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2025-07-11Merge back earlier changes related to system suspend and hibernationRafael J. Wysocki
2025-07-07ACPI: fan: Update debug message in fan_get_state_acpi4()Sumeet Pawnikar
Update invalid control value returned debug print with appropriate message as no matching fps control value for checking fan fps count condition. Signed-off-by: Sumeet Pawnikar <sumeet4linux@gmail.com> Link: https://patch.msgid.link/20250705110005.4343-1-sumeet4linux@gmail.com> [ rjw: Subject edits ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-07-07ACPI: PRM: Reduce unnecessary printing to avoid user confusionZhu Qiyu
Commit 088984c8d54c ("ACPI: PRM: Find EFI_MEMORY_RUNTIME block for PRM handler and context") introduced non-essential printing "Failed to find VA for GUID: xxxx, PA: 0x0" which may confuse users to think that something wrong is going on while it is not the case. According to the PRM Spec Section 4.1.2 [1], both static data buffer address and ACPI parameter buffer address may be NULL if they are not needed, so there is no need to print out the "Failed to find VA ... " in those cases. Link: https://uefi.org/sites/default/files/resources/Platform%20Runtime%20Mechanism%20-%20with%20legal%20notice.pdf # [1] Signed-off-by: Zhu Qiyu <qiyuzhu2@amd.com> Link: https://patch.msgid.link/20250704014104.82524-1-qiyuzhu2@amd.com [ rjw: Edits in new comments, subject and changelog ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-07-07ACPI: fan: Replace sprintf() with sysfs_emit()Eslam Khafagy
Replace sprintf() with sysfs_emit() in function show_fine_grain_control() in according to Documentation/filesystems/sysfs.rst. Link: https://lore.kernel.org/all/20250621055200.166361-1-abdelrahmanfekry375@gmail.com/ Signed-off-by: Eslam Khafagy <eslam.medhat1993@gmail.com> Link: https://patch.msgid.link/20250704004002.70839-1-eslam.medhat1993@gmail.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-07-07ACPI: APEI: EINJ: Fix trigger actionsTony Luck
The trigger events are in BIOS memory immediately following the acpi_einj_trigger structure. These were not copied to regular kernel memory for use by apei_exec_ctx_init() so injections in "notrigger=0" mode failed with a message like this: APEI: Invalid action table, unknown instruction type: 123 Fix by allocating a "table_size" block of memory and copying the whole table for use in the rest of the trigger flow. Fixes: 1a35c88302a3 ("ACPI: APEI: EINJ: Fix kernel test sparse warnings") Reported-by: Yi1 Lai <yi1.lai@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com> Link: https://patch.msgid.link/20250703200421.28012-1-tony.luck@intel.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-07-04Merge tag 'acpi-6.16-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI fix from Rafael Wysocki: "Revert a problematic ACPI battery driver change merged recently" * tag 'acpi-6.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: Revert "ACPI: battery: negate current when discharging"
2025-07-03ACPI: PM: Set/clear power.strict_midlayer in prepare/completeRafael J. Wysocki
The ACPI general PM domain and the LPSS PM domain do not expect their mid-layer runtime PM suspend callbacks to be invoked at all during system-wide suspend and resume and they do not expect their runtime resume callbacks to be invoked at any point when runtime PM is disabled for the given device during system suspend and resume, so make acpi_subsys_prepare() set power.strict_midlayer for the given device to express that expectation and make acpi_subsys_complete() clear it. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Link: https://patch.msgid.link/4463062.ejJDZkT8p0@rjwysocki.net
2025-07-03ACPI: processor: fix acpi_object initializationSebastian Ott
Initialization of the local acpi_object in acpi_processor_get_info() only sets the first 4 bytes to zero and is thus incomplete. This is indicated by messages like: acpi ACPI0007:be: Invalid PBLK length [166288104] Fix this by initializing all 16 bytes of the processor member of that union. Signed-off-by: Sebastian Ott <sebott@redhat.com> Link: https://patch.msgid.link/20250703124215.12522-1-sebott@redhat.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-07-03ACPI: APEI: GHES: add TAINT_MACHINE_CHECK on GHES panic pathBreno Leitao
When a GHES (Generic Hardware Error Source) triggers a panic, add the TAINT_MACHINE_CHECK taint flag to the kernel. This explicitly marks the kernel as tainted due to a machine check event, improving diagnostics and post-mortem analysis. The taint is set with LOCKDEP_STILL_OK to indicate lockdep remains valid. At large scale deployment, this helps to quickly determine panics that are coming due to hardware failures. Signed-off-by: Breno Leitao <leitao@debian.org> Reviewed-by: Tony Luck <tony.luck@intel.com> Link: https://patch.msgid.link/20250702-add_tain-v1-1-9187b10914b9@debian.org Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-07-03Revert "ACPI: battery: negate current when discharging"Rafael J. Wysocki
