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- Disallow virtualizing legacy LBRs if architectural LBRs are available,
the two are mutually exclusive in hardware
- Disallow writes to immutable feature MSRs (notably PERF_CAPABILITIES)
after KVM_RUN, and overhaul the vmx_pmu_caps selftest to better
validate PERF_CAPABILITIES
- Apply PMU filters to emulated events and add test coverage to the
pmu_event_filter selftest
- Misc cleanups and fixes
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Merge tag 'kvm-x86-pmu-6.4' of https://github.com/kvm-x86/linux into HEAD
KVM x86 PMU changes for 6.4:
- Disallow virtualizing legacy LBRs if architectural LBRs are available,
the two are mutually exclusive in hardware
- Disallow writes to immutable feature MSRs (notably PERF_CAPABILITIES)
after KVM_RUN, and overhaul the vmx_pmu_caps selftest to better
validate PERF_CAPABILITIES
- Apply PMU filters to emulated events and add test coverage to the
pmu_event_filter selftest
- Misc cleanups and fixes
- Numerous fixes for the pathological lock inversion issue that
plagued KVM/arm64 since... forever.
- New framework allowing SMCCC-compliant hypercalls to be forwarded
to userspace, hopefully paving the way for some more features
being moved to VMMs rather than be implemented in the kernel.
- Large rework of the timer code to allow a VM-wide offset to be
applied to both virtual and physical counters as well as a
per-timer, per-vcpu offset that complements the global one.
This last part allows the NV timer code to be implemented on
top.
- A small set of fixes to make sure that we don't change anything
affecting the EL1&0 translation regime just after having having
taken an exception to EL2 until we have executed a DSB. This
ensures that speculative walks started in EL1&0 have completed.
- The usual selftest fixes and improvements.
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Merge tag 'kvmarm-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 updates for 6.4
- Numerous fixes for the pathological lock inversion issue that
plagued KVM/arm64 since... forever.
- New framework allowing SMCCC-compliant hypercalls to be forwarded
to userspace, hopefully paving the way for some more features
being moved to VMMs rather than be implemented in the kernel.
- Large rework of the timer code to allow a VM-wide offset to be
applied to both virtual and physical counters as well as a
per-timer, per-vcpu offset that complements the global one.
This last part allows the NV timer code to be implemented on
top.
- A small set of fixes to make sure that we don't change anything
affecting the EL1&0 translation regime just after having having
taken an exception to EL2 until we have executed a DSB. This
ensures that speculative walks started in EL1&0 have completed.
- The usual selftest fixes and improvements.
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Merge tag 'for-6.4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs updates from David Sterba:
"Mostly core changes and cleanups, some notable fixes and two
performance improvements in directory logging.
The IO path cleanups are removing or refactoring old code, scrub main
loop has been completely rewritten also refactoring old code.
There are some changes to non-btrfs code, mostly trivial, the cgroup
punt bio logic is only moved from generic code.
Performance improvements:
- improve logging changes in a directory during one transaction,
avoid iterating over items and reduce lock contention (fsync time
4x lower)
- when logging directory entries during one transaction, reduce
locking of subvolume trees by checking tree-log instead
(improvement in throughput and latency for concurrent access to a
subvolume)
Notable fixes:
- dev-replace:
- properly honor read mode when requested to avoid reading from
source device
- target device won't be used for eventual read repair, this is
unreliable for NODATASUM files
- when there are unpaired (and unrepairable) metadata during
replace, exit early with error and don't try to finish whole
operation
- scrub ioctl properly rejects unknown flags
- fix global block reserve calculations
- fix partial direct io write when there's a page fault in the
middle, iomap will try to continue with partial request but the
btrfs part did not match that, this can lead to zeros written
instead of data
Core changes:
- io path:
- continued cleanups and refactoring around bio handling
- extent io submit path simplifications and cleanups
- flush write path simplifications and cleanups
- rework logic of passing sync mode of bio, with further cleanups
- rewrite scrub code flow, restructure how the stripes are enumerated
and verified in a more unified way
- allow to set lower threshold for block group reclaim in debug mode
to aid zoned mode testing
- remove obsolete time-based delayed ref throttling logic when
truncating items
- DREW locks are not using percpu variables anymore
- more warning fixes (-Wmaybe-uninitialized)
- u64 division simplifications
- error handling improvements
Non-btrfs code changes:
- push cgroup punt bio logic to btrfs code (there was no other user
of that), the functionality can be now selected separately by
BLK_CGROUP_PUNT_BIO
- crc32c_impl removed after removing last uses in btrfs code
- add btrfs_assertfail() to objtool table"
* tag 'for-6.4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (147 commits)
btrfs: mark btrfs_assertfail() __noreturn
btrfs: fix uninitialized variable warnings
btrfs: use log root when iterating over index keys when logging directory
btrfs: avoid iterating over all indexes when logging directory
btrfs: dev-replace: error out if we have unrepaired metadata error during
btrfs: remove pointless loop at btrfs_get_next_valid_item()
btrfs: scrub: reject unsupported scrub flags
btrfs: reinterpret async discard iops_limit=0 as no delay
btrfs: set default discard iops_limit to 1000
btrfs: remove unused raid56 functions which were dedicated for scrub
btrfs: scrub: remove scrub_bio structure
btrfs: scrub: remove scrub_block and scrub_sector structures
btrfs: scrub: remove the old scrub recheck code
btrfs: scrub: remove the old writeback infrastructure
btrfs: scrub: remove scrub_parity structure
btrfs: scrub: use scrub_stripe to implement RAID56 P/Q scrub
btrfs: scrub: switch scrub_simple_mirror() to scrub_stripe infrastructure
btrfs: scrub: introduce helper to queue a stripe for scrub
btrfs: scrub: introduce error reporting functionality for scrub_stripe
btrfs: scrub: introduce a writeback helper for scrub_stripe
...
- Fix the frequency unit in cpufreq_verify_current_freq checks()
(Sanjay Chandrashekara).
- Make mode_state_machine in amd-pstate static (Tom Rix).
- Make the cpufreq core require drivers with target_index() to set
freq_table (Viresh Kumar).
- Fix typo in the ARM_BRCMSTB_AVS_CPUFREQ Kconfig entry (Jingyu Wang).
- Use of_property_read_bool() for boolean properties in the pmac32
cpufreq driver (Rob Herring).
- Make the cpufreq sysfs interface return proper error codes on
obviously invalid input (qinyu).
- Add guided autonomous mode support to the AMD P-state driver (Wyes
Karny).
- Make the Intel P-state driver enable HWP IO boost on all server
platforms (Srinivas Pandruvada).
- 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).
- Use of_property_present() for testing DT property presence in the
cpuidle code (Rob Herring).
- Drop unnecessary (void *) conversions from the PM core (Li zeming).
- Add sysfs files to represent time spent in a platform sleep state
during suspend-to-idle and make AMD and Intel PMC drivers use them
(Mario Limonciello).
- Use of_property_present() for testing DT property presence (Rob
Herring).
- Add set_required_opps() callback to the 'struct opp_table', to make
the code paths cleaner (Viresh Kumar).
- Update the pm-graph siute of utilities to v5.11 with the following
changes:
* New script which allows users to install the latest pm-graph
from the upstream github repo.
* Update all the dmesg suspend/resume PM print formats to be able to
process recent timelines using dmesg only.
* Add ethtool output to the log for the system's ethernet device if
ethtool exists.
* Make the tool more robustly handle events where mangled dmesg or
ftrace outputs do not include all the requisite data.
- Make the sleepgraph utility recognize "CPU killed" messages (Xueqin
Luo).
- Remove unneeded SRCU selection in Kconfig because it's always set
from devfreq core (Paul E. McKenney).
- Drop of_match_ptr() macro from exynos-bus.c because this driver is
always using the DT table for driver probe (Krzysztof Kozlowski).
- Use the preferred of_property_present() instead of the low-level
of_get_property() on exynos-bus.c (Rob Herring).
- Use devm_platform_get_and_ioream_resource() in exyno-ppmu.c (Yang Li).
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Merge tag 'pm-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki:
"These update several cpufreq drivers and the cpufreq core, add sysfs
interface for exposing the time really spent in the platform low-power
state during suspend-to-idle, update devfreq (core and drivers) and
the pm-graph suite of tools and clean up code.
Specifics:
- Fix the frequency unit in cpufreq_verify_current_freq checks()
Sanjay Chandrashekara)
- Make mode_state_machine in amd-pstate static (Tom Rix)
- Make the cpufreq core require drivers with target_index() to set
freq_table (Viresh Kumar)
- Fix typo in the ARM_BRCMSTB_AVS_CPUFREQ Kconfig entry (Jingyu Wang)
- Use of_property_read_bool() for boolean properties in the pmac32
cpufreq driver (Rob Herring)
- Make the cpufreq sysfs interface return proper error codes on
obviously invalid input (qinyu)
- Add guided autonomous mode support to the AMD P-state driver (Wyes
Karny)
- Make the Intel P-state driver enable HWP IO boost on all server
platforms (Srinivas Pandruvada)
- 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)
- Use of_property_present() for testing DT property presence in the
cpuidle code (Rob Herring)
- Drop unnecessary (void *) conversions from the PM core (Li zeming)
- Add sysfs files to represent time spent in a platform sleep state
during suspend-to-idle and make AMD and Intel PMC drivers use them
Mario Limonciello)
- Use of_property_present() for testing DT property presence (Rob
Herring)
- Add set_required_opps() callback to the 'struct opp_table', to make
the code paths cleaner (Viresh Kumar)
- Update the pm-graph siute of utilities to v5.11 with the following
changes:
* New script which allows users to install the latest pm-graph
from the upstream github repo.
* Update all the dmesg suspend/resume PM print formats to be able
to process recent timelines using dmesg only.
* Add ethtool output to the log for the system's ethernet device
if ethtool exists.
* Make the tool more robustly handle events where mangled dmesg
or ftrace outputs do not include all the requisite data.
