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* irq/loongarch-fixes-6.4:
: .
: More Loongarch fixes from Lianmin Lv, fixing issues
: in the so called "dual-bridge" systems.
: .
irqchip/loongson-pch-pic: Fix pch_pic_acpi_init calling
irqchip/loongson-pch-pic: Fix registration of syscore_ops
irqchip/loongson-eiointc: Fix registration of syscore_ops
irqchip/loongson-eiointc: Fix incorrect use of acpi_get_vec_parent
irqchip/loongson-eiointc: Fix returned value on parsing MADT
Signed-off-by: Marc Zyngier <maz@kernel.org>
* irq/riscv-ipi:
: .
: RISC-V IPI rework from Anup Patel:
:
: "This series aims to improve IPI support in Linux RISC-V in following ways:
: 1) Treat IPIs as normal per-CPU interrupts instead of having custom RISC-V
: specific hooks. This also makes Linux RISC-V IPI support aligned with
: other architectures.
: 2) Remote TLB flushes and icache flushes should prefer local IPIs instead
: of SBI calls whenever we have specialized hardware (such as RISC-V AIA
: IMSIC and RISC-V SWI) which allows S-mode software to directly inject
: IPIs without any assistance from M-mode runtime firmware."
: .
irqchip/riscv-intc: Add empty irq_eoi() for chained irq handlers
RISC-V: Use IPIs for remote icache flush when possible
RISC-V: Use IPIs for remote TLB flush when possible
RISC-V: Allow marking IPIs as suitable for remote FENCEs
RISC-V: Treat IPIs as normal Linux IRQs
irqchip/riscv-intc: Allow drivers to directly discover INTC hwnode
RISC-V: Clear SIP bit only when using SBI IPI operations
Signed-off-by: Marc Zyngier <maz@kernel.org>
* irq/gic-6.4:
: .
: Collection of GIC/GICv3 fixes and cleanups
:
: - Workaround for the nvidia T241 chip that gets confused
: in 3 and 4 socket configurations, leading to the GIC
: malfunctionning in some contexts
:
: - Drop support for non-firmware driven GIC configurarations
: now that the old ARM11MP Cavium board is gone
:
: - Workaround for the Rockchip 3588 chip that doesn't
: correctly deal with the shareability attributes.
: .
irqchip/gic-v3: Add Rockchip 3588001 erratum workaround
irqchip/gicv3: Workaround for NVIDIA erratum T241-FABRIC-4
irqchip/gic: Drop support for board files
Signed-off-by: Marc Zyngier <maz@kernel.org>
lookups by descriptor are better off closer to syscall surface...
Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
nouveau:
- fix dma-resv timeout
rockchip:
- fix suspend/resume
sched:
- fix timeout handling
i915:
- Fix fast wake AUX sync len
amdgpu:
- GPU reset fix
- DCN 3.1.5 line buffer fix
- Display fix for single channel memory configs
- Fix a possible divide by 0
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Merge tag 'drm-fixes-2023-04-21' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"This is the regular and hopefully last round of fixes for 6.3.
Pretty small, a few amdgpu, one i915, one nouveau, one rockchip and
one gpu scheduler fix:
nouveau:
- fix dma-resv timeout
rockchip:
- fix suspend/resume
sched:
- fix timeout handling
i915:
- Fix fast wake AUX sync len
amdgpu:
- GPU reset fix
- DCN 3.1.5 line buffer fix
- Display fix for single channel memory configs
- Fix a possible divide by 0"
* tag 'drm-fixes-2023-04-21' of git://anongit.freedesktop.org/drm/drm:
drm/amd/display: fix a divided-by-zero error
drm/amd/display: limit timing for single dimm memory
drm/amd/display: set dcn315 lb bpp to 48
drm/amdgpu: Fix desktop freezed after gpu-reset
drm/rockchip: vop2: Use regcache_sync() to fix suspend/resume
drm/nouveau: fix incorrect conversion to dma_resv_wait_timeout()
drm/rockchip: vop2: fix suspend/resume
drm/i915: Fix fast wake AUX sync len
drm/sched: Check scheduler ready before calling timeout handling
I didn't really want to do this, but as part of all the other changes to
the user copy loops, I've been looking at this horror.