Revert commit 234f71555019 ("ACPI: battery: negate current when discharging") breaks not one but several userspace implementations of battery monitoring: Steam and MangoHud. Perhaps it breaks more, but those are the two that have been tested. Reported-by: Matthew Schwartz <matthew.schwartz@linux.dev> Closes: https://lore.kernel.org/linux-acpi/87C1B2AF-D430-4568-B620-14B941A8ABA4@linux.dev/ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-07-02ACPI: LPSS: Remove AudioDSP related IDAndy Shevchenko
The AudioDSP drivers are in control for all functions of the hardware they have (they are multi-functional devices). The LPSS driver prepares for enumeration only single devices, such as DMA, UART, SPI, I²C. Hence the registration of AudioDSP should not be covered. Moreover, the very same ACPI _HID has been added by the catpt driver a few years ago. And even more serious issue with this, is that the register window at offset 0x800 is actually D-SRAM0 in case of AudioDSP and writing to it is a data corruption. That all being said, remove the AudioDSP ID from the LPSS driver, where it doesn't belong to. Fixes: c2f8783fa2d0 ("ASoC: Intel: Add common SST driver loader on ACPI systems") Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com> Tested-by: Cezary Rojewski <cezary.rojewski@intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://patch.msgid.link/20250626132635.221064-1-andriy.shevchenko@linux.intel.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-07-02ACPI: fan: Replace sprintf()/scnprintf() with sysfs_emit() in show() functionsAbdelrahman Fekry
Update two sysfs show() functions in the ACPI fan driver to use sysfs_emit() and sysfs_emit_at() instead of sprintf() and scnprintf(). - show_fan_speed(): replaced sprintf() with sysfs_emit(). - show_state(): replaced scnprintf() with sysfs_emit() for the first write, and retained sysfs_emit_at() for incremental writes. This change is in accordance with Documentation/filesystems/sysfs.rst, which recommends using sysfs_emit/sysfs_emit_at in all sysfs show() callbacks for buffer safety, clarity, and consistency. Signed-off-by: Abdelrahman Fekry <abdelrahmanfekry375@gmail.com> Link: https://patch.msgid.link/20250621055200.166361-1-abdelrahmanfekry375@gmail.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-07-02ACPI: PM: Set .detach in acpi_general_pm_domain definitionRafael J. Wysocki
Instead of setting the .detach callback pointer for acpi_general_pm_domain every time it is attached to a device, which is confusing, set it once in the definition of acpi_general_pm_domain. No intentional functional impact. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Link: https://patch.msgid.link/4665476.LvFx2qVVIh@rjwysocki.net Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-30ACPI: pfr_update: Add more debug information when firmware update failedChen Yu
Users reported insufficient error information for debugging during firmware update failures on certain platforms. Add verbose error logs in the error code path to enhance debuggability. Reported-by: "Govindarajulu, Hariganesh" <hariganesh.govindarajulu@intel.com> Signed-off-by: Chen Yu <yu.c.chen@intel.com> Link: https://patch.msgid.link/20250604022956.3723438-1-yu.c.chen@intel.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-27acpi: nfit: intel: avoid multiple -Wflex-array-member-not-at-end warningsGustavo A. R. Silva
-Wflex-array-member-not-at-end was introduced in GCC-14, and we are getting ready to enable it, globally. Use the new TRAILING_OVERLAP() helper to fix a dozen instances of the following type of warning: drivers/acpi/nfit/intel.c:692:35: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end] Acked-by: Dan Williams <dan.j.williams@intel.com> Tested-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Link: https://lore.kernel.org/r/aF7pF4kej8VQapyR@kspp Signed-off-by: Kees Cook <kees@kernel.org>
2025-06-26ACPI: proc: Prefer to use octal permissionAndy Shevchenko
Octal permissions are preferred over the symbolics ones for readbility. This ceases warning message pointed by checkpatch. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://patch.msgid.link/20250612201321.3536493-6-andriy.shevchenko@linux.intel.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-26ACPI: proc: Use str_enabled_disabled() helperAndy Shevchenko
Replace ternary (condition ? "enabled" : "disabled") with str_enabled_disabled() from string_choices.h to improve readability, maintain uniform string usage, and reduce binary size through linker deduplication. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://patch.msgid.link/20250612201321.3536493-5-andriy.shevchenko@linux.intel.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-26ACPI: proc: Remove unused headerAndy Shevchenko
With `make W=1` build we get a warning: drivers/acpi/proc.c: warning: EXPORT_SYMBOL() is not used, but #include <linux/export.h> is present Fix it by removing unused inclusion. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://patch.msgid.link/20250612201321.3536493-4-andriy.shevchenko@linux.intel.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-26ACPI: proc: Use correct format specifier and drop castingAndy Shevchenko