- Make the sleepgraph utility recognize "CPU killed" messages (Xueqin
Luo)
- Remove unneeded SRCU selection in Kconfig because it's always set
from devfreq core (Paul E. McKenney)
- Drop of_match_ptr() macro from exynos-bus.c because this driver is
always using the DT table for driver probe (Krzysztof Kozlowski)
- Use the preferred of_property_present() instead of the low-level
of_get_property() on exynos-bus.c (Rob Herring)
- Use devm_platform_get_and_ioream_resource() in exyno-ppmu.c (Yang
Li)"
* tag 'pm-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (44 commits)
platform/x86/intel/pmc: core: Report duration of time in HW sleep state
platform/x86/intel/pmc: core: Always capture counters on suspend
platform/x86/amd: pmc: Report duration of time in hw sleep state
PM: Add sysfs files to represent time spent in hardware sleep state
cpufreq: use correct unit when verify cur freq
cpufreq: tegra194: add OPP support and set bandwidth
cpufreq: amd-pstate: Make varaiable mode_state_machine static
PM: core: Remove unnecessary (void *) conversions
cpufreq: drivers with target_index() must set freq_table
PM / devfreq: exynos-ppmu: Use devm_platform_get_and_ioremap_resource()
OPP: Move required opps configuration to specialized callback
OPP: Handle all genpd cases together in _set_required_opps()
cpufreq: qcom-cpufreq-hw: Revert adding cpufreq qos
dt-bindings: cpufreq: cpufreq-qcom-hw: Add QCM2290
dt-bindings: cpufreq: cpufreq-qcom-hw: Sanitize data per compatible
dt-bindings: cpufreq: cpufreq-qcom-hw: Allow just 1 frequency domain
cpufreq: Add SM7225 to cpufreq-dt-platdev blocklist
cpufreq: qcom-cpufreq-hw: fix double IO unmap and resource release on exit
cpufreq: mediatek: Raise proc and sram max voltage for MT7622/7623
cpufreq: mediatek: raise proc/sram max voltage for MT8516
...
- Update the ACPICA code in the kernel to upstream revision 20230331
including the following changes:
* Delete bogus node_array array of pointers from AEST table (Jessica
Clarke).
* Add support for trace buffer extension in GICC to the ACPI MADT
parser (Xiongfeng Wang).
* Add missing macro ACPI_FUNCTION_TRACE() for acpi_ns_repair_HID()
(Xiongfeng Wang).
* Add missing tables to astable (Pedro Falcato).
* Add support for 64 bit loong_arch compilation to ACPICA (Huacai
Chen).
* Add support for ASPT table in disassembler to ACPICA (Jeremi
Piotrowski).
* Add support for Arm's MPAM ACPI table version 2 (Hesham Almatary).
* Update all copyrights/signons in ACPICA to 2023 (Bob Moore).
* Add support for ClockInput resource (v6.5) (Niyas Sait).
* Add RISC-V INTC interrupt controller definition to the list of
supported interrupt controllers for MADT (Sunil V L).
* Add structure definitions for the RISC-V RHCT ACPI table (Sunil V L).
* Address several cases in which the ACPICA code might lead to
undefined behavior (Tamir Duberstein).
* Make ACPICA code support flexible arrays properly (Kees Cook).
* Check null return of ACPI_ALLOCATE_ZEROED in
acpi_db_display_objects() (void0red).
* Add os specific support for Zephyr RTOS to ACPICA (Najumon).
* Update version to 20230331 (Bob Moore).
- Fix evaluating the _PDC ACPI control method when running as Xen
dom0 (Roger Pau Monne).
- Use platform devices to load ACPI PPC and PCC drivers (Petr Pavlu).
- Check for null return of devm_kzalloc() in fch_misc_setup() (Kang
Chen).
- Log a message if enable_irq_wake() fails for the ACPI SCI (Simon
Gaiser).
- Initialize the correct IOMMU fwspec while parsing ACPI VIOT
(Jean-Philippe Brucker).
- Amend indentation and prefix error messages with FW_BUG in the ACPI
SPCR parsing code (Andy Shevchenko).
- Enable ACPI sysfs support for CCEL records (Kuppuswamy
Sathyanarayanan).
- Make the APEI error injection code warn on invalid arguments when
explicitly indicated by platform (Shuai Xue).
- Add CXL error types to the error injection code in APEI (Tony Luck).
- Refactor acpi_data_prop_read_single() (Andy Shevchenko).
- Fix two issues in the ACPI SBS driver (Armin Wolf).
- Replace ternary operator with min_t() in the generic ACPI thermal
zone driver (Jiangshan Yi).
- Ensure that ACPI notify handlers are not running after removal and
clean up code in acpi_sb_notify() (Rafael Wysocki).
- Remove register_backlight_delay module option and code and remove
quirks for false-positive backlight control support advertised on
desktop boards (Hans de Goede).
- Replace irqdomain.h include with struct declarations in ACPI headers
and update several pieces of code previously including of.h
implicitly through those headers (Rob Herring).
- Fix acpi_evaluate_dsm_typed() redefinition error (Kiran K).
- Update the pm_profile sysfs attribute documentation (Rafael Wysocki).
- Add 80862289 ACPI _HID for second PWM controller on Cherry Trail to
the ACPI driver for Intel SoCs (Hans de Goede).
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Merge tag 'acpi-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI updates from Rafael Wysocki:
"These update the ACPICA code in the kernel to upstream revision
20230331, fix the ACPI SBS driver and the evaluation of the _PDC
method on Xen dom0 in the ACPI processor driver, update the ACPI
driver for Intel SoCs and clean up code in multiple places.
Specifics:
- Update the ACPICA code in the kernel to upstream revision 20230331
including the following changes:
* Delete bogus node_array array of pointers from AEST table
(Jessica Clarke)
* Add support for trace buffer extension in GICC to the ACPI MADT
parser (Xiongfeng Wang)
* Add missing macro ACPI_FUNCTION_TRACE() for
acpi_ns_repair_HID() (Xiongfeng Wang)
* Add missing tables to astable (Pedro Falcato)
* Add support for 64 bit loong_arch compilation to ACPICA (Huacai
Chen)
* Add support for ASPT table in disassembler to ACPICA (Jeremi
Piotrowski)
* Add support for Arm's MPAM ACPI table version 2 (Hesham
Almatary)
* Update all copyrights/signons in ACPICA to 2023 (Bob Moore)
* Add support for ClockInput resource (v6.5) (Niyas Sait)
* Add RISC-V INTC interrupt controller definition to the list of
supported interrupt controllers for MADT (Sunil V L)
* Add structure definitions for the RISC-V RHCT ACPI table (Sunil
V L)
* Address several cases in which the ACPICA code might lead to
undefined behavior (Tamir Duberstein)
* Make ACPICA code support flexible arrays properly (Kees Cook)
* Check null return of ACPI_ALLOCATE_ZEROED in
acpi_db_display_objects() (void0red)
* Add os specific support for Zephyr RTOS to ACPICA (Najumon)
* Update version to 20230331 (Bob Moore)
- Fix evaluating the _PDC ACPI control method when running as Xen
dom0 (Roger Pau Monne)
- Use platform devices to load ACPI PPC and PCC drivers (Petr Pavlu)
- Check for null return of devm_kzalloc() in fch_misc_setup() (Kang
Chen)
- Log a message if enable_irq_wake() fails for the ACPI SCI (Simon
Gaiser)
- Initialize the correct IOMMU fwspec while parsing ACPI VIOT
(Jean-Philippe Brucker)
- Amend indentation and prefix error messages with FW_BUG in the ACPI
SPCR parsing code (Andy Shevchenko)
- Enable ACPI sysfs support for CCEL records (Kuppuswamy
Sathyanarayanan)
- Make the APEI error injection code warn on invalid arguments when
explicitly indicated by platform (Shuai Xue)
- Add CXL error types to the error injection code in APEI (Tony Luck)
- Refactor acpi_data_prop_read_single() (Andy Shevchenko)
- Fix two issues in the ACPI SBS driver (Armin Wolf)
- Replace ternary operator with min_t() in the generic ACPI thermal
zone driver (Jiangshan Yi)
- Ensure that ACPI notify handlers are not running after removal and
clean up code in acpi_sb_notify() (Rafael Wysocki)
- Remove register_backlight_delay module option and code and remove
quirks for false-positive backlight control support advertised on
desktop boards (Hans de Goede)
- Replace irqdomain.h include with struct declarations in ACPI
headers and update several pieces of code previously including of.h
implicitly through those headers (Rob Herring)
- Fix acpi_evaluate_dsm_typed() redefinition error (Kiran K)
- Update the pm_profile sysfs attribute documentation (Rafael
Wysocki)
- Add 80862289 ACPI _HID for second PWM controller on Cherry Trail to
the ACPI driver for Intel SoCs (Hans de Goede)"
* tag 'acpi-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (64 commits)
ACPI: LPSS: Add 80862289 ACPI _HID for second PWM controller on Cherry Trail
ACPI: bus: Ensure that notify handlers are not running after removal
ACPI: bus: Add missing braces to acpi_sb_notify()
ACPI: video: Remove desktops without backlight DMI quirks
ACPI: video: Remove register_backlight_delay module option and code
ACPI: Replace irqdomain.h include with struct declarations
fpga: lattice-sysconfig-spi: Add explicit include for of.h
tpm: atmel: Add explicit include for of.h
virtio-mmio: Add explicit include for of.h
pata: ixp4xx: Add explicit include for of.h
ata: pata_macio: Add explicit include of irqdomain.h
serial: 8250_tegra: Add explicit include for of.h
net: rfkill-gpio: Add explicit include for of.h
staging: iio: resolver: ad2s1210: Add explicit include for of.h
iio: adc: ad7292: Add explicit include for of.h
ACPICA: Update version to 20230331
ACPICA: add os specific support for Zephyr RTOS
ACPICA: ACPICA: check null return of ACPI_ALLOCATE_ZEROED in acpi_db_display_objects
ACPICA: acpi_resource_irq: Replace 1-element arrays with flexible array
ACPICA: acpi_madt_oem_data: Fix flexible array member definition
...
User processes register an address and bit pair for events. If the same
address and bit pair are registered multiple times in the same process,
it can cause undefined behavior when events are enabled/disabled.
When more than one are used, the bit could be turned off by another
event being disabled, while the original event is still enabled.
Prevent undefined behavior by checking the current mm to see if any
event has already been registered for the address and bit pair. Return
EADDRINUSE back to the user process if it's already being used.
Update ftrace self-test to ensure this occurs properly.
Link: https://lkml.kernel.org/r/20230425225107.8525-4-beaub@linux.microsoft.com
Suggested-by: Doug Cook <dcook@linux.microsoft.com>
Signed-off-by: Beau Belgrave <beaub@linux.microsoft.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
If an event is enabled and a user process unregisters user_events, the
bit is left set. Fix this by always clearing the bit in the user process
if unregister is successful.