I tried to clean it up multiple times, but every time I just found more
problems, and the way it's written, it's just too hard to fix them.
For example, the code is written to do quad-word alignment, and will use
regular byte accesses to get to that point. That's fairly simple, but
it means that any initial 8-byte alignment will be done with cached
copies.
However, the code then is very careful to do any 4-byte _tail_ accesses
using an uncached 4-byte write, and that was claimed to be relevant in
commit a82eee742452 ("x86/uaccess/64: Handle the caching of 4-byte
nocache copies properly in __copy_user_nocache()").
So if you do a 4-byte copy using that function, it carefully uses a
4-byte 'movnti' for the destination. But if you were to do a 12-byte
copy that is 4-byte aligned, it would _not_ do a 4-byte 'movnti'
followed by a 8-byte 'movnti' to keep it all uncached.
Instead, it would align the destination to 8 bytes using a
byte-at-a-time loop, and then do a 8-byte 'movnti' for the final 8
bytes.
The main caller that cares is __copy_user_flushcache(), which knows
about this insanity, and has odd cases for it all. But I just can't
deal with looking at this kind of "it does one case right, and another
related case entirely wrong".
And the code really wasn't fixable without hard drugs, which I try to
avoid.
So instead, rewrite it in a form that hopefully not only gets this
right, but is a bit more maintainable. Knock wood.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The existing clk documentation has a section that talks about the
clk_ignore_unused kernel parameter. Add additional documentation that
describes how to log which clocks the kernel disables on bootup. This
will log messages like the following to the console on bootup:
[ 1.268115] clk: Disabling unused clocks
[ 1.272167] clk_disable: gcc_usb_clkref_en
[ 1.276389] clk_disable: gcc_usb30_sec_sleep_clk
[ 1.281131] clk_disable: gcc_usb30_prim_sleep_clk
...
Signed-off-by: Brian Masney <bmasney@redhat.com>
Link: https://lore.kernel.org/r/20230411192153.289688-1-bmasney@redhat.com
[jc: turned parameters into a literal block]
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
There is a typo in the sentence "A kernel developer must be
conscience ...". The word conscience should be conscious.
This patch fixes it.
Signed-off-by: Lin Yu Chen <starpt.official@gmail.com>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20230412183739.89894-1-starpt.official@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
The "Select the recipients for your patch" part about CC-ing mailing
lists is a bit vague and might be understood that only some lists should
be Cc-ed. That's not what most of the maintainers expect. For given
code, associated mailing list must always be CC-ed, because the list is
used for reviewing and testing patches. Example are the Devicetree
bindings patches, which are tested iff Devicetree mailing list is CC-ed.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230413165501.47442-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Turns out rules about PT_INTERP, PT_GNU_STACK and PT_GNU_PROPERTY
program headers are slightly different.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Link: https://lore.kernel.org/r/88d3f1bb-f4e0-4c40-9304-3843513a1262@p183
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
ST's STiH415 and STiH416 platforms support have been removed since
a long time already. This commit updates the sti related documentation
overview to remove related entries and update the sti part to add
STiH407/STiH410 and STiH418 platforms which are still actively
supported.
Signed-off-by: Alain Volmat <avolmat@me.com>
Link: https://lore.kernel.org/r/20230416185349.18156-1-avolmat@me.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
We have long disabled the "html_use_smartypants" option to prevent Sphinx
from mangling "--" sequences (among others). Unfortunately, Sphinx changed
that option to "smartquotes" in the 1.6.6 release, and seemingly didn't see
fit to warn about the use of the obsolete option, resulting in the
aforementioned mangling returning. Disable this behavior again and hope
that the option name stays stable for a while.
