In this patch , cheanup configs to make code more expressive. Link: https://lkml.kernel.org/r/20220404074652.68024-4-songmuchun@bytedance.com Signed-off-by: Muchun Song <songmuchun@bytedance.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: David Hildenbrand <david@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
|
Paul E. McKenney
|
3791a22374 |
kernel/smp: Provide boot-time timeout for CSD lock diagnostics
Debugging of problems involving insanely long-running SMI handlers proceeds better if the CSD-lock timeout can be adjusted. This commit therefore provides a new smp.csd_lock_timeout kernel boot parameter that specifies the timeout in milliseconds. The default remains at the previously hard-coded value of five seconds. [ paulmck: Apply feedback from Juergen Gross. ] Cc: Rik van Riel <riel@surriel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
||
|
Randy Dunlap
|
389cfd9670 |
docs/admin: alphabetize parts of kernel-parameters.txt (part 2)
Alphabetize several of the kernel boot parameters in kernel-parameters.txt. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
||
|
Randy Dunlap
|
d2fc83c149 |
Docs/admin: alphabetize some kernel-parameters (part 1)
Move some out-of-place kernel parameters into their correct locations. Move one out-of-order keyword/legend in kernel-parameters.rst. Add some missing keyword legends in kernel-parameters.rst: HIBERNATION HYPER_V and drop some obsolete/removed keyword legends: EIDE IOSCHED OSS TS XT Correct the location of the setup.h file. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
||
|
Randy Dunlap
|
59bdbbd5bc |
Docs: admin/kernel-parameters: edit a few boot options
Clean up some of admin-guide/kernel-parameters.txt: a. "smt" should be "smt=" (S390) b. (dropped) c. Sparc supports the vdso= boot option d. make the tp_printk options (2) formatting similar to other options by adding spacing e. add "trace_clock=" with a reference to Documentation/trace/ftrace.rst f. use [IA-64] as documented instead of [ia64] g. fix formatting and text for test_suspend= h. fix formatting for swapaccount= i. fix formatting and grammar for video.brightness_switch_enabled= Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: linux-s390@vger.kernel.org Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: sparclinux@vger.kernel.org Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: linux-ia64@vger.kernel.org Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Pavel Machek <pavel@ucw.cz> Cc: Len Brown <lenb@kernel.org> Cc: linux-pm@vger.kernel.org Cc: linux-acpi@vger.kernel.org Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
||
Akihiko Odaki
|
82850028aa |
x86/efi: Remove references of EFI earlyprintk from documentation
x86 EFI earlyprink was removed with commit
|
||
|
Paul E. McKenney
|
f25390033f |
rcu-tasks: Print pre-stall-warning informational messages
RCU-tasks stall-warning messages are printed after the grace period is ten minutes old. Unfortunately, most of us will have rebooted the system in response to an apparently-hung command long before the ten minutes is up, and will thus see what looks to be a silent hang. This commit therefore adds pr_info() messages that are printed earlier. These should avoid being classified as errors, but should give impatient users a hint. These are controlled by new rcupdate.rcu_task_stall_info and rcupdate.rcu_task_stall_info_mult kernel-boot parameters. The former defines the initial delay in jiffies (defaulting to 10 seconds) and the latter defines the multiplier (defaulting to 3). Thus, by default, the first message will appear 10 seconds into the RCU-tasks grace period, the second 40 seconds in, and the third 160 seconds in. There would be a fourth at 640 seconds in, but the stall warning message appears 600 seconds in, and once a stall warning is printed for a given grace period, no further informational messages are printed. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
||
|
Paul E. McKenney
|
9f2e91d94c |
srcu: Add contention-triggered addition of srcu_node tree
This commit instruments the acquisitions of the srcu_struct structure's
->lock, enabling the initiation of a transition from SRCU_SIZE_SMALL
to SRCU_SIZE_BIG when sufficient contention is experienced. The
instrumentation counts the number of trylock failures within the confines
of a single jiffy. If that number exceeds the value specified by the
srcutree.small_contention_lim kernel boot parameter (which defaults to
100), and if the value specified by the srcutree.convert_to_big kernel
boot parameter has the 0x10 bit set (defaults to 0), then a transition
will be automatically initiated.
By default, there will never be any transitions, so that none of the
srcu_struct structures ever gains an srcu_node array.
The useful values for srcutree.convert_to_big are:
0x00: Never convert.
0x01: Always convert at init_srcu_struct() time.
0x02: Convert when rcutorture prints its first round of statistics.
0x03: Decide conversion approach at boot given system size.
0x10: Convert if contention is encountered.
0x12: Convert if contention is encountered or when rcutorture prints
its first round of statistics, whichever comes first.
The value 0x11 acts the same as 0x01 because the conversion happens
before there is any chance of contention.
[ paulmck: Apply "static" feedback from kernel test robot. ]
Co-developed-by: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Signed-off-by: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
|
||
|
Paul E. McKenney
|
c69a00a12e |
srcu: Add boot-time control over srcu_node array allocation
This commit adds an srcu_tree.convert_to_big kernel parameter that either refuses to convert at all (0), converts immediately at init_srcu_struct() time (1), or lets rcutorture convert it (2). An addition contention-based dynamic conversion choice will be added, along with documentation. [ paulmck: Apply callback-scanning feedback from Neeraj Upadhyay. ] Co-developed-by: Neeraj Upadhyay <quic_neeraju@quicinc.com> Signed-off-by: Neeraj Upadhyay <quic_neeraju@quicinc.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
||
Michael Roth
|
ba37a1438a |
x86/sev: Add a sev= cmdline option
For debugging purposes it is very useful to have a way to see the full contents of the SNP CPUID table provided to a guest. Add an sev=debug kernel command-line option to do so. Also introduce some infrastructure so that additional options can be specified via sev=option1[,option2] over time in a consistent manner. [ bp: Massage, simplify string parsing. ] Suggested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Michael Roth <michael.roth@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lore.kernel.org/r/20220307213356.2797205-41-brijesh.singh@amd.com |
||
Borislav Petkov
|
f8858b5eff |
x86/cpu: Remove "noclflush"
Not really needed anymore and there's clearcpuid=. Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20220127115626.14179-7-bp@alien8.de |
||
|
Borislav Petkov
|
76ea0025a2 |
x86/cpu: Remove "noexec"
It doesn't make any sense to disable non-executable mappings - security-wise or else. So rip out that switch and move the remaining code into setup.c and delete setup_nx.c Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20220127115626.14179-6-bp@alien8.de |
||
|
Borislav Petkov
|
385d2ae0a1 |
x86/cpu: Remove "nosmep"
There should be no need to disable SMEP anymore. Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20220127115626.14179-5-bp@alien8.de |
||
|
Borislav Petkov
|
dbae0a934f |
x86/cpu: Remove CONFIG_X86_SMAP and "nosmap"
Those were added as part of the SMAP enablement but SMAP is currently an integral part of kernel proper and there's no need to disable it anymore. Rip out that functionality. Leave --uaccess default on for objtool as this is what objtool should do by default anyway. If still needed - clearcpuid=smap. Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20220127115626.14179-4-bp@alien8.de |
||
|
Borislav Petkov
|
c949110ef4 |
x86/cpu: Remove "nosep"
That chicken bit was added by
|
||
|
Borislav Petkov
|
1625c833db |
x86/cpu: Allow feature bit names from /proc/cpuinfo in clearcpuid=
Having to give the X86_FEATURE array indices in order to disable a
feature bit for testing is not really user-friendly. So accept the
feature bit names too.
Some feature bits don't have names so there the array indices are still
accepted, of course.
Clearing CPUID flags is not something which should be done in production
so taint the kernel too.
An exemplary cmdline would then be something like:
clearcpuid=de,440,smca,succory,bmi1,3dnow
("succory" is wrong on purpose). And it says:
[ ... ] Clearing CPUID bits: de 13:24 smca (unknown: succory) bmi1 3dnow
[ Fix CONFIG_X86_FEATURE_NAMES=n build error as reported by the 0day
robot: https://lore.kernel.org/r/202203292206.ICsY2RKX-lkp@intel.com ]
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220127115626.14179-2-bp@alien8.de
|
||
Jason A. Donenfeld
|
d97c68d178 |
random: treat bootloader trust toggle the same way as cpu trust toggle
If CONFIG_RANDOM_TRUST_CPU is set, the RNG initializes using RDRAND. But, the user can disable (or enable) this behavior by setting `random.trust_cpu=0/1` on the kernel command line. This allows system builders to do reasonable things while avoiding howls from tinfoil hatters. (Or vice versa.) CONFIG_RANDOM_TRUST_BOOTLOADER is basically the same thing, but regards the seed passed via EFI or device tree, which might come from RDRAND or a TPM or somewhere else. In order to allow distros to more easily enable this while avoiding those same howls (or vice versa), this commit adds the corresponding `random.trust_bootloader=0/1` toggle. Cc: Theodore Ts'o <tytso@mit.edu> Cc: Graham Christensen <graham@grahamc.com> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net> Link: https://github.com/NixOS/nixpkgs/pull/165355 Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> |
||
|
Linus Torvalds
|
52deda9551 |
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton: "Various misc subsystems, before getting into the post-linux-next material. 41 patches. Subsystems affected by this patch series: procfs, misc, core-kernel, lib, checkpatch, init, pipe, minix, fat, cgroups, kexec, kdump, taskstats, panic, kcov, resource, and ubsan" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (41 commits) Revert "ubsan, kcsan: Don't combine sanitizer with kcov on clang" kernel/resource: fix kfree() of bootmem memory again kcov: properly handle subsequent mmap calls kcov: split ioctl handling into locked and unlocked parts panic: move panic_print before kmsg dumpers panic: add option to dump all CPUs backtraces in panic_print docs: sysctl/kernel: add missing bit to panic_print taskstats: remove unneeded dead assignment kasan: no need to unset panic_on_warn in end_report() ubsan: no need to unset panic_on_warn in ubsan_epilogue() panic: unset panic_on_warn inside panic() docs: kdump: add scp example to write out the dump file docs: kdump: update description about sysfs file system support arm64: mm: use IS_ENABLED(CONFIG_KEXEC_CORE) instead of #ifdef x86/setup: use IS_ENABLED(CONFIG_KEXEC_CORE) instead of #ifdef riscv: mm: init: use IS_ENABLED(CONFIG_KEXEC_CORE) instead of #ifdef kexec: make crashk_res, crashk_low_res and crash_notes symbols always visible cgroup: use irqsave in cgroup_rstat_flush_locked(). fat: use pointer to simple type in put_user() minix: fix bug when opening a file with O_DIRECT ... |
||
|
Linus Torvalds
|
1ebdbeb03e |
ARM:
- Proper emulation of the OSLock feature of the debug architecture
- Scalibility improvements for the MMU lock when dirty logging is on
- New VMID allocator, which will eventually help with SVA in VMs
- Better support for PMUs in heterogenous systems
- PSCI 1.1 support, enabling support for SYSTEM_RESET2
- Implement CONFIG_DEBUG_LIST at EL2
- Make CONFIG_ARM64_ERRATUM_2077057 default y
- Reduce the overhead of VM exit when no interrupt is pending
- Remove traces of 32bit ARM host support from the documentation
- Updated vgic selftests
- Various cleanups, doc updates and spelling fixes
RISC-V:
- Prevent KVM_COMPAT from being selected
- Optimize __kvm_riscv_switch_to() implementation
- RISC-V SBI v0.3 support
s390:
- memop selftest
- fix SCK locking
- adapter interruptions virtualization for secure guests
- add Claudio Imbrenda as maintainer
- first step to do proper storage key checking
x86:
- Continue switching kvm_x86_ops to static_call(); introduce
static_call_cond() and __static_call_ret0 when applicable.
- Cleanup unused arguments in several functions
- Synthesize AMD 0x80000021 leaf
- Fixes and optimization for Hyper-V sparse-bank hypercalls
- Implement Hyper-V's enlightened MSR bitmap for nested SVM
- Remove MMU auditing
- Eager splitting of page tables (new aka "TDP" MMU only) when dirty
page tracking is enabled
- Cleanup the implementation of the guest PGD cache
- Preparation for the implementation of Intel IPI virtualization
- Fix some segment descriptor checks in the emulator
- Allow AMD AVIC support on systems with physical APIC ID above 255
- Better API to disable virtualization quirks
- Fixes and optimizations for the zapping of page tables:
- Zap roots in two passes, avoiding RCU read-side critical sections
that last too long for very large guests backed by 4 KiB SPTEs.
- Zap invalid and defunct roots asynchronously via concurrency-managed
work queue.
- Allowing yielding when zapping TDP MMU roots in response to the root's
last reference being put.
- Batch more TLB flushes with an RCU trick. Whoever frees the paging
structure now holds RCU as a proxy for all vCPUs running in the guest,
i.e. to prolongs the grace period on their behalf. It then kicks the
the vCPUs out of guest mode before doing rcu_read_unlock().
Generic:
- Introduce __vcalloc and use it for very large allocations that
need memcg accounting
-----BEGIN PGP SIGNATURE-----
iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmI4fdwUHHBib256aW5p
QHJlZGhhdC5jb20ACgkQv/vSX3jHroMq8gf/WoeVHtw2QlL5Mmz6McvRRmPAYPLV
wLUIFNrRqRvd8Tw4kivzZoh/xTpwmnojv0YdK5SjKAiMjgv094YI1LrNp1JSPvmL
pitocMkA10RSJNWHeEMg9cMSKH0rKiqeYl6S1e2XsdB+UZZ2BINOCVtvglmjTAvJ
dFBdKdBkqjAUZbdXAGIvz4JEEER3N/LkFDKGaUGX+0QIQOzGBPIyLTxynxIDG6mt
RViCCFyXdy5NkVp5hZFm96vQ2qAlWL9B9+iKruQN++82+oqWbeTdSqPhdwF7GyFz
BfOv3gobQ2c4ef/aMLO5LswZ9joI1t/4kQbbAn6dNybpOAz/NXfDnbNefg==
=keox
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm updates from Paolo Bonzini:
"ARM:
- Proper emulation of the OSLock feature of the debug architecture
- Scalibility improvements for the MMU lock when dirty logging is on
- New VMID allocator, which will eventually help with SVA in VMs
- Better support for PMUs in heterogenous systems
- PSCI 1.1 support, enabling support for SYSTEM_RESET2
- Implement CONFIG_DEBUG_LIST at EL2
- Make CONFIG_ARM64_ERRATUM_2077057 default y
- Reduce the overhead of VM exit when no interrupt is pending
- Remove traces of 32bit ARM host support from the documentation
- Updated vgic selftests
- Various cleanups, doc updates and spelling fixes
RISC-V:
- Prevent KVM_COMPAT from being selected
- Optimize __kvm_riscv_switch_to() implementation
- RISC-V SBI v0.3 support
s390:
- memop selftest
- fix SCK locking
- adapter interruptions virtualization for secure guests
- add Claudio Imbrenda as maintainer
- first step to do proper storage key checking
x86:
- Continue switching kvm_x86_ops to static_call(); introduce
static_call_cond() and __static_call_ret0 when applicable.
- Cleanup unused arguments in several functions
- Synthesize AMD 0x80000021 leaf
- Fixes and optimization for Hyper-V sparse-bank hypercalls
- Implement Hyper-V's enlightened MSR bitmap for nested SVM
- Remove MMU auditing
- Eager splitting of page tables (new aka "TDP" MMU only) when dirty
page tracking is enabled
- Cleanup the implementation of the guest PGD cache
- Preparation for the implementation of Intel IPI virtualization
- Fix some segment descriptor checks in the emulator
- Allow AMD AVIC support on systems with physical APIC ID above 255
- Better API to disable virtualization quirks
- Fixes and optimizations for the zapping of page tables:
- Zap roots in two passes, avoiding RCU read-side critical
sections that last too long for very large guests backed by 4
KiB SPTEs.
- Zap invalid and defunct roots asynchronously via
concurrency-managed work queue.
- Allowing yielding when zapping TDP MMU roots in response to the
root's last reference being put.
- Batch more TLB flushes with an RCU trick. Whoever frees the
paging structure now holds RCU as a proxy for all vCPUs running
in the guest, i.e. to prolongs the grace period on their behalf.
It then kicks the the vCPUs out of guest mode before doing
rcu_read_unlock().
Generic:
- Introduce __vcalloc and use it for very large allocations that need
memcg accounting"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (246 commits)
KVM: use kvcalloc for array allocations
KVM: x86: Introduce KVM_CAP_DISABLE_QUIRKS2
kvm: x86: Require const tsc for RT
KVM: x86: synthesize CPUID leaf 0x80000021h if useful
KVM: x86: add support for CPUID leaf 0x80000021
KVM: x86: do not use KVM_X86_OP_OPTIONAL_RET0 for get_mt_mask
Revert "KVM: x86/mmu: Zap only TDP MMU leafs in kvm_zap_gfn_range()"
kvm: x86/mmu: Flush TLB before zap_gfn_range releases RCU
KVM: arm64: fix typos in comments
KVM: arm64: Generalise VM features into a set of flags
KVM: s390: selftests: Add error memop tests
KVM: s390: selftests: Add more copy memop tests
KVM: s390: selftests: Add named stages for memop test
KVM: s390: selftests: Add macro as abstraction for MEM_OP
KVM: s390: selftests: Split memop tests
KVM: s390x: fix SCK locking
RISC-V: KVM: Implement SBI HSM suspend call
RISC-V: KVM: Add common kvm_riscv_vcpu_wfi() function
RISC-V: Add SBI HSM suspend related defines
RISC-V: KVM: Implement SBI v0.3 SRST extension
...
|
||
Guilherme G. Piccoli
|
f953f140f3 |
panic: move panic_print before kmsg dumpers
The panic_print setting allows users to collect more information in a
panic event, like memory stats, tasks, CPUs backtraces, etc. This is an
interesting debug mechanism, but currently the print event happens *after*
kmsg_dump(), meaning that pstore, for example, cannot collect a dmesg with
the panic_print extra information.
This patch changes that in 2 steps:
(a) The panic_print setting allows to replay the existing kernel log
buffer to the console (bit 5), besides the extra information dump.
This functionality makes sense only at the end of the panic()
function. So, we hereby allow to distinguish the two situations by a
new boolean parameter in the function panic_print_sys_info().
(b) With the above change, we can safely call panic_print_sys_info()
before kmsg_dump(), allowing to dump the extra information when using
pstore or other kmsg dumpers.
The additional messages from panic_print could overwrite the oldest
messages when the buffer is full. The only reasonable solution is to use
a large enough log buffer, hence we added an advice into the kernel
parameters documentation about that.