Update abi self-test to ensure this occurs properly.
Link: https://lkml.kernel.org/r/20230425225107.8525-3-beaub@linux.microsoft.com
Suggested-by: Doug Cook <dcook@linux.microsoft.com>
Signed-off-by: Beau Belgrave <beaub@linux.microsoft.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
The write index indicates which event the data is for and accesses a
per-file array. The index is passed by user processes during write()
calls as the first 4 bytes. Ensure that it cannot be negative by
returning -EINVAL to prevent out of bounds accesses.
Update ftrace self-test to ensure this occurs properly.
Link: https://lkml.kernel.org/r/20230425225107.8525-2-beaub@linux.microsoft.com
Fixes: 7f5a08c79df3 ("user_events: Add minimal support for trace_event into ftrace")
Reported-by: Doug Cook <dcook@linux.microsoft.com>
Signed-off-by: Beau Belgrave <beaub@linux.microsoft.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Highlights:
- AMD PMC and PMF drivers:
- Numerous bugfixes
- Intel Speed Select Technology (ISST):
- TPMI (Topology Aware Register and PM Capsule Interface) support
for ISST support on upcoming processor models
- Various other improvements / new hw support
- tools/intel-speed-select: TPMI support + other improvements
- Intel In Field Scan (IFS):
- Add Array Bist test support
- New drivers:
- intel_bytcrc_pwrsrc Crystal Cove PMIC pwrsrc / reset-reason driver
- lenovo-ymc Yoga Mode Control driver for reporting SW_TABLET_MODE
- msi-ec Driver for MSI laptop EC features like battery charging limits
- apple-gmux:
- Support for new MMIO based models (T2 Macs)
- Honor acpi_backlight= auto-detect-code + kernel cmdline option
to switch between gmux and apple_bl backlight drivers and remove
own custom handling for this
- x86-android-tablets: Refactor / cleanup + new hw support
- Miscellaneous other cleanups / fixes
The following is an automated git shortlog grouped by driver:
Add driver for Yoga Tablet Mode switch:
- Add driver for Yoga Tablet Mode switch
Add intel_bytcrc_pwrsrc driver:
- Add intel_bytcrc_pwrsrc driver
Add new msi-ec driver:
- Add new msi-ec driver
Documentation/ABI:
- Update IFS ABI doc
ISST:
- unlock on error path in tpmi_sst_init()
- Add suspend/resume callbacks
- Add SST-TF support via TPMI
- Add SST-BF support via TPMI
- Add SST-PP support via TPMI
- Add SST-CP support via TPMI
- Parse SST MMIO and update instance
- Enumerate TPMI SST and create framework
- Add support for MSR 0x54
- Add API version of the target
- Add IOCTL default callback
- Add TPMI target
Merge remote-tracking branch 'intel-speed-select/intel-sst' into review-hans:
- Merge remote-tracking branch 'intel-speed-select/intel-sst' into review-hans
Merge tag 'ib-pdx86-backlight-6.4' into review-hans:
- Merge tag 'ib-pdx86-backlight-6.4' into review-hans
Move ideapad ACPI helpers to a new header:
- Move ideapad ACPI helpers to a new header
acer-wmi:
- Convert to platform remove callback returning void
acerhdf:
- Remove unneeded semicolon
adv_swbutton:
- Convert to platform remove callback returning void
amilo-rfkill:
- Convert to platform remove callback returning void
apple-gmux:
- Fix iomem_base __iomem annotation
- return -EFAULT if copy fails
- Update apple_gmux_detect documentation
- Add acpi_video_get_backlight_type() check
- add debugfs interface
- support MMIO gmux on T2 Macs
- refactor gmux types
- use first bit to check switch state
backlight:
- apple_bl: Use acpi_video_get_backlight_type()
barco-p50-gpio:
- Convert to platform remove callback returning void
classmate:
- mark SPI related data as maybe unused
compal-laptop:
- Convert to platform remove callback returning void
dell:
- dell-smo8800: Convert to platform remove callback returning void
- dcdbas: Convert to platform remove callback returning void
dell-laptop:
- Register ctl-led for speaker-mute
hp:
- tc1100-wmi: Convert to platform remove callback returning void
- hp_accel: Convert to platform remove callback returning void
huawei-wmi:
- Convert to platform remove callback returning void
ideapad-laptop:
- Convert to platform remove callback returning void
intel:
- vbtn: Convert to platform remove callback returning void
- telemetry: pltdrv: Convert to platform remove callback returning void
- pmc: core: Convert to platform remove callback returning void
- mrfld_pwrbtn: Convert to platform remove callback returning void
- int3472: discrete: Convert to platform remove callback returning void
- int1092: intel_sar: Convert to platform remove callback returning void
- int0002_vgpio: Convert to platform remove callback returning void
- hid: Convert to platform remove callback returning void
- chtwc_int33fe: Convert to platform remove callback returning void
- chtdc_ti_pwrbtn: Convert to platform remove callback returning void
- bxtwc_tmu: Convert to platform remove callback returning void
intel-uncore-freq:
- Add client processors
mlxbf-bootctl:
- Add sysfs file for BlueField boot fifo
pcengines-apuv2:
- Drop platform:pcengines-apuv2 module-alias
platform/mellanox:
- add firmware reset support
platform/olpc:
- olpc-xo175-ec: Use SPI device ID data to bind device
platform/surface:
- aggregator_registry: Add support for tablet-mode switch on Surface Pro 9
- aggregator_tabletsw: Add support for Type-Cover posture source
- aggregator_tabletsw: Properly handle different posture source IDs
platform/x86/amd:
- pmc: provide user message where s0ix is not supported
- pmc: Remove __maybe_unused from amd_pmc_suspend_handler()
- pmc: Convert to platform remove callback returning void
- pmc: Fix memory leak in amd_pmc_stb_debugfs_open_v2()
- pmc: Move out of BIOS SMN pair for STB init
- pmc: Utilize SMN index 0 for driver probe
- pmc: Move idlemask check into `amd_pmc_idlemask_read`
- pmc: Don't dump data after resume from s0i3 on picasso
- pmc: Hide SMU version and program attributes for Picasso
- pmc: Don't try to read SMU version on Picasso
- pmf: core: Convert to platform remove callback returning void
- hsmp: Convert to platform remove callback returning void
platform/x86/amd/pmf:
- Move out of BIOS SMN pair for driver probe
platform/x86/intel:
- vsec: Use intel_vsec_dev_release() to simplify init() error cleanup
- vsec: Explicitly enable capabilities
platform/x86/intel/ifs:
- Update IFS doc
- Implement Array BIST test
- Sysfs interface for Array BIST
- Introduce Array Scan test to IFS
- IFS cleanup
- Reorganize driver data
- Separate ifs_pkg_auth from ifs_data
platform/x86/intel/pmc/mtl:
- Put GNA/IPU/VPU devices in D3
platform/x86/intel/pmt:
- Ignore uninitialized entries
- Add INTEL_PMT module namespace
platform/x86/intel/sdsi:
- Change mailbox timeout
samsung-q10:
- Convert to platform remove callback returning void
serial-multi-instantiate:
- Convert to platform remove callback returning void
sony:
- mark SPI related data as maybe unused
think-lmi:
- Remove unnecessary casts for attributes
- Remove custom kobject sysfs_ops
- Properly interpret return value of tlmi_setting
thinkpad_acpi:
- Fix Embedded Controller access on X380 Yoga
tools/power/x86/intel-speed-select:
- Update version
- Change TRL display for Emerald Rapids
- Identify Emerald Rapids
- Display AMX base frequency
- Use cgroup v2 isolation
- Add missing free cpuset
- Fix clos-max display with TPMI I/F
- Add cpu id check
- Avoid setting duplicate tdp level
- Remove cpu mask display for non-cpu power domain
- Hide invalid TRL level
- Display fact info for non-cpu power domain
- Show level 0 name for new api_version
- Prevent cpu clos config for non-cpu power domain
- Allow display non-cpu power domain info
- Display amx_p1 and cooling_type
- Display punit info
- Introduce TPMI interface support
- Get punit core mapping information
- Introduce api_version helper
- Support large clos_min/max
- Introduce is_debug_enabled()
- Allow api_version based platform callbacks
- Move send_mbox_cmd to isst-core-mbox.c
- Abstract adjust_uncore_freq
- Abstract read_pm_config
- Abstract clos_associate
- Abstract clos_get_assoc_status
- Abstract set_clos
- Abstract pm_get_clos
- Abstract pm_qos_config
- Abstract get_clos_information
- Abstract get_get_trls
- Enhance get_tdp_info
- Abstract get_uncore_p0_p1_info
- Abstract get_fact_info
- Abstract set_pbf_fact_status
- Remove isst_get_pbf_info_complete
- Abstract get_pbf_info
- Abstract set_tdp_level
- Abstract get_trl_bucket_info
- Abstract get_get_trl
- Abstract get_coremask_info
- Abstract get_tjmax_info
- Move code right before its caller
- Abstract get_pwr_info
- Abstract get_tdp_info
- Abstract get_ctdp_control
- Abstract get_config_levels
- Abstract is_punit_valid
- Introduce isst-core-mbox.c
- Always invoke isst_fill_platform_info
- Introduce isst_get_disp_freq_multiplier
- Move mbox functions to isst-core.c
- Improve isst_print_extended_platform_info
- Rename for_each_online_package_in_set
- Introduce support for multi-punit
- Introduce isst_is_punit_valid()
- Introduce punit to isst_id
- Follow TRL nameing for FACT info
- Unify TRL levels
wmi:
- Convert to platform remove callback returning void
x86-android-tablets:
- Add accelerometer support for Yoga Tablet 2 1050/830 series
- Add "yogabook-touch-kbd-digitizer-switch" pdev for Lenovo Yoga Book
- Add Wacom digitizer info for Lenovo Yoga Book
- Update Yoga Book HiDeep touchscreen comment
- Add Lenovo Yoga Book X90F/L data
- Share lp855x_platform_data between different models
- Use LP8557 in direct mode on both the Yoga 830 and the 1050
- Add depends on PMIC_OPREGION
- Lenovo Yoga Book match is for YB1-X91 models only
- Add LID switch support for Yoga Tablet 2 1050/830 series
- Add backlight ctrl for Lenovo Yoga Tab 3 Pro YT3-X90F
- Add touchscreen support for Lenovo Yoga Tab 3 Pro YT3-X90F
- Add support for the Dolby button on Peaq C1010
- Add gpio_keys support to x86_android_tablet_init()
- Move remaining tablets to other.c
- Move Lenovo tablets to their own file
- Move Asus tablets to their own file
- Move shared power-supply fw-nodes to a separate file
- Move DMI match table into its own dmi.c file
- Move core code into new core.c file
- Move into its own subdir
- Add Acer Iconia One 7 B1-750 data
x86/include/asm/msr-index.h:
- Add IFS Array test bits
xo1-rfkill:
- Convert to platform remove callback returning void
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Merge tag 'platform-drivers-x86-v6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86
Pull x86 platform driver updates from Hans de Goede:
- AMD PMC and PMF drivers:
- Numerous bugfixes