Reported-by: Zipeng Zhang <zhangzipeng0@foxmail.com>
Link: https://lore.kernel.org/lkml/tencent_CB1A298D31FD221496FF657CD7EF406E6605@qq.com
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Merge tag 'pci-v6.3-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Pull pci fix from Bjorn Helgaas:
- Previously we ignored PCI devices if the DT "status" property or the
ACPI _STA method said it was not present.
Per spec, _STA cannot be used for that purpose, and using it that way
caused regressions, so skip the _STA check (Rob Herring)
* tag 'pci-v6.3-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
PCI: Restrict device disabled status check to DT
Currently, a limit of 0 results in a hard coded metering over 6 hours.
Since the default is a set limit, I suspect no one truly depends on this
rather arbitrary setting. Repurpose it for an arguably more useful
"unlimited" mode, where the delay is 0.
Note that if block groups are too new, or go fully empty, there is still
a delay associated with those conditions. Those delays implement
heuristics for not trimming a region we are relatively likely to fully
overwrite soon.
CC: stable@vger.kernel.org # 6.2+
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Boris Burkov <boris@bur.io>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Previously, the default was a relatively conservative 10. This results
in a 100ms delay, so with ~300 discards in a commit, it takes the full
30s till the next commit to finish the discards. On a workstation, this
results in the disk never going idle, wasting power/battery, etc.
Set the default to 1000, which results in using the smallest possible
delay, currently, which is 1ms. This has shown to not pathologically
keep the disk busy by the original reporter.
Link: https://lore.kernel.org/linux-btrfs/Y%2F+n1wS%2F4XAH7X1p@nz/
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2182228
CC: stable@vger.kernel.org # 6.2+
Reviewed-by: Neal Gompa <neal@gompa.dev
Signed-off-by: Boris Burkov <boris@bur.io>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This partially reverts commit e161d4b60ae3a5356e07202e0bfedb5fad82c6aa.
Turns out the channelmap variable is not actually read-only, it's modified
through the MCI_GPM_CLR_CHANNEL_BIT() macro further down in the function,
so making it read-only causes page faults when that code is hit.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=217183
Link: https://lore.kernel.org/r/20230413214118.153781-1-toke@toke.dk
Fixes: e161d4b60ae3 ("wifi: ath9k: Make arrays prof_prio and channelmap static const")
Cc: stable@vger.kernel.org
Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- Build: Rust + GCC build fix and 'grep' warning fix.
- Code: Missing 'extern "C"' fix.
- Scripts: 'is_rust_module.sh' and 'generate_rust_analyzer.py' fixes.
- A couple trivial fixes.
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Merge tag 'rust-fixes-6.3' of https://github.com/Rust-for-Linux/linux
Pull Rust fixes from Miguel Ojeda:
"Most of these are straightforward.
The last one is more complex, but it only touches Rust + GCC builds
which are for the moment best-effort.
- Code: Missing 'extern "C"' fix.
- Scripts: 'is_rust_module.sh' and 'generate_rust_analyzer.py' fixes.
- A couple trivial fixes
- Build: Rust + GCC build fix and 'grep' warning fix"
* tag 'rust-fixes-6.3' of https://github.com/Rust-for-Linux/linux:
rust: allow to use INIT_STACK_ALL_ZERO
rust: fix regexp in scripts/is_rust_module.sh
rust: build: Fix grep warning
scripts: generate_rust_analyzer: Handle sub-modules with no Makefile
rust: kernel: Mark rust_fmt_argument as extern "C"
rust: sort uml documentation arch support table
rust: str: fix requierments->requirements typo
Commit 6fffbc7ae137 ("PCI: Honor firmware's device disabled status")
checked the firmware device status for both DT and ACPI devices. That
caused a regression in some ACPI systems. The exact reason isn't clear.
It's possibly a firmware bug. For now, at least, refactor the check to
be for DT based systems only.
Note that the original implementation leaked a refcount which is now
correctly handled.