The format string in acpi_system_wakeup_device_seq_show() uses incorrect specifier along with explicit (unneeded) casting. Drop the latter and update the former. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://patch.msgid.link/20250612201321.3536493-3-andriy.shevchenko@linux.intel.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-26ACPI: wakeup: Drop unneeded casting for sleep_stateAndy Shevchenko
Back to the original patch [1] sleep_state was defined as a custom acpi_integer type variable. Nowadays it's plain u64. No need to have casting for it anymore. Link: https://bugzilla.kernel.org/show_bug.cgi?id=1415 [1] Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://patch.msgid.link/20250612201321.3536493-2-andriy.shevchenko@linux.intel.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-26ACPICA: Decrease `AcpiExTracePoint` verbosityMario Limonciello
Early in kernel boot pointers can't be used and so %p shows up incorrectly: ``` extrace-0138 ex_trace_point : Method Begin [0x(____ptrval____):\M460] execution. ``` Later in the boot %p works, but it's not really actually useful when the pathname can resolve properly. Adjust the debug print so that if the Pathname resolves that the pointer isn't also printed: ``` extrace-0138 ex_trace_point : Method Begin [\M460] execution. ``` Link: https://github.com/acpica/acpica/pull/1013 Link: https://github.com/acpica/acpica/commit/bdc2a4e646f097b693aa60f1f2c4228d1e31b0d1 Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Link: https://patch.msgid.link/20250609032839.525087-1-superm1@kernel.org Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-26ACPI: APEI: EINJ: Fix check and iounmap of uninitialized pointer pColin Ian King
In the case where a request_mem_region call fails and pointer r is null the error exit path via label 'out' will check for a non-null pointer p and try to iounmap it. However, pointer p has not been assigned a value at this point, so it may potentially contain any garbage value. Fix this by ensuring pointer p is initialized to NULL. Fixes: 1a35c88302a3 ("ACPI: APEI: EINJ: Fix kernel test sparse warnings") Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Link: https://patch.msgid.link/20250624202937.523013-1-colin.i.king@gmail.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-26ACPI: APEI: EINJ: Fix less than zero comparison on a size_t variableColin Ian King
The check for c < 0 is always false because variable c is a size_t which is not a signed type. Fix this by making c a ssize_t. Fixes: 90711f7bdf76 ("ACPI: APEI: EINJ: Create debugfs files to enter device id and syndrome") Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Link: https://patch.msgid.link/20250624201032.522168-1-colin.i.king@gmail.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-26ACPI: APEI: EINJ: prevent memory corruption in error_type_set()Dan Carpenter
The "einj_buf" buffer is 32 chars. If "count" is larger than that it results in memory corruption. Cap it at 31 so that we leave the last character as a NUL terminator. By the way, the highest reasonable value for "count" is 24. Fixes: 0c6176e1e186 ("ACPI: APEI: EINJ: Enable the discovery of EINJv2 capabilities") Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Link: https://patch.msgid.link/ae6286cf-4d73-4b97-8c0f-0782a65b8f51@sabinyo.mountain Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-23Merge 6.16-rc3 into driver-core-nextGreg Kroah-Hartman
We need the driver-core fixes that are in 6.16-rc3 into here as well to build on top of. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-06-18ACPICA: Refuse to evaluate a method if arguments are missingRafael J. Wysocki
As reported in [1], a platform firmware update that increased the number of method parameters and forgot to update a least one of its callers, caused ACPICA to crash due to use-after-free. Since this a result of a clear AML issue that arguably cannot be fixed up by the interpreter (it cannot produce missing data out of thin air), address it by making ACPICA refuse to evaluate a method if the caller attempts to pass fewer arguments than expected to it. Closes: https://github.com/acpica/acpica/issues/1027 [1] Reported-by: Peter Williams <peter@newton.cx> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Hans de Goede <hansg@kernel.org> Tested-by: Hans de Goede <hansg@kernel.org> # Dell XPS 9640 with BIOS 1.12.0 Link: https://patch.msgid.link/5909446.DvuYhMxLoT@rjwysocki.net Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-18ACPI: Enable CONFIG_ACPI_DEBUG by defaultMario Limonciello
CONFIG_ACPI_DEBUG can be helpful for getting debug messages on OEM systems to identify a BIOS bug. It's a relatively small size increase to turn it on by default (50kb) and that saves asking people to enable it when an issue comes up because it wasn't in defconfig. Enable it by default. Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Link: https://patch.msgid.link/20250609030706.465202-1-superm1@kernel.org Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-18ACPI: DPTF: Support for Wildcat LakeSrinivas Pandruvada