Link: https://lkml.kernel.org/r/20220214141308.841525-1-gpiccoli@igalia.com
Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
Acked-by: Baoquan He <bhe@redhat.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Feng Tang <feng.tang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
||
|
Guilherme G. Piccoli
|
8d470a45d1 |
panic: add option to dump all CPUs backtraces in panic_print
Currently the "panic_print" parameter/sysctl allows some interesting debug information to be printed during a panic event. This is useful for example in cases the user cannot kdump due to resource limits, or if the user collects panic logs in a serial output (or pstore) and prefers a fast reboot instead of a kdump. Happens that currently there's no way to see all CPUs backtraces in a panic using "panic_print" on architectures that support that. We do have "oops_all_cpu_backtrace" sysctl, but although partially overlapping in the functionality, they are orthogonal in nature: "panic_print" is a panic tuning (and we have panics without oopses, like direct calls to panic() or maybe other paths that don't go through oops_enter() function), and the original purpose of "oops_all_cpu_backtrace" is to provide more information on oopses for cases in which the users desire to continue running the kernel even after an oops, i.e., used in non-panic scenarios. So, we hereby introduce an additional bit for "panic_print" to allow dumping the CPUs backtraces during a panic event. Link: https://lkml.kernel.org/r/20211109202848.610874-3-gpiccoli@igalia.com Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com> Reviewed-by: Feng Tang <feng.tang@intel.com> Cc: Iurii Zaikin <yzaikin@google.com> Cc: Kees Cook <keescook@chromium.org> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Linus Torvalds
|
1bc191051d |
Tracing updates for 5.18:
- New user_events interface. User space can register an event with the kernel describing the format of the event. Then it will receive a byte in a page mapping that it can check against. A privileged task can then enable that event like any other event, which will change the mapped byte to true, telling the user space application to start writing the event to the tracing buffer. - Add new "ftrace_boot_snapshot" kernel command line parameter. When set, the tracing buffer will be saved in the snapshot buffer at boot up when the kernel hands things over to user space. This will keep the traces that happened at boot up available even if user space boot up has tracing as well. - Have TRACE_EVENT_ENUM() also update trace event field type descriptions. Thus if a static array defines its size with an enum, the user space trace event parsers can still know how to parse that array. - Add new TRACE_CUSTOM_EVENT() macro. This acts the same as the TRACE_EVENT() macro, but will attach to an existing tracepoint. This will make one tracepoint be able to trace different content and not be stuck at only what the original TRACE_EVENT() macro exports. - Fixes to tracing error logging. - Better saving of cmdlines to PIDs when tracing (use the wakeup events for mapping). -----BEGIN PGP SIGNATURE----- iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCYjiO3RQccm9zdGVkdEBn b29kbWlzLm9yZwAKCRAp5XQQmuv6qhQzAQDtek5p80p/zkMGymm14wSH6qq0NdgN Kv7fTBwEewUa0gD/UCOVLw4Oj+JtHQhCa3sCGZopmRv0BT1+4UQANqosKQY= =Au08 -----END PGP SIGNATURE----- Merge tag 'trace-v5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing updates from Steven Rostedt: - New user_events interface. User space can register an event with the kernel describing the format of the event. Then it will receive a byte in a page mapping that it can check against. A privileged task can then enable that event like any other event, which will change the mapped byte to true, telling the user space application to start writing the event to the tracing buffer. - Add new "ftrace_boot_snapshot" kernel command line parameter. When set, the tracing buffer will be saved in the snapshot buffer at boot up when the kernel hands things over to user space. This will keep the traces that happened at boot up available even if user space boot up has tracing as well. - Have TRACE_EVENT_ENUM() also update trace event field type descriptions. Thus if a static array defines its size with an enum, the user space trace event parsers can still know how to parse that array. - Add new TRACE_CUSTOM_EVENT() macro. This acts the same as the TRACE_EVENT() macro, but will attach to an existing tracepoint. This will make one tracepoint be able to trace different content and not be stuck at only what the original TRACE_EVENT() macro exports. - Fixes to tracing error logging. - Better saving of cmdlines to PIDs when tracing (use the wakeup events for mapping). * tag 'trace-v5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (30 commits) tracing: Have type enum modifications copy the strings user_events: Add trace event call as root for low permission cases tracing/user_events: Use alloc_pages instead of kzalloc() for register pages tracing: Add snapshot at end of kernel boot up tracing: Have TRACE_DEFINE_ENUM affect trace event types as well tracing: Fix strncpy warning in trace_events_synth.c user_events: Prevent dyn_event delete racing with ioctl add/delete tracing: Add TRACE_CUSTOM_EVENT() macro tracing: Move the defines to create TRACE_EVENTS into their own files tracing: Add sample code for custom trace events tracing: Allow custom events to be added to the tracefs directory tracing: Fix last_cmd_set() string management in histogram code user_events: Fix potential uninitialized pointer while parsing field tracing: Fix allocation of last_cmd in last_cmd_set() user_events: Add documentation file user_events: Add sample code for typical usage user_events: Add self-test for validator boundaries user_events: Add self-test for perf_event integration user_events: Add self-test for dynamic_events integration user_events: Add self-test for ftrace integration ... |
||
|
Linus Torvalds
|
3ef4ea3d84 |
printk changes for 5.18
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEESH4wyp42V4tXvYsjUqAMR0iAlPIFAmI4ggsACgkQUqAMR0iA lPLrlA//R12HGCGSzdpdyynl+5wByIqcHe8RANHOAj9f9qxBtmYv2ZK69mzSvhHO 6kAGdb3vBtxo1NCHeqxlXpds9GP/zOGEWmEJP2P7pIZ8ci8QtwrXCtQ8XIW9UGhJ WHzXpXkfzcIDsRZs6B1pxN5cRXuW2VVzfgxyu6L+hvNV0o0PPO4A48ptzNBZh8rj URAid+n/aGs9SOXM0h8SRjjBYEqjiB2RZ3gLg5XGZmcATtitBO135LGZnBR2fwnX RZKckbdA/fBzqS4Njsp2rV5Rqldwj7mHzQbcsQm4YDrxSdl8d78XxQdAA5sNyaCD ToDw6/DeegXzgtPJpuBH/ymF9RczIu4l3eawO1FBMCB5EPq56zVHWErxry8qaTgi yQFqhBgifNN5NqfQCn7dyF10usmsvImFczre7ZxJvL7vmzqDsYYqdZG5oouLudR4 iOphFwX71v4X+RsxbOXqEt+mS3AwqEJc1SZl5rrDc4TSUOE1qCd+ncLTAuAf3Wfm 1xaZ+siomahcZAKrgmSw6AcD5bU+JJpr6FktKAddiO7J1+nIdT1lYEbpUsfWZ/p8 Kx8A2M2ula+whJ6CgtnGTsbsacsFi+j/MioMTGZIU+Fubkig3XEeIp3QUO6sEN+9 /sUQ6Wj6c95miWdttff9o6ap8py9NbfuKIw/HMOesfLVKP82rmw= =EUpJ -----END PGP SIGNATURE----- Merge tag 'printk-for-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux Pull printk updates from Petr Mladek: - Make %pK behave the same as %p for kptr_restrict == 0 also with no_hash_pointers parameter - Ignore the default console in the device tree also when console=null or console="" is used on the command line - Document console=null and console="" behavior - Prevent a deadlock and a livelock caused by console_lock in panic() - Make console_lock available for panicking CPU - Fast query for the next to-be-used sequence number - Use the expected return values in printk.devkmsg __setup handler - Use the correct atomic operations in wake_up_klogd() irq_work handler - Avoid possible unaligned access when handling %4cc printing format * tag 'printk-for-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux: printk: fix return value of printk.devkmsg __setup handler vsprintf: Fix %pK with kptr_restrict == 0 printk: make suppress_panic_printk static printk: Set console_set_on_cmdline=1 when __add_preferred_console() is called with user_specified == true Docs: printk: add 'console=null|""' to admin/kernel-parameters printk: use atomic updates for klogd work printk: Drop console_sem during panic printk: Avoid livelock with heavy printk during panic printk: disable optimistic spin during panic printk: Add panic_in_progress helper vsprintf: Move space out of string literals in fourcc_string() vsprintf: Fix potential unaligned access printk: ringbuffer: Improve prb_next_seq() performance |
||
|
Linus Torvalds
|
3bf03b9a08 |
Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton:
- A few misc subsystems: kthread, scripts, ntfs, ocfs2, block, and vfs
- Most the MM patches which precede the patches in Willy's tree: kasan,
pagecache, gup, swap, shmem, memcg, selftests, pagemap, mremap,
sparsemem, vmalloc, pagealloc, memory-failure, mlock, hugetlb,
userfaultfd, vmscan, compaction, mempolicy, oom-kill, migration, thp,
cma, autonuma, psi, ksm, page-poison, madvise, memory-hotplug, rmap,
zswap, uaccess, ioremap, highmem, cleanups, kfence, hmm, and damon.
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (227 commits)
mm/damon/sysfs: remove repeat container_of() in damon_sysfs_kdamond_release()
Docs/ABI/testing: add DAMON sysfs interface ABI document
Docs/admin-guide/mm/damon/usage: document DAMON sysfs interface
selftests/damon: add a test for DAMON sysfs interface
mm/damon/sysfs: support DAMOS stats
mm/damon/sysfs: support DAMOS watermarks
mm/damon/sysfs: support schemes prioritization
mm/damon/sysfs: support DAMOS quotas
mm/damon/sysfs: support DAMON-based Operation Schemes
mm/damon/sysfs: support the physical address space monitoring
mm/damon/sysfs: link DAMON for virtual address spaces monitoring
mm/damon: implement a minimal stub for sysfs-based DAMON interface
mm/damon/core: add number of each enum type values
mm/damon/core: allow non-exclusive DAMON start/stop
Docs/damon: update outdated term 'regions update interval'
Docs/vm/damon/design: update DAMON-Idle Page Tracking interference handling
Docs/vm/damon: call low level monitoring primitives the operations
mm/damon: remove unnecessary CONFIG_DAMON option
mm/damon/paddr,vaddr: remove damon_{p,v}a_{target_valid,set_operations}()
mm/damon/dbgfs-test: fix is_target_id() change
...
|
||
|
Muchun Song
|
e7d324850b |
mm: hugetlb: free the 2nd vmemmap page associated with each HugeTLB page
Patch series "Free the 2nd vmemmap page associated with each HugeTLB
page", v7.
This series can minimize the overhead of struct page for 2MB HugeTLB
pages significantly. It further reduces the overhead of struct page by
12.5% for a 2MB HugeTLB compared to the previous approach, which means
2GB per 1TB HugeTLB. It is a nice gain. Comments and reviews are
welcome. Thanks.
The main implementation and details can refer to the commit log of patch
1. In this series, I have changed the following four helpers, the
following table shows the impact of the overhead of those helpers.
+------------------+-----------------------+
| APIs | head page | tail page |
+------------------+-----------+-----------+
| PageHead() | Y | N |
+------------------+-----------+-----------+
| PageTail() | Y | N |
+------------------+-----------+-----------+
| PageCompound() | N | N |
+------------------+-----------+-----------+
| compound_head() | Y | N |
+------------------+-----------+-----------+
Y: Overhead is increased.
N: Overhead is _NOT_ increased.
It shows that the overhead of those helpers on a tail page don't change
between "hugetlb_free_vmemmap=on" and "hugetlb_free_vmemmap=off". But the
overhead on a head page will be increased when "hugetlb_free_vmemmap=on"
(except PageCompound()). So I believe that Matthew Wilcox's folio series
will help with this.
The users of PageHead() and PageTail() are much less than compound_head()
and most users of PageTail() are VM_BUG_ON(), so I have done some tests
about the overhead of compound_head() on head pages.
I have tested the overhead of calling compound_head() on a head page,
which is 2.11ns (Measure the call time of 10 million times
compound_head(), and then average).
For a head page whose address is not aligned with PAGE_SIZE or a
non-compound page, the overhead of compound_head() is 2.54ns which is
increased by 20%. For a head page whose address is aligned with
PAGE_SIZE, the overhead of compound_head() is 2.97ns which is increased by
40%. Most pages are the former. I do not think the overhead is
significant since the overhead of compound_head() itself is low.
This patch (of 5):
This patch minimizes the overhead of struct page for 2MB HugeTLB pages
significantly. It further reduces the overhead of struct page by 12.5%
for a 2MB HugeTLB compared to the previous approach, which means 2GB per
1TB HugeTLB (2MB type).
After the feature of "Free sonme vmemmap pages of HugeTLB page" is
enabled, the mapping of the vmemmap addresses associated with a 2MB
HugeTLB page becomes the figure below.
HugeTLB struct pages(8 pages) page frame(8 pages)
+-----------+ ---virt_to_page---> +-----------+ mapping to +-----------+---> PG_head
| | | 0 | -------------> | 0 |
| | +-----------+ +-----------+
| | | 1 | -------------> | 1 |
| | +-----------+ +-----------+
| | | 2 | ----------------^ ^ ^ ^ ^ ^
| | +-----------+ | | | | |
| | | 3 | ------------------+ | | | |
| | +-----------+ | | | |
| | | 4 | --------------------+ | | |
| 2MB | +-----------+ | | |
| | | 5 | ----------------------+ | |
| | +-----------+ | |
| | | 6 | ------------------------+ |
| | +-----------+ |
| | | 7 | --------------------------+
| | +-----------+
| |
| |
| |
+-----------+
As we can see, the 2nd vmemmap page frame (indexed by 1) is reused and
remaped. However, the 2nd vmemmap page frame is also can be freed to
the buddy allocator, then we can change the mapping from the figure
above to the figure below.
HugeTLB struct pages(8 pages) page frame(8 pages)
+-----------+ ---virt_to_page---> +-----------+ mapping to +-----------+---> PG_head
| | | 0 | -------------> | 0 |
| | +-----------+ +-----------+
| | | 1 | ---------------^ ^ ^ ^ ^ ^ ^
| | +-----------+ | | | | | |
| | | 2 | -----------------+ | | | | |
| | +-----------+ | | | | |
| | | 3 | -------------------+ | | | |
| | +-----------+ | | | |
| | | 4 | ---------------------+ | | |
| 2MB | +-----------+ | | |
| | | 5 | -----------------------+ | |
| | +-----------+ | |
| | | 6 | -------------------------+ |
| | +-----------+ |
| | | 7 | ---------------------------+
| | +-----------+
| |
| |
| |
+-----------+
After we do this, all tail vmemmap pages (1-7) are mapped to the head
vmemmap page frame (0). In other words, there are more than one page
struct with PG_head associated with each HugeTLB page. We __know__ that
there is only one head page struct, the tail page structs with PG_head are
fake head page structs. We need an approach to distinguish between those
two different types of page structs so that compound_head(), PageHead()
and PageTail() can work properly if the parameter is the tail page struct
but with PG_head.
The following code snippet describes how to distinguish between real and
fake head page struct.
if (test_bit(PG_head, &page->flags)) {
unsigned long head = READ_ONCE(page[1].compound_head);
if (head & 1) {
if (head == (unsigned long)page + 1)
==> head page struct
else
==> tail page struct
} else
==> head page struct
}
We can safely access the field of the @page[1] with PG_head because the
@page is a compound page composed with at least two contiguous pages.
[songmuchun@bytedance.com: restore lost comment changes]
Link: https://lkml.kernel.org/r/20211101031651.75851-1-songmuchun@bytedance.com
Link: https://lkml.kernel.org/r/20211101031651.75851-2-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Barry Song <song.bao.hua@hisilicon.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Chen Huang <chenhuang5@huawei.com>
Cc: Bodeddula Balasubramaniam <bodeddub@amazon.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Xiongchun Duan <duanxiongchun@bytedance.com>
Cc: Fam Zheng <fam.zheng@bytedance.com>
Cc: Qi Zheng <zhengqi.arch@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
||
|
Linus Torvalds
|
fd27687791 |
hwmon updates for v5.18
New drivers
- Driver for Texas Instruments TMP464 and TMP468
- Driver for Vicor PLI1209BC Digital Supervisor
- Driver for ASUS EC
Improvements to existing drivers:
- adt7x10: Convert to use regmap, convert to use with_info API,
use hwmon_notify_event, and other cleanup
- aquacomputer_d5next: Add support for Aquacomputer Farbwerk 360
- asus_wmi_sensors: Add ASUS ROG STRIX B450-F GAMING II
- asus_wmi_ec_sensors: Support T_Sensor on Prime X570-Pro
Deprecate driver (replaced by new driver)
- axi-fan-control: Use hwmon_notify_event
- dell-smm: Clean up CONFIG_I8K, disable fan type support for
Inspiron 3505, various other cleanup
- hwmon core: Report attribute name with udev events,
Add "label" attribute to ABI,
Add support for pwm auto channels attribute
- max6639: Add regulator support
- lm70: Add support for TI TMP125
- lm83: Cleanup, convert to use with_info API
- mlxreg-fan: Use pwm attribute for setting fan speed low limit
- nct6775: Sdd ASUS ROG STRIX Z390/Z490/X570-* / PRIME X570-P,
PRIME B550-PLUS, ASUS Pro B550M-C/PRIME B550M-A,
and support for TSI temperature registers
- occ: Add various new sysfs attributes
- pmbus core: Handle VIN unit off status,
Add regulator supply into macro,
Add get_error_flags support to regulator ops
- pmbus/adm1275: Allow setting sample averaging
- pmbus/lm25066: Add regulator support
- pmbus/xdpe12284: Add support for xdpe11280 and register as regulator
- powr1220: Convert to with_info API,
Add support for Lattice's POWR1014 power manager IC
- sch56xx: Cleanup and minor improvements
- sch5627: Add pwmX_auto_channels_temp support
- tc654: Add thermal_cooling device support
-----BEGIN PGP SIGNATURE-----
iQIzBAABCAAdFiEEiHPvMQj9QTOCiqgVyx8mb86fmYEFAmI3tLEACgkQyx8mb86f
mYGztw//T9YdVs+oBImLAF2Q3NXzvCNWSdO7ZUzaxUTDw60lGHZpjMYNt/m+k3j/
vdjVFpyyvJW0D1iDxHd5EIO7IVhSsd01VYlSCMELF2NYug12XzAAofzbGsEJih65
DISIsPp1h+Ddc6XQsuuh7A3etDQhPu+YWnuIpSgEI33wK5+U7zxl5CIR9o5asfmf
ZkGjQoN5DjYxqB4MpdTisHz7JC8YAxdXk2ZxqFlZ8yoptB7kLMjbhIFx/PGwI1Os
TEoVEcp8n4KnirVpwwx5wFustX0Abd4Radm9iUTrRhJHHYsVP5RVwYpfs3FhgccW
k69wJ32Hx2fyRWT6/wo88+VJ/T1hPSTB1wMRHDLmJJzLBZsXIfFcf7Hxr/A+N0/U
D88JtWvu2GyJQt5k54IU1RwvN0cBz6J0X3PE7nldaR7lAE1tqF98KC57Esr0vtYu
TLxz/ISBva9mwwWH6Gar1X+kiODhTiHQRTDWhl6vIbAUCcpTjMyNxppAxSFNciGU
S7LDvuPY10S3DHJ0sqLVeANgF5Q/GLBGMI3iamVD08U8dgcEsrycUzs98LAYONyi
d3+3AUUl60OAWlrk43OOLzYllGrCy3OhKNWzmVXbM8Ue9Fb1cet7UD2fAg8WlOVX
kXhtNdXkPk//65NVIikI8owMcQg6iC+zFESPkFlaXQfnhA6KyqQ=
=4u33
-----END PGP SIGNATURE-----
Merge tag 'hwmon-for-v5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon updates from Guenter Roeck:
"New drivers:
- Texas Instruments TMP464 and TMP468 driver
- Vicor PLI1209BC Digital Supervisor driver
- ASUS EC driver
Improvements to existing drivers:
- adt7x10:
- Convert to use regmap
- convert to use with_info API
- use hwmon_notify_event
- other cleanup
- aquacomputer_d5next:
- Add support for Aquacomputer Farbwerk 360
- asus_wmi_sensors:
- Add ASUS ROG STRIX B450-F GAMING II
- asus_wmi_ec_sensors:
- Support T_Sensor on Prime X570-Pro
- Deprecate driver (replaced by new driver)
- axi-fan-control:
- Use hwmon_notify_event
- dell-smm:
- Clean up CONFIG_I8K
- disable fan type support for Inspiron 3505
- various other cleanup
- hwmon core:
- Report attribute name with udev events
- Add "label" attribute to ABI,
- Add support for pwm auto channels attribute
- max6639:
- Add regulator support
- lm70:
- Add support for TI TMP125
- lm83:
- Cleanup, convert to use with_info API
- mlxreg-fan:
- Use pwm attribute for setting fan speed low limit
- nct6775:
- Add board ID's for ASUS ROG STRIX Z390/Z490/X570-* / PRIME
X570-P, PRIME B550-PLUS, ASUS Pro B550M-C/PRIME B550M-A
- Add support for TSI temperature registers
- occ:
- Add various new sysfs attributes
- pmbus core:
- Handle VIN unit off status
- Add regulator supply into macro
- Add get_error_flags support to regulator ops
- pmbus/adm1275:
- Allow setting sample averaging
- pmbus/lm25066:
- Add regulator support
- pmbus/xdpe12284:
- Add support for xdpe11280
- register as regulator
- powr1220:
- Convert to with_info API
- Add support for Lattice's POWR1014 power manager IC
- sch56xx:
- Cleanup and minor improvements
- sch5627:
- Add pwmX_auto_channels_temp support
- tc654:
- Add thermal_cooling device support"
* tag 'hwmon-for-v5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (86 commits)
hwmon: (dell-smm) Add Inspiron 3505 to fan type blacklist
hwmon: (pmbus) Add Vin unit off handling
hwmon: (scpi-hwmon): Use of_device_get_match_data()
hwmon: (axi-fan-control) Use hwmon_notify_event
hwmon: (vexpress-hwmon) Use of_device_get_match_data()
hwmon: Add driver for Texas Instruments TMP464 and TMP468
dt-bindings: hwmon: add tmp464.yaml
dt-bindings: hwmon: Add sample averaging properties for ADM1275
hwmon: (adm1275) Allow setting sample averaging
hwmon: (xdpe12284) Add regulator support
hwmon: (xdpe12284) Add support for xdpe11280
dt-bindings: trivial-devices: Add xdpe11280
hwmon: (aquacomputer_d5next) Add support for Aquacomputer Farbwerk 360
hwmon: (sch5627) Add pwmX_auto_channels_temp support
hwmon: (core) Add support for pwm auto channels attribute
hwmon: (lm70) Add ti,tmp125 support
dt-bindings: Add ti,tmp125 temperature sensor binding
hwmon: (pmbus/pli1209bc) Add regulator support
hwmon: (pmbus) Add support for pli1209bc
dt-bindings:trivial-devices: Add pli1209bc
...
|
||
|
Linus Torvalds
|
346658a5e1 |
It has been a moderately busy cycle for documentation; some of the
highlights are:
- Numerous PDF-generation improvements
- Kees's new document with guidelines for researchers studying the
development community.
- The ongoing stream of Chinese translations
- Thorsten's new document on regression handling
- A major reworking of the internal documentation for the kernel-doc
script.
Plus the usual stream of typo fixes and such.
-----BEGIN PGP SIGNATURE-----
iQFDBAABCAAtFiEEIw+MvkEiF49krdp9F0NaE2wMflgFAmI4puIPHGNvcmJldEBs
d24ubmV0AAoJEBdDWhNsDH5YUnoH/RubGxsXMBcpVk0szSN/c8VEhp+QxnL6Q8NV
BtOySou5lu204awb285m4HPvuVSViHKoDObFK3fYZUjCHP8rrSymnBV8N0E0pCYm
QAgUtNcGqFk41uEkr1v4wmGCj3hIvklycOtBAite4NulHoUzpMsssf6YbajZRIt9
/PyX30jC3dVPDCZ33lYIzJRdilhoKlS5r/x2Fk/c9uOLGCsJDufHlI6PB+RA7Gpf
6kDMriIKmEU9Pq2P+Gl+tVPnrQYSSxVP8QUweObQQll2Wq/tQR/1YtecAg0RvG+g
qc3ciEpVnNHRzSP1XY6Um1FyE338cBtZckdUMgVZ+5vY0300ooA=
=wRYm
-----END PGP SIGNATURE-----
Merge tag 'docs-5.18' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet:
"It has been a moderately busy cycle for documentation; some of the
highlights are:
- Numerous PDF-generation improvements
- Kees's new document with guidelines for researchers studying the
development community.
- The ongoing stream of Chinese translations
- Thorsten's new document on regression handling
- A major reworking of the internal documentation for the kernel-doc
script.