[bhelgaas: Per ACPI r6.5, sec 6.3.7, for devices on an enumerable bus, _STA
must return with bit[0] ("device is present") set]
Link: https://lore.kernel.org/all/m2fs9lgndw.fsf@gmail.com/
Fixes: 6fffbc7ae137 ("PCI: Honor firmware's device disabled status")
Link: https://lore.kernel.org/r/20230419193513.708818-1-robh@kernel.org
Link: https://bugzilla.kernel.org/show_bug.cgi?id=217317
Reported-by: Donald Hunter <donald.hunter@gmail.com>
Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Tested-by: Donald Hunter <donald.hunter@gmail.com>
Tested-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Binbin Zhou <zhoubinbin@loongson.cn>
Cc: Liu Peibao <liupeibao@loongson.cn>
Cc: Huacai Chen <chenhuacai@loongson.cn>
Current release - regressions:
- sched: clear actions pointer in miss cookie init fail
- mptcp: fix accept vs worker race
- bpf: fix bpf_arch_text_poke() with new_addr == NULL on s390
- eth: bnxt_en: fix a possible NULL pointer dereference in unload path
- eth: veth: take into account peer device for NETDEV_XDP_ACT_NDO_XMIT xdp_features flag
Current release - new code bugs:
- eth: revert "net/mlx5: Enable management PF initialization"
Previous releases - regressions:
- netfilter: fix recent physdev match breakage
- bpf: fix incorrect verifier pruning due to missing register precision taints
- eth: virtio_net: fix overflow inside xdp_linearize_page()
- eth: cxgb4: fix use after free bugs caused by circular dependency problem
- eth: mlxsw: pci: fix possible crash during initialization
Previous releases - always broken:
- sched: sch_qfq: prevent slab-out-of-bounds in qfq_activate_agg
- netfilter: validate catch-all set elements
- bridge: don't notify FDB entries with "master dynamic"
- eth: bonding: fix memory leak when changing bond type to ethernet
- eth: i40e: fix accessing vsi->active_filters without holding lock
Misc:
- Mat is back as MPTCP co-maintainer
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Merge tag 'net-6.3-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Paolo Abeni:
"Including fixes from netfilter and bpf.
There are a few fixes for new code bugs, including the Mellanox one
noted in the last networking pull. No known regressions outstanding.
Current release - regressions:
- sched: clear actions pointer in miss cookie init fail
- mptcp: fix accept vs worker race
- bpf: fix bpf_arch_text_poke() with new_addr == NULL on s390
- eth: bnxt_en: fix a possible NULL pointer dereference in unload
path
- eth: veth: take into account peer device for
NETDEV_XDP_ACT_NDO_XMIT xdp_features flag
Current release - new code bugs:
- eth: revert "net/mlx5: Enable management PF initialization"
Previous releases - regressions:
- netfilter: fix recent physdev match breakage
- bpf: fix incorrect verifier pruning due to missing register
precision taints
- eth: virtio_net: fix overflow inside xdp_linearize_page()
- eth: cxgb4: fix use after free bugs caused by circular dependency
problem
- eth: mlxsw: pci: fix possible crash during initialization
Previous releases - always broken:
- sched: sch_qfq: prevent slab-out-of-bounds in qfq_activate_agg
- netfilter: validate catch-all set elements
- bridge: don't notify FDB entries with "master dynamic"
- eth: bonding: fix memory leak when changing bond type to ethernet
- eth: i40e: fix accessing vsi->active_filters without holding lock
Misc:
- Mat is back as MPTCP co-maintainer"
* tag 'net-6.3-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (33 commits)
net: bridge: switchdev: don't notify FDB entries with "master dynamic"
Revert "net/mlx5: Enable management PF initialization"
MAINTAINERS: Resume MPTCP co-maintainer role
mailmap: add entries for Mat Martineau
e1000e: Disable TSO on i219-LM card to increase speed
bnxt_en: fix free-runnig PHC mode
net: dsa: microchip: ksz8795: Correctly handle huge frame configuration
bpf: Fix incorrect verifier pruning due to missing register precision taints
hamradio: drop ISA_DMA_API dependency
mlxsw: pci: Fix possible crash during initialization
mptcp: fix accept vs worker race
mptcp: stops worker on unaccepted sockets at listener close
net: rpl: fix rpl header size calculation
net: vmxnet3: Fix NULL pointer dereference in vmxnet3_rq_rx_complete()
bonding: Fix memory leak when changing bond type to Ethernet
veth: take into account peer device for NETDEV_XDP_ACT_NDO_XMIT xdp_features flag
mlxfw: fix null-ptr-deref in mlxfw_mfa2_tlv_next()
bnxt_en: Fix a possible NULL pointer dereference in unload path
bnxt_en: Do not initialize PTP on older P3/P4 chips
netfilter: nf_tables: tighten netlink attribute requirements for catch-all elements
...