Add Wildcat Lake ACPI IDs for DPTF. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Link: https://patch.msgid.link/20250617231824.3314507-1-srinivas.pandruvada@linux.intel.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-18ACPI: APEI: EINJ: Enable EINJv2 error injectionsZaid Alali
Enable injection using EINJv2 mode of operation. [Tony: Mostly Zaid's original code. I just changed how the error ID and syndrome bits are implemented. Also swapped out some camelcase variable names] Co-developed-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Zaid Alali <zaidal@os.amperecomputing.com> Link: https://patch.msgid.link/20250617193026.637510-7-zaidal@os.amperecomputing.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-18ACPI: APEI: EINJ: Create debugfs files to enter device id and syndromeTony Luck
EINJv2 allows users to inject multiple errors at the same time by specifying the device id and syndrome bits for each error in a flex array. Create files in the einj debugfs directory to enter data for each device id and syndrome value. Note that the specification says these are 128-bit little-endian values. Linux doesn't have a handy helper to manage objects of this type. Signed-off-by: Tony Luck <tony.luck@intel.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Zaid Alali <zaidal@os.amperecomputing.com> Link: https://patch.msgid.link/20250617193026.637510-6-zaidal@os.amperecomputing.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-18ACPI: APEI: EINJ: Discover EINJv2 parametersZaid Alali
The EINJv2 set_error_type_with_address structure has a flex array to hold the component IDs and syndrome values used when injecting multiple errors at once. Discover the size of this array by taking the address from the ACPI_EINJ_SET_ERROR_TYPE_WITH_ADDRESS entry in the EINJ table and reading the BIOS copy of the structure. Derive the maximum number of components from the length field in the einjv2_extension_struct at the end of the BIOS copy. Map the whole of the structure into kernel memory (and unmap on module unload). [Tony: Code unchanged from Zaid's original. New commit message] Reviewed-by: Tony Luck <tony.luck@intel.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Zaid Alali <zaidal@os.amperecomputing.com> Link: https://patch.msgid.link/20250617193026.637510-5-zaidal@os.amperecomputing.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-18ACPI: APEI: EINJ: Add einjv2 extension structZaid Alali
Add einjv2 extension struct and EINJv2 error types to prepare the driver for EINJv2 support. ACPI specifications[1] enables EINJv2 by extending set_error_type_with_address struct. Link: https://uefi.org/specs/ACPI/6.6/18_Platform_Error_Interfaces.html#einjv2-extension-structure [1] Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Zaid Alali <zaidal@os.amperecomputing.com> Link: https://patch.msgid.link/20250617193026.637510-4-zaidal@os.amperecomputing.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-18ACPI: APEI: EINJ: Enable the discovery of EINJv2 capabilitiesZaid Alali
Enable the driver to show all supported error injections for EINJ and EINJv2 at the same time. EINJv2 capabilities can be discovered by checking the return value of get_error_type, where bit 30 set indicates EINJv2 support. Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Zaid Alali <zaidal@os.amperecomputing.com> Link: https://patch.msgid.link/20250617193026.637510-3-zaidal@os.amperecomputing.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-18ACPI: APEI: EINJ: Fix kernel test sparse warningsZaid Alali
This patch fixes the kernel test robot warning reported here: Link: https://lore.kernel.org/all/202410241620.oApALow5-lkp@intel.com/ Use pointers annotated with the __iomem marker for all iomem map calls, and creates a local copy of the mapped IO memory for future access in the code. memcpy_fromio() and memcpy_toio() are used to read/write data from/to mapped IO memory. Reviewed-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Zaid Alali <zaidal@os.amperecomputing.com> Link: https://patch.msgid.link/20250617193026.637510-2-zaidal@os.amperecomputing.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-17sysfs: treewide: switch back to attribute_group::bin_attrsThomas Weißschuh
The normal bin_attrs field can now handle const pointers. This makes the _new variant unnecessary. Switch all users back. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Link: https://lore.kernel.org/r/20250530-sysfs-const-bin_attr-final-v3-4-724bfcf05b99@weissschuh.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-06-17sysfs: treewide: switch back to bin_attribute::read()/write()Thomas Weißschuh