Plus the usual stream of typo fixes and such"
* tag 'docs-5.18' of git://git.lwn.net/linux: (80 commits)
docs/kernel-parameters: update description of mem=
docs/zh_CN: Add sched-nice-design Chinese translation
docs: scheduler: Convert schedutil.txt to ReST
Docs: ktap: add code-block type
docs: serial: fix a reference file name in driver.rst
docs: UML: Mention telnetd for port channel
docs/zh_CN: add damon reclaim translation
docs/zh_CN: add damon usage translation
docs/zh_CN: add admin-guide damon start translation
docs/zh_CN: add admin-guide damon index translation
docs/zh_CN: Refactoring the admin-guide directory index
zh_CN: Add translation for admin-guide/mm/index.rst
zh_CN: Add translations for admin-guide/mm/ksm.rst
Add Chinese translation for vm/ksm.rst
docs/zh_CN: Add sched-stats Chinese translation
docs/zh_CN: add devicetree of_unittest translation
docs/zh_CN: add devicetree usage-model translation
docs/zh_CN: add devicetree index translation
Documentation: describe how to apply incremental stable patches
docs/zh_CN: add peci subsystem translation
...
|
||
|
Linus Torvalds
|
35dc0352bb |
RCU pull request for v5.18
This pull request contains the following branches: exp.2022.02.24a: Contains a fix for idle detection from Neeraj Upadhyay and missing access marking detected by KCSAN. fixes.2022.02.14a: Miscellaneous fixes. rcu_barrier.2022.02.08a: Reduces coupling between rcu_barrier() and CPU-hotplug operations, so that rcu_barrier() no longer needs to do cpus_read_lock(). This may also someday allow system boot to bring CPUs online concurrently. rcu-tasks.2022.02.08a: Enable more aggressive movement to per-CPU queueing when reacting to excessive lock contention due to workloads placing heavy update-side stress on RCU tasks. rt.2022.02.01b: Improvements to RCU priority boosting, including changes from Neeraj Upadhyay, Zqiang, and Alison Chaiken. torture.2022.02.01b: Various fixes improving test robustness and debug information. torturescript.2022.02.08a: Add tests for SRCU size transitions, further compress torture.sh build products, and improve debug output. -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEbK7UrM+RBIrCoViJnr8S83LZ+4wFAmIusb0THHBhdWxtY2tA a2VybmVsLm9yZwAKCRCevxLzctn7jAklD/9VXLK7crcg2YeRXUIg1IOdnancsVCV MNtTfxNYqYIis+W2UfuHKuQu2yEXF5fihdY0J9TQv0byHsprp6FIZT+i1An4Ukgd 0vyHjd/DaIKgs2txsB1DjhlatWlJUfQuBwhtNUkpYFLFwKdCI1l813bPbNlL+GiL p0ZejVMpBC5HgE6sDOtaaQSAB+AEUp+Lgr+yaG/On8hfzwWFKO8KldxhiKY9n07v SNDfKDgXB+80hx4RBVGbkuogV3s9brFULoNRXJy7Uf79DtiY09uazhhA3G0TjO34 zGwmF91dqsXDF/Uz8g4aZO0xYRXUchOrsQ5lgO/GhTVbM9I0wWlMHEk/8WHyBJkU vlXOMuwzBc9/5uwZE3rnkA4a3nkXhPQjLlCr+/I7A/7Vsv9IBW9WSlgMvUN0Qf4S XAwTnIqfErnR60a+L0+HRr5kIV5VoXcxqI/Nv0/4/BMLRubS/c7cYjOTxXNJL9SU 50pv5vty9xk3HSpuz0JAOyLf+PUT773uUQhFr5xCBSCVqbAm5WFg6hWPAgrN/tUS wstBc0wlA73rKVJxeLDQwHc/oT1zTUEzswVZITQ5zLHK0t0GbeR6QHccsdeaJyTe DisX+66A6YQrEuJmx5xUZqjYHqtYLDOBTbHA3ZwQmvjKu8ibWZ8Fg9ioURLCS4bF +FVkp/5KdcAN9w== =ljVY -----END PGP SIGNATURE----- Merge tag 'rcu.2022.03.13a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu Pull RCU updates from Paul McKenney: - Fix idle detection (Neeraj Upadhyay) and missing access marking detected by KCSAN. - Reduce coupling between rcu_barrier() and CPU-hotplug operations, so that rcu_barrier() no longer needs to do cpus_read_lock(). This may also someday allow system boot to bring CPUs online concurrently. - Enable more aggressive movement to per-CPU queueing when reacting to excessive lock contention due to workloads placing heavy update-side stress on RCU tasks. - Improvements to RCU priority boosting, including changes from Neeraj Upadhyay, Zqiang, and Alison Chaiken. - Various fixes improving test robustness and debug information. - Add tests for SRCU size transitions, further compress torture.sh build products, and improve debug output. - Miscellaneous fixes. * tag 'rcu.2022.03.13a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: (49 commits) rcu: Replace cpumask_weight with cpumask_empty where appropriate rcu: Remove __read_mostly annotations from rcu_scheduler_active externs rcu: Uninline multi-use function: finish_rcuwait() rcu: Mark writes to the rcu_segcblist structure's ->flags field kasan: Record work creation stack trace with interrupts enabled rcu: Inline __call_rcu() into call_rcu() rcu: Add mutex for rcu boost kthread spawning and affinity setting rcu: Fix description of kvfree_rcu() MAINTAINERS: Add Frederic and Neeraj to their RCU files rcutorture: Provide non-power-of-two Tasks RCU scenarios rcutorture: Test SRCU size transitions torture: Make torture.sh help message match reality rcu-tasks: Set ->percpu_enqueue_shift to zero upon contention rcu-tasks: Use order_base_2() instead of ilog2() rcu: Create and use an rcu_rdp_cpu_online() rcu: Make rcu_barrier() no longer block CPU-hotplug operations rcu: Rework rcu_barrier() and callback-migration logic rcu: Refactor rcu_barrier() empty-list handling rcu: Kill rnp->ofl_seq and use only rcu_state.ofl_lock for exclusion torture: Change KVM environment variable to RCUTORTURE ... |
||
|
Mike Rapoport
|
75c05fabb8 |
docs/kernel-parameters: update description of mem=
The existing description of mem= does not cover all the cases and differences between how architectures treat it. Extend the description to match the code. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Link: https://lore.kernel.org/r/20220310082736.1346366-1-rppt@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
||
Steven Rostedt (Google)
|
380af29b8d |
tracing: Add snapshot at end of kernel boot up
Add ftrace_boot_snapshot kernel parameter that will take a snapshot at the end of boot up just before switching over to user space (it happens during the kernel freeing of init memory). This is useful when there's interesting data that can be collected from kernel start up, but gets overridden by user space start up code. With this option, the ring buffer content from the boot up traces gets saved in the snapshot at the end of boot up. This trace can be read from: /sys/kernel/tracing/snapshot Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> |
||
Armin Wolf
|
99fdc5875b |
Documentation: admin-guide: Add Documentation for undocumented dell_smm_hwmon parameters
Add documentation for fan_mult and fan_max. Signed-off-by: Armin Wolf <W_Armin@gmx.de> Link: https://lore.kernel.org/r/20220109214248.61759-3-W_Armin@gmx.de Signed-off-by: Guenter Roeck <linux@roeck-us.net> |
||
|
Armin Wolf
|
1b089084ec |
Documentation: admin-guide: Update i8k driver name
The driver should be called dell_smm_hwmon, i8k is only an alias now. Signed-off-by: Armin Wolf <W_Armin@gmx.de> Acked-by: Randy Dunlap <rdunlap@infradead.org> Link: https://lore.kernel.org/r/20220109214248.61759-2-W_Armin@gmx.de Signed-off-by: Guenter Roeck <linux@roeck-us.net> |
||
|
Christophe Leroy
|
8484291132 |
vsprintf: Fix %pK with kptr_restrict == 0
Although kptr_restrict is set to 0 and the kernel is booted with
no_hash_pointers parameter, the content of /proc/vmallocinfo is
lacking the real addresses.
/ # cat /proc/vmallocinfo
0x(ptrval)-0x(ptrval) 8192 load_module+0xc0c/0x2c0c pages=1 vmalloc
0x(ptrval)-0x(ptrval) 12288 start_kernel+0x4e0/0x690 pages=2 vmalloc
0x(ptrval)-0x(ptrval) 12288 start_kernel+0x4e0/0x690 pages=2 vmalloc
0x(ptrval)-0x(ptrval) 8192 _mpic_map_mmio.constprop.0+0x20/0x44 phys=0x80041000 ioremap
0x(ptrval)-0x(ptrval) 12288 _mpic_map_mmio.constprop.0+0x20/0x44 phys=0x80041000 ioremap
...
According to the documentation for /proc/sys/kernel/, %pK is
equivalent to %p when kptr_restrict is set to 0.
Fixes:
|
||
|
Randy Dunlap
|
96b02f2fbd |
Docs: printk: add 'console=null|""' to admin/kernel-parameters
Tell about 'console=null|""' and how to use it.
It can be helpful to set (enable) CONFIG_NULL_TTY so that the ttynull
driver is available. This avoids problems with stdin/stdout/stderr of
the init process. Howevere, CONFIG_NULL_TTY cannot be enabled by default
because it can be used by mistake, see the commit
|
||
|
Peter Zijlstra
|
5ad3eb1132 |
Documentation/hw-vuln: Update spectre doc
Update the doc with the new fun. [ bp: Massage commit message. ] Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> |
||
Sean Christopherson
|
1bbc60d0c7 |
KVM: x86/mmu: Remove MMU auditing
Remove mmu_audit.c and all its collateral, the auditing code has suffered severe bitrot, ironically partly due to shadow paging being more stable and thus not benefiting as much from auditing, but mostly due to TDP supplanting shadow paging for non-nested guests and shadowing of nested TDP not heavily stressing the logic that is being audited. Signed-off-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
||
|
David Matlack
|
cb00a70bd4 |
KVM: x86/mmu: Split huge pages mapped by the TDP MMU during KVM_CLEAR_DIRTY_LOG
When using KVM_DIRTY_LOG_INITIALLY_SET, huge pages are not write-protected when dirty logging is enabled on the memslot. Instead they are write-protected once userspace invokes KVM_CLEAR_DIRTY_LOG for the first time and only for the specific sub-region being cleared. Enhance KVM_CLEAR_DIRTY_LOG to also try to split huge pages prior to write-protecting to avoid causing write-protection faults on vCPU threads. This also allows userspace to smear the cost of huge page splitting across multiple ioctls, rather than splitting the entire memslot as is the case when initially-all-set is not used. Signed-off-by: David Matlack <dmatlack@google.com> Message-Id: <20220119230739.2234394-17-dmatlack@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
||
|
David Matlack
|
a3fe5dbda0 |
KVM: x86/mmu: Split huge pages mapped by the TDP MMU when dirty logging is enabled
When dirty logging is enabled without initially-all-set, try to split
all huge pages in the memslot down to 4KB pages so that vCPUs do not
have to take expensive write-protection faults to split huge pages.
Eager page splitting is best-effort only. This commit only adds the
support for the TDP MMU, and even there splitting may fail due to out
of memory conditions. Failures to split a huge page is fine from a
correctness standpoint because KVM will always follow up splitting by
write-protecting any remaining huge pages.
Eager page splitting moves the cost of splitting huge pages off of the
vCPU threads and onto the thread enabling dirty logging on the memslot.
This is useful because:
1. Splitting on the vCPU thread interrupts vCPUs execution and is
disruptive to customers whereas splitting on VM ioctl threads can
run in parallel with vCPU execution.
2. Splitting all huge pages at once is more efficient because it does
not require performing VM-exit handling or walking the page table for
every 4KiB page in the memslot, and greatly reduces the amount of
contention on the mmu_lock.
For example, when running dirty_log_perf_test with 96 virtual CPUs, 1GiB
per vCPU, and 1GiB HugeTLB memory, the time it takes vCPUs to write to
all of their memory after dirty logging is enabled decreased by 95% from
2.94s to 0.14s.
Eager Page Splitting is over 100x more efficient than the current
implementation of splitting on fault under the read lock. For example,
taking the same workload as above, Eager Page Splitting reduced the CPU
required to split all huge pages from ~270 CPU-seconds ((2.94s - 0.14s)
* 96 vCPU threads) to only 1.55 CPU-seconds.
Eager page splitting does increase the amount of time it takes to enable
dirty logging since it has split all huge pages. For example, the time
it took to enable dirty logging in the 96GiB region of the
aforementioned test increased from 0.001s to 1.55s.
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20220119230739.2234394-16-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
|
||
Alison Chaiken
|
a469948b20 |
rcu: Update documentation regarding kthread_prio cmdline parameter
Inform readers that the priority of RCU no-callback threads will also be boosted. Signed-off-by: Alison Chaiken <achaiken@aurora.tech> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
||
|
Linus Torvalds
|
29ec39fcf1 |
powerpc updates for 5.17
- Optimise radix KVM guest entry/exit by 2x on Power9/Power10.
- Allow firmware to tell us whether to disable the entry and uaccess flushes on Power10
or later CPUs.
- Add BPF_PROBE_MEM support for 32 and 64-bit BPF jits.
- Several fixes and improvements to our hard lockup watchdog.
- Activate HAVE_DYNAMIC_FTRACE_WITH_REGS on 32-bit.
- Allow building the 64-bit Book3S kernel without hash MMU support, ie. Radix only.
- Add KUAP (SMAP) support for 40x, 44x, 8xx, Book3E (64-bit).
- Add new encodings for perf_mem_data_src.mem_hops field, and use them on Power10.
- A series of small performance improvements to 64-bit interrupt entry.
- Several commits fixing issues when building with the clang integrated assembler.
- Many other small features and fixes.
Thanks to: Alan Modra, Alexey Kardashevskiy, Ammar Faizi, Anders Roxell, Arnd Bergmann,
Athira Rajeev, Cédric Le Goater, Christophe JAILLET, Christophe Leroy, Christoph Hellwig,
Daniel Axtens, David Yang, Erhard Furtner, Fabiano Rosas, Greg Kroah-Hartman, Guo Ren,
Hari Bathini, Jason Wang, Joel Stanley, Julia Lawall, Kajol Jain, Kees Cook, Laurent
Dufour, Madhavan Srinivasan, Mark Brown, Minghao Chi, Nageswara R Sastry, Naresh Kamboju,
Nathan Chancellor, Nathan Lynch, Nicholas Piggin, Nick Child, Oliver O'Halloran, Peiwei
Hu, Randy Dunlap, Ravi Bangoria, Rob Herring, Russell Currey, Sachin Sant, Sean
Christopherson, Segher Boessenkool, Thadeu Lima de Souza Cascardo, Tyrel Datwyler, Xiang
wangx, Yang Guang.
-----BEGIN PGP SIGNATURE-----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=BxhQ
-----END PGP SIGNATURE-----
Merge tag 'powerpc-5.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman:
- Optimise radix KVM guest entry/exit by 2x on Power9/Power10.
- Allow firmware to tell us whether to disable the entry and uaccess
flushes on Power10 or later CPUs.
- Add BPF_PROBE_MEM support for 32 and 64-bit BPF jits.
- Several fixes and improvements to our hard lockup watchdog.
- Activate HAVE_DYNAMIC_FTRACE_WITH_REGS on 32-bit.
- Allow building the 64-bit Book3S kernel without hash MMU support, ie.
Radix only.
- Add KUAP (SMAP) support for 40x, 44x, 8xx, Book3E (64-bit).
- Add new encodings for perf_mem_data_src.mem_hops field, and use them
on Power10.
- A series of small performance improvements to 64-bit interrupt entry.
- Several commits fixing issues when building with the clang integrated
assembler.
- Many other small features and fixes.
Thanks to Alan Modra, Alexey Kardashevskiy, Ammar Faizi, Anders Roxell,
Arnd Bergmann, Athira Rajeev, Cédric Le Goater, Christophe JAILLET,
Christophe Leroy, Christoph Hellwig, Daniel Axtens, David Yang, Erhard
Furtner, Fabiano Rosas, Greg Kroah-Hartman, Guo Ren, Hari Bathini, Jason
Wang, Joel Stanley, Julia Lawall, Kajol Jain, Kees Cook, Laurent Dufour,
Madhavan Srinivasan, Mark Brown, Minghao Chi, Nageswara R Sastry, Naresh
Kamboju, Nathan Chancellor, Nathan Lynch, Nicholas Piggin, Nick Child,
Oliver O'Halloran, Peiwei Hu, Randy Dunlap, Ravi Bangoria, Rob Herring,
Russell Currey, Sachin Sant, Sean Christopherson, Segher Boessenkool,
Thadeu Lima de Souza Cascardo, Tyrel Datwyler, Xiang wangx, and Yang
Guang.
* tag 'powerpc-5.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (240 commits)
powerpc/xmon: Dump XIVE information for online-only processors.
powerpc/opal: use default_groups in kobj_type
powerpc/cacheinfo: use default_groups in kobj_type
powerpc/sched: Remove unused TASK_SIZE_OF
powerpc/xive: Add missing null check after calling kmalloc
powerpc/floppy: Remove usage of the deprecated "pci-dma-compat.h" API
selftests/powerpc: Add a test of sigreturning to an unaligned address
powerpc/64s: Use EMIT_WARN_ENTRY for SRR debug warnings
powerpc/64s: Mask NIP before checking against SRR0
powerpc/perf: Fix spelling of "its"
powerpc/32: Fix boot failure with GCC latent entropy plugin
powerpc/code-patching: Replace patch_instruction() by ppc_inst_write() in selftests
powerpc/code-patching: Move code patching selftests in its own file
powerpc/code-patching: Move instr_is_branch_{i/b}form() in code-patching.h
powerpc/code-patching: Move patch_exception() outside code-patching.c
powerpc/code-patching: Use test_trampoline for prefixed patch test
powerpc/code-patching: Fix patch_branch() return on out-of-range failure
powerpc/code-patching: Reorganise do_patch_instruction() to ease error handling
powerpc/code-patching: Fix unmap_patch_area() error handling
powerpc/code-patching: Fix error handling in do_patch_instruction()
...
|
||
|
Linus Torvalds
|
fd04899208 |
Updates for the time(r) subsystem:
Core:
- Make the clocksource watchdog more robust by better validation checks
of the measurement.
Drivers:
- New drivers for MStar and SSD20xd SOCs
- The usual cleanups and improvements all over the place
-----BEGIN PGP SIGNATURE-----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=7vCU
-----END PGP SIGNATURE-----
Merge tag 'timers-core-2022-01-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner:
"Updates for the time(r) subsystem:
Core:
- Make the clocksource watchdog more robust by better validation
checks of the measurement.