- Add opp and bandwidth support to tegra194 cpufreq driver (Sumit
Gupta).
- Use of_property_present() for testing DT property presence (Rob
Herring).
- Remove MODULE_LICENSE in non-modules (Nick Alcock).
- Add SM7225 to cpufreq-dt-platdev blocklist (Luca Weiss).
- Optimizations and fixes for qcom-cpufreq-hw driver (Krzysztof
Kozlowski, Konrad Dybcio, and Bjorn Andersson).
- DT binding updates for qcom-cpufreq-hw driver (Konrad Dybcio and
Bartosz Golaszewski).
- Updates and fixes for mediatek driver (Jia-Wei Chang and
AngeloGioacchino Del Regno).
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Merge tag 'cpufreq-arm-updates-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm
Pull cpufreq/ARM updates for 6.4 from Viresh Kumar:
"- Add opp and bandwidth support to tegra194 cpufreq driver (Sumit
Gupta).
- Use of_property_present() for testing DT property presence (Rob
Herring).
- Remove MODULE_LICENSE in non-modules (Nick Alcock).
- Add SM7225 to cpufreq-dt-platdev blocklist (Luca Weiss).
- Optimizations and fixes for qcom-cpufreq-hw driver (Krzysztof
Kozlowski, Konrad Dybcio, and Bjorn Andersson).
- DT binding updates for qcom-cpufreq-hw driver (Konrad Dybcio and
Bartosz Golaszewski).
- Updates and fixes for mediatek driver (Jia-Wei Chang and
AngeloGioacchino Del Regno)."
intel_pmc_core displays a warning when the module parameter
`warn_on_s0ix_failures` is set and a suspend didn't get to a HW sleep
state.
Report this to the standard kernel reporting infrastructure so that
userspace software can query after the suspend cycle is done.
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Suggested-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Currently counters are only captured during suspend when the
warn_on_s0ix_failures module parameter is set.
In order to relay this counter information to the kernel reporting
infrastructure adjust it so that the counters are always captured.
warn_on_s0ix_failures will be utilized solely for messaging by
the driver instead.
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
amd_pmc displays a warning when a suspend didn't get to the deepest
state and a dynamic debugging message with the duration if it did.
Rather than logging to dynamic debugging the duration spent in the
deepest state, report this to the standard kernel reporting
infrastructure so that userspace software can query after the
suspend cycle is done.
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Userspace can't easily discover how much of a sleep cycle was spent in a
hardware sleep state without using kernel tracing and vendor specific sysfs
or debugfs files.
To make this information more discoverable, introduce 3 new sysfs files:
1) The time spent in a hw sleep state for last cycle.
2) The time spent in a hw sleep state since the kernel booted
3) The maximum time that the hardware can report for a sleep cycle.
All of these files will be present only if the system supports s2idle.