- Intel Speed Select Technology (ISST):
- TPMI (Topology Aware Register and PM Capsule Interface) support
for ISST support on upcoming processor models
- Various other improvements / new hw support
- tools/intel-speed-select: TPMI support + other improvements
- Intel In Field Scan (IFS):
- Add Array Bist test support
- New drivers:
- intel_bytcrc_pwrsrc Crystal Cove PMIC pwrsrc / reset-reason driver
- lenovo-ymc Yoga Mode Control driver for reporting SW_TABLET_MODE
- msi-ec Driver for MSI laptop EC features like battery charging limits
- apple-gmux:
- Support for new MMIO based models (T2 Macs)
- Honor acpi_backlight= auto-detect-code + kernel cmdline option
to switch between gmux and apple_bl backlight drivers and remove
own custom handling for this
- x86-android-tablets: Refactor / cleanup + new hw support
- Miscellaneous other cleanups / fixes
* tag 'platform-drivers-x86-v6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (178 commits)
platform/x86: x86-android-tablets: Add accelerometer support for Yoga Tablet 2 1050/830 series
platform/x86: x86-android-tablets: Add "yogabook-touch-kbd-digitizer-switch" pdev for Lenovo Yoga Book
platform/x86: x86-android-tablets: Add Wacom digitizer info for Lenovo Yoga Book
platform/x86: x86-android-tablets: Update Yoga Book HiDeep touchscreen comment
platform/x86: thinkpad_acpi: Fix Embedded Controller access on X380 Yoga
platform/x86/intel/sdsi: Change mailbox timeout
platform/x86/intel/pmt: Ignore uninitialized entries
platform/x86: amd: pmc: provide user message where s0ix is not supported
platform/x86/amd: pmc: Fix memory leak in amd_pmc_stb_debugfs_open_v2()
mlxbf-bootctl: Add sysfs file for BlueField boot fifo
platform/x86: amd: pmc: Remove __maybe_unused from amd_pmc_suspend_handler()
platform/x86/intel/pmc/mtl: Put GNA/IPU/VPU devices in D3
platform/x86/amd: pmc: Move out of BIOS SMN pair for STB init
platform/x86/amd: pmc: Utilize SMN index 0 for driver probe
platform/x86/amd: pmc: Move idlemask check into `amd_pmc_idlemask_read`
platform/x86/amd: pmc: Don't dump data after resume from s0i3 on picasso
platform/x86/amd: pmc: Hide SMU version and program attributes for Picasso
platform/x86/amd: pmc: Don't try to read SMU version on Picasso
platform/x86/amd/pmf: Move out of BIOS SMN pair for driver probe
platform/x86: intel-uncore-freq: Add client processors
...
The "Previous IRQ interference" line is misaligned and without
a \n, breaking the tool's output:
## CPU 12 hit stop tracing, analyzing it ##
Previous IRQ interference: up to 2.22 us IRQ handler delay: 18.06 us (0.00 %)
IRQ latency: 18.52 us
Timerlat IRQ duration: 4.41 us (0.00 %)
Blocking thread: 216.93 us (0.03 %)
Fix the output:
## CPU 7 hit stop tracing, analyzing it ##
Previous IRQ interference: up to 8.93 us
IRQ handler delay: 0.98 us (0.00 %)
IRQ latency: 2.95 us
Timerlat IRQ duration: 11.26 us (0.03 %)
Link: https://lore.kernel.org/linux-trace-devel/8b5819077f15ccf24745c9bf3205451e16ee32d9.1679685525.git.bristot@kernel.org
Fixes: 27e348b221f6 ("rtla/timerlat: Add auto-analysis core")
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Parsing and formating timerlat data might consume a reasonable
amount of CPU time on very large systems, or when timerlat
has a too short period.
Add an option to run timerlat with auto-analysis enabled while
skipping the statistics parsing. In this mode, rtla timerlat
periodically checks if the tracing is on, going to sleep waiting
for the stop tracing condition to stop tracing, or for the
tracing session to finish.
If the stop tracing condition is hit, the tool prints the auto
analysis. Otherwise, the tool prints the max observed latency and
exit. The max observed latency is captured via tracing_max_latency.
Link: https://lore.kernel.org/linux-trace-devel/4dc514d1d5dc353c537a466a9b5af44c266b6da2.1680106912.git.bristot@kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
The variable run is not initialized however it is being accumulated
by the return value from the call to ikm_run_monitor. Fix this by
initializing run to zero at the start of the function.
Link: https://lkml.kernel.org/r/20230424094730.105313-1-colin.i.king@gmail.com
Fixes: 4bc4b131d44c ("rv: Add rv tool")
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Acked-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
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Merge tag 'slab-for-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab
Pull slab updates from Vlastimil Babka:
"The main change is naturally the SLOB removal. Since its deprecation
in 6.2 I've seen no complaints so hopefully SLUB_(TINY) works well for
everyone and we can proceed.
Besides the code cleanup, the main immediate benefit will be allowing
kfree() family of function to work on kmem_cache_alloc() objects,
which was incompatible with SLOB. This includes kfree_rcu() which had
no kmem_cache_free_rcu() counterpart yet and now it shouldn't be
necessary anymore.
Besides that, there are several small code and comment improvements
from Thomas, Thorsten and Vernon"
* tag 'slab-for-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
mm/slab: document kfree() as allowed for kmem_cache_alloc() objects
mm/slob: remove slob.c
mm/slab: remove CONFIG_SLOB code from slab common code
mm, pagemap: remove SLOB and SLQB from comments and documentation
mm, page_flags: remove PG_slob_free
mm/slob: remove CONFIG_SLOB
mm/slub: fix help comment of SLUB_DEBUG
mm: slub: make kobj_type structure constant
slab: Adjust comment after refactoring of gfp.h
These are various cleanups, fixing a number of uapi header files to no
longer reference CONFIG_* symbols, and one patch that introduces the
new CONFIG_HAS_IOPORT symbol for architectures that provide working
inb()/outb() macros, as a preparation for adding driver dependencies
on those in the following release.
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Merge tag 'asm-generic-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
Pull asm-generic updates from Arnd Bergmann:
"These are various cleanups, fixing a number of uapi header files to no
longer reference CONFIG_* symbols, and one patch that introduces the
new CONFIG_HAS_IOPORT symbol for architectures that provide working
inb()/outb() macros, as a preparation for adding driver dependencies
on those in the following release"
* tag 'asm-generic-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
Kconfig: introduce HAS_IOPORT option and select it as necessary
scripts: Update the CONFIG_* ignore list in headers_install.sh
pktcdvd: Remove CONFIG_CDROM_PKTCDVD_WCACHE from uapi header
Move bp_type_idx to include/linux/hw_breakpoint.h
Move ep_take_care_of_epollwakeup() to fs/eventpoll.c
Move COMPAT_ATM_ADDPARTY to net/atm/svc.c
- Improve the VDSO build time checks to cover all dynamic relocations
VDSO does not allow dynamic relcations, but the build time check is
incomplete and fragile.
It's based on architectures specifying the relocation types to search
for and does not handle R_*_NONE relocation entries correctly.
R_*_NONE relocations are injected by some GNU ld variants if they fail
to determine the exact .rel[a]/dyn_size to cover trailing zeros.
R_*_NONE relocations must be ignored by dynamic loaders, so they
should be ignored in the build time check too.
Remove the architecture specific relocation types to check for and
validate strictly that no other relocations than R_*_NONE end up
in the VSDO .so file.
- Prefer signal delivery to the current thread for
CLOCK_PROCESS_CPUTIME_ID based posix-timers
Such timers prefer to deliver the signal to the main thread of a
process even if the context in which the timer expires is the current
task. This has the downside that it might wake up an idle thread.
As there is no requirement or guarantee that the signal has to be
delivered to the main thread, avoid this by preferring the current
task if it is part of the thread group which shares sighand.
This not only avoids waking idle threads, it also distributes the
signal delivery in case of multiple timers firing in the context
of different threads close to each other better.
- Align the tick period properly (again)
For a long time the tick was starting at CLOCK_MONOTONIC zero, which
allowed users space applications to either align with the tick or to
place a periodic computation so that it does not interfere with the
tick. The alignement of the tick period was more by chance than by
intention as the tick is set up before a high resolution clocksource is
installed, i.e. timekeeping is still tick based and the tick period
advances from there.
The early enablement of sched_clock() broke this alignement as the time
accumulated by sched_clock() is taken into account when timekeeping is
initialized. So the base value now(CLOCK_MONOTONIC) is not longer a
multiple of tick periods, which breaks applications which relied on
that behaviour.
Cure this by aligning the tick starting point to the next multiple of
tick periods, i.e 1000ms/CONFIG_HZ.
- A set of NOHZ fixes and enhancements
- Cure the concurrent writer race for idle and IO sleeptime statistics
The statitic values which are exposed via /proc/stat are updated from
the CPU local idle exit and remotely by cpufreq, but that happens
without any form of serialization. As a consequence sleeptimes can be
accounted twice or worse.
Prevent this by restricting the accumulation writeback to the CPU
local idle exit and let the remote access compute the accumulated
value.
- Protect idle/iowait sleep time with a sequence count
Reading idle/iowait sleep time, e.g. from /proc/stat, can race with
idle exit updates. As a consequence the readout may result in random
and potentially going backwards values.
Protect this by a sequence count, which fixes the idle time
statistics issue, but cannot fix the iowait time problem because
iowait time accounting races with remote wake ups decrementing the
remote runqueues nr_iowait counter. The latter is impossible to fix,
so the only way to deal with that is to document it properly and to
remove the assertion in the selftest which triggers occasionally due
to that.
- Restructure struct tick_sched for better cache layout
- Some small cleanups and a better cache layout for struct tick_sched
- Implement the missing timer_wait_running() callback for POSIX CPU timers
For unknown reason the introduction of the timer_wait_running() callback
missed to fixup posix CPU timers, which went unnoticed for almost four
years.