Drivers:
- New drivers for MStar and SSD20xd SOCs
- The usual cleanups and improvements all over the place"
* tag 'timers-core-2022-01-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
dt-bindings: timer: Add Mstar MSC313e timer devicetree bindings documentation
clocksource/drivers/msc313e: Add support for ssd20xd-based platforms
clocksource/drivers: Add MStar MSC313e timer support
clocksource/drivers/pistachio: Fix -Wunused-but-set-variable warning
clocksource/drivers/timer-imx-sysctr: Set cpumask to cpu_possible_mask
clocksource/drivers/imx-sysctr: Mark two variable with __ro_after_init
clocksource/drivers/renesas,ostm: Make RENESAS_OSTM symbol visible
clocksource/drivers/renesas-ostm: Add RZ/G2L OSTM support
dt-bindings: timer: renesas: ostm: Document Renesas RZ/G2L OSTM
clocksource/drivers/exynos_mct: Fix silly typo resulting in checkpatch warning
clocksource: Reduce the default clocksource_watchdog() retries to 2
clocksource: Avoid accidental unstable marking of clocksources
dt-bindings: timer: tpm-timer: Add imx8ulp compatible string
reset: Add of_reset_control_get_optional_exclusive()
clocksource/drivers/exynos_mct: Refactor resources allocation
dt-bindings: timer: remove rockchip,rk3066-timer compatible string from rockchip,rk-timer.yaml
dt-bindings: timer: cadence_ttc: Add power-domains
|
||
|
Linus Torvalds
|
e7d38f16c2 |
RCU pull request for v5.17
This pull request contains the following branches: doc.2021.11.30c: Documentation updates, perhaps most notably Neil Brown's writeup of the reference-counting analogy to RCU. exp.2021.12.07a: Expedited grace-period cleanups. fastnohz.2021.11.30c: Remove CONFIG_RCU_FAST_NO_HZ due to lack of valid users. I have asked around, posted a blog entry, and sent this series to LKML without result. fixes.2021.11.30c: Miscellaneous fixes. nocb.2021.12.09a: RCU callback offloading updates, perhaps most notably Frederic Weisbecker's updates allowing CPUs booted in the de-offloaded state to be offloaded at runtime. nolibc.2021.11.30c: nolibc fixes from Willy Tarreau and Anmar Faizi, but also including Mark Brown's addition of gettid(). tasks.2021.12.09a: RCU Tasks Trace fixes, including changes that increase the scalability of call_rcu_tasks_trace() for the BPF folks (Martin Lau and KP Singh). torture.2021.12.07a: Various fixes including those from Wander Lairson Costa and Li Zhijian. torturescript.2021.11.30c: Fixes plus addition of tests for the increased call_rcu_tasks_trace() scalability. -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEbK7UrM+RBIrCoViJnr8S83LZ+4wFAmHbtukTHHBhdWxtY2tA a2VybmVsLm9yZwAKCRCevxLzctn7jAX3D/4mrDqAPhAWLWKp7klRhvwypDxj0cxd /TuGNcZN+YdvNfwozcrog+8yiPxcxhNW1pMESi7SolAhRwuk1JEjiclY+7ORYd6a /dmJB/lQBezGAdgVabRaJjfLKikpQ+/EnzKee3jjTS1XhJRJe/hDwlVP2B6IROfy iko5yi+hxfhQdPW6UcpTPCl/4Jn63d9+2SIlW16H0LhzlJeYYsWz4tqOEKYeiHeB Zxq90InCVmb3YYJzOtk/G7pGQ2RxKPR6/ilm87yzAfJD0Dawd2pgYeDoGvzx94S6 CmhvA6GmwO3JOL6lH891AQVXskCODSJdosP/7otm9u36XJT+5lNOeLRsLbS0Sd9t BrJKfC7wBFuuIug8j5k3+QSXiKB7Q5JpXEhOjH4BIrkSL0Z0jSVsrZwCSbiUkjZZ CdF19bL+4h4x5ZL3pndsplX+9BDXsKEgGHWeuzzB4rmsUMtBg84HyfbPp8mLxm6B i7a1hNVQ5rFWYj6TpI1ZgOBIX07i21OyMAUbXn5JSWUmOyPp2V6D4Sp1zdlvRM0r hKkIg73NP6ah9QZQTp7T1rIjVmFc2KjbmNZQegjR2pHykPCChT6xnlFix4InV4Ma BDtigP6vhWz1YfKPjek5WESzHmMRoxdpFjqDY//Uj8/bKBccldO0osERKWtdDlDL bwMNjny3PPLRng== =K6AN -----END PGP SIGNATURE----- Merge tag 'rcu.2022.01.09a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu Pull RCU updates from Paul McKenney: - Documentation updates, perhaps most notably Neil Brown's writeup of the reference-counting analogy to RCU. - Expedited grace-period cleanups. - Remove CONFIG_RCU_FAST_NO_HZ due to lack of valid users. I have asked around, posted a blog entry, and sent this series to LKML without result. - Miscellaneous fixes. - RCU callback offloading updates, perhaps most notably Frederic Weisbecker's updates allowing CPUs booted in the de-offloaded state to be offloaded at runtime. - nolibc fixes from Willy Tarreau and Anmar Faizi, but also including Mark Brown's addition of gettid(). - RCU Tasks Trace fixes, including changes that increase the scalability of call_rcu_tasks_trace() for the BPF folks (Martin Lau and KP Singh). - Various fixes including those from Wander Lairson Costa and Li Zhijian. - Fixes plus addition of tests for the increased call_rcu_tasks_trace() scalability. * tag 'rcu.2022.01.09a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: (87 commits) rcu/nocb: Merge rcu_spawn_cpu_nocb_kthread() and rcu_spawn_one_nocb_kthread() rcu/nocb: Allow empty "rcu_nocbs" kernel parameter rcu/nocb: Create kthreads on all CPUs if "rcu_nocbs=" or "nohz_full=" are passed rcu/nocb: Optimize kthreads and rdp initialization rcu/nocb: Prepare nocb_cb_wait() to start with a non-offloaded rdp rcu/nocb: Remove rcu_node structure from nocb list when de-offloaded rcu-tasks: Use fewer callbacks queues if callback flood ends rcu-tasks: Use separate ->percpu_dequeue_lim for callback dequeueing rcu-tasks: Use more callback queues if contention encountered rcu-tasks: Avoid raw-spinlocked wakeups from call_rcu_tasks_generic() rcu-tasks: Count trylocks to estimate call_rcu_tasks() contention rcu-tasks: Add rcupdate.rcu_task_enqueue_lim to set initial queueing rcu-tasks: Make rcu_barrier_tasks*() handle multiple callback queues rcu-tasks: Use workqueues for multiple rcu_tasks_invoke_cbs() invocations rcu-tasks: Abstract invocations of callbacks rcu-tasks: Abstract checking of callback lists rcu-tasks: Add a ->percpu_enqueue_lim to the rcu_tasks structure rcu-tasks: Inspect stalled task's trc state in locked state rcu-tasks: Use spin_lock_rcu_node() and friends rcutorture: Combine n_max_cbs from all kthreads in a callback flood ... |
||
|
Linus Torvalds
|
b35b6d4d71 |
Power management updates for 5.17-rc1
- Add new P-state driver for AMD processors (Huang Rui).
- Fix initialization of min and max frequency QoS requests in the
cpufreq core (Rafael Wysocki).
- Fix EPP handling on Alder Lake in intel_pstate (Srinivas Pandruvada).
- Make intel_pstate update cpuinfo.max_freq when notified of HWP
capabilities changes and drop a redundant function call from that
driver (Rafael Wysocki).
- Improve IRQ support in the Qcom cpufreq driver (Ard Biesheuvel,
Stephen Boyd, Vladimir Zapolskiy).
- Fix double devm_remap() in the Mediatek cpufreq driver (Hector Yuan).
- Introduce thermal pressure helpers for cpufreq CPU cooling (Lukasz
Luba).
- Make cpufreq use default_groups in kobj_type (Greg Kroah-Hartman).
- Make cpuidle use default_groups in kobj_type (Greg Kroah-Hartman).
- Fix two comments in cpuidle code (Jason Wang, Yang Li).
- Allow model-specific normal EPB value to be used in the intel_epb
sysfs attribute handling code (Srinivas Pandruvada).
- Simplify locking in pm_runtime_put_suppliers() (Rafael Wysocki).
- Add safety net to supplier device release in the runtime PM core
code (Rafael Wysocki).
- Capture device status before disabling runtime PM for it (Rafael
Wysocki).
- Add new macros for declaring PM operations to allow drivers to
avoid guarding them with CONFIG_PM #ifdefs or __maybe_unused and
update some drivers to use these macros (Paul Cercueil).
- Allow ACPI hardware signature to be honoured during restore from
hibernation (David Woodhouse).
- Update outdated operating performance points (OPP) documentation
(Tang Yizhou).
- Reduce log severity for informative message regarding frequency
transition failures in devfreq (Tzung-Bi Shih).
- Add DRAM frequency controller devfreq driver for Allwinner sunXi
SoCs (Samuel Holland).
- Add missing COMMON_CLK dependency to sun8i devfreq driver (Arnd
Bergmann).
- Add support for new layout of Psys PowerLimit Register on SPR to
the Intel RAPL power capping driver (Zhang Rui).
- Fix typo in a comment in idle_inject.c (Jason Wang).
- Remove unused function definition from the DTPM (Dynamit Thermal
Power Management) power capping framework (Daniel Lezcano).
- Reduce DTPM trace verbosity (Daniel Lezcano).
-----BEGIN PGP SIGNATURE-----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=1egI
-----END PGP SIGNATURE-----
Merge tag 'pm-5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki:
"The most signigicant change here is the addition of a new cpufreq
'P-state' driver for AMD processors as a better replacement for the
venerable acpi-cpufreq driver.
There are also other cpufreq updates (in the core, intel_pstate, ARM
drivers), PM core updates (mostly related to adding new macros for
declaring PM operations which should make the lives of driver
developers somewhat easier), and a bunch of assorted fixes and
cleanups.
Summary:
- Add new P-state driver for AMD processors (Huang Rui).
- Fix initialization of min and max frequency QoS requests in the
cpufreq core (Rafael Wysocki).
- Fix EPP handling on Alder Lake in intel_pstate (Srinivas
Pandruvada).
- Make intel_pstate update cpuinfo.max_freq when notified of HWP
capabilities changes and drop a redundant function call from that
driver (Rafael Wysocki).
- Improve IRQ support in the Qcom cpufreq driver (Ard Biesheuvel,
Stephen Boyd, Vladimir Zapolskiy).
- Fix double devm_remap() in the Mediatek cpufreq driver (Hector
Yuan).
- Introduce thermal pressure helpers for cpufreq CPU cooling (Lukasz
Luba).
- Make cpufreq use default_groups in kobj_type (Greg Kroah-Hartman).
- Make cpuidle use default_groups in kobj_type (Greg Kroah-Hartman).
- Fix two comments in cpuidle code (Jason Wang, Yang Li).
- Allow model-specific normal EPB value to be used in the intel_epb
sysfs attribute handling code (Srinivas Pandruvada).
- Simplify locking in pm_runtime_put_suppliers() (Rafael Wysocki).
- Add safety net to supplier device release in the runtime PM core
code (Rafael Wysocki).
- Capture device status before disabling runtime PM for it (Rafael
Wysocki).
- Add new macros for declaring PM operations to allow drivers to
avoid guarding them with CONFIG_PM #ifdefs or __maybe_unused and
update some drivers to use these macros (Paul Cercueil).
- Allow ACPI hardware signature to be honoured during restore from
hibernation (David Woodhouse).
- Update outdated operating performance points (OPP) documentation
(Tang Yizhou).
- Reduce log severity for informative message regarding frequency
transition failures in devfreq (Tzung-Bi Shih).
- Add DRAM frequency controller devfreq driver for Allwinner sunXi
SoCs (Samuel Holland).
- Add missing COMMON_CLK dependency to sun8i devfreq driver (Arnd
Bergmann).
- Add support for new layout of Psys PowerLimit Register on SPR to
the Intel RAPL power capping driver (Zhang Rui).
- Fix typo in a comment in idle_inject.c (Jason Wang).
- Remove unused function definition from the DTPM (Dynamit Thermal
Power Management) power capping framework (Daniel Lezcano).
- Reduce DTPM trace verbosity (Daniel Lezcano)"
* tag 'pm-5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (53 commits)
x86, sched: Fix undefined reference to init_freq_invariance_cppc() build error
cpufreq: amd-pstate: Fix Kconfig dependencies for AMD P-State
cpufreq: amd-pstate: Fix struct amd_cpudata kernel-doc comment
cpuidle: use default_groups in kobj_type
x86: intel_epb: Allow model specific normal EPB value
MAINTAINERS: Add AMD P-State driver maintainer entry
Documentation: amd-pstate: Add AMD P-State driver introduction
cpufreq: amd-pstate: Add AMD P-State performance attributes
cpufreq: amd-pstate: Add AMD P-State frequencies attributes
cpufreq: amd-pstate: Add boost mode support for AMD P-State
cpufreq: amd-pstate: Add trace for AMD P-State module
cpufreq: amd-pstate: Introduce the support for the processors with shared memory solution
cpufreq: amd-pstate: Add fast switch function for AMD P-State
cpufreq: amd-pstate: Introduce a new AMD P-State driver to support future processors
ACPI: CPPC: Add CPPC enable register function
ACPI: CPPC: Check present CPUs for determining _CPC is valid
ACPI: CPPC: Implement support for SystemIO registers
x86/msr: Add AMD CPPC MSR definitions
x86/cpufeatures: Add AMD Collaborative Processor Performance Control feature flag
cpufreq: use default_groups in kobj_type
...
|
||
|
Linus Torvalds
|
8d0749b4f8 |
drm for 5.17-rc1
core: - add privacy screen support - move nomodeset option into drm subsystem - clean up nomodeset handling in drivers - make drm_irq.c legacy - fix stack_depot name conflicts - remove DMA_BUF_SET_NAME ioctl restrictions - sysfs: send hotplug event - replace several DRM_* logging macros with drm_* - move hashtable to legacy code - add error return from gem_create_object - cma-helper: improve interfaces, drop CONFIG_DRM_KMS_CMA_HELPER - kernel.h related include cleanups - support XRGB2101010 source buffers ttm: - don't include drm hashtable - stop pruning fences after wait - documentation updates dma-buf: - add dma_resv selftest - add debugfs helpers - remove dma_resv_get_excl_unlocked - documentation - make fences mandatory in dma_resv_add_excl_fence dp: - add link training delay helpers gem: - link shmem/cma helpers into separate modules - use dma_resv iteratior - import dma-buf namespace into gem helper modules scheduler: - fence grab fix - lockdep fixes bridge: - switch to managed MIPI DSI helpers - register and attach during probe fixes - convert to YAML in several places. panel: - add bunch of new panesl simpledrm: - support FB_DAMAGE_CLIPS - support virtual screen sizes - add Apple M1 support amdgpu: - enable seamless boot for DCN 3.01 - runtime PM fixes - use drm_kms_helper_connector_hotplug_event - get all fences at once - use generic drm fb helpers - PSR/DPCD/LTTPR/DSC/PM/RAS/OLED/SRIOV fixes - add smart trace buffer (STB) for supported GPUs - display debugfs entries - new SMU debug option - Documentation update amdkfd: - IP discovery enumeration refactor - interface between driver fixes - SVM fixes - kfd uapi header to define some sysfs bitfields. i915: - support VESA panel backlights - enable ADL-P by default - add eDP privacy screen support - add Raptor Lake S (RPL-S) support - DG2 page table support - lots of GuC/HuC fw refactoring - refactored i915->gt interfaces - CD clock squashing support - enable 10-bit gamma support - update ADL-P DMC fw to v2.14 - enable runtime PM autosuspend by default - ADL-P DSI support - per-lane DP drive settings for ICL+ - add support for pipe C/D DMC firmware - Atomic gamma LUT updates - remove CCS FB stride restrictions on ADL-P - VRR platform support for display 11 - add support for display audio codec keepalive - lots of display refactoring - fix runtime PM handling during PXP suspend - improved eviction performance with async TTM moves - async VMA unbinding improvements - VMA locking refactoring - improved error capture robustness - use per device iommu checks - drop bits stealing from i915_sw_fence function ptr - remove dma_resv_prune - add IC cache invalidation on DG2 nouveau: - crc fixes - validate LUTs in atomic check - set HDMI AVI RGB quant to full tegra: - buffer objects reworks for dma-buf compat - NVDEC driver uAPI support - power management improvements etnaviv: - IOMMU enabled system support - fix > 4GB command buffer mapping - close a DoS vector - fix spurious GPU resets ast: - fix i2c initialization rcar-du: - DSI output support exynos: - replace legacy gpio interface - implement generic GEM object mmap msm: - dpu plane state cleanup in prep for multirect - dpu debugfs cleanups - dp support for sc7280 - a506 support - removal of struct_mutex - remove old eDP sub-driver anx7625: - support MIPI DSI input - support HDMI audio - fix reading EDID lvds: - fix bridge DT bindings megachips: - probe both bridges before registering dw-hdmi: - allow interlace on bridge ps8640: - enable runtime PM - support aux-bus tx358768: - enable reference clock - add pulse mode support ti-sn65dsi86: - use regmap bulk write - add PWM support etnaviv: - get all fences at once gma500: - gem object cleanups kmb: - enable fb console radeon: - use dma_resv_wait_timeout rockchip: - add DSP hold timeout - suspend/resume fixes - PLL clock fixes - implement mmap in GEM object functions - use generic fbdev emulation sun4i: - use CMA helpers without vmap support vc4: - fix HDMI-CEC hang with display is off - power on HDMI controller while disabling - support 4K@60Hz modes - support 10-bit YUV 4:2:0 output vmwgfx: - fix leak on probe errors - fail probing on broken hosts - new placement for MOB page tables - hide internal BOs from userspace - implement GEM support - implement GL 4.3 support virtio: - overflow fixes xen: - implement mmap as GEM object function omapdrm: - fix scatterlist export - support virtual planes mediatek: - MT8192 support - CMDQ refinement -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEEKbZHaGwW9KfbeusDHTzWXnEhr4FAmHX1vMACgkQDHTzWXnE hr6rAw/9ES5RO5N3Ku9foFk1CI9bqy1Kh663KLkkEc+rDdhKpiZbBnAsrKkZ9sGu fNuHmWNN5nWXtDSOqHWuslt3F7Gh+qEBQtlkqC9mZsBm3bWB0aJK6E4QaJxfeSaK ta6AmyGx8DaV+C69i86dnemQurYSDVjROd7LDPKnCU0Fye/JxiXSXQmXksKMFVxd x5vmO9yfeDSg3EF+u1yB6nJNUYZBV0vhrAfjPqxPCRBXuQc7akuaglE/SFwlGnEk vn0GjVHEQcRTqYKrHr64xvQxIoKXcJP0pkDUyT7KYCsyj8GJkvxkb7/ls5pp5DvL SwyNg3J3vwUVP6w6GEvzf3ffG720qqUZvCbvLmE+A/t2DhGILiAm+HXSo43PTOW8 uagT7Gxma8dy8EovjSxioS9HPX8Gcu+S+XYavgOsevOZ7oeEt4f4TLW7LXsw9d6y 75FrMhiUpreab5hAh8Le0swuLYZHjdnJRdjSTqZJ/T6VdTdVftLT6IfwvSDx5CHy cWuufgcAjd7xVTXFquHWYXWLTQkiSMGf1M02jx9IWolTd4Cm41LNBhqMEDHZLHJD 7ngGgoaREVDQ+MqjG90yfIwJFIpJPI3YOaHLi/Kznga+iDzFY6cyOQWW2vX7ZdY5 7+LJWsgGT8Feb7/bzD5hX1mYqJLxh1pWUIaqIKMl+7LJL7gTVU8= =MByd -----END PGP SIGNATURE----- Merge tag 'drm-next-2022-01-07' of git://anongit.freedesktop.org/drm/drm Pull drm updates from Dave Airlie: "Highlights are support for privacy screens found in new laptops, a bunch of nomodeset refactoring, and i915 enables ADL-P systems by default, while starting to add RPL-S support. vmwgfx adds GEM and support for OpenGL 4.3 features in userspace. Lots of internal refactorings around dma reservations, and lots of driver refactoring as well. Summary: core: - add privacy screen support - move nomodeset option into drm subsystem - clean up nomodeset handling in drivers - make drm_irq.c legacy - fix stack_depot name conflicts - remove DMA_BUF_SET_NAME ioctl restrictions - sysfs: send hotplug event - replace several DRM_* logging macros with drm_* - move hashtable to legacy code - add error return from gem_create_object - cma-helper: improve interfaces, drop CONFIG_DRM_KMS_CMA_HELPER - kernel.h related include cleanups - support XRGB2101010 source buffers ttm: - don't include drm hashtable - stop pruning fences after wait - documentation updates dma-buf: - add dma_resv selftest - add debugfs helpers - remove dma_resv_get_excl_unlocked - documentation - make fences mandatory in dma_resv_add_excl_fence dp: - add link training delay helpers gem: - link shmem/cma helpers into separate modules - use dma_resv iteratior - import dma-buf namespace into gem helper modules scheduler: - fence grab fix - lockdep fixes bridge: - switch to managed MIPI DSI helpers - register and attach during probe fixes - convert to YAML in several places. panel: - add bunch of new panesl simpledrm: - support FB_DAMAGE_CLIPS - support virtual screen sizes - add Apple M1 support amdgpu: - enable seamless boot for DCN 3.01 - runtime PM fixes - use drm_kms_helper_connector_hotplug_event - get all fences at once - use generic drm fb helpers - PSR/DPCD/LTTPR/DSC/PM/RAS/OLED/SRIOV fixes - add smart trace buffer (STB) for supported GPUs - display debugfs entries - new SMU debug option - Documentation update amdkfd: - IP discovery enumeration refactor - interface between driver fixes - SVM fixes - kfd uapi header to define some sysfs bitfields. i915: - support VESA panel backlights - enable ADL-P by default - add eDP privacy screen support - add Raptor Lake S (RPL-S) support - DG2 page table support - lots of GuC/HuC fw refactoring - refactored i915->gt interfaces - CD clock squashing support - enable 10-bit gamma support - update ADL-P DMC fw to v2.14 - enable runtime PM autosuspend by default - ADL-P DSI support - per-lane DP drive settings for ICL+ - add support for pipe C/D DMC firmware - Atomic gamma LUT updates - remove CCS FB stride restrictions on ADL-P - VRR platform support for display 11 - add support for display audio codec keepalive - lots of display refactoring - fix runtime PM handling during PXP suspend - improved eviction performance with async TTM moves - async VMA unbinding improvements - VMA locking refactoring - improved error capture robustness - use per device iommu checks - drop bits stealing from i915_sw_fence function ptr - remove dma_resv_prune - add IC cache invalidation on DG2 nouveau: - crc fixes - validate LUTs in atomic check - set HDMI AVI RGB quant to full tegra: - buffer objects reworks for dma-buf compat - NVDEC driver uAPI support - power management improvements etnaviv: - IOMMU enabled system support - fix > 4GB command buffer mapping - close a DoS vector - fix spurious GPU resets ast: - fix i2c initialization rcar-du: - DSI output support exynos: - replace legacy gpio interface - implement generic GEM object mmap msm: - dpu plane state cleanup in prep for multirect - dpu debugfs cleanups - dp support for sc7280 - a506 support - removal of struct_mutex - remove old eDP sub-driver anx7625: - support MIPI DSI input - support HDMI audio - fix reading EDID lvds: - fix bridge DT bindings megachips: - probe both bridges before registering dw-hdmi: - allow interlace on bridge ps8640: - enable runtime PM - support aux-bus tx358768: - enable reference clock - add pulse mode support ti-sn65dsi86: - use regmap bulk write - add PWM support etnaviv: - get all fences at once gma500: - gem object cleanups kmb: - enable fb console radeon: - use dma_resv_wait_timeout rockchip: - add DSP hold timeout - suspend/resume fixes - PLL clock fixes - implement mmap in GEM object functions - use generic fbdev emulation sun4i: - use CMA helpers without vmap support vc4: - fix HDMI-CEC hang with display is off - power on HDMI controller while disabling - support 4K@60Hz modes - support 10-bit YUV 4:2:0 output vmwgfx: - fix leak on probe errors - fail probing on broken hosts - new placement for MOB page tables - hide internal BOs from userspace - implement GEM support - implement GL 4.3 support virtio: - overflow fixes xen: - implement mmap as GEM object function omapdrm: - fix scatterlist export - support virtual planes mediatek: - MT8192 support - CMDQ refinement" * tag 'drm-next-2022-01-07' of git://anongit.freedesktop.org/drm/drm: (1241 commits) drm/amdgpu: no DC support for headless chips drm/amd/display: fix dereference before NULL check drm/amdgpu: always reset the asic in suspend (v2) drm/amdgpu: put SMU into proper state on runpm suspending for BOCO capable platform drm/amd/display: Fix the uninitialized variable in enable_stream_features() drm/amdgpu: fix runpm documentation amdgpu/pm: Make sysfs pm attributes as read-only for VFs drm/amdgpu: save error count in RAS poison handler drm/amdgpu: drop redundant semicolon drm/amd/display: get and restore link res map drm/amd/display: support dynamic HPO DP link encoder allocation drm/amd/display: access hpo dp link encoder only through link resource drm/amd/display: populate link res in both detection and validation drm/amd/display: define link res and make it accessible to all link interfaces drm/amd/display: 3.2.167 drm/amd/display: [FW Promotion] Release 0.0.98 drm/amd/display: Undo ODM combine drm/amd/display: Add reg defs for DCN303 drm/amd/display: Changed pipe split policy to allow for multi-display pipe split drm/amd/display: Set optimize_pwr_state for DCN31 ... |
||
|
Linus Torvalds
|
8cc1e20765 |
m68k updates for v5.17
- Enable memtest functionality, - Defconfig updates. -----BEGIN PGP SIGNATURE----- iIsEABYIADMWIQQ9qaHoIs/1I4cXmEiKwlD9ZEnxcAUCYdv5NBUcZ2VlcnRAbGlu dXgtbTY4ay5vcmcACgkQisJQ/WRJ8XC64QEA05ivU51OseXmg32fdo0peKpPNE2/ 2Nl+4j9lKlRyZzcBAL3EmUe+rrJ84kiGeI8g90asWbJw7qHRC2QsdA7RQ/YA =lHFZ -----END PGP SIGNATURE----- Merge tag 'm68k-for-v5.17-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k Pull m68k updates from Geert Uytterhoeven: - enable memtest functionality - defconfig updates * tag 'm68k-for-v5.17-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k: defconfig: Update defconfigs for v5.16-rc1 m68k: Enable memtest functionality |
||
Rafael J. Wysocki
|
c001a52df4 |
Merge branches 'pm-cpuidle', 'pm-core' and 'pm-sleep'
Merge cpuidle updates, PM core updates and one hiberation-related update for 5.17-rc1: - Make cpuidle use default_groups in kobj_type (Greg Kroah-Hartman). - Fix two comments in cpuidle code (Jason Wang, Yang Li). - Simplify locking in pm_runtime_put_suppliers() (Rafael Wysocki). - Add safety net to supplier device release in the runtime PM core code (Rafael Wysocki). - Capture device status before disabling runtime PM for it (Rafael Wysocki). - Add new macros for declaring PM operations to allow drivers to avoid guarding them with CONFIG_PM #ifdefs or __maybe_unused and update some drivers to use these macros (Paul Cercueil). - Allow ACPI hardware signature to be honoured during restore from hibernation (David Woodhouse). * pm-cpuidle: cpuidle: use default_groups in kobj_type cpuidle: Fix cpuidle_remove_state_sysfs() kerneldoc comment cpuidle: menu: Fix typo in a comment * pm-core: PM: runtime: Simplify locking in pm_runtime_put_suppliers() mmc: mxc: Use the new PM macros mmc: jz4740: Use the new PM macros PM: runtime: Add safety net to supplier device release PM: runtime: Capture device status before disabling runtime PM PM: core: Add new *_PM_OPS macros, deprecate old ones PM: core: Redefine pm_ptr() macro r8169: Avoid misuse of pm_ptr() macro * pm-sleep: PM: hibernate: Allow ACPI hardware signature to be honoured |
||
|
Linus Torvalds
|
5b5e3d0347 |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input fixes from Dmitry Torokhov: "A few small updates to drivers. Of note we are now deferring probes of i8042 on some Asus devices as the controller is not ready to respond to queries first time around when the driver is compiled into the kernel" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: elants_i2c - do not check Remark ID on eKTH3900/eKTH5312 Input: atmel_mxt_ts - fix double free in mxt_read_info_block Input: goodix - fix memory leak in goodix_firmware_upload Input: goodix - add id->model mapping for the "9111" model Input: goodix - try not to touch the reset-pin on x86/ACPI devices Input: i8042 - enable deferred probe quirk for ASUS UM325UA Input: elantech - fix stack out of bound access in elantech_change_report_id() Input: iqs626a - prohibit inlining of channel parsing functions Input: i8042 - add deferred probe support |
||
|
Sean Christopherson
|
0ff29701ff |
KVM: VMX: Fix stale docs for kvm-intel.emulate_invalid_guest_state
Update the documentation for kvm-intel's emulate_invalid_guest_state to
rectify the description of KVM's default behavior, and to document that
the behavior and thus parameter only applies to L1.