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* for-next/sysreg:
arm64/sysreg: Convert HFGITR_EL2 to automatic generation
arm64/idreg: Don't disable SME when disabling SVE
arm64/sysreg: Update ID_AA64PFR1_EL1 for DDI0601 2022-12
arm64/sysreg: Convert HFG[RW]TR_EL2 to automatic generation
arm64/sysreg: allow *Enum blocks in SysregFields blocks
* for-next/stacktrace:
arm64: move PAC masks to <asm/pointer_auth.h>
arm64: use XPACLRI to strip PAC
arm64: avoid redundant PAC stripping in __builtin_return_address()
arm64: stacktrace: always inline core stacktrace functions
arm64: stacktrace: move dump functions to end of file
arm64: stacktrace: recover return address for first entry
* for-next/perf: (24 commits)
KVM: arm64: Ensure CPU PMU probes before pKVM host de-privilege
drivers/perf: hisi: add NULL check for name
drivers/perf: hisi: Remove redundant initialized of pmu->name
perf/arm-cmn: Fix port detection for CMN-700
arm64: pmuv3: dynamically map PERF_COUNT_HW_BRANCH_INSTRUCTIONS
perf/arm-cmn: Validate cycles events fully
Revert "ARM: mach-virt: Select PMUv3 driver by default"
drivers/perf: apple_m1: Add Apple M2 support
dt-bindings: arm-pmu: Add PMU compatible strings for Apple M2 cores
perf: arm_cspmu: Fix variable dereference warning
perf/amlogic: Fix config1/config2 parsing issue
drivers/perf: Use devm_platform_get_and_ioremap_resource()
kbuild, drivers/perf: remove MODULE_LICENSE in non-modules
perf: qcom: Use devm_platform_get_and_ioremap_resource()
perf: arm: Use devm_platform_get_and_ioremap_resource()
perf/arm-cmn: Move overlapping wp_combine field
ARM: mach-virt: Select PMUv3 driver by default
ARM: perf: Allow the use of the PMUv3 driver on 32bit ARM
ARM: Make CONFIG_CPU_V7 valid for 32bit ARMv8 implementations
perf: pmuv3: Change GENMASK to GENMASK_ULL
...
Although pKVM supports CPU PMU emulation for non-protected guests since
722625c6f4c5 ("KVM: arm64: Reenable pmu in Protected Mode"), this relies
on the PMU driver probing before the host has de-privileged so that the
'kvm_arm_pmu_available' static key can still be enabled by patching the
hypervisor text.
As it happens, both of these events hang off device_initcall() but the
PMU consistently won the race until 7755cec63ade ("arm64: perf: Move
PMUv3 driver to drivers/perf"). Since then, the host will fail to boot
when pKVM is enabled:
| hw perfevents: enabled with armv8_pmuv3_0 PMU driver, 7 counters available
| kvm [1]: nVHE hyp BUG at: [<ffff8000090366e0>] __kvm_nvhe_handle_host_mem_abort+0x270/0x284!
| kvm [1]: Cannot dump pKVM nVHE stacktrace: !CONFIG_PROTECTED_NVHE_STACKTRACE
| kvm [1]: Hyp Offset: 0xfffea41fbdf70000
| Kernel panic - not syncing: HYP panic:
| PS:a00003c9 PC:0000dbe04b0c66e0 ESR:00000000f2000800
| FAR:fffffbfffddfcf00 HPFAR:00000000010b0bf0 PAR:0000000000000000
| VCPU:0000000000000000
| CPU: 2 PID: 1 Comm: swapper/0 Not tainted 6.3.0-rc7-00083-g0bce6746d154 #1
| Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015
| Call trace:
| dump_backtrace+0xec/0x108
| show_stack+0x18/0x2c
| dump_stack_lvl+0x50/0x68
| dump_stack+0x18/0x24
| panic+0x13c/0x33c
| nvhe_hyp_panic_handler+0x10c/0x190
| aarch64_insn_patch_text_nosync+0x64/0xc8
| arch_jump_label_transform+0x4c/0x5c
| __jump_label_update+0x84/0xfc
| jump_label_update+0x100/0x134
| static_key_enable_cpuslocked+0x68/0xac
| static_key_enable+0x20/0x34
| kvm_host_pmu_init+0x88/0xa4
| armpmu_register+0xf0/0xf4
| arm_pmu_acpi_probe+0x2ec/0x368
| armv8_pmu_driver_init+0x38/0x44
| do_one_initcall+0xcc/0x240
Fix the race properly by deferring the de-privilege step to
device_initcall_sync(). This will also be needed in future when probing
IOMMU devices and allows us to separate the pKVM de-privilege logic from
the core hypervisor initialisation path.