The bin_attribute argument of bin_attribute::read() is now const. This makes the _new() callbacks unnecessary. Switch all users back. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Link: https://lore.kernel.org/r/20250530-sysfs-const-bin_attr-final-v3-3-724bfcf05b99@weissschuh.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-06-13Merge tag 'acpi-6.16-rc2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI fixes from Rafael Wysocki: "These fix an ACPI APEI error injection driver failure that started to occur after switching it over to using a faux device, address an EC driver issue related to invalid ECDT tables, clean up the usage of mwait_idle_with_hints() in the ACPI PAD driver, add a new IRQ override quirk, and fix a NULL pointer dereference related to nosmp: - Update the faux device handling code in the driver core and address an ACPI APEI error injection driver failure that started to occur after switching it over to using a faux device on top of that (Dan Williams) - Update data types of variables passed as arguments to mwait_idle_with_hints() in the ACPI PAD (processor aggregator device) driver to match the function definition after recent changes (Uros Bizjak) - Fix a NULL pointer dereference in the ACPI CPPC library that occurs when nosmp is passed to the kernel in the command line (Yunhui Cui) - Ignore ECDT tables with an invalid ID string to prevent using an incorrect GPE for signaling events on some systems (Armin Wolf) - Add a new IRQ override quirk for MACHENIKE 16P (Wentao Guan)" * tag 'acpi-6.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI: resource: Use IRQ override on MACHENIKE 16P ACPI: EC: Ignore ECDT tables with an invalid ID string ACPI: CPPC: Fix NULL pointer dereference when nosmp is used ACPI: PAD: Update arguments of mwait_idle_with_hints() ACPI: APEI: EINJ: Do not fail einj_init() on faux_device_create() failure driver core: faux: Quiet probe failures driver core: faux: Suppress bind attributes
2025-06-13Merge branches 'acpi-pad', 'acpi-cppc', 'acpi-ec' and 'acpi-resource'Rafael J. Wysocki
Merge assorted ACPI updates for 6.16-rc2: - Update data types of variables passed as arguments to mwait_idle_with_hints() in the ACPI PAD (processor aggregator device) driver to match the function definition after recent changes (Uros Bizjak). - Fix a NULL pointer dereference in the ACPI CPPC library that occurs when nosmp is passed to the kernel in the command line (Yunhui Cui). - Ignore ECDT tables with an invalid ID string to prevent using an incorrect GPE for signaling events on some systems (Armin Wolf). - Add a new IRQ override quirk for MACHENIKE 16P (Wentao Guan). * acpi-pad: ACPI: PAD: Update arguments of mwait_idle_with_hints() * acpi-cppc: ACPI: CPPC: Fix NULL pointer dereference when nosmp is used * acpi-ec: ACPI: EC: Ignore ECDT tables with an invalid ID string * acpi-resource: ACPI: resource: Use IRQ override on MACHENIKE 16P
2025-06-13Merge branch 'pm-cpuidle'Rafael J. Wysocki
Merge cpuidle updates for 6.16-rc2: - Update data types of variables passed as arguments to mwait_idle_with_hints() to match the function definition after recent changes (Uros Bizjak). - Eliminate mwait_play_dead_cpuid_hint() again after reverting its elimination during the merge window due to a problem with handling "dead" SMT siblings, but this time prevent leaving them in C1 after initialization by taking them online and back offline when a proper cpuidle driver for the platform has been registered (Rafael Wysocki). * pm-cpuidle: intel_idle: Update arguments of mwait_idle_with_hints() Reapply "x86/smp: Eliminate mwait_play_dead_cpuid_hint()" ACPI: processor: Rescan "dead" SMT siblings during initialization intel_idle: Rescan "dead" SMT siblings during initialization x86/smp: PM/hibernate: Split arch_resume_nosmt() intel_idle: Use subsys_initcall_sync() for initialization
2025-06-10ACPI: resource: Use IRQ override on MACHENIKE 16PWentao Guan
Use ACPI IRQ override on MACHENIKE laptop to make the internal keyboard work. Add a new entry to the irq1_edge_low_force_override structure, similar to the existing ones. Link: https://bbs.deepin.org.cn/zh/post/287628 Signed-off-by: Wentao Guan <guanwentao@uniontech.com> Link: https://patch.msgid.link/20250603122059.1072790-1-guanwentao@uniontech.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-10ACPI: EC: Ignore ECDT tables with an invalid ID stringArmin Wolf
On the MSI Modern 14 C5M the ECDT table contains invalid data: UID : 00000000 GPE Number : 00 /* Invalid, 03 would be correct */ Namepath : "" /* Invalid, "\_SB.PCI0.SBRG.EC" would * be correct */ This slows down the EC access as the wrong GPE event is used for communication. Additionally the ID string is invalid. Ignore such faulty ECDT tables by verifying that the ID string has a valid format. Tested-by: glpnk@proton.me Signed-off-by: Armin Wolf <W_Armin@gmx.de> Link: https://patch.msgid.link/20250529235310.540530-1-W_Armin@gmx.de Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-10ACPI: CPPC: Fix NULL pointer dereference when nosmp is usedYunhui Cui