While initially only targeted to prevent livelocks between a timer
deletion and the timer expiry function on PREEMPT_RT enabled kernels, it
turned out that fixing this for mainline is not as trivial as just
implementing a stub similar to the hrtimer/timer callbacks.
The reason is that for CONFIG_POSIX_CPU_TIMERS_TASK_WORK enabled systems
there is a livelock issue independent of RT.
CONFIG_POSIX_CPU_TIMERS_TASK_WORK=y moves the expiry of POSIX CPU timers
out from hard interrupt context to task work, which is handled before
returning to user space or to a VM. The expiry mechanism moves the
expired timers to a stack local list head with sighand lock held. Once
sighand is dropped the task can be preempted and a task which wants to
delete a timer will spin-wait until the expiry task is scheduled back
in. In the worst case this will end up in a livelock when the preempting
task and the expiry task are pinned on the same CPU.
The timer wheel has a timer_wait_running() mechanism for RT, which uses
a per CPU timer-base expiry lock which is held by the expiry code and the
task waiting for the timer function to complete blocks on that lock.
This does not work in the same way for posix CPU timers as there is no
timer base and expiry for process wide timers can run on any task
belonging to that process, but the concept of waiting on an expiry lock
can be used too in a slightly different way.
Add a per task mutex to struct posix_cputimers_work, let the expiry task
hold it accross the expiry function and let the deleting task which
waits for the expiry to complete block on the mutex.
In the non-contended case this results in an extra mutex_lock()/unlock()
pair on both sides.
This avoids spin-waiting on a task which is scheduled out, prevents the
livelock and cures the problem for RT and !RT systems.
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Merge tag 'timers-core-2023-04-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timers and timekeeping updates from Thomas Gleixner:
- Improve the VDSO build time checks to cover all dynamic relocations
VDSO does not allow dynamic relocations, but the build time check is
incomplete and fragile.
It's based on architectures specifying the relocation types to search
for and does not handle R_*_NONE relocation entries correctly.
R_*_NONE relocations are injected by some GNU ld variants if they
fail to determine the exact .rel[a]/dyn_size to cover trailing zeros.
R_*_NONE relocations must be ignored by dynamic loaders, so they
should be ignored in the build time check too.
Remove the architecture specific relocation types to check for and
validate strictly that no other relocations than R_*_NONE end up in
the VSDO .so file.
- Prefer signal delivery to the current thread for
CLOCK_PROCESS_CPUTIME_ID based posix-timers
Such timers prefer to deliver the signal to the main thread of a
process even if the context in which the timer expires is the current
task. This has the downside that it might wake up an idle thread.
As there is no requirement or guarantee that the signal has to be
delivered to the main thread, avoid this by preferring the current
task if it is part of the thread group which shares sighand.
This not only avoids waking idle threads, it also distributes the
signal delivery in case of multiple timers firing in the context of
different threads close to each other better.
- Align the tick period properly (again)
For a long time the tick was starting at CLOCK_MONOTONIC zero, which
allowed users space applications to either align with the tick or to
place a periodic computation so that it does not interfere with the
tick. The alignement of the tick period was more by chance than by
intention as the tick is set up before a high resolution clocksource
is installed, i.e. timekeeping is still tick based and the tick
period advances from there.
The early enablement of sched_clock() broke this alignement as the
time accumulated by sched_clock() is taken into account when
timekeeping is initialized. So the base value now(CLOCK_MONOTONIC) is
not longer a multiple of tick periods, which breaks applications
which relied on that behaviour.
Cure this by aligning the tick starting point to the next multiple of
tick periods, i.e 1000ms/CONFIG_HZ.
- A set of NOHZ fixes and enhancements:
* Cure the concurrent writer race for idle and IO sleeptime
statistics
The statitic values which are exposed via /proc/stat are updated
from the CPU local idle exit and remotely by cpufreq, but that
happens without any form of serialization. As a consequence
sleeptimes can be accounted twice or worse.
Prevent this by restricting the accumulation writeback to the CPU
local idle exit and let the remote access compute the accumulated
value.
* Protect idle/iowait sleep time with a sequence count
Reading idle/iowait sleep time, e.g. from /proc/stat, can race
with idle exit updates. As a consequence the readout may result
in random and potentially going backwards values.
Protect this by a sequence count, which fixes the idle time
statistics issue, but cannot fix the iowait time problem because
iowait time accounting races with remote wake ups decrementing
the remote runqueues nr_iowait counter. The latter is impossible
to fix, so the only way to deal with that is to document it
properly and to remove the assertion in the selftest which
triggers occasionally due to that.
* Restructure struct tick_sched for better cache layout
* Some small cleanups and a better cache layout for struct
tick_sched
- Implement the missing timer_wait_running() callback for POSIX CPU
timers
For unknown reason the introduction of the timer_wait_running()
callback missed to fixup posix CPU timers, which went unnoticed for
almost four years.
While initially only targeted to prevent livelocks between a timer
deletion and the timer expiry function on PREEMPT_RT enabled kernels,
it turned out that fixing this for mainline is not as trivial as just
implementing a stub similar to the hrtimer/timer callbacks.
The reason is that for CONFIG_POSIX_CPU_TIMERS_TASK_WORK enabled
systems there is a livelock issue independent of RT.
CONFIG_POSIX_CPU_TIMERS_TASK_WORK=y moves the expiry of POSIX CPU
timers out from hard interrupt context to task work, which is handled
before returning to user space or to a VM. The expiry mechanism moves
the expired timers to a stack local list head with sighand lock held.
Once sighand is dropped the task can be preempted and a task which
wants to delete a timer will spin-wait until the expiry task is
scheduled back in. In the worst case this will end up in a livelock
when the preempting task and the expiry task are pinned on the same
CPU.
The timer wheel has a timer_wait_running() mechanism for RT, which
uses a per CPU timer-base expiry lock which is held by the expiry
code and the task waiting for the timer function to complete blocks
on that lock.
This does not work in the same way for posix CPU timers as there is
no timer base and expiry for process wide timers can run on any task
belonging to that process, but the concept of waiting on an expiry
lock can be used too in a slightly different way.
Add a per task mutex to struct posix_cputimers_work, let the expiry
task hold it accross the expiry function and let the deleting task
which waits for the expiry to complete block on the mutex.
In the non-contended case this results in an extra
mutex_lock()/unlock() pair on both sides.
This avoids spin-waiting on a task which is scheduled out, prevents
the livelock and cures the problem for RT and !RT systems
* tag 'timers-core-2023-04-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
posix-cpu-timers: Implement the missing timer_wait_running callback
selftests/proc: Assert clock_gettime(CLOCK_BOOTTIME) VS /proc/uptime monotonicity
selftests/proc: Remove idle time monotonicity assertions
MAINTAINERS: Remove stale email address
timers/nohz: Remove middle-function __tick_nohz_idle_stop_tick()
timers/nohz: Add a comment about broken iowait counter update race
timers/nohz: Protect idle/iowait sleep time under seqcount
timers/nohz: Only ever update sleeptime from idle exit
timers/nohz: Restructure and reshuffle struct tick_sched
tick/common: Align tick period with the HZ tick.
selftests/timers/posix_timers: Test delivery of signals across threads
posix-timers: Prefer delivery of signals to the current thread
vdso: Improve cmd_vdso_check to check all dynamic relocations
Provide a ptrace set/get interface for syscall user dispatch. The main
purpose is to enable checkpoint/restore (CRIU) to handle processes which
utilize syscall user dispatch correctly.
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Merge tag 'core-entry-2023-04-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core entry/ptrace update from Thomas Gleixner:
"Provide a ptrace set/get interface for syscall user dispatch. The main
purpose is to enable checkpoint/restore (CRIU) to handle processes
which utilize syscall user dispatch correctly"
* tag 'core-entry-2023-04-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
selftest, ptrace: Add selftest for syscall user dispatch config api
ptrace: Provide set/get interface for syscall user dispatch
syscall_user_dispatch: Untag selector address before access_ok()
syscall_user_dispatch: Split up set_syscall_user_dispatch()
involved in it can get CCed on patches
- Add some more CPUID leafs to the kcpuid tool and extend its
functionality to be more useful when grepping for CPUID bits
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Merge tag 'x86_misc_for_v6.4_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc x86 updates from Borislav Petkov:
- Add a x86 hw vulnerabilities section to MAINTAINERS so that the folks
involved in it can get CCed on patches
- Add some more CPUID leafs to the kcpuid tool and extend its
functionality to be more useful when grepping for CPUID bits
* tag 'x86_misc_for_v6.4_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
MAINTAINERS: Add x86 hardware vulnerabilities section
tools/x86/kcpuid: Dump the CPUID function in detailed view
tools/x86/kcpuid: Update AMD leaf Fn80000001
tools/x86/kcpuid: Fix avx512bw and avx512lvl fields in Fn00000007
iter_pass_iter_ptr_to_subprog subtest is relying on actual array size
being passed as subprog parameter. This combined with recent fixes to
precision tracking in conditional jumps ([0]) is now causing verifier to
backtrack all the way to the point where sum() and fill() subprogs are
called, at which point precision backtrack bails out and forces all the
states to have precise SCALAR registers. This in turn causes each
possible value of i within fill() and sum() subprogs to cause
a different non-equivalent state, preventing iterator code to converge.
For now, change the test to assume fixed size of passed in array. Once
BPF verifier supports precision tracking across subprogram calls, these
changes will be reverted as unnecessary.
[0] 71b547f56124 ("bpf: Fix incorrect verifier pruning due to missing register precision taints")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20230424235128.1941726-1-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Merge tag 'v6.4/vfs.open' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs open fixlet from Christian Brauner:
"EINVAL ist keinmal: This contains the changes to make O_DIRECTORY when
specified together with O_CREAT an invalid request.
The wider background is that a regression report about the behavior of
O_DIRECTORY | O_CREAT was sent to fsdevel about a behavior that was
changed multiple years and LTS releases earlier during v5.7
development.
This has also been covered in
https://lwn.net/Articles/926782/
which provides an excellent summary of the discussion"
* tag 'v6.4/vfs.open' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
open: return EINVAL for O_DIRECTORY | O_CREAT
As reported by Kumar in [0], the shared ownership implementation for BPF
programs has some race conditions which need to be addressed before it
can safely be used. This patch does so in a minimal way instead of
ripping out shared ownership entirely, as proper fixes for the issues
raised will follow ASAP, at which point this patch's commit can be
reverted to re-enable shared ownership.