Fixes:
|
||
|
Paul E. McKenney
|
f80fe66c38 |
Merge branches 'doc.2021.11.30c', 'exp.2021.12.07a', 'fastnohz.2021.11.30c', 'fixes.2021.11.30c', 'nocb.2021.12.09a', 'nolibc.2021.11.30c', 'tasks.2021.12.09a', 'torture.2021.12.07a' and 'torturescript.2021.11.30c' into HEAD
doc.2021.11.30c: Documentation updates. exp.2021.12.07a: Expedited-grace-period fixes. fastnohz.2021.11.30c: Remove CONFIG_RCU_FAST_NO_HZ. fixes.2021.11.30c: Miscellaneous fixes. nocb.2021.12.09a: No-CB CPU updates. nolibc.2021.11.30c: Tiny in-kernel library updates. tasks.2021.12.09a: RCU-tasks updates, including update-side scalability. torture.2021.12.07a: Torture-test in-kernel module updates. torturescript.2021.11.30c: Torture-test scripting updates. |
||
Frederic Weisbecker
|
d2cf0854d7 |
rcu/nocb: Allow empty "rcu_nocbs" kernel parameter
Allow the rcu_nocbs kernel parameter to be specified just by itself, without specifying any CPUs. This allows systems administrators to use "rcu_nocbs" to specify that none of the CPUs are to be offloaded at boot time, but than any of them may be offloaded at runtime via cpusets. In contrast, if the "rcu_nocbs" or "nohz_full" kernel parameters are not specified at all, then not only are none of the CPUs offloaded at boot, none of them can be offloaded at runtime, either. While in the area, modernize the description of the "rcuo" kthreads' naming scheme. Reviewed-by: Neeraj Upadhyay <quic_neeraju@quicinc.com> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Uladzislau Rezki <urezki@gmail.com> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Joel Fernandes <joel@joelfernandes.org> Tested-by: Juri Lelli <juri.lelli@redhat.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
||
|
Paul E. McKenney
|
fd796e4139 |
rcu-tasks: Use fewer callbacks queues if callback flood ends
By default, when lock contention is encountered, the RCU Tasks flavors of RCU switch to using per-CPU queueing. However, if the callback flood ends, per-CPU queueing continues to be used, which introduces significant additional overhead, especially for callback invocation, which fans out a series of workqueue handlers. This commit therefore switches back to single-queue operation if at the beginning of a grace period there are very few callbacks. The definition of "very few" is set by the rcupdate.rcu_task_collapse_lim module parameter, which defaults to 10. This switch happens in two phases, with the first phase causing future callbacks to be enqueued on CPU 0's queue, but with all queues continuing to be checked for grace periods and callback invocation. The second phase checks to see if an RCU grace period has elapsed and if all remaining RCU-Tasks callbacks are queued on CPU 0. If so, only CPU 0 is checked for future grace periods and callback operation. Of course, the return of contention anywhere during this process will result in returning to per-CPU callback queueing. Reported-by: Martin Lau <kafai@fb.com> Cc: Neeraj Upadhyay <neeraj.iitr10@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
||
|
Paul E. McKenney
|
ab97152f88 |
rcu-tasks: Use more callback queues if contention encountered
The rcupdate.rcu_task_enqueue_lim module parameter allows system administrators to tune the number of callback queues used by the RCU Tasks flavors. However if callback storms are infrequent, it would be better to operate with a single queue on a given system unless and until that system actually needed more queues. Systems not needing more queues can then avoid the overhead of checking the extra queues and especially avoid the overhead of fanning workqueue handlers out to all CPUs to invoke callbacks. This commit therefore switches to using all the CPUs' callback queues if call_rcu_tasks_generic() encounters too much lock contention. The amount of lock contention to tolerate defaults to 100 contended lock acquisitions per jiffy, and can be adjusted using the new rcupdate.rcu_task_contend_lim module parameter. Such switching is undertaken only if the rcupdate.rcu_task_enqueue_lim module parameter is negative, which is its default value (-1). This allows savvy systems administrators to set the number of queues to some known good value and to not have to worry about the kernel doing any second guessing. [ paulmck: Apply feedback from Guillaume Tucker and kernelci. ] Reported-by: Martin Lau <kafai@fb.com> Cc: Neeraj Upadhyay <neeraj.iitr10@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
||
|
Paul E. McKenney
|
8610b65680 |
rcu-tasks: Add rcupdate.rcu_task_enqueue_lim to set initial queueing
This commit adds a rcupdate.rcu_task_enqueue_lim module parameter that sets the initial number of callback queues to use for the RCU Tasks family of RCU implementations. This parameter allows testing of various fanout values. Reported-by: Martin Lau <kafai@fb.com> Cc: Neeraj Upadhyay <neeraj.iitr10@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
||
|
Christophe Leroy
|
6754862249 |
powerpc/kuep: Remove 'nosmep' boot time parameter except for book3s/64
Deactivating KUEP at boot time is unrelevant for PPC32 and BOOK3E/64. Remove it. It allows to refactor setup_kuep() via a __weak function that only PPC64s will overide for now. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> [mpe: Fix CONFIG_PPC_BOOKS_64 -> CONFIG_PPC_BOOK3S_64 typo] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/4c36df18b41c988c4512f45d96220486adbe4c99.1634627931.git.christophe.leroy@csgroup.eu |
||
David Woodhouse
|
74d9555580 |
PM: hibernate: Allow ACPI hardware signature to be honoured
Theoretically, when the hardware signature in FACS changes, the OS is supposed to gracefully decline to attempt to resume from S4: "If the signature has changed, OSPM will not restore the system context and can boot from scratch" In practice, Windows doesn't do this and many laptop vendors do allow the signature to change especially when docking/undocking, so it would be a bad idea to simply comply with the specification by default in the general case. However, there are use cases where we do want the compliant behaviour and we know it's safe. Specifically, when resuming virtual machines where we know the hypervisor has changed sufficiently that resume will fail. We really want to be able to *tell* the guest kernel not to try, so it boots cleanly and doesn't just crash. This patch provides a way to opt in to the spec-compliant behaviour on the command line. A follow-up patch may do this automatically for certain "known good" machines based on a DMI match, or perhaps just for all hypervisor guests since there's no good reason a hypervisor would change the hardware_signature that it exposes to guests *unless* it wants them to obey the ACPI specification. Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Paul E. McKenney
|
82e310033d |
rcutorture: Enable multiple concurrent callback-flood kthreads
This commit converts the rcutorture.fwd_progress module parameter from bool to int, so that it specifies the number of callback-flood kthreads. Values less than zero specify one kthread per CPU, however, the number of kthreads executing concurrently is limited to the number of online CPUs. This commit also reverse the order of the need-resched and callback-flood operations to cause the callback flooding to happen more nearly at the same time. Cc: Neeraj Upadhyay <neeraj.iitr10@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
||
|
Paul E. McKenney
|
e2c73a6860 |
rcu: Remove the RCU_FAST_NO_HZ Kconfig option
All of the uses of CONFIG_RCU_FAST_NO_HZ=y that I have seen involve systems with RCU callbacks offloaded. In this situation, all that this Kconfig option does is slow down idle entry/exit with an additional allways-taken early exit. If this is the only use case, then this Kconfig option nothing but an attractive nuisance that needs to go away. This commit therefore removes the RCU_FAST_NO_HZ Kconfig option. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
||
Waiman Long
|
1a5620671a |
clocksource: Reduce the default clocksource_watchdog() retries to 2
With the previous patch, there is an extra watchdog read in each retry. Now the total number of clocksource reads is increased to 4 per iteration. In order to avoid increasing the clock skew check overhead, the default maximum number of retries is reduced from 3 to 2 to maintain the same 12 clocksource reads in the worst case. Suggested-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
||
Finn Thain
|
376e3fdecb |
m68k: Enable memtest functionality
Enable the memtest functionality and rearrange some code to prevent it from clobbering the initrd. The code to implement CONFIG_BLK_DEV_INITRD was conditional on !defined(CONFIG_SUN3). For simplicity, remove that test on the basis that m68k_ramdisk.size == 0 on Sun 3. The SLIME source code at http://sammy.net/sun3/ftp/pub/m68k/sun3/slime/slime-2.0.tar.gz indicates that no BI_RAMDISK entry is ever passed to the kernel due to #ifdef 0 around the relevant code. Cc: Mike Rapoport <rppt@kernel.org> Cc: Sam Creasey <sammy@sammy.net> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Finn Thain <fthain@linux-m68k.org> Acked-by: Mike Rapoport <rppt@linux.ibm.com> Link: https://lore.kernel.org/r/8170fe1d1c62426d82275d36ba409ecc18754292.1637274578.git.fthain@linux-m68k.org Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> |
||
Takashi Iwai
|
9222ba68c3 |
Input: i8042 - add deferred probe support
We've got a bug report about the non-working keyboard on ASUS ZenBook UX425UA. It seems that the PS/2 device isn't ready immediately at boot but takes some seconds to get ready. Until now, the only workaround is to defer the probe, but it's available only when the driver is a module. However, many distros, including openSUSE as in the original report, build the PS/2 input drivers into kernel, hence it won't work easily. This patch adds the support for the deferred probe for i8042 stuff as a workaround of the problem above. When the deferred probe mode is enabled and the device couldn't be probed, it'll be repeated with the standard deferred probe mechanism. The deferred probe mode is enabled either via the new option i8042.probe_defer or via the quirk table entry. As of this patch, the quirk table contains only ASUS ZenBook UX425UA. The deferred probe part is based on Fabio's initial work. BugLink: https://bugzilla.suse.com/show_bug.cgi?id=1190256 Signed-off-by: Takashi Iwai <tiwai@suse.de> Tested-by: Samuel Čavoj <samuel@cavoj.net> Link: https://lore.kernel.org/r/20211117063757.11380-1-tiwai@suse.de Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> |
||
Javier Martinez Canillas
|
b22a15a5ac
|
Documentation/admin-guide: Document nomodeset kernel parameter
The nomodeset kernel command line parameter is not documented. Its name is quite vague and is not intuitive what's the behaviour when it is set. Document in kernel-parameters.txt what actually happens when nomodeset is used. That way, users could know if they want to enable this option. Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Jani Nikula <jani.nikula@intel.com> Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211112133230.1595307-6-javierm@redhat.com |
||
Cédric Le Goater
|
c21ee04f11 |
powerpc/xive: Add a kernel parameter for StoreEOI
StoreEOI is activated by default on platforms supporting the feature (POWER10) and will be used as soon as firmware advertises its availability. The kernel parameter provides a way to deactivate its use. It can be still be reactivated through debugfs. Signed-off-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211105102636.1016378-10-clg@kaod.org |
||
Nicholas Piggin
|
0a4b4327ce |
powerpc/64s: Implement PMU override command line option
It can be useful in simulators (with very constrained environments) to allow some PMCs to run from boot so they can be sampled directly by a test harness, rather than having to run perf. A previous change freezes counters at boot by default, so provide a boot time option to un-freeze (plus a bit more flexibility). Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Athira Jajeev <atrajeev@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211123095231.1036501-13-npiggin@gmail.com |
||
|
Linus Torvalds
|
38764c7340 |
A slow cycle for nfsd: mainly cleanup, including Neil's patch dropping
support for a filehandle format deprecated 20 years ago, and further
xdr-related cleanup from Chuck.
-----BEGIN PGP SIGNATURE-----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=yKBl
-----END PGP SIGNATURE-----
Merge tag 'nfsd-5.16' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
"A slow cycle for nfsd: mainly cleanup, including Neil's patch dropping
support for a filehandle format deprecated 20 years ago, and further
xdr-related cleanup from Chuck"
* tag 'nfsd-5.16' of git://linux-nfs.org/~bfields/linux: (26 commits)
nfsd4: remove obselete comment
nfsd: document server-to-server-copy parameters
NFSD:fix boolreturn.cocci warning
nfsd: update create verifier comment
SUNRPC: Change return value type of .pc_encode
SUNRPC: Replace the "__be32 *p" parameter to .pc_encode
NFSD: Save location of NFSv4 COMPOUND status
SUNRPC: Change return value type of .pc_decode
SUNRPC: Replace the "__be32 *p" parameter to .pc_decode
SUNRPC: De-duplicate .pc_release() call sites
SUNRPC: Simplify the SVC dispatch code path
SUNRPC: Capture value of xdr_buf::page_base
SUNRPC: Add trace event when alloc_pages_bulk() makes no progress
svcrdma: Split svcrmda_wc_{read,write} tracepoints
svcrdma: Split the svcrdma_wc_send() tracepoint
svcrdma: Split the svcrdma_wc_receive() tracepoint
NFSD: Have legacy NFSD WRITE decoders use xdr_stream_subsegment()
SUNRPC: xdr_stream_subsegment() must handle non-zero page_bases
NFSD: Initialize pointer ni with NULL and not plain integer 0
NFSD: simplify struct nfsfh
...