With nosmp in cmdline, other CPUs are not brought up, leaving their cpc_desc_ptr NULL. CPU0's iteration via for_each_possible_cpu() dereferences these NULL pointers, causing panic. Panic backtrace: [ 0.401123] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000b8 ... [ 0.403255] [<ffffffff809a5818>] cppc_allow_fast_switch+0x6a/0xd4 ... Kernel panic - not syncing: Attempted to kill init! Fixes: 3cc30dd00a58 ("cpufreq: CPPC: Enable fast_switch") Reported-by: Xu Lu <luxu.kernel@bytedance.com> Signed-off-by: Yunhui Cui <cuiyunhui@bytedance.com> Link: https://patch.msgid.link/20250604023036.99553-1-cuiyunhui@bytedance.com [ rjw: New subject ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-10ACPI: PAD: Update arguments of mwait_idle_with_hints()Uros Bizjak
Commit a17b37a3f416 ("x86/idle: Change arguments of mwait_idle_with_hints() to u32") changed the type of arguments of mwait_idle_with_hints() from unsigned long to u32. Change the type of variables in the call to mwait_idle_with_hints() to unsigned int to follow the change. Signed-off-by: Uros Bizjak <ubizjak@gmail.com> Link: https://patch.msgid.link/20250609064235.49146-1-ubizjak@gmail.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-10ACPI: APEI: EINJ: Do not fail einj_init() on faux_device_create() failureDan Williams
CXL has a symbol dependency on einj_core.ko, so if einj_init() fails then cxl_core.ko fails to load. Prior to the faux_device_create() conversion, einj_probe() failures were tracked by the einj_initialized flag without failing einj_init(). Revert to that behavior and always succeed einj_init() given there is no way, and no pressing need, to discern faux device-create vs device-probe failures. This situation arose because CXL knows proper kernel named objects to trigger errors against, but acpi-einj knows how to perform the error injection. The injection mechanism is shared with non-CXL use cases. The result is CXL now has a module dependency on einj-core.ko, and init/probe failures are handled at runtime. Fixes: 6cb9441bfe8d ("ACPI: APEI: EINJ: Transition to the faux device interface") Signed-off-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Ben Cheatham <benjamin.cheatham@amd.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://patch.msgid.link/20250607033228.1475625-4-dan.j.williams@intel.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-06-08treewide, timers: Rename from_timer() to timer_container_of()Ingo Molnar
Move this API to the canonical timer_*() namespace. [ tglx: Redone against pre rc1 ] Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/all/aB2X0jCKQO56WdMt@gmail.com
2025-06-07ACPI: processor: Rescan "dead" SMT siblings during initializationRafael J. Wysocki
Make acpi_processor_driver_init() call arch_cpu_rescan_dead_smt_siblings(), via a new wrapper function called acpi_idle_rescan_dead_smt_siblings(), after successfully initializing the driver, to allow the "dead" SMT siblings to go into deep idle states, which is necessary for the processor to be able to reach deep package C-states (like PC10) going forward, so that power can be reduced sufficiently in suspend-to-idle, among other things. However, do it only if the ACPI idle driver is the current cpuidle driver (otherwise it is assumed that another cpuidle driver will take care of this) and avoid doing it on architectures other than x86. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Link: https://patch.msgid.link/2005721.PYKUYFuaPT@rjwysocki.net
2025-06-03Merge tag 'hyperv-next-signed-20250602' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux Pull hyperv updates from Wei Liu: - Support for Virtual Trust Level (VTL) on arm64 (Roman Kisel) - Fixes for Hyper-V UIO driver (Long Li) - Fixes for Hyper-V PCI driver (Michael Kelley) - Select CONFIG_SYSFB for Hyper-V guests (Michael Kelley) - Documentation updates for Hyper-V VMBus (Michael Kelley) - Enhance logging for hv_kvp_daemon (Shradha Gupta) * tag 'hyperv-next-signed-20250602' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: (23 commits) Drivers: hv: Always select CONFIG_SYSFB for Hyper-V guests Drivers: hv: vmbus: Add comments about races with "channels" sysfs dir Documentation: hyperv: Update VMBus doc with new features and info PCI: hv: Remove unnecessary flex array in struct pci_packet Drivers: hv: Remove hv_alloc/free_* helpers Drivers: hv: Use kzalloc for panic page allocation uio_hv_generic: Align ring size to system page uio_hv_generic: Use correct size for interrupt and monitor pages Drivers: hv: Allocate interrupt and monitor pages aligned to system page boundary arch/x86: Provide the CPU number in the wakeup AP callback x86/hyperv: Fix APIC ID and VP index confusion in hv_snp_boot_ap() PCI: hv: Get vPCI MSI IRQ domain from DeviceTree ACPI: irq: Introduce acpi_get_gsi_dispatcher() Drivers: hv: vmbus: Introduce hv_get_vmbus_root_device() Drivers: hv: vmbus: Get the IRQ number from DeviceTree dt-bindings: microsoft,vmbus: Add interrupt and DMA coherence properties arm64, x86: hyperv: Report the VTL the system boots in arm64: hyperv: Initialize the Virtual Trust Level field Drivers: hv: Provide arch-neutral implementation of get_vtl() Drivers: hv: Enable VTL mode for arm64 ...