The patch removes the ability to call bpf_refcount_acquire_impl from BPF
programs. Programs can only bump refcount and obtain a new owning
reference using this kfunc, so removing the ability to call it
effectively disables shared ownership.
Instead of changing success / failure expectations for
bpf_refcount-related selftests, this patch just disables them from
running for now.
[0]: https://lore.kernel.org/bpf/d7hyspcow5wtjcmw4fugdgyp3fwhljwuscp3xyut5qnwivyeru@ysdq543otzv2/
Reported-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com>
Link: https://lore.kernel.org/r/20230424204321.2680232-1-davemarchevsky@fb.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Merge tag 'v6.4/kernel.clone3.tests' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
Pull clone3 selftest fix from Christian Brauner:
"This is a single fix to the clone3() selftstests.
It fell through the sefltest tree cracks a few times so I'll provide
it here. It has low urgency but we should still correctly report the
number of tests"
* tag 'v6.4/kernel.clone3.tests' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
selftests/clone3: fix number of tests in ksft_set_plan
still a fair amount going on, including:
- Reorganizing the architecture-specific documentation under
Documentation/arch. This makes the structure match the source directory
and helps to clean up the mess that is the top-level Documentation
directory a bit. This work creates the new directory and moves x86 and
most of the less-active architectures there. The current plan is to move
the rest of the architectures in 6.5, with the patches going through the
appropriate subsystem trees.
- Some more Spanish translations and maintenance of the Italian
translation.
- A new "Kernel contribution maturity model" document from Ted.
- A new tutorial on quickly building a trimmed kernel from Thorsten.
Plus the usual set of updates and fixes.
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Merge tag 'docs-6.4' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet:
"Commit volume in documentation is relatively low this time, but there
is still a fair amount going on, including:
- Reorganize the architecture-specific documentation under
Documentation/arch
This makes the structure match the source directory and helps to
clean up the mess that is the top-level Documentation directory a
bit. This work creates the new directory and moves x86 and most of
the less-active architectures there.
The current plan is to move the rest of the architectures in 6.5,
with the patches going through the appropriate subsystem trees.
- Some more Spanish translations and maintenance of the Italian
translation
- A new "Kernel contribution maturity model" document from Ted
- A new tutorial on quickly building a trimmed kernel from Thorsten
Plus the usual set of updates and fixes"
* tag 'docs-6.4' of git://git.lwn.net/linux: (47 commits)
media: Adjust column width for pdfdocs
media: Fix building pdfdocs
docs: clk: add documentation to log which clocks have been disabled
docs: trace: Fix typo in ftrace.rst
Documentation/process: always CC responsible lists
docs: kmemleak: adjust to config renaming
ELF: document some de-facto PT_* ABI quirks
Documentation: arm: remove stih415/stih416 related entries
docs: turn off "smart quotes" in the HTML build
Documentation: firmware: Clarify firmware path usage
docs/mm: Physical Memory: Fix grammar
Documentation: Add document for false sharing
dma-api-howto: typo fix
docs: move m68k architecture documentation under Documentation/arch/
docs: move parisc documentation under Documentation/arch/
docs: move ia64 architecture docs under Documentation/arch/
docs: Move arc architecture docs under Documentation/arch/
docs: move nios2 documentation under Documentation/arch/
docs: move openrisc documentation under Documentation/arch/
docs: move superh documentation under Documentation/arch/
...
This KUnit update Linux 6.4-rc1 consists of:
- several fixes to kunit tool
- new klist structure test
- support for m68k under QEMU
- support for overriding the QEMU serial port
- support for SH under QEMU
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Merge tag 'linux-kselftest-kunit-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull KUnit updates from Shuah Khan:
- several fixes to kunit tool
- new klist structure test
- support for m68k under QEMU
- support for overriding the QEMU serial port
- support for SH under QEMU
* tag 'linux-kselftest-kunit-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
kunit: add tests for using current KUnit test field
kunit: tool: Add support for SH under QEMU
kunit: tool: Add support for overriding the QEMU serial port
.gitignore: Unignore .kunitconfig
list: test: Test the klist structure
kunit: increase KUNIT_LOG_SIZE to 2048 bytes
kunit: Use gfp in kunit_alloc_resource() kernel-doc
kunit: tool: fix pre-existing `mypy --strict` errors and update run_checks.py
kunit: tool: remove unused imports and variables
kunit: tool: add subscripts for type annotations where appropriate
kunit: fix bug of extra newline characters in debugfs logs
kunit: fix bug in the order of lines in debugfs logs
kunit: fix bug in debugfs logs of parameterized tests
kunit: tool: Add support for m68k under QEMU
linux-kselftest-next-6.4-rc1
This Kselftest update for Linux 6.4-rc1 consists of:
- several patches to enhance and fix resctrl test
- nolibc support for kselftest with an addition to vprintf() to
tools/nolibc/stdio and related test changes
- Refactor 'peeksiginfo' ptrace test part
- add 'malloc' failures checks in cgroup test_memcontrol
- a new prctl test
- enhancements sched test with additional ore schedule prctl calls
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Merge tag 'linux-kselftest-next-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull Kselftest updates from Shuah Khan:
- several patches to enhance and fix resctrl test
- nolibc support for kselftest with an addition to vprintf() to
tools/nolibc/stdio and related test changes
- Refactor 'peeksiginfo' ptrace test part
- add 'malloc' failures checks in cgroup test_memcontrol
- a new prctl test
- enhancements sched test with additional ore schedule prctl calls
* tag 'linux-kselftest-next-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (25 commits)
selftests/resctrl: Fix incorrect error return on test complete
selftests/resctrl: Remove duplicate codes that clear each test result file
selftests/resctrl: Commonize the signal handler register/unregister for all tests
selftests/resctrl: Cleanup properly when an error occurs in CAT test
selftests/resctrl: Flush stdout file buffer before executing fork()
selftests/resctrl: Return MBA check result and make it to output message
selftests/resctrl: Fix set up schemata with 100% allocation on first run in MBM test
selftests/resctrl: Use correct exit code when tests fail
kselftest/arm64: Convert za-fork to use kselftest.h
kselftest: Support nolibc
tools/nolibc/stdio: Implement vprintf()
selftests/resctrl: Correct get_llc_perf() param in function comment
selftests/resctrl: Use remount_resctrlfs() consistently with boolean
selftests/resctrl: Change name from CBM_MASK_PATH to INFO_PATH
selftests/resctrl: Change initialize_llc_perf() return type to void
selftests/resctrl: Replace obsolete memalign() with posix_memalign()
selftests/resctrl: Check for return value after write_schemata()
selftests/resctrl: Allow ->setup() to return errors
selftests/resctrl: Move ->setup() call outside of test specific branches
selftests/resctrl: Return NULL if malloc_and_init_memory() did not alloc mem
...
o MAINTAINERS files additions and changes.
o Fix hotplug warning in nohz code.
o Tick dependency changes by Zqiang.
o Lazy-RCU shrinker fixes by Zqiang.
o rcu-tasks stall reporting improvements by Neeraj.
o Initial changes for renaming of k[v]free_rcu() to its new k[v]free_rcu_mightsleep()
name for robustness.
o Documentation Updates:
o Significant changes to srcu_struct size.
o Deadlock detection for srcu_read_lock() vs synchronize_srcu() from Boqun.
o rcutorture and rcu-related tool, which are targeted for v6.4 from Boqun's tree.
o Other misc changes.
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Merge tag 'rcu.6.4.april5.2023.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux
Pull RCU updates from Joel Fernandes:
- Updates and additions to MAINTAINERS files, with Boqun being added to
the RCU entry and Zqiang being added as an RCU reviewer.
I have also transitioned from reviewer to maintainer; however, Paul
will be taking over sending RCU pull-requests for the next merge
window.
- Resolution of hotplug warning in nohz code, achieved by fixing
cpu_is_hotpluggable() through interaction with the nohz subsystem.
Tick dependency modifications by Zqiang, focusing on fixing usage of
the TICK_DEP_BIT_RCU_EXP bitmask.
- Avoid needless calls to the rcu-lazy shrinker for CONFIG_RCU_LAZY=n
kernels, fixed by Zqiang.
- Improvements to rcu-tasks stall reporting by Neeraj.
- Initial renaming of k[v]free_rcu() to k[v]free_rcu_mightsleep() for
increased robustness, affecting several components like mac802154,
drbd, vmw_vmci, tracing, and more.
A report by Eric Dumazet showed that the API could be unknowingly
used in an atomic context, so we'd rather make sure they know what
they're asking for by being explicit:
https://lore.kernel.org/all/20221202052847.2623997-1-edumazet@google.com/
- Documentation updates, including corrections to spelling,
clarifications in comments, and improvements to the srcu_size_state
comments.
- Better srcu_struct cache locality for readers, by adjusting the size
of srcu_struct in support of SRCU usage by Christoph Hellwig.
- Teach lockdep to detect deadlocks between srcu_read_lock() vs
synchronize_srcu() contributed by Boqun.
Previously lockdep could not detect such deadlocks, now it can.
- Integration of rcutorture and rcu-related tools, targeted for v6.4
from Boqun's tree, featuring new SRCU deadlock scenarios, test_nmis
module parameter, and more
- Miscellaneous changes, various code cleanups and comment improvements
* tag 'rcu.6.4.april5.2023.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux: (71 commits)
checkpatch: Error out if deprecated RCU API used
mac802154: Rename kfree_rcu() to kvfree_rcu_mightsleep()
rcuscale: Rename kfree_rcu() to kfree_rcu_mightsleep()
ext4/super: Rename kfree_rcu() to kfree_rcu_mightsleep()
net/mlx5: Rename kfree_rcu() to kfree_rcu_mightsleep()
net/sysctl: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
lib/test_vmalloc.c: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
tracing: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
misc: vmw_vmci: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
drbd: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
rcu: Protect rcu_print_task_exp_stall() ->exp_tasks access
rcu: Avoid stack overflow due to __rcu_irq_enter_check_tick() being kprobe-ed
rcu-tasks: Report stalls during synchronize_srcu() in rcu_tasks_postscan()
rcu: Permit start_poll_synchronize_rcu_expedited() to be invoked early
rcu: Remove never-set needwake assignment from rcu_report_qs_rdp()
rcu: Register rcu-lazy shrinker only for CONFIG_RCU_LAZY=y kernels
rcu: Fix missing TICK_DEP_MASK_RCU_EXP dependency check
rcu: Fix set/clear TICK_DEP_BIT_RCU_EXP bitmask race
rcu/trace: use strscpy() to instead of strncpy()
tick/nohz: Fix cpu_is_hotpluggable() by checking with nohz subsystem
...
o Add support for loongarch.
o Fix stack-protector issues.
o Support additional integral types and signal-related macros.
o Add support for stdin, stdout, and stderr.
o Add getuid() and geteuid().
o Allow S_I* macros to be overridden by program.
o Defer to linux/fcntl.h and linux/stat.h to avoid duplicate
definitions.
o Many improvements to the self tests.