|
||
|
Linus Torvalds
|
bf98ecbbae |
xen: branch for v5.16-rc1
-----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRTLbB6QfY48x44uB6AXGG7T9hjvgUCYYp8HgAKCRCAXGG7T9hj vmuVAP4whjbyIi4IxYEOnE6On0aD0AgUMiFa7QXrDZi6NXUQIwEAnggLFe+rEG5C Fwi/cEXSHrRgveqrgD4GYEr6l0GTxwM= =/fMa -----END PGP SIGNATURE----- Merge tag 'for-linus-5.16b-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull xen updates from Juergen Gross: - a series to speed up the boot of Xen PV guests - some cleanups in Xen related code - replacement of license texts with the appropriate SPDX headers and fixing of wrong SPDX headers in Xen header files - a small series making paravirtualized interrupt masking much simpler and at the same time removing complaints of objtool - a fix for Xen ballooning hogging workqueues for too long - enablement of the Xen pciback driver for Arm - some further small fixes/enhancements * tag 'for-linus-5.16b-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (22 commits) xen/balloon: fix unused-variable warning xen/balloon: rename alloc/free_xenballooned_pages xen/balloon: add late_initcall_sync() for initial ballooning done x86/xen: remove 32-bit awareness from startup_xen xen: remove highmem remnants xen: allow pv-only hypercalls only with CONFIG_XEN_PV x86/xen: remove 32-bit pv leftovers xen-pciback: allow compiling on other archs than x86 x86/xen: switch initial pvops IRQ functions to dummy ones x86/xen: remove xen_have_vcpu_info_placement flag x86/pvh: add prototype for xen_pvh_init() xen: Fix implicit type conversion xen: fix wrong SPDX headers of Xen related headers xen/pvcalls-back: Remove redundant 'flush_workqueue()' calls x86/xen: Remove redundant irq_enter/exit() invocations xen-pciback: Fix return in pm_ctrl_init() xen/x86: restrict PV Dom0 identity mapping xen/x86: there's no highmem anymore in PV mode xen/x86: adjust handling of the L3 user vsyscall special page table xen/x86: adjust xen_set_fixmap() ... |
||
|
Linus Torvalds
|
0b707e572a |
s390 updates for the 5.16 merge window
- Add support for ftrace with direct call and ftrace direct call samples. - Add support for kernel command lines longer than current 896 bytes and make its length configurable. - Add support for BEAR enhancement facility to improve last breaking event instruction tracking. - Add kprobes sanity checks and testcases to prevent kprobe in the mid of an instruction. - Allow concurrent access to /dev/hwc for the CPUMF users. - Various ftrace / jump label improvements. - Convert unwinder tests to KUnit. - Add s390_iommu_aperture kernel parameter to tweak the limits on concurrently usable DMA mappings. - Add ap.useirq AP module option which can be used to disable interrupt use. - Add add_disk() error handling support to block device drivers. - Drop arch specific and use generic implementation of strlcpy and strrchr. - Several __pa/__va usages fixes. - Various cio, crypto, pci, kernel doc and other small fixes and improvements all over the code. -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEE3QHqV+H2a8xAv27vjYWKoQLXFBgFAmGFW6EACgkQjYWKoQLX FBg20Qf/UbohgnKnE6vxbbH3sNTlI2dk3Cw4z3IobcsZgqXAu6AFLgLQGLk/X07F DIyUdrgSgCzLIEKLqrLrFXIOMIK44zAGaurIltNt7IrnWWlA+/YVD+YeL2gHwccq wT7KXRcrVMZQ1z18djJQ45DpPUC8ErBdL6+P+ftHck90YGFZsfMA5S7jf8X1h08U IlqdPTmY8t4unKHWVpHbxx9b+xrUuV6KTEXADsllpMV2jQoTLdDECd3vmefYR6tR 3lssgop1m/RzH5OCqvia5Sy2D5fOQObNWDMakwOkVMxOD43lmGCTHstzS2Uo2OFE QcY79lfZ5NrzKnenUdE5Fd0XJ9kSwQ== =k0Ab -----END PGP SIGNATURE----- Merge tag 's390-5.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Vasily Gorbik: - Add support for ftrace with direct call and ftrace direct call samples. - Add support for kernel command lines longer than current 896 bytes and make its length configurable. - Add support for BEAR enhancement facility to improve last breaking event instruction tracking. - Add kprobes sanity checks and testcases to prevent kprobe in the mid of an instruction. - Allow concurrent access to /dev/hwc for the CPUMF users. - Various ftrace / jump label improvements. - Convert unwinder tests to KUnit. - Add s390_iommu_aperture kernel parameter to tweak the limits on concurrently usable DMA mappings. - Add ap.useirq AP module option which can be used to disable interrupt use. - Add add_disk() error handling support to block device drivers. - Drop arch specific and use generic implementation of strlcpy and strrchr. - Several __pa/__va usages fixes. - Various cio, crypto, pci, kernel doc and other small fixes and improvements all over the code. [ Merge fixup as per https://lore.kernel.org/all/YXAqZ%2FEszRisunQw@osiris/ ] * tag 's390-5.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (63 commits) s390: make command line configurable s390: support command lines longer than 896 bytes s390/kexec_file: move kernel image size check s390/pci: add s390_iommu_aperture kernel parameter s390/spinlock: remove incorrect kernel doc indicator s390/string: use generic strlcpy s390/string: use generic strrchr s390/ap: function rework based on compiler warning s390/cio: make ccw_device_dma_* more robust s390/vfio-ap: s390/crypto: fix all kernel-doc warnings s390/hmcdrv: fix kernel doc comments s390/ap: new module option ap.useirq s390/cpumf: Allow multiple processes to access /dev/hwc s390/bitops: return true/false (not 1/0) from bool functions s390: add support for BEAR enhancement facility s390: introduce nospec_uses_trampoline() s390: rename last_break to pgm_last_break s390/ptrace: add last_break member to pt_regs s390/sclp: sort out physical vs virtual pointers usage s390/setup: convert start and end initrd pointers to virtual ... |
||
|
Linus Torvalds
|
512b7931ad |
Merge branch 'akpm' (patches from Andrew)
Merge misc updates from Andrew Morton: "257 patches. Subsystems affected by this patch series: scripts, ocfs2, vfs, and mm (slab-generic, slab, slub, kconfig, dax, kasan, debug, pagecache, gup, swap, memcg, pagemap, mprotect, mremap, iomap, tracing, vmalloc, pagealloc, memory-failure, hugetlb, userfaultfd, vmscan, tools, memblock, oom-kill, hugetlbfs, migration, thp, readahead, nommu, ksm, vmstat, madvise, memory-hotplug, rmap, zsmalloc, highmem, zram, cleanups, kfence, and damon)" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (257 commits) mm/damon: remove return value from before_terminate callback mm/damon: fix a few spelling mistakes in comments and a pr_debug message mm/damon: simplify stop mechanism Docs/admin-guide/mm/pagemap: wordsmith page flags descriptions Docs/admin-guide/mm/damon/start: simplify the content Docs/admin-guide/mm/damon/start: fix a wrong link Docs/admin-guide/mm/damon/start: fix wrong example commands mm/damon/dbgfs: add adaptive_targets list check before enable monitor_on mm/damon: remove unnecessary variable initialization Documentation/admin-guide/mm/damon: add a document for DAMON_RECLAIM mm/damon: introduce DAMON-based Reclamation (DAMON_RECLAIM) selftests/damon: support watermarks mm/damon/dbgfs: support watermarks mm/damon/schemes: activate schemes based on a watermarks mechanism tools/selftests/damon: update for regions prioritization of schemes mm/damon/dbgfs: support prioritization weights mm/damon/vaddr,paddr: support pageout prioritization mm/damon/schemes: prioritize regions within the quotas mm/damon/selftests: support schemes quotas mm/damon/dbgfs: support quotas of schemes ... |
||
Zhenguo Yao
|
b5389086ad |
hugetlbfs: extend the definition of hugepages parameter to support node allocation
We can specify the number of hugepages to allocate at boot. But the hugepages is balanced in all nodes at present. In some scenarios, we only need hugepages in one node. For example: DPDK needs hugepages which are in the same node as NIC. If DPDK needs four hugepages of 1G size in node1 and system has 16 numa nodes we must reserve 64 hugepages on the kernel cmdline. But only four hugepages are used. The others should be free after boot. If the system memory is low(for example: 64G), it will be an impossible task. So extend the hugepages parameter to support specifying hugepages on a specific node. For example add following parameter: hugepagesz=1G hugepages=0:1,1:3 It will allocate 1 hugepage in node0 and 3 hugepages in node1. Link: https://lkml.kernel.org/r/20211005054729.86457-1-yaozhenguo1@gmail.com Signed-off-by: Zhenguo Yao <yaozhenguo1@gmail.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Zhenguo Yao <yaozhenguo1@gmail.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Mike Rapoport <rppt@kernel.org> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
Baolin Wang
|
38e719ab26 |
hugetlb: support node specified when using cma for gigantic hugepages
Now the size of CMA area for gigantic hugepages runtime allocation is balanced for all online nodes, but we also want to specify the size of CMA per-node, or only one node in some cases, which are similar with patch [1]. For example, on some multi-nodes systems, each node's memory can be different, allocating the same size of CMA for each node is not suitable for the low-memory nodes. Meanwhile some workloads like DPDK mentioned by Zhenguo in patch [1] only need hugepages in one node. On the other hand, we have some machines with multiple types of memory, like DRAM and PMEM (persistent memory). On this system, we may want to specify all the hugepages only on DRAM node, or specify the proportion of DRAM node and PMEM node, to tuning the performance of the workloads. Thus this patch adds node format for 'hugetlb_cma' parameter to support specifying the size of CMA per-node. An example is as follows: hugetlb_cma=0:5G,2:5G which means allocating 5G size of CMA area on node 0 and node 2 respectively. And the users should use the node specific sysfs file to allocate the gigantic hugepages if specified the CMA size on that node. Link: https://lkml.kernel.org/r/20211005054729.86457-1-yaozhenguo1@gmail.com [1] Link: https://lkml.kernel.org/r/bb790775ca60bb8f4b26956bb3f6988f74e075c7.1634261144.git.baolin.wang@linux.alibaba.com Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Roman Gushchin <guro@fb.com> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
Juergen Gross
|
40fdea0284 |
xen/balloon: add late_initcall_sync() for initial ballooning done
When running as PVH or HVM guest with actual memory < max memory the hypervisor is using "populate on demand" in order to allow the guest to balloon down from its maximum memory size. For this to work correctly the guest must not touch more memory pages than its target memory size as otherwise the PoD cache will be exhausted and the guest is crashed as a result of that. In extreme cases ballooning down might not be finished today before the init process is started, which can consume lots of memory. In order to avoid random boot crashes in such cases, add a late init call to wait for ballooning down having finished for PVH/HVM guests. Warn on console if initial ballooning fails, panic() after stalling for more than 3 minutes per default. Add a module parameter for changing this timeout. [boris: replaced pr_info() with pr_notice()] Cc: <stable@vger.kernel.org> Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com> Signed-off-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/20211102091944.17487-1-jgross@suse.com Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> |
||
|
Linus Torvalds
|
95faf6ba65 |
Driver core changes for 5.16-rc1
Here is the big set of driver core changes for 5.16-rc1.
All of these have been in linux-next for a while now with no reported
problems.
Included in here are:
- big update and cleanup of the sysfs abi documentation files
and scripts from Mauro. We are almost at the place where we
can properly check that the running kernel's sysfs abi is
documented fully.
- firmware loader updates
- dyndbg updates
- kernfs cleanups and fixes from Christoph
- device property updates
- component fix
- other minor driver core cleanups and fixes
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCYYPbjQ8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+ync9gCfXKMUI1GAnCfJWAwTdTcd18q5akoAoMw32/AH
0yh5TjAWFyFd7xz5d7qs
=itsC
-----END PGP SIGNATURE-----
Merge tag 'driver-core-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH:
"Here is the big set of driver core changes for 5.16-rc1.
All of these have been in linux-next for a while now with no reported
problems.
Included in here are:
- big update and cleanup of the sysfs abi documentation files and
scripts from Mauro. We are almost at the place where we can
properly check that the running kernel's sysfs abi is documented
fully.
- firmware loader updates
- dyndbg updates
- kernfs cleanups and fixes from Christoph
- device property updates
- component fix
- other minor driver core cleanups and fixes"
* tag 'driver-core-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (122 commits)
device property: Drop redundant NULL checks
x86/build: Tuck away built-in firmware under FW_LOADER
vmlinux.lds.h: wrap built-in firmware support under FW_LOADER
firmware_loader: move struct builtin_fw to the only place used
x86/microcode: Use the firmware_loader built-in API
firmware_loader: remove old DECLARE_BUILTIN_FIRMWARE()
firmware_loader: formalize built-in firmware API
component: do not leave master devres group open after bind
dyndbg: refine verbosity 1-4 summary-detail
gpiolib: acpi: Replace custom code with device_match_acpi_handle()
i2c: acpi: Replace custom function with device_match_acpi_handle()
driver core: Provide device_match_acpi_handle() helper
dyndbg: fix spurious vNpr_info change
dyndbg: no vpr-info on empty queries
dyndbg: vpr-info on remove-module complete, not starting
device property: Add missed header in fwnode.h
Documentation: dyndbg: Improve cli param examples
dyndbg: Remove support for ddebug_query param
dyndbg: make dyndbg a known cli param
dyndbg: show module in vpr-info in dd-exec-queries
...
|
||
|
Linus Torvalds
|
d7e0a795bf |
ARM:
* More progress on the protected VM front, now with the full
fixed feature set as well as the limitation of some hypercalls
after initialisation.
* Cleanup of the RAZ/WI sysreg handling, which was pointlessly
complicated
* Fixes for the vgic placement in the IPA space, together with a
bunch of selftests
* More memcg accounting of the memory allocated on behalf of a guest
* Timer and vgic selftests
* Workarounds for the Apple M1 broken vgic implementation
* KConfig cleanups
* New kvmarm.mode=none option, for those who really dislike us
RISC-V:
* New KVM port.
x86:
* New API to control TSC offset from userspace
* TSC scaling for nested hypervisors on SVM
* Switch masterclock protection from raw_spin_lock to seqcount
* Clean up function prototypes in the page fault code and avoid
repeated memslot lookups
* Convey the exit reason to userspace on emulation failure
* Configure time between NX page recovery iterations
* Expose Predictive Store Forwarding Disable CPUID leaf
* Allocate page tracking data structures lazily (if the i915
KVM-GT functionality is not compiled in)
* Cleanups, fixes and optimizations for the shadow MMU code
s390:
* SIGP Fixes
* initial preparations for lazy destroy of secure VMs
* storage key improvements/fixes
* Log the guest CPNC
Starting from this release, KVM-PPC patches will come from
Michael Ellerman's PPC tree.
-----BEGIN PGP SIGNATURE-----
iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmGBOiEUHHBib256aW5p
QHJlZGhhdC5jb20ACgkQv/vSX3jHroNowwf/axlx3g9sgCwQHr12/6UF/7hL/RwP
9z+pGiUzjl2YQE+RjSvLqyd6zXh+h4dOdOKbZDLSkSTbcral/8U70ojKnQsXM0XM
1LoymxBTJqkgQBLm9LjYreEbzrPV4irk4ygEmuk3CPOHZu8xX1ei6c5LdandtM/n
XVUkXsQY+STkmnGv4P3GcPoDththCr0tBTWrFWtxa0w9hYOxx0ay1AZFlgM4FFX0
QFuRc8VBLoDJpIUjbkhsIRIbrlHc/YDGjuYnAU7lV/CIME8vf2BW6uBwIZJdYcDj
0ejozLjodEnuKXQGnc8sXFioLX2gbMyQJEvwCgRvUu/EU7ncFm1lfs7THQ==
=UxKM
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM updates from Paolo Bonzini:
"ARM:
- More progress on the protected VM front, now with the full fixed
feature set as well as the limitation of some hypercalls after
initialisation.
- Cleanup of the RAZ/WI sysreg handling, which was pointlessly
complicated
- Fixes for the vgic placement in the IPA space, together with a
bunch of selftests
- More memcg accounting of the memory allocated on behalf of a guest
- Timer and vgic selftests
- Workarounds for the Apple M1 broken vgic implementation
- KConfig cleanups
- New kvmarm.mode=none option, for those who really dislike us
RISC-V:
- New KVM port.
x86:
- New API to control TSC offset from userspace
- TSC scaling for nested hypervisors on SVM
- Switch masterclock protection from raw_spin_lock to seqcount
- Clean up function prototypes in the page fault code and avoid
repeated memslot lookups
- Convey the exit reason to userspace on emulation failure
- Configure time between NX page recovery iterations
- Expose Predictive Store Forwarding Disable CPUID leaf
- Allocate page tracking data structures lazily (if the i915 KVM-GT
functionality is not compiled in)
- Cleanups, fixes and optimizations for the shadow MMU code
s390:
- SIGP Fixes
- initial preparations for lazy destroy of secure VMs
- storage key improvements/fixes
- Log the guest CPNC
Starting from this release, KVM-PPC patches will come from Michael
Ellerman's PPC tree"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (227 commits)
RISC-V: KVM: fix boolreturn.cocci warnings
RISC-V: KVM: remove unneeded semicolon
RISC-V: KVM: Fix GPA passed to __kvm_riscv_hfence_gvma_xyz() functions
RISC-V: KVM: Factor-out FP virtualization into separate sources
KVM: s390: add debug statement for diag 318 CPNC data
KVM: s390: pv: properly handle page flags for protected guests
KVM: s390: Fix handle_sske page fault handling
KVM: x86: SGX must obey the KVM_INTERNAL_ERROR_EMULATION protocol
KVM: x86: On emulation failure, convey the exit reason, etc. to userspace
KVM: x86: Get exit_reason as part of kvm_x86_ops.get_exit_info
KVM: x86: Clarify the kvm_run.emulation_failure structure layout
KVM: s390: Add a routine for setting userspace CPU state
KVM: s390: Simplify SIGP Set Arch handling
KVM: s390: pv: avoid stalls when making pages secure
KVM: s390: pv: avoid stalls for kvm_s390_pv_init_vm
KVM: s390: pv: avoid double free of sida page
KVM: s390: pv: add macros for UVC CC values
s390/mm: optimize reset_guest_reference_bit()
s390/mm: optimize set_guest_storage_key()
s390/mm: no need for pte_alloc_map_lock() if we know the pmd is present
...
|
||
|
Linus Torvalds
|
a5a9e00605 |
seccomp updates for v5.16-rc1
- set spec_store_bypass_disable & spectre_v2_user to prctl (Andrea Arcangeli) -----BEGIN PGP SIGNATURE----- iQJKBAABCgA0FiEEpcP2jyKd1g9yPm4TiXL039xtwCYFAmGAGAkWHGtlZXNjb29r QGNocm9taXVtLm9yZwAKCRCJcvTf3G3AJqOWD/4mMFp84IMa/VdCmD6PS+BhisyI i7+Hyfisg8AWpjgW4+JihU/6hfsDgs/hNNKbiIopcwc/12KV4M0QIQyF7vmceSwB uMsAX7pkobNUUisnrQVbw6boK4hrBvrV3STlVdRHvNlLeQLQIu4UN3+9UMj/qsmh 46ltdxR489oDDLXFgMkKq9auVP2t5t4fbyRmgBPLSKIXaOxIhWck3kUQwt/Rbr44 M87/Xr4iQ0w4ddiBFJz9GOHQ5Iz08ms4dBfO+e5FSl6I69Nt6q836el35c/6j4y8 r7C21WU088MSkjk75RCa3v2sq8db2CjLe+wBugq+yYC29qGgxtTiUZaoiNQCN5bL DIRfl1iU5Ge1wEKorpr3DR6DksmfJO4MNPdMo4CcVZT3Gkdi7udLHfrEI82xgdDl lh1UiJlRx4YNEcDbGBnxCzKGwauqHa2TgPNWulUPdH7OGhUL86FAV49L84uz9lCD C/+PKxDqc2XKjbgqMsbuyQ7hzB2KQK/ieEXzduoHxTxIr5vO/viENrbkUiSL8bsO 6msCVbCIjtFDvW4Ac16IOwGoflJ7vLAIuXIdAYCeN+JXqOVV+FG/MN447Y674FeH R84G6JCT82ULEXrKlwuoSSVJEwA5lzP4IwoWm/ujeUbzi1s+7m+7WRpuJe2jZm6c zPsCVkNPUrvp82L/wA== =NAsc -----END PGP SIGNATURE----- Merge tag 'seccomp-v5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull seccomp updates from Kees Cook: "These are x86-specific, but I carried these since they're also seccomp-specific. This flips the defaults for spec_store_bypass_disable and spectre_v2_user from "seccomp" to "prctl", as enough time has passed to allow system owners to have updated the defensive stances of their various workloads, and it's long overdue to unpessimize seccomp threads. Extensive rationale and details are in Andrea's main patch. Summary: - set spec_store_bypass_disable & spectre_v2_user to prctl (Andrea Arcangeli)" * tag 'seccomp-v5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: x86: deduplicate the spectre_v2_user documentation x86: change default to spec_store_bypass_disable=prctl spectre_v2_user=prctl |
||
J. Bruce Fields
|
6d91929a6f |
nfsd: document server-to-server-copy parameters
Signed-off-by: J. Bruce Fields <bfields@redhat.com> |
||
Paolo Bonzini
|
4e33868433 |
KVM/arm64 updates for Linux 5.16
- More progress on the protected VM front, now with the full fixed feature set as well as the limitation of some hypercalls after initialisation. - Cleanup of the RAZ/WI sysreg handling, which was pointlessly complicated - Fixes for the vgic placement in the IPA space, together with a bunch of selftests - More memcg accounting of the memory allocated on behalf of a guest - Timer and vgic selftests - Workarounds for the Apple M1 broken vgic implementation - KConfig cleanups - New kvmarm.mode=none option, for those who really dislike us -----BEGIN PGP SIGNATURE----- iQJDBAABCgAtFiEEn9UcU+C1Yxj9lZw9I9DQutE9ekMFAmF7u5YPHG1hekBrZXJu ZWwub3JnAAoJECPQ0LrRPXpD6w8QAIKDLJCTqkxv5Vh4ZSmtXxg4gTZMBlg8oSQ8 sVL639aqBvFe3A6Vmz6IwBm+NT7Sm1zxkuH9qHzVR1gmXq0oLYNrIuyrzRW8PvqO hIkSRRoVsf03755TmkxwR7/2jAFxb6FhEVAy6VWdQyI44orihIPvMp8aTIq+jvU+ XoNGb/rPf9HpSUtvuaHYvZhSZBhoi5dRnkr33R1+VR69n7Axs8lm905xcl6Pt0a0 QqYZWQvFu/BXPyNflG7LUsegRF/iiV2vNTbNNowkzlV5suqxBpJAp6ApDL/gWrHv ya/6cMqicSjBIkWnawhXY98w6/5xfzK4IV/zc00FNWOlUdVP89Thqrgc8EkigS9R BGcxFFqj41snr+ensSBBIkNtV+dBX52H3rUE0F9seiTXm8QWI86JobdeNadT8tUP TXdOeCUcA+cp4Ngln18lsbOEaBkPA5H1po1nUFPHbKnVOxnqXScB7E/xF6rAbryV m+Z+oidU7MyS/Ev/Da0ww/XFx7cs2ez9EgeQvjcdFAvUMqS6kcXEExvgGYlm+KRQ GBMKPLCNHKdflMANoSpol7MZUmPJ45XoWKW1rntj2r9X+oJW2Z2hEx32xrWDJdqK ixnbjog5kNZb0CjLGsUC90lo2hpRJecaLhAjgTLYaNC1QxGPrt92eat6gnwuMTBc mpADqi7w =qBAO -----END PGP SIGNATURE----- Merge tag 'kvmarm-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD KVM/arm64 updates for Linux 5.16 - More progress on the protected VM front, now with the full fixed feature set as well as the limitation of some hypercalls after initialisation. - Cleanup of the RAZ/WI sysreg handling, which was pointlessly complicated - Fixes for the vgic placement in the IPA space, together with a bunch of selftests - More memcg accounting of the memory allocated on behalf of a guest - Timer and vgic selftests - Workarounds for the Apple M1 broken vgic implementation - KConfig cleanups - New kvmarm.mode=none option, for those who really dislike us |
||
Niklas Schnelle
|
6aefbf1cdf |
s390/pci: add s390_iommu_aperture kernel parameter
Some applications map the same memory area for DMA multiple times while also mapping significant amounts of memory. With our current DMA code these applications will run out of DMA addresses after mapping half of the available memory because the number of DMA mappings is constrained by the number of concurrently active DMA addresses we support which in turn is limited by the minimum of hardware constraints and high_memory. Limiting the number of active DMA addresses to high_memory is only a heuristic to save memory used by the iommu_bitmap and DMA page tables however. This was added under the assumption that it rarely makes sense to DMA map more than system memory. To accommodate special applications which insist on double mapping, which works on other platforms, allow specifying a factor of how many times installed memory is available as DMA address space. Use 0 as a special value to apply no constraints beyond what hardware dictates at the expense of significantly more memory use. Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> |
||
Thomas Gleixner
|
3aac3ebea0 |
x86/signal: Implement sigaltstack size validation
For historical reasons MINSIGSTKSZ is a constant which became already too
small with AVX512 support.
Add a mechanism to enforce strict checking of the sigaltstack size against
the real size of the FPU frame.
The strict check can be enabled via a config option and can also be
controlled via the kernel command line option 'strict_sas_size' independent
of the config switch.
Enabling it might break existing applications which allocate a too small
sigaltstack but 'work' because they never get a signal delivered. Though it
can be handy to filter out binaries which are not yet aware of
AT_MINSIGSTKSZ.
Also the upcoming support for dynamically enabled FPU features requires a
strict sanity check to ensure that:
- Enabling of a dynamic feature, which changes the sigframe size fits
into an enabled sigaltstack
- Installing a too small sigaltstack after a dynamic feature has been
added is not possible.