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: Fuad Tabba <tabba@google.com>
Cc: Marc Zyngier <maz@kernel.org>
Fixes: 7755cec63ade ("arm64: perf: Move PMUv3 driver to drivers/perf")
Tested-by: Fuad Tabba <tabba@google.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230420123356.2708-1-will@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
This reverts commit 23f3e3272e7a4d9fb870485cd6df1e4f9539282c.
blk-mq sched bio merge still needs request to grab queue usage counter,
so we can't simply call blk_mq_attempt_bio_merge() when queue usage
counter isn't held.
Fixes: 23f3e3272e7a ("block: Merge bio before checking ->cached_rq")
Cc: Xiao Ni <xni@redhat.com>
Reported-by: Yi Zhang <yi.zhang@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20230420112018.1108058-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
* for-next/misc:
arm64: kexec: include reboot.h
arm64: delete dead code in this_cpu_set_vectors()
arm64: kernel: Fix kernel warning when nokaslr is passed to commandline
arm64: kgdb: Set PSTATE.SS to 1 to re-enable single-step
arm64/sme: Fix some comments of ARM SME
arm64/signal: Alloc tpidr2 sigframe after checking system_supports_tpidr2()
arm64/signal: Use system_supports_tpidr2() to check TPIDR2
arm64: compat: Remove defines now in asm-generic
arm64: kexec: remove unnecessary (void*) conversions
arm64: armv8_deprecated: remove unnecessary (void*) conversions
firmware: arm_sdei: Fix sleep from invalid context BUG
* for-next/kdump:
arm64: kdump: defer the crashkernel reservation for platforms with no DMA memory zones
arm64: kdump: do not map crashkernel region specifically
arm64: kdump : take off the protection on crashkernel memory region
* for-next/ftrace:
arm64: ftrace: Simplify get_ftrace_plt
arm64: ftrace: Add direct call support
ftrace: selftest: remove broken trace_direct_tramp
ftrace: Make DIRECT_CALLS work WITH_ARGS and !WITH_REGS
ftrace: Store direct called addresses in their ops
ftrace: Rename _ftrace_direct_multi APIs to _ftrace_direct APIs
ftrace: Remove the legacy _ftrace_direct API
ftrace: Replace uses of _ftrace_direct APIs with _ftrace_direct_multi
ftrace: Let unregister_ftrace_direct_multi() call ftrace_free_filter()
* for-next/cpufeature:
arm64/cpufeature: Use helper macro to specify ID register for capabilites
arm64/cpufeature: Consistently use symbolic constants for min_field_value
arm64/cpufeature: Pull out helper for CPUID register definitions
* for-next/asm:
arm64: uaccess: remove unnecessary earlyclobber
arm64: uaccess: permit put_{user,kernel} to use zero register
arm64: uaccess: permit __smp_store_release() to use zero register
arm64: atomics: lse: improve cmpxchg implementation
Include reboot.h in machine_kexec.c for declaration of
machine_crash_shutdown.
gcc-12 with W=1 reports:
arch/arm64/kernel/machine_kexec.c:257:6: warning: no previous prototype for 'machine_crash_shutdown' [-Wmissing-prototypes]
257 | void machine_crash_shutdown(struct pt_regs *regs)
No functional changes intended.
Compile tested only.
Signed-off-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20230418-arm64-kexec-include-reboot-v1-1-8453fd4fb3fb@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
The "slot" variable is an enum, and in this context it is an unsigned
int. So the type means it can never be negative and also we never pass
invalid data to this function. If something did pass invalid data then
this check would be insufficient protection.
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/73859c9e-dea0-4764-bf01-7ae694fa2e37@kili.mountain
Signed-off-by: Will Deacon <will@kernel.org>