2025-05-31Merge tag 'mm-stable-2025-05-31-14-50' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM updates from Andrew Morton: - "Add folio_mk_pte()" from Matthew Wilcox simplifies the act of creating a pte which addresses the first page in a folio and reduces the amount of plumbing which architecture must implement to provide this. - "Misc folio patches for 6.16" from Matthew Wilcox is a shower of largely unrelated folio infrastructure changes which clean things up and better prepare us for future work. - "memory,x86,acpi: hotplug memory alignment advisement" from Gregory Price adds early-init code to prevent x86 from leaving physical memory unused when physical address regions are not aligned to memory block size. - "mm/compaction: allow more aggressive proactive compaction" from Michal Clapinski provides some tuning of the (sadly, hard-coded (more sadly, not auto-tuned)) thresholds for our invokation of proactive compaction. In a simple test case, the reduction of a guest VM's memory consumption was dramatic. - "Minor cleanups and improvements to swap freeing code" from Kemeng Shi provides some code cleaups and a small efficiency improvement to this part of our swap handling code. - "ptrace: introduce PTRACE_SET_SYSCALL_INFO API" from Dmitry Levin adds the ability for a ptracer to modify syscalls arguments. At this time we can alter only "system call information that are used by strace system call tampering, namely, syscall number, syscall arguments, and syscall return value. This series should have been incorporated into mm.git's "non-MM" branch, but I goofed. - "fs/proc: extend the PAGEMAP_SCAN ioctl to report guard regions" from Andrei Vagin extends the info returned by the PAGEMAP_SCAN ioctl against /proc/pid/pagemap. This permits CRIU to more efficiently get at the info about guard regions. - "Fix parameter passed to page_mapcount_is_type()" from Gavin Shan implements that fix. No runtime effect is expected because validate_page_before_insert() happens to fix up this error. - "kernel/events/uprobes: uprobe_write_opcode() rewrite" from David Hildenbrand basically brings uprobe text poking into the current decade. Remove a bunch of hand-rolled implementation in favor of using more current facilities. - "mm/ptdump: Drop assumption that pxd_val() is u64" from Anshuman Khandual provides enhancements and generalizations to the pte dumping code. This might be needed when 128-bit Page Table Descriptors are enabled for ARM. - "Always call constructor for kernel page tables" from Kevin Brodsky ensures that the ctor/dtor is always called for kernel pgtables, as it already is for user pgtables. This permits the addition of more functionality such as "insert hooks to protect page tables". This change does result in various architectures performing unnecesary work, but this is fixed up where it is anticipated to occur. - "Rust support for mm_struct, vm_area_struct, and mmap" from Alice Ryhl adds plumbing to permit Rust access to core MM structures. - "fix incorrectly disallowed anonymous VMA merges" from Lorenzo Stoakes takes advantage of some VMA merging opportunities which we've been missing for 15 years. - "mm/madvise: batch tlb flushes for MADV_DONTNEED and MADV_FREE" from SeongJae Park optimizes process_madvise()'s TLB flushing. Instead of flushing each address range in the provided iovec, we batch the flushing across all the iovec entries. The syscall's cost was approximately halved with a microbenchmark which was designed to load this particular operation. - "Track node vacancy to reduce worst case allocation counts" from Sidhartha Kumar makes the maple tree smarter about its node preallocation. stress-ng mmap performance increased by single-digit percentages and the amount of unnecessarily preallocated memory was dramaticelly reduced. - "mm/gup: Minor fix, cleanup and improvements" from Baoquan He removes a few unnecessary things which Baoquan noted when reading the code. - ""Enhance sysfs handling for memory hotplug in weighted interleave" from Rakie Kim "enhances the weighted interleave policy in the memory management subsystem by improving sysfs handling, fixing memory leaks, and introducing dynamic sysfs updates for memory hotplug support". Fixes things on error paths which we are unlikely to hit. - "mm/damon: auto-tune DAMOS for NUMA setups including tiered memory" from SeongJae Park introduces new DAMOS quota