Implement the base check which is controlled by config and command line
options.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20211021225527.10184-3-chang.seok.bae@intel.com
|
||
Junaid Shahid
|
4dfe4f40d8 |
kvm: x86: mmu: Make NX huge page recovery period configurable
Currently, the NX huge page recovery thread wakes up every minute and zaps 1/nx_huge_pages_recovery_ratio of the total number of split NX huge pages at a time. This is intended to ensure that only a relatively small number of pages get zapped at a time. But for very large VMs (or more specifically, VMs with a large number of executable pages), a period of 1 minute could still result in this number being too high (unless the ratio is changed significantly, but that can result in split pages lingering on for too long). This change makes the period configurable instead of fixing it at 1 minute. Users of large VMs can then adjust the period and/or the ratio to reduce the number of pages zapped at one time while still maintaining the same overall duration for cycling through the entire list. By default, KVM derives a period from the ratio such that a page will remain on the list for 1 hour on average. Signed-off-by: Junaid Shahid <junaids@google.com> Message-Id: <20211020010627.305925-1-junaids@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
||
Greg Kroah-Hartman
|
b5bc8ac25a |
Merge 5.15-rc6 into driver-core-next
We need the driver-core fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
||
Andrew Halaney
|
9c40e1aa84 |
dyndbg: Remove support for ddebug_query param
This param has been deprecated for a very long time now, let's rip it out. Signed-off-by: Andrew Halaney <ahalaney@redhat.com> Signed-off-by: Jason Baron <jbaron@akamai.com> Link: https://lore.kernel.org/r/1634139622-20667-3-git-send-email-jbaron@akamai.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
||
|
Marc Zyngier
|
cd67e9af77 |
Merge branch kvm-arm64/pkvm/restrict-hypercalls into kvmarm-master/next
* kvm-arm64/pkvm/restrict-hypercalls: : . : Restrict the use of some hypercalls as well as kexec once : the protected KVM mode has been initialised. : . Documentation: admin-guide: Document side effects when pKVM is enabled Signed-off-by: Marc Zyngier <maz@kernel.org> |
||
Alexandru Elisei
|
53e8ce137f |
Documentation: admin-guide: Document side effects when pKVM is enabled
Recent changes to KVM for arm64 has made it impossible for the host to hibernate or use kexec when protected mode is enabled via the kernel command line. There are people who rely on kexec (for example, developers who use kexec as a quick way to test a new kernel), let's document this change in behaviour, so it doesn't catch them by surprise and we have a place to point people to if it does. Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211011153835.291147-1-alexandru.elisei@arm.com |
||
|
Marc Zyngier
|
b6a68b97af |
KVM: arm64: Allow KVM to be disabled from the command line
Although KVM can be compiled out of the kernel, it cannot be disabled at runtime. Allow this possibility by introducing a new mode that will prevent KVM from initialising. This is useful in the (limited) circumstances where you don't want KVM to be available (what is wrong with you?), or when you want to install another hypervisor instead (good luck with that). Reviewed-by: David Brazdil <dbrazdil@google.com> Acked-by: Will Deacon <will@kernel.org> Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Andrew Scull <ascull@google.com> Link: https://lore.kernel.org/r/20211001170553.3062988-1-maz@kernel.org |
||
|
Linus Torvalds
|
3946b46cab |
xen: branch for v5.15-rc5
-----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRTLbB6QfY48x44uB6AXGG7T9hjvgUCYWBSIwAKCRCAXGG7T9hj vrXxAP9na1EqRJ+SpWyvxHY1jMaIrbg1bgnOc+GsnWxU5liW5AEA4h1HjHtVtrzL 3vweIS6u2fanrWlYML/daQ3r6EuLPQc= =iXsP -----END PGP SIGNATURE----- Merge tag 'for-linus-5.15b-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull xen fixes from Juergen Gross: - fix two minor issues in the Xen privcmd driver plus a cleanup patch for that driver - fix multiple issues related to running as PVH guest and some related earlyprintk fixes for other Xen guest types - fix an issue introduced in 5.15 the Xen balloon driver * tag 'for-linus-5.15b-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen/balloon: fix cancelled balloon action xen/x86: adjust data placement x86/PVH: adjust function/data placement xen/x86: hook up xen_banner() also for PVH xen/x86: generalize preferred console model from PV to PVH Dom0 xen/x86: make "earlyprintk=xen" work for HVM/PVH DomU xen/x86: allow "earlyprintk=xen" to work for PV Dom0 xen/x86: make "earlyprintk=xen" work better for PVH Dom0 xen/x86: allow PVH Dom0 without XEN_PV=y xen/x86: prevent PVH type from getting clobbered xen/privcmd: drop "pages" parameter from xen_remap_pfn() xen/privcmd: fix error handling in mmap-resource processing xen/privcmd: replace kcalloc() by kvcalloc() when allocating empty pages |
||
Jan Beulich
|
42bc9716bc |
xen/x86: make "earlyprintk=xen" work for HVM/PVH DomU
xenboot_write_console() is dealing with these quite fine so I don't see why xenboot_console_setup() would return -ENOENT in this case. Adjust documentation accordingly. Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/3d212583-700e-8b2d-727a-845ef33ac265@suse.com Signed-off-by: Juergen Gross <jgross@suse.com> |
||
Andrea Arcangeli
|
2f46993d83 |
x86: change default to spec_store_bypass_disable=prctl spectre_v2_user=prctl
Switch the kernel default of SSBD and STIBP to the ones with CONFIG_SECCOMP=n (i.e. spec_store_bypass_disable=prctl spectre_v2_user=prctl) even if CONFIG_SECCOMP=y. Several motivations listed below: - If SMT is enabled the seccomp jail can still attack the rest of the system even with spectre_v2_user=seccomp by using MDS-HT (except on XEON PHI where MDS can be tamed with SMT left enabled, but that's a special case). Setting STIBP become a very expensive window dressing after MDS-HT was discovered. - The seccomp jail cannot attack the kernel with spectre-v2-HT regardless (even if STIBP is not set), but with MDS-HT the seccomp jail can attack the kernel too. - With spec_store_bypass_disable=prctl the seccomp jail can attack the other userland (guest or host mode) using spectre-v2-HT, but the userland attack is already mitigated by both ASLR and pid namespaces for host userland and through virt isolation with libkrun or kata. (if something if somebody is worried about spectre-v2-HT it's best to mount proc with hidepid=2,gid=proc on workstations where not all apps may run under container runtimes, rather than slowing down all seccomp jails, but the best is to add pid namespaces to the seccomp jail). As opposed MDS-HT is not mitigated and the seccomp jail can still attack all other host and guest userland if SMT is enabled even with spec_store_bypass_disable=seccomp. - If full security is required then MDS-HT must also be mitigated with nosmt and then spectre_v2_user=prctl and spectre_v2_user=seccomp would become identical. - Setting spectre_v2_user=seccomp is overall lower priority than to setting javascript.options.wasm false in about:config to protect against remote wasm MDS-HT, instead of worrying about Spectre-v2-HT and STIBP which again is already statistically well mitigated by other means in userland and it's fully mitigated in kernel with retpolines (unlike the wasm assist call with MDS-HT). - SSBD is needed to prevent reading the JIT memory and the primary user being the OpenJDK. However the primary user of SSBD wouldn't be covered by spec_store_bypass_disable=seccomp because it doesn't use seccomp and the primary user also explicitly declined to set PR_SET_SPECULATION_CTRL+PR_SPEC_STORE_BYPASS despite it easily could. In fact it would need to set it only when the sandboxing mechanism is enabled for javaws applets, but it still declined it by declaring security within the same user address space as an untenable objective for their JIT, even in the sandboxing case where performance would be a lesser concern (for the record: I kind of disagree in not setting PR_SPEC_STORE_BYPASS in the sandbox case and I prefer to run javaws through a wrapper that sets PR_SPEC_STORE_BYPASS if I need). In turn it can be inferred that even if the primary user of SSBD would use seccomp, they would invoke it with SECCOMP_FILTER_FLAG_SPEC_ALLOW by now. - runc/crun already set SECCOMP_FILTER_FLAG_SPEC_ALLOW by default, k8s and podman have a default json seccomp allowlist that cannot be slowed down, so for the #1 seccomp user this change is already a noop. - systemd/sshd or other apps that use seccomp, if they really need STIBP or SSBD, they need to explicitly set the PR_SET_SPECULATION_CTRL by now. The stibp/ssbd seccomp blind catch-all approach was done probably initially with a wishful thinking objective to pretend to have a peace of mind that it could magically fix it all. That was wishful thinking before MDS-HT was discovered, but after MDS-HT has been discovered it become just window dressing. - For qemu "-sandbox" seccomp jail it wouldn't make sense to set STIBP or SSBD. SSBD doesn't help with KVM because there's no JIT (if it's needed with TCG it should be an opt-in with PR_SET_SPECULATION_CTRL+PR_SPEC_STORE_BYPASS and it shouldn't slowdown KVM for nothing). For qemu+KVM STIBP would be even more window dressing than it is for all other apps, because in the qemu+KVM case there's not only the MDS attack to worry about with SMT enabled. Even after disabling SMT, there's still a theoretical spectre-v2 attack possible within the same thread context from guest mode to host ring3 that the host kernel retpoline mitigation has no theoretical chance to mitigate. On some kernels a ibrs-always/ibrs-retpoline opt-in model is provided that will enabled IBRS in the qemu host ring3 userland which fixes this theoretical concern. Only after enabling IBRS in the host userland it would then make sense to proceed and worry about STIBP and an attack on the other host userland, but then again SMT would need to be disabled for full security anyway, so that would render STIBP again a noop. - last but not the least: the lack of "spec_store_bypass_disable=prctl spectre_v2_user=prctl" means the moment a guest boots and sshd/systemd runs, the guest kernel will write to SPEC_CTRL MSR which will make the guest vmexit forever slower, forcing KVM to issue a very slow rdmsr instruction at every vmexit. So the end result is that SPEC_CTRL MSR is only available in GCE. Most other public cloud providers don't expose SPEC_CTRL, which means that not only STIBP/SSBD isn't available, but IBPB isn't available either (which would cause no overhead to the guest or the hypervisor because it's write only and requires no reading during vmexit). So the current default already net loss in security (missing IBPB) which means most public cloud providers cannot achieve a fully secure guest with nosmt (and nosmt is enough to fully mitigate MDS-HT). It also means GCE and is unfairly penalized in performance because it provides the option to enable full security in the guest as an opt-in (i.e. nosmt and IBPB). So this change will allow all cloud providers to expose SPEC_CTRL without incurring into any hypervisor slowdown and at the same time it will remove the unfair penalization of GCE performance for doing the right thing and it'll allow to get full security with nosmt with IBPB being available (and STIBP becoming meaningless). Example to put things in prospective: the STIBP enabled in seccomp has never been about protecting apps using seccomp like sshd from an attack from a malicious userland, but to the contrary it has always been about protecting the system from an attack from sshd, after a successful remote network exploit against sshd. In fact initially it wasn't obvious STIBP would work both ways (STIBP was about preventing the task that runs with STIBP to be attacked with spectre-v2-HT, but accidentally in the STIBP case it also prevents the attack in the other direction). In the hypothetical case that sshd has been remotely exploited the last concern should be STIBP being set, because it'll be still possible to obtain info even from the kernel by using MDS if nosmt wasn't set (and if it was set, STIBP is a noop in the first place). As opposed kernel cannot leak anything with spectre-v2 HT because of retpolines and the userland is mitigated by ASLR already and ideally PID namespaces too. If something it'd be worth checking if sshd run the seccomp thread under pid namespaces too if available in the running kernel. SSBD also would be a noop for sshd, since sshd uses no JIT. If sshd prefers to keep doing the STIBP window dressing exercise, it still can even after this change of defaults by opting-in with PR_SPEC_INDIRECT_BRANCH. Ultimately setting SSBD and STIBP by default for all seccomp jails is a bad sweet spot and bad default with more cons than pros that end up reducing security in the public cloud (by giving an huge incentive to not expose SPEC_CTRL which would be needed to get full security with IBPB after setting nosmt in the guest) and by excessively hurting performance to more secure apps using seccomp that end up having to opt out with SECCOMP_FILTER_FLAG_SPEC_ALLOW. The following is the verified result of the new default with SMT enabled: (gdb) print spectre_v2_user_stibp $1 = SPECTRE_V2_USER_PRCTL (gdb) print spectre_v2_user_ibpb $2 = SPECTRE_V2_USER_PRCTL (gdb) print ssb_mode $3 = SPEC_STORE_BYPASS_PRCTL Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20201104235054.5678-1-aarcange@redhat.com Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Link: https://lore.kernel.org/lkml/AAA2EF2C-293D-4D5B-BFA6-FF655105CD84@redhat.com Acked-by: Waiman Long <longman@redhat.com> Link: https://lore.kernel.org/lkml/c0722838-06f7-da6b-138f-e0f26362f16a@redhat.com |
||
|
Linus Torvalds
|
0aa2516017 |
dmaengine updates for v5.15-rc1
New drivers/devices - Support for Renesas RZ/G2L dma controller - New driver for AMD PTDMA controller Updates: - Big pile of idxd updates - Updates for Altera driver, stm32-dma, dw etc Also contains, bus_remove_return_void-5.15 to resolve dependencies -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEE+vs47OPLdNbVcHzyfBQHDyUjg0cFAmE4PBwACgkQfBQHDyUj g0euABAArP/f4o6yxtlPj5hwk2ZLw4QRTZEFevn0qULuwHazxGSKVhJEZVz2asYM S6I6jSvfKYwdO8/s3EVV0jkz4Uxdl4JUzakeMbEsISNF+hacgIhTxuXkgQkvAre9 N3/WQgHLRShe+P3mbX/uN4JyXSMQoWCPUy3yk5xxQvuyBy9zgiW8c5rMiwDNsG3c wF+kX8520Py1QlcK+q5wF+giklAcraPV+buAvJysOukQwxMQjSd2SIMG63Xa+cNx ssvj39au9VInfKYyVioWIUdNQcTRa8+3Ctv6eI44F77x9LfvjBsOLT/dy+BbOCCQ 7zHAlrBJ6UhpGi7WHk+Tnb4RispjdWNAdEvqWU/EHZNk2II/Lb8IJjDnu3wSuXKy AU1uiQ8b6uEY5rKj1lc7XxKw0xGArJEUt7r24z6KNQ7kiYOD4z7G759syGC5atml q5m0rY8I7zI7OGhPJIpaAOh+urdWLsdVvgywRoHrKS0NiUXVAAkfbmvHgm5WboLu INDbm/HWdqvxo2LqnBj/+NSArhvFfrQyUt/po6lYkPddbG0xARAWsjqra+X8XTvR n4P/qlydzCl9QkJGnfM6JrsKGikegNnFvXMUR9kO6Go6IGM9Ea8JD4K6GYk84+yy jrSFJCQsS54I97UIRAGrpGW6qVQUYsFiPUtSM2cCuBOwTG03Wz4= =RYbR -----END PGP SIGNATURE----- Merge tag 'dmaengine-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine Pull dmaengine updates from Vinod Koul: "New drivers/devices - Support for Renesas RZ/G2L dma controller - New driver for AMD PTDMA controller Updates: - Big pile of idxd updates - Updates for Altera driver, stm32-dma, dw etc" * tag 'dmaengine-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (83 commits) dmaengine: sh: fix some NULL dereferences dmaengine: sh: Fix unused initialization of pointer lmdesc MAINTAINERS: Fix AMD PTDMA DRIVER entry dmaengine: ptdma: remove PT_OFFSET to avoid redefnition dmaengine: ptdma: Add debugfs entries for PTDMA dmaengine: ptdma: register PTDMA controller as a DMA resource dmaengine: ptdma: Initial driver for the AMD PTDMA dmaengine: fsl-dpaa2-qdma: Fix spelling mistake "faile" -> "failed" dmaengine: idxd: remove interrupt disable for dev_lock dmaengine: idxd: remove interrupt disable for cmd_lock dmaengine: idxd: fix setting up priv mode for dwq dmaengine: xilinx_dma: Set DMA mask for coherent APIs dmaengine: ti: k3-psil-j721e: Add entry for CSI2RX dmaengine: sh: Add DMAC driver for RZ/G2L SoC dmaengine: Extend the dma_slave_width for 128 bytes dt-bindings: dma: Document RZ/G2L bindings dmaengine: ioat: depends on !UML dmaengine: idxd: set descriptor allocation size to threshold for swq dmaengine: idxd: make submit failure path consistent on desc freeing dmaengine: idxd: remove interrupt flag for completion list spinlock ... |
||
|
Linus Torvalds
|
69a5c49a91 |
IOMMU Updates for Linux v5.15
Including:
- New DART IOMMU driver for Apple Silicon M1 chips.
- Optimizations for iommu_[map/unmap] performance
- Selective TLB flush support for the AMD IOMMU driver to make
it more efficient on emulated IOMMUs.
- Rework IOVA setup and default domain type setting to move more
code out of IOMMU drivers and to support runtime switching
between certain types of default domains.
- VT-d Updates from Lu Baolu:
- Update the virtual command related registers
- Enable Intel IOMMU scalable mode by default
- Preset A/D bits for user space DMA usage
- Allow devices to have more than 32 outstanding PRs
- Various cleanups
- ARM SMMU Updates from Will Deacon:
- SMMUv3: Minor optimisation to avoid zeroing struct members on CMD submission
- SMMUv3: Increased use of batched commands to reduce submission latency
- SMMUv3: Refactoring in preparation for ECMDQ support
- SMMUv2: Fix races when probing devices with identical StreamIDs
- SMMUv2: Optimise walk cache flushing for Qualcomm implementations
- SMMUv2: Allow deep sleep states for some Qualcomm SoCs with shared clocks
- Various smaller optimizations, cleanups, and fixes
-----BEGIN PGP SIGNATURE-----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=zVaQ
-----END PGP SIGNATURE-----
Merge tag 'iommu-updates-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu updates from Joerg Roedel:
- New DART IOMMU driver for Apple Silicon M1 chips
- Optimizations for iommu_[map/unmap] performance
- Selective TLB flush support for the AMD IOMMU driver to make it more
efficient on emulated IOMMUs
- Rework IOVA setup and default domain type setting to move more code
out of IOMMU drivers and to support runtime switching between certain
types of default domains
- VT-d Updates from Lu Baolu:
- Update the virtual command related registers
- Enable Intel IOMMU scalable mode by default
- Preset A/D bits for user space DMA usage
- Allow devices to have more than 32 outstanding PRs
- Various cleanups
- ARM SMMU Updates from Will Deacon:
SMMUv3:
- Minor optimisation to avoid zeroing struct members on CMD submission
- Increased use of batched commands to reduce submission latency
- Refactoring in preparation for ECMDQ support
SMMUv2:
- Fix races when probing devices with identical StreamIDs
- Optimise walk cache flushing for Qualcomm implementations
- Allow deep sleep states for some Qualcomm SoCs with shared clocks
- Various smaller optimizations, cleanups, and fixes
* tag 'iommu-updates-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (85 commits)
iommu/io-pgtable: Abstract iommu_iotlb_gather access
iommu/arm-smmu: Fix missing unlock on error in arm_smmu_device_group()
iommu/vt-d: Add present bit check in pasid entry setup helpers
iommu/vt-d: Use pasid_pte_is_present() helper function
iommu/vt-d: Drop the kernel doc annotation
iommu/vt-d: Allow devices to have more than 32 outstanding PRs
iommu/vt-d: Preset A/D bits for user space DMA usage
iommu/vt-d: Enable Intel IOMMU scalable mode by default
iommu/vt-d: Refactor Kconfig a bit
iommu/vt-d: Remove unnecessary oom message
iommu/vt-d: Update the virtual command related registers
iommu: Allow enabling non-strict mode dynamically
iommu: Merge strictness and domain type configs
iommu: Only log strictness for DMA domains
iommu: Expose DMA domain strictness via sysfs
iommu: Express DMA strictness via the domain type
iommu/vt-d: Prepare for multiple DMA domain types
iommu/arm-smmu: Prepare for multiple DMA domain types
iommu/amd: Prepare for multiple DMA domain types
iommu: Introduce explicit type for non-strict DMA domains
...