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Merge tag 'nolibc.2023.04.04a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull nolibc updates from Paul McKenney:
- Add support for loongarch
- Fix stack-protector issues
- Support additional integral types and signal-related macros
- Add support for stdin, stdout, and stderr
- Add getuid() and geteuid()
- Allow S_I* macros to be overridden by program
- Defer to linux/fcntl.h and linux/stat.h to avoid duplicate
definitions
- Many improvements to the selftests
* tag 'nolibc.2023.04.04a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: (22 commits)
tools/nolibc: x86_64: add stackprotector support
tools/nolibc: i386: add stackprotector support
tools/nolibc: tests: add test for -fstack-protector
tools/nolibc: tests: fold in no-stack-protector cflags
tools/nolibc: add support for stack protector
tools/nolibc: tests: constify test_names
tools/nolibc: add helpers for wait() signal exits
tools/nolibc: add definitions for standard fds
selftests/nolibc: Adjust indentation for Makefile
selftests/nolibc: Add support for LoongArch
tools/nolibc: Add support for LoongArch
tools/nolibc: Add statx() and make stat() rely on statx() if necessary
tools/nolibc: Include linux/fcntl.h and remove duplicate code
tools/nolibc: check for S_I* macros before defining them
selftests/nolibc: skip the chroot_root and link_dir tests when not privileged
tools/nolibc: add getuid() and geteuid()
tools/nolibc: add tests for the integer limits in stdint.h
tools/nolibc: enlarge column width of tests
tools/nolibc: add integer types and integer limit macros
tools/nolibc: add stdint.h
...
This update adds tests for nested locking and also adds support for
testing raw spinlocks in PREEMPT_RT kernels.
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Merge tag 'locktorture.2023.04.04a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull locktorture updates from Paul McKenney:
"This adds tests for nested locking and also adds support for testing
raw spinlocks in PREEMPT_RT kernels"
* tag 'locktorture.2023.04.04a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
locktorture: Add raw_spinlock* torture tests for PREEMPT_RT kernels
locktorture: With nested locks, occasionally skip main lock
locktorture: Add nested locking to rtmutex torture tests
locktorture: Add nested locking to mutex torture tests
locktorture: Add nested_[un]lock() hooks and nlocks parameter
This update improves litmus-test documentation and improves the ability
to do before/after tests on the https://github.com/paulmckrcu/litmus repo.
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Merge tag 'lkmm-scripting.2023.04.07a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull Linux Kernel Memory Model scripting updates from Paul McKenney:
"This improves litmus-test documentation and improves the ability to do
before/after tests on the https://github.com/paulmckrcu/litmus repo"
* tag 'lkmm-scripting.2023.04.07a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: (32 commits)
tools/memory-model: Remove out-of-date SRCU documentation
tools/memory-model: Document LKMM test procedure
tools/memory-model: Use "grep -E" instead of "egrep"
tools/memory-model: Use "-unroll 0" to keep --hw runs finite
tools/memory-model: Make judgelitmus.sh handle scripted Result: tag
tools/memory-model: Add data-race capabilities to judgelitmus.sh
tools/memory-model: Add checktheselitmus.sh to run specified litmus tests
tools/memory-model: Repair parseargs.sh header comment
tools/memory-model: Add "--" to parseargs.sh for additional arguments
tools/memory-model: Make history-check scripts use mselect7
tools/memory-model: Make checkghlitmus.sh use mselect7
tools/memory-model: Fix scripting --jobs argument
tools/memory-model: Implement --hw support for checkghlitmus.sh
tools/memory-model: Add -v flag to jingle7 runs
tools/memory-model: Make runlitmus.sh check for jingle errors
tools/memory-model: Allow herd to deduce CPU type
tools/memory-model: Keep assembly-language litmus tests
tools/memory-model: Move from .AArch64.litmus.out to .litmus.AArch.out
tools/memory-model: Make runlitmus.sh generate .litmus.out for --hw
tools/memory-model: Split runlitmus.sh out of checklitmus.sh
...
This update improves LKMM diagnostic messages, unifies handling
of the ordering produced by unlock/lock pairs, adds support for the
smp_mb__after_srcu_read_unlock() macro, removes redundant members from
the to-r relation, brings SRCU read-side semantics into alignment
with Linux-kernel SRCU, makes ppo a subrelation of po, and improves
documentation.
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Merge tag 'lkmm.2023.04.07a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull Linux Kernel Memory Model updates from Paul McKenney
"This improves LKMM diagnostic messages, unifies handling of the
ordering produced by unlock/lock pairs, adds support for the
smp_mb__after_srcu_read_unlock() macro, removes redundant members from
the to-r relation, brings SRCU read-side semantics into alignment with
Linux-kernel SRCU, makes ppo a subrelation of po, and improves
documentation"
* tag 'lkmm.2023.04.07a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
Documentation: litmus-tests: Correct spelling
tools/memory-model: Add documentation about SRCU read-side critical sections
tools/memory-model: Make ppo a subrelation of po
tools/memory-model: Provide exact SRCU semantics
tools/memory-model: Restrict to-r to read-read address dependency
tools/memory-model: Add smp_mb__after_srcu_read_unlock()
tools/memory-model: Unify UNLOCK+LOCK pairings to po-unlock-lock-po
tools/memory-model: Update some warning labels
Support the command testing in a unit-test fashion.
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Link: https://lore.kernel.org/r/20230423221231.6357-1-dave@stgolabs.net
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Timeless and per-thread are orthogonal concepts that are currently
treated as if they are the same (per-thread == timeless). This breaks
when you modify the command line or itrace options to something that the
current logic doesn't expect.
For example:
# Force timeless with Z
--itrace=Zi10i
# Or inconsistent record options
-e cs_etm/timestamp=1/ --per-thread
Adding Z for decoding in per-cpu mode is particularly bad because in
per-thread mode trace channel IDs are discarded and all assumed to be 0,
which would mix trace from different CPUs in per-cpu mode.
Although the results might not be perfect in all scenarios, if the user
requests no timestamps, it should still be possible to decode in either
mode. Especially if the relative times of samples in different processes
aren't interesting, quite a bit of space can be saved by turning off
timestamps in per-cpu mode.
Signed-off-by: James Clark <james.clark@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Denis Nikitin <denik@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Shi <shy828301@gmail.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230424134748.228137-8-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Using u8 for boolean values makes the code a bit more difficult to read
so be more explicit by using bool.
Signed-off-by: James Clark <james.clark@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Denis Nikitin <denik@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Shi <shy828301@gmail.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230424134748.228137-7-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Timestamps and context tracking are automatically enabled in per-core
mode and it's impossible to override this. Use the new utility function
to set them conditionally.
Signed-off-by: James Clark <james.clark@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Denis Nikitin <denik@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Shi <shy828301@gmail.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230424134748.228137-6-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Currently the cs_etm_set_option() function both validates and applies
the config options. Because it's only called when they are added
automatically, there are some paths where the user can apply the option
on the command line and skip the validation. By moving it to the end it
covers both cases.
Also, options don't need to be re-applied anyway, Perf handles parsing
and applying the config terms automatically.
Signed-off-by: James Clark <james.clark@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Denis Nikitin <denik@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Shi <shy828301@gmail.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230424134748.228137-5-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
There is no path in cs-etm where this isn't true so it doesn't need to
be tested. Also re-order the beginning of cs_etm_recording_options() so
that nothing is done until the early exit is passed.
Signed-off-by: James Clark <james.clark@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Denis Nikitin <denik@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Shi <shy828301@gmail.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230424134748.228137-4-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
There is some duplicated code to only override config values if they
haven't already been set by the user so make a util function for this.
Signed-off-by: James Clark <james.clark@arm.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Denis Nikitin <denik@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Shi <shy828301@gmail.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230424134748.228137-3-james.clark@arm.com
[ Moved evsel__set_config_if_unset() to util/pmu.c to avoid dragging stuff into the python binding ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Merge my x86 user copy updates branch.
This cleans up a lot of our x86 memory copy code, particularly for user
accesses. I've been pushing for microarchitectural support for good
memory copying and clearing for a long while, and it's been visible in
how the kernel has aggressively used 'rep movs' and 'rep stos' whenever
possible.
And that micro-architectural support has been improving over the years,
to the point where on modern CPU's the best option for a memory copy
that would become a function call (as opposed to being something that
can just be turned into individual 'mov' instructions) is now to inline
the string instruction sequence instead.
However, that only makes sense when we have the modern markers for this:
the x86 FSRM and FSRS capabilities ("Fast Short REP MOVS/STOS").
So this cleans up a lot of our historical code, gets rid of the legacy
marker use ("REP_GOOD" and "ERMS") from the memcpy/memset cases, and
replaces it with that modern reality. Note that REP_GOOD and ERMS end
up still being used by the known large cases (ie page copyin gand
clearing).
The reason much of this ends up being about user memory accesses is that
the normal in-kernel cases are done by the compiler (__builtin_memcpy()
and __builtin_memset()) and getting to the point where we can use our
instruction rewriting to inline those to be string instructions will
need some compiler support.
In contrast, the user accessor functions are all entirely controlled by
the kernel code, so we can change those arbitrarily.
Thanks to Borislav Petkov for feedback on the series, and Jens testing
some of this on micro-architectures I didn't personally have access to.
* x86-rep-insns:
x86: rewrite '__copy_user_nocache' function
x86: remove 'zerorest' argument from __copy_user_nocache()
x86: set FSRS automatically on AMD CPUs that have FSRM
x86: improve on the non-rep 'copy_user' function
x86: improve on the non-rep 'clear_user' function
x86: inline the 'rep movs' in user copies for the FSRM case
x86: move stac/clac from user copy routines into callers
x86: don't use REP_GOOD or ERMS for user memory clearing
x86: don't use REP_GOOD or ERMS for user memory copies
x86: don't use REP_GOOD or ERMS for small memory clearing
x86: don't use REP_GOOD or ERMS for small memory copies
In this context, timeless refers to the trace data rather than the perf
event data. But when detecting whether there are timestamps in the trace
data or not, the presence of a timestamp flag on any perf event is used.