|
||
|
Linus Torvalds
|
df43d90382 |
printk changes for 5.15
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEESH4wyp42V4tXvYsjUqAMR0iAlPIFAmEt+hwACgkQUqAMR0iA lPLppBAAiyrUNVmqqtdww+IJajEs1uD/4FqPsysHRwroHBFymJeQG1XCwUpDZ7jj 6gXT0chxyjQE18gT/W9nf+PSmA9XvIVA1WSR+WCECTNW3YoZXqtgwiHfgnitXYku HlmoZLthYeuoXWw2wn+hVLfTRh6VcPHYEaC21jXrs6B1pOXHbvjJ5eTLHlX9oCfL UKSK+jFTHAJcn/GskRzviBe0Hpe8fqnkRol2XX13ltxqtQ73MjaGNu7imEH6/Pa7 /MHXWtuWJtOvuYz17aztQP4Qwh1xy+kakMy3aHucdlxRBTP4PTzzTuQI3L/RYi6l +ttD7OHdRwqFAauBLY3bq3uJjYb5v/64ofd8DNnT2CJvtznY8wrPbTdFoSdPcL2Q 69/opRWHcUwbU/Gt4WLtyQf3Mk0vepgMbbVg1B5SSy55atRZaXMrA2QJ/JeawZTB KK6D/mE7ccze/YFzsySunCUVKCm0veoNxEAcakCCZKXSbsvd1MYcIRC0e+2cv6e5 2NEH7gL4dD+5tqu5nzvIuKDn3NrDQpbi28iUBoFbkxRgcVyvHJ9AGSa62wtb5h3D OgkqQMdVKBbjYNeUodPlQPzmXZDasytavyd0/BC/KENOcBvU/8gW++2UZTfsh/1A dLjgwFBdyJncQcCS9Abn20/EKntbIMEX8NLa97XWkA3fuzMKtak= =yEVq -----END PGP SIGNATURE----- Merge tag 'printk-for-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux Pull printk updates from Petr Mladek: - Optionally, provide an index of possible printk messages via <debugfs>/printk/index/. It can be used when monitoring important kernel messages on a farm of various hosts. The monitor has to be updated when some messages has changed or are not longer available by a newly deployed kernel. - Add printk.console_no_auto_verbose boot parameter. It allows to generate crash dump even with slow consoles in a reasonable time frame. - Remove printk_safe buffers. The messages are always stored directly to the main logbuffer, even in NMI or recursive context. Also it allows to serialize syslog operations by a mutex instead of a spin lock. - Misc clean up and build fixes. * tag 'printk-for-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux: printk/index: Fix -Wunused-function warning lib/nmi_backtrace: Serialize even messages about idle CPUs printk: Add printk.console_no_auto_verbose boot parameter printk: Remove console_silent() lib/test_scanf: Handle n_bits == 0 in random tests printk: syslog: close window between wait and read printk: convert @syslog_lock to mutex printk: remove NMI tracking printk: remove safe buffers printk: track/limit recursion lib/nmi_backtrace: explicitly serialize banner and regs printk: Move the printk() kerneldoc comment to its new home printk/index: Fix warning about missing prototypes MIPS/asm/printk: Fix build failure caused by printk printk: index: Add indexing support to dev_printk printk: Userspace format indexing support printk: Rework parse_prefix into printk_parse_prefix printk: Straighten out log_flags into printk_info_flags string_helpers: Escape double quotes in escape_special printk/console: Check consistent sequence number when handling race in console_unlock() |
||
|
Linus Torvalds
|
57c78a234e |
arm64 updates for 5.15:
- Support for 32-bit tasks on asymmetric AArch32 systems (on top of the scheduler changes merged via the tip tree). - More entry.S clean-ups and conversion to C. - MTE updates: allow a preferred tag checking mode to be set per CPU (the overhead of synchronous mode is smaller for some CPUs than others); optimisations for kernel entry/exit path; optionally disable MTE on the kernel command line. - Kselftest improvements for SVE and signal handling, PtrAuth. - Fix unlikely race where a TLBI could use stale ASID on an ASID roll-over (found by inspection). - Miscellaneous fixes: disable trapping of PMSNEVFR_EL1 to higher exception levels; drop unnecessary sigdelsetmask() call in the signal32 handling; remove BUG_ON when failing to allocate SVE state (just signal the process); SYM_CODE annotations. - Other trivial clean-ups: use macros instead of magic numbers, remove redundant returns, typos. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE5RElWfyWxS+3PLO2a9axLQDIXvEFAmEuYkoACgkQa9axLQDI XvEWVw/9HSWbccLrQ68ulaqZkL4r6lL2RqvZ2p6fkIRW7bX1JS4UJjWe3+VBg5Ed DQ1A5cHC5ZndQ4gCRsUhcq7IMXBSj3twMzK7yxBk3zh8tbhVrIOONsKMurMw1NyM OmoyTJ01i2ZrkDs0OU3fBlvIHPxBjKbOZqykOJHjrB2rwBSbsyUw2KvpM7ha8DOf O7gKViDrdAhumdIL9rsMvSiIPoJLCxvqeu55c3saVu1JrUR6ENu7lMu3jt4WrfK3 m5gf76IFbgxXvlLiC8RJW7OYaXZ+COb7RA/yP/lK+Y0ug9PwqTpzXDwqvAp8nBIv y7DK0umcBwfDWmwnRO+ZzNPjOGTHnOnjC07WNBPn3v03pMeJ8v8RnvzHkliek31P r6uFWBxWO/O0sBbSpR+4tzgNfir0RkMajwL5pxQCEMoPCucStYQQl8zIeJeJecpT DKIyKzfFw6O59gdhE6dCj2wXH8YmKUoSUPCAXpKGzK/oYVOGVQTZSZjIC++ydFWv AOXz77etPidk3/Tl15Ena7fkkMkxX9UM8dTjOFS64mSWlEyzE6FtfAgm2rIEOaG7 ps6IjVzVves39SC+yry8T2L6gsxPnanRfwKKCWHkovQzNFgs5Qt51Fd5eIeI1jZ0 uEZhd19FN4136QhjWJOeXL/eyj0bv1WLX/mUln95sHnKyf4je9w= =X6Wm -----END PGP SIGNATURE----- Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 updates from Catalin Marinas: - Support for 32-bit tasks on asymmetric AArch32 systems (on top of the scheduler changes merged via the tip tree). - More entry.S clean-ups and conversion to C. - MTE updates: allow a preferred tag checking mode to be set per CPU (the overhead of synchronous mode is smaller for some CPUs than others); optimisations for kernel entry/exit path; optionally disable MTE on the kernel command line. - Kselftest improvements for SVE and signal handling, PtrAuth. - Fix unlikely race where a TLBI could use stale ASID on an ASID roll-over (found by inspection). - Miscellaneous fixes: disable trapping of PMSNEVFR_EL1 to higher exception levels; drop unnecessary sigdelsetmask() call in the signal32 handling; remove BUG_ON when failing to allocate SVE state (just signal the process); SYM_CODE annotations. - Other trivial clean-ups: use macros instead of magic numbers, remove redundant returns, typos. * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (56 commits) arm64: Do not trap PMSNEVFR_EL1 arm64: mm: fix comment typo of pud_offset_phys() arm64: signal32: Drop pointless call to sigdelsetmask() arm64/sve: Better handle failure to allocate SVE register storage arm64: Document the requirement for SCR_EL3.HCE arm64: head: avoid over-mapping in map_memory arm64/sve: Add a comment documenting the binutils needed for SVE asm arm64/sve: Add some comments for sve_save/load_state() kselftest/arm64: signal: Add a TODO list for signal handling tests kselftest/arm64: signal: Add test case for SVE register state in signals kselftest/arm64: signal: Verify that signals can't change the SVE vector length kselftest/arm64: signal: Check SVE signal frame shows expected vector length kselftest/arm64: signal: Support signal frames with SVE register data kselftest/arm64: signal: Add SVE to the set of features we can check for arm64: replace in_irq() with in_hardirq() kselftest/arm64: pac: Fix skipping of tests on systems without PAC Documentation: arm64: describe asymmetric 32-bit support arm64: Remove logic to kill 32-bit tasks on 64-bit-only cores arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0 arm64: Advertise CPUs capable of running 32-bit applications in sysfs ... |
||
|
Linus Torvalds
|
9e9fb7655e |
Core:
- Enable memcg accounting for various networking objects.
BPF:
- Introduce bpf timers.
- Add perf link and opaque bpf_cookie which the program can read
out again, to be used in libbpf-based USDT library.
- Add bpf_task_pt_regs() helper to access user space pt_regs
in kprobes, to help user space stack unwinding.
- Add support for UNIX sockets for BPF sockmap.
- Extend BPF iterator support for UNIX domain sockets.
- Allow BPF TCP congestion control progs and bpf iterators to call
bpf_setsockopt(), e.g. to switch to another congestion control
algorithm.
Protocols:
- Support IOAM Pre-allocated Trace with IPv6.
- Support Management Component Transport Protocol.
- bridge: multicast: add vlan support.
- netfilter: add hooks for the SRv6 lightweight tunnel driver.
- tcp:
- enable mid-stream window clamping (by user space or BPF)
- allow data-less, empty-cookie SYN with TFO_SERVER_COOKIE_NOT_REQD
- more accurate DSACK processing for RACK-TLP
- mptcp:
- add full mesh path manager option
- add partial support for MP_FAIL
- improve use of backup subflows
- optimize option processing
- af_unix: add OOB notification support.
- ipv6: add IFLA_INET6_RA_MTU to expose MTU value advertised by
the router.
- mac80211: Target Wake Time support in AP mode.
- can: j1939: extend UAPI to notify about RX status.
Driver APIs:
- Add page frag support in page pool API.
- Many improvements to the DSA (distributed switch) APIs.
- ethtool: extend IRQ coalesce uAPI with timer reset modes.
- devlink: control which auxiliary devices are created.
- Support CAN PHYs via the generic PHY subsystem.
- Proper cross-chip support for tag_8021q.
- Allow TX forwarding for the software bridge data path to be
offloaded to capable devices.
Drivers:
- veth: more flexible channels number configuration.
- openvswitch: introduce per-cpu upcall dispatch.
- Add internet mix (IMIX) mode to pktgen.
- Transparently handle XDP operations in the bonding driver.
- Add LiteETH network driver.
- Renesas (ravb):
- support Gigabit Ethernet IP
- NXP Ethernet switch (sja1105)
- fast aging support
- support for "H" switch topologies
- traffic termination for ports under VLAN-aware bridge
- Intel 1G Ethernet
- support getcrosststamp() with PCIe PTM (Precision Time
Measurement) for better time sync
- support Credit-Based Shaper (CBS) offload, enabling HW traffic
prioritization and bandwidth reservation
- Broadcom Ethernet (bnxt)
- support pulse-per-second output
- support larger Rx rings
- Mellanox Ethernet (mlx5)
- support ethtool RSS contexts and MQPRIO channel mode
- support LAG offload with bridging
- support devlink rate limit API
- support packet sampling on tunnels
- Huawei Ethernet (hns3):
- basic devlink support
- add extended IRQ coalescing support
- report extended link state
- Netronome Ethernet (nfp):
- add conntrack offload support
- Broadcom WiFi (brcmfmac):
- add WPA3 Personal with FT to supported cipher suites
- support 43752 SDIO device
- Intel WiFi (iwlwifi):
- support scanning hidden 6GHz networks
- support for a new hardware family (Bz)
- Xen pv driver:
- harden netfront against malicious backends
- Qualcomm mobile
- ipa: refactor power management and enable automatic suspend
- mhi: move MBIM to WWAN subsystem interfaces
Refactor:
- Ambient BPF run context and cgroup storage cleanup.
- Compat rework for ndo_ioctl.
Old code removal:
- prism54 remove the obsoleted driver, deprecated by the p54 driver.
- wan: remove sbni/granch driver.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----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=JDGD
-----END PGP SIGNATURE-----
Merge tag 'net-next-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski:
"Core:
- Enable memcg accounting for various networking objects.
BPF:
- Introduce bpf timers.
- Add perf link and opaque bpf_cookie which the program can read out
again, to be used in libbpf-based USDT library.
- Add bpf_task_pt_regs() helper to access user space pt_regs in
kprobes, to help user space stack unwinding.
- Add support for UNIX sockets for BPF sockmap.
- Extend BPF iterator support for UNIX domain sockets.
- Allow BPF TCP congestion control progs and bpf iterators to call
bpf_setsockopt(), e.g. to switch to another congestion control
algorithm.
Protocols:
- Support IOAM Pre-allocated Trace with IPv6.
- Support Management Component Transport Protocol.
- bridge: multicast: add vlan support.
- netfilter: add hooks for the SRv6 lightweight tunnel driver.
- tcp:
- enable mid-stream window clamping (by user space or BPF)
- allow data-less, empty-cookie SYN with TFO_SERVER_COOKIE_NOT_REQD
- more accurate DSACK processing for RACK-TLP
- mptcp:
- add full mesh path manager option
- add partial support for MP_FAIL
- improve use of backup subflows
- optimize option processing
- af_unix: add OOB notification support.
- ipv6: add IFLA_INET6_RA_MTU to expose MTU value advertised by the
router.
- mac80211: Target Wake Time support in AP mode.
- can: j1939: extend UAPI to notify about RX status.
Driver APIs:
- Add page frag support in page pool API.
- Many improvements to the DSA (distributed switch) APIs.
- ethtool: extend IRQ coalesce uAPI with timer reset modes.
- devlink: control which auxiliary devices are created.
- Support CAN PHYs via the generic PHY subsystem.
- Proper cross-chip support for tag_8021q.
- Allow TX forwarding for the software bridge data path to be
offloaded to capable devices.
Drivers:
- veth: more flexible channels number configuration.
- openvswitch: introduce per-cpu upcall dispatch.
- Add internet mix (IMIX) mode to pktgen.
- Transparently handle XDP operations in the bonding driver.
- Add LiteETH network driver.
- Renesas (ravb):
- support Gigabit Ethernet IP
- NXP Ethernet switch (sja1105):
- fast aging support
- support for "H" switch topologies
- traffic termination for ports under VLAN-aware bridge
- Intel 1G Ethernet
- support getcrosststamp() with PCIe PTM (Precision Time
Measurement) for better time sync
- support Credit-Based Shaper (CBS) offload, enabling HW traffic
prioritization and bandwidth reservation
- Broadcom Ethernet (bnxt)
- support pulse-per-second output
- support larger Rx rings
- Mellanox Ethernet (mlx5)
- support ethtool RSS contexts and MQPRIO channel mode
- support LAG offload with bridging
- support devlink rate limit API
- support packet sampling on tunnels
- Huawei Ethernet (hns3):
- basic devlink support
- add extended IRQ coalescing support
- report extended link state
- Netronome Ethernet (nfp):
- add conntrack offload support
- Broadcom WiFi (brcmfmac):
- add WPA3 Personal with FT to supported cipher suites
- support 43752 SDIO device
- Intel WiFi (iwlwifi):
- support scanning hidden 6GHz networks
- support for a new hardware family (Bz)
- Xen pv driver:
- harden netfront against malicious backends
- Qualcomm mobile
- ipa: refactor power management and enable automatic suspend
- mhi: move MBIM to WWAN subsystem interfaces
Refactor:
- Ambient BPF run context and cgroup storage cleanup.
- Compat rework for ndo_ioctl.
Old code removal:
- prism54 remove the obsoleted driver, deprecated by the p54 driver.
- wan: remove sbni/granch driver"
* tag 'net-next-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1715 commits)
net: Add depends on OF_NET for LiteX's LiteETH
ipv6: seg6: remove duplicated include
net: hns3: remove unnecessary spaces
net: hns3: add some required spaces
net: hns3: clean up a type mismatch warning
net: hns3: refine function hns3_set_default_feature()
ipv6: remove duplicated 'net/lwtunnel.h' include
net: w5100: check return value after calling platform_get_resource()
net/mlxbf_gige: Make use of devm_platform_ioremap_resourcexxx()
net: mdio: mscc-miim: Make use of the helper function devm_platform_ioremap_resource()
net: mdio-ipq4019: Make use of devm_platform_ioremap_resource()
fou: remove sparse errors
ipv4: fix endianness issue in inet_rtm_getroute_build_skb()
octeontx2-af: Set proper errorcode for IPv4 checksum errors
octeontx2-af: Fix static code analyzer reported issues
octeontx2-af: Fix mailbox errors in nix_rss_flowkey_cfg
octeontx2-af: Fix loop in free and unmap counter
af_unix: fix potential NULL deref in unix_dgram_connect()
dpaa2-eth: Replace strlcpy with strscpy
octeontx2-af: Use NDC TX for transmit packet data
...
|
||
Catalin Marinas
|
65266a7c6a |
Merge remote-tracking branch 'tip/sched/arm64' into for-next/core
* tip/sched/arm64: (785 commits) Documentation: arm64: describe asymmetric 32-bit support arm64: Remove logic to kill 32-bit tasks on 64-bit-only cores arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0 arm64: Advertise CPUs capable of running 32-bit applications in sysfs arm64: Prevent offlining first CPU with 32-bit EL0 on mismatched system arm64: exec: Adjust affinity for compat tasks with mismatched 32-bit EL0 arm64: Implement task_cpu_possible_mask() sched: Introduce dl_task_check_affinity() to check proposed affinity sched: Allow task CPU affinity to be restricted on asymmetric systems sched: Split the guts of sched_setaffinity() into a helper function sched: Introduce task_struct::user_cpus_ptr to track requested affinity sched: Reject CPU affinity changes based on task_cpu_possible_mask() cpuset: Cleanup cpuset_cpus_allowed_fallback() use in select_fallback_rq() cpuset: Honour task_cpu_possible_mask() in guarantee_online_cpus() cpuset: Don't use the cpu_possible_mask as a last resort for cgroup v1 sched: Introduce task_cpu_possible_mask() to limit fallback rq selection sched: Cgroup SCHED_IDLE support sched/topology: Skip updating masks for non-online nodes Linux 5.14-rc6 lib: use PFN_PHYS() in devmem_is_allowed() ... |
||
|
Linus Torvalds
|
bed9166741 |
A set of updates for the 86 reboot code:
- Limit the Dell Optiplex 990 quirk to early BIOS versions to avoid the
full 'power cycle' alike reboot which is required for the buggy BIOSes.
- Update documentation for the reboot=pci command line option and
document how DMI platform quirks can be overridden.
-----BEGIN PGP SIGNATURE-----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=Us12
-----END PGP SIGNATURE-----
Merge tag 'x86-misc-2021-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc x86 updates from Thomas Gleixner:
"A set of updates for the x86 reboot code:
- Limit the Dell Optiplex 990 quirk to early BIOS versions to avoid
the full 'power cycle' alike reboot which is required for the buggy
BIOSes.
- Update documentation for the reboot=pci command line option and
document how DMI platform quirks can be overridden"
* tag 'x86-misc-2021-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/reboot: Limit Dell Optiplex 990 quirk to early BIOS versions
x86/reboot: Document how to override DMI platform quirks
x86/reboot: Document the "reboot=pci" option
|
||
Petr Mladek
|
baa99c9267 | Merge branch 'for-5.15-verbose-console' into for-linus | ||
|
Will Deacon
|
702f438726 |
Documentation: arm64: describe asymmetric 32-bit support
Document support for running 32-bit tasks on asymmetric 32-bit systems and its impact on the user ABI when enabled. Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20210730112443.23245-17-will@kernel.org |
||
|
Will Deacon
|
ead7de462a |
arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0
Allow systems with mismatched 32-bit support at EL0 to run 32-bit applications based on a new kernel parameter. Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Link: https://lore.kernel.org/r/20210730112443.23245-15-will@kernel.org |
||
Lu Baolu
|
792fb43ce2 |
iommu/vt-d: Enable Intel IOMMU scalable mode by default
The commit
|
||
Robin Murphy
|
e96763ec42 |
iommu: Merge strictness and domain type configs
To parallel the sysfs behaviour, merge the new build-time option for DMA domain strictness into the default domain type choice. Suggested-by: Joerg Roedel <joro@8bytes.org> Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com> Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Reviewed-by: John Garry <john.garry@huawei.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Link: https://lore.kernel.org/r/d04af35b9c0f2a1d39605d7a9b451f5e1f0c7736.1628682049.git.robin.murphy@arm.com Signed-off-by: Joerg Roedel <jroedel@suse.de> |
||
Paul Gortmaker
|
12febc1818 |
x86/reboot: Document how to override DMI platform quirks
commit
|
||
Yee Lee
|
7a062ce318 |
arm64/cpufeature: Optionally disable MTE via command-line
MTE support needs to be optionally disabled in runtime for HW issue workaround, FW development and some evaluation works on system resource and performance. This patch makes two changes: (1) moves init of tag-allocation bits(ATA/ATA0) to cpu_enable_mte() as not cached in TLB. (2) allows ID_AA64PFR1_EL1.MTE to be overridden on its shadow value by giving "arm64.nomte" on cmdline. When the feature value is off, ATA and TCF will not set and the related functionalities are accordingly suppressed. Suggested-by: Catalin Marinas <catalin.marinas@arm.com> Suggested-by: Marc Zyngier <maz@kernel.org> Suggested-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Yee Lee <yee.lee@mediatek.com> Link: https://lore.kernel.org/r/20210803070824.7586-2-yee.lee@mediatek.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> |
||
Arnd Bergmann
|
72bcad5393 |
wan: remove sbni/granch driver
The driver was merged in 1999 and has only ever seen treewide cleanups since then, with no indication whatsoever that anyone has actually had access to hardware for testing the patches. >From the information in the link below, it appears that the hardware is for some leased line system in Russia that has since been discontinued, and useless without any remote end to connect to. As the driver still feels like a Linux-2.2 era artifact today, it appears that the best way forward is to just delete it. Link: https://www.tms.ru/%D0%90%D0%B4%D0%B0%D0%BF%D1%82%D0%B5%D1%80_%D0%B4%D0%BB%D1%8F_%D0%B2%D1%8B%D0%B4%D0%B5%D0%BB%D0%B5%D0%BD%D0%BD%D1%8B%D1%85_%D0%BB%D0%B8%D0%BD%D0%B8%D0%B9_Granch_SBNI12-10 Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net> |
||
Dmitry Safonov
|
10102a890b |
printk: Add printk.console_no_auto_verbose boot parameter
console_verbose() increases console loglevel to CONSOLE_LOGLEVEL_MOTORMOUTH, which provides more information to debug a panic/oops. Unfortunately, in Arista we maintain some DUTs (Device Under Test) that are configured to have 9600 baud rate. While verbose console messages have their value to post-analyze crashes, on such setup they: - may prevent panic/oops messages being printed - take too long to flush on console resulting in watchdog reboot In all our setups we use kdump which saves dmesg buffer after panic, so in reality those extra messages on console provide no additional value, but rather add risk of not getting to __crash_kexec(). Provide printk.console_no_auto_verbose boot parameter, which allows to switch off printk being verbose on oops/panic/lockdep. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: John Ogness <john.ogness@linutronix.de> Cc: Petr Mladek <pmladek@suse.com> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Dmitry Safonov <dima@arista.com> Suggested-by: Petr Mladek <pmladek@suse.com> Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org> Reviewed-by: Petr Mladek <pmladek@suse.com> Tested-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Petr Mladek <pmladek@suse.com> Link: https://lore.kernel.org/r/20210727130635.675184-3-dima@arista.com |