Since commit f42c0ce573df ("perf record: Always get text_poke events
with --kcore option") timestamps were added to a tracking event when
--kcore is used which breaks this detection mechanism. Fix it by
detecting if trace timestamps exist by looking at the ETM config flags.
This would have always been a more accurate way of doing it anyway.
This fixes the following error message when using --kcore with
Coresight:
$ perf record --kcore -e cs_etm// --per-thread
$ perf report
The perf.data/data data has no samples!
Fixes: f42c0ce573df79d1 ("perf record: Always get text_poke events with --kcore option")
Reported-by: Yang Shi <shy828301@gmail.com>
Signed-off-by: James Clark <james.clark@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: coresight@lists.linaro.org
Cc: denik@google.com
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/lkml/CAHbLzkrJQTrYBtPkf=jf3OpQ-yBcJe7XkvQstX9j2frz4WF-SQ@mail.gmail.com/
Link: https://lore.kernel.org/r/20230424134748.228137-2-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This makes the logic a bit clear by avoiding the !strcmp() pattern and
also a way to intercept the pointer if we need to do extra validation on
it or to do lazy setting of evsel->name via evsel__name(evsel).
Reviewed-by: "Liang, Kan" <kan.liang@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/lkml/ZEGLM8VehJbS0gP2@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Merge PM core changes, updates related to system sleep support,
operating performance points (OPP) changes and power management
utilities changes for 6.4-rc1:
- Drop unnecessary (void *) conversions from the PM core (Li zeming).
- Add sysfs files to represent time spent in a platform sleep state
during suspend-to-idle and make AMD and Intel PMC drivers use them
(Mario Limonciello).
- Use of_property_present() for testing DT property presence (Rob
Herring).
- Add set_required_opps() callback to the 'struct opp_table', to make
the code paths cleaner (Viresh Kumar).
- Update the pm-graph siute of utilities to v5.11 with the following
changes:
* New script which allows users to install the latest pm-graph
from the upstream github repo.
* Update all the dmesg suspend/resume PM print formats to be able to
process recent timelines using dmesg only.
* Add ethtool output to the log for the system's ethernet device if
ethtool exists.
* Make the tool more robustly handle events where mangled dmesg or
ftrace outputs do not include all the requisite data.
- Make the sleepgraph utility recognize "CPU killed" messages (Xueqin
Luo).
* pm-core:
PM: core: Remove unnecessary (void *) conversions
* pm-sleep:
platform/x86/intel/pmc: core: Report duration of time in HW sleep state
platform/x86/intel/pmc: core: Always capture counters on suspend
platform/x86/amd: pmc: Report duration of time in hw sleep state
PM: Add sysfs files to represent time spent in hardware sleep state
* pm-opp:
OPP: Move required opps configuration to specialized callback
OPP: Handle all genpd cases together in _set_required_opps()
opp: Use of_property_present() for testing DT property presence
* pm-tools:
PM: tools: sleepgraph: Recognize "CPU killed" messages
pm-graph: Update to v5.11
Merge ACPICA material for 6.4-rc1:
- Delete bogus node_array array of pointers from AEST table (Jessica
Clarke).
- Add support for trace buffer extension in GICC to the ACPI MADT
parser (Xiongfeng Wang).
- Add missing macro ACPI_FUNCTION_TRACE() for acpi_ns_repair_HID()
(Xiongfeng Wang).
- Add missing tables to astable (Pedro Falcato).
- Add support for 64 bit loong_arch compilation to ACPICA (Huacai
Chen).
- Add support for ASPT table in disassembler to ACPICA (Jeremi
Piotrowski).
- Add support for Arm's MPAM ACPI table version 2 (Hesham Almatary).
- Update all copyrights/signons in ACPICA to 2023 (Bob Moore).
- Add support for ClockInput resource (v6.5) (Niyas Sait).
- Add RISC-V INTC interrupt controller definition to the list of
supported interrupt controllers for MADT (Sunil V L).
- Add structure definitions for the RISC-V RHCT ACPI table (Sunil V L).
- Address several cases in which the ACPICA code might lead to
undefined behavior (Tamir Duberstein).
- Make ACPICA code support flexible arrays properly (Kees Cook).
- Check null return of ACPI_ALLOCATE_ZEROED in
acpi_db_display_objects() (void0red).
- Add os specific support for Zephyr RTOS to ACPICA (Najumon).
- Update version to 20230331 (Bob Moore).
* acpica: (32 commits)
ACPICA: Update version to 20230331
ACPICA: add os specific support for Zephyr RTOS
ACPICA: ACPICA: check null return of ACPI_ALLOCATE_ZEROED in acpi_db_display_objects
ACPICA: acpi_resource_irq: Replace 1-element arrays with flexible array
ACPICA: acpi_madt_oem_data: Fix flexible array member definition
ACPICA: acpi_dmar_andd: Replace 1-element array with flexible array
ACPICA: acpi_pci_routing_table: Replace fixed-size array with flex array member
ACPICA: struct acpi_resource_dma: Replace 1-element array with flexible array
ACPICA: Introduce ACPI_FLEX_ARRAY
ACPICA: struct acpi_nfit_interleave: Replace 1-element array with flexible array
ACPICA: actbl2: Replace 1-element arrays with flexible arrays
ACPICA: actbl1: Replace 1-element arrays with flexible arrays
ACPICA: struct acpi_resource_vendor: Replace 1-element array with flexible array
ACPICA: Avoid undefined behavior: load of misaligned address
ACPICA: Avoid undefined behavior: member access within misaligned address
ACPICA: Avoid undefined behavior: member access within misaligned address
ACPICA: Avoid undefined behavior: member access within misaligned address
ACPICA: Avoid undefined behavior: member access within misaligned address
ACPICA: Avoid undefined behavior: member access within null pointer
ACPICA: Avoid undefined behavior: applying zero offset to null pointer
...
The bulk of the commits here are for the conversion of drivers to use
void remove callbacks but there's a reasonable amount of other stuff
going on, the pace of development with the SOF code continues to be high
and there's a bunch of new drivers too:
- More core cleanups from Morimto-san.
- Update drivers to have remove() callbacks returning void, mostly
mechanical with some substantial changes.
- Continued feature and simplification work on SOF, including addition
of a no-DSP mode for bringup, HDA MLink and extensions to the IPC4
protocol.
- Hibernation support for CS35L45.
- More DT binding conversions.
- Support for Cirrus Logic CS35L56, Freescale QMC, Maxim MAX98363,
nVidia systems with MAX9809x and RT5631, Realtek RT712, Renesas R-Car
Gen4, Rockchip RK3588 and TI TAS5733.
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Merge tag 'asoc-v6.4' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-next
ASoC: Updates for v6.4
The bulk of the commits here are for the conversion of drivers to use
void remove callbacks but there's a reasonable amount of other stuff
going on, the pace of development with the SOF code continues to be high
and there's a bunch of new drivers too:
- More core cleanups from Morimto-san.
- Update drivers to have remove() callbacks returning void, mostly
mechanical with some substantial changes.
- Continued feature and simplification work on SOF, including addition
of a no-DSP mode for bringup, HDA MLink and extensions to the IPC4
protocol.
- Hibernation support for CS35L45.
- More DT binding conversions.
- Support for Cirrus Logic CS35L56, Freescale QMC, Maxim MAX98363,
nVidia systems with MAX9809x and RT5631, Realtek RT712, Renesas R-Car
Gen4, Rockchip RK3588 and TI TAS5733.
The cxl_mem driver uses debugfs to support poison inject and clear.
Add debugfs to the list of required symbols so that cxl_test can
emulate those poison operations.
Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/4f3aab57fbf1cc3ccde2eb887c5d90566c8d0e90.1681874357.git.alison.schofield@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
CXL devices may report a maximum number of addresses that a device
allows to be poisoned using poison injection. When cxl_test creates
mock CXL memory devices, it defaults to MOCK_INJECT_DEV_MAX==88 for
all mocked memdevs.
Add a sysfs attribute, poison_inject_max to module cxl_mock_mem so
that users can set a custom device injection limit. Fail, and return
-EBUSY, if the mock poison list is not empty.
/sys/bus/platform/drivers/cxl_mock_mem/poison_inject_max
A simple usage model is to set the attribute before running a test in
order to emulate a device's poison handling.
Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/0f25b2862b90013545450222d2199e435c6cc11a.1681874357.git.alison.schofield@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Prior to poison inject support, the mock of 'Get Poison List'
returned a poison list containing a single mocked error record.
Following the addition of poison inject and clear support to the
mock driver, use the mock_poison_list[], rather than faking an
error record. Mock_poison_list[] list tracks the actual poison
inject and clear requests issued by userspace.
Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/0f4242c81821f4982b02cb1009c22783ef66b2f1.1681874357.git.alison.schofield@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Mock the clear of poison by deleting the device:address entry from
the mock_poison_list[]. Behave like a real CXL device and do not fail
if the address is not in the poison list, but offer a dev_dbg()
message.
Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/ecf19743c6572e60971bbd078f67d520cf5bca5d.1681874357.git.alison.schofield@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Mock the injection of poison by storing the device:address entries in
mock_poison_list[]. Enforce a limit of 8 poison injections per memdev
device and 128 total entries for the cxl_test mock driver.
Introducing the mock_poison[] list here, makes it available for use in
the mock of Clear Poison, and the mock of Get Poison List.
Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/f6b7f03541eaa8c2260d3eafadd04afe3f0d7962.1681874357.git.alison.schofield@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Make mock memdevs support the Get Poison List mailbox command.
Return a fake poison error record when the get poison list command
is issued.
This supports testing the kernel tracing and cxl list capabilities
for media errors.
Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/14d661ce3e3a32b7d8e76b8ecc5eb88343b3d09c.1681838292.git.alison.schofield@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Paolo Bonzini
Linus Torvalds
Paolo Abeni
Beau Belgrave
Daniel Bristot de Oliveira
Colin Ian King
Rong Tao
Andrii Nakryiko
Dave Marchevsky
Davidlohr Bueso
James Clark
Arnaldo Carvalho de Melo
Rafael J. Wysocki
Takashi Iwai
Alison Schofield