goal metrics which eliminate the manual tuning which is required when utilizing DAMON for memory tiering. - "mm/vmalloc.c: code cleanup and improvements" from Baoquan He provides cleanups and small efficiency improvements which Baoquan found via code inspection. - "vmscan: enforce mems_effective during demotion" from Gregory Price changes reclaim to respect cpuset.mems_effective during demotion when possible. because presently, reclaim explicitly ignores cpuset.mems_effective when demoting, which may cause the cpuset settings to violated. This is useful for isolating workloads on a multi-tenant system from certain classes of memory more consistently. - "Clean up split_huge_pmd_locked() and remove unnecessary folio pointers" from Gavin Guo provides minor cleanups and efficiency gains in in the huge page splitting and migrating code. - "Use kmem_cache for memcg alloc" from Huan Yang creates a slab cache for `struct mem_cgroup', yielding improved memory utilization. - "add max arg to swappiness in memory.reclaim and lru_gen" from Zhongkun He adds a new "max" argument to the "swappiness=" argument for memory.reclaim MGLRU's lru_gen. This directs proactive reclaim to reclaim from only anon folios rather than file-backed folios. - "kexec: introduce Kexec HandOver (KHO)" from Mike Rapoport is the first step on the path to permitting the kernel to maintain existing VMs while replacing the host kernel via file-based kexec. At this time only memblock's reserve_mem is preserved. - "mm: Introduce for_each_valid_pfn()" from David Woodhouse provides and uses a smarter way of looping over a pfn range. By skipping ranges of invalid pfns. - "sched/numa: Skip VMA scanning on memory pinned to one NUMA node via cpuset.mems" from Libo Chen removes a lot of pointless VMA scanning when a task is pinned a single NUMA mode. Dramatic performance benefits were seen in some real world cases. - "JFS: Implement migrate_folio for jfs_metapage_aops" from Shivank Garg addresses a warning which occurs during memory compaction when using JFS. - "move all VMA allocation, freeing and duplication logic to mm" from Lorenzo Stoakes moves some VMA code from kernel/fork.c into the more appropriate mm/vma.c. - "mm, swap: clean up swap cache mapping helper" from Kairui Song provides code consolidation and cleanups related to the folio_index() function. - "mm/gup: Cleanup memfd_pin_folios()" from Vishal Moola does that. - "memcg: Fix test_memcg_min/low test failures" from Waiman Long addresses some bogus failures which are being reported by the test_memcontrol selftest. - "eliminate mmap() retry merge, add .mmap_prepare hook" from Lorenzo Stoakes commences the deprecation of file_operations.mmap() in favor of the new file_operations.mmap_prepare(). The latter is more restrictive and prevents drivers from messing with things in ways which, amongst other problems, may defeat VMA merging. - "memcg: decouple memcg and objcg stocks"" from Shakeel Butt decouples the per-cpu memcg charge cache from the objcg's one. This is a step along the way to making memcg and objcg charging NMI-safe, which is a BPF requirement. - "mm/damon: minor fixups and improvements for code, tests, and documents" from SeongJae Park is yet another batch of miscellaneous DAMON changes. Fix and improve minor problems in code, tests and documents. - "memcg: make memcg stats irq safe" from Shakeel Butt converts memcg stats to be irq safe. Another step along the way to making memcg charging and stats updates NMI-safe, a BPF requirement. - "Let unmap_hugepage_range() and several related functions take folio instead of page" from Fan Ni provides folio conversions in the hugetlb code. * tag 'mm-stable-2025-05-31-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (285 commits) mm: pcp: increase pcp->free_count threshold to trigger free_high mm/hugetlb: convert use of struct page to folio in __unmap_hugepage_range() mm/hugetlb: refactor __unmap_hugepage_range() to take folio instead of page mm/hugetlb: refactor unmap_hugepage_range() to take folio instead of page mm/hugetlb: pass folio instead of page to unmap_ref_private() memcg: objcg stock trylock without irq disabling memcg: no stock lock for cpu hot-unplug memcg: make __mod_memcg_lruvec_state re-entrant safe against irqs memcg: make count_memcg_events re-entrant safe against irqs memcg: make mod_memcg_state re-entrant safe against irqs memcg: move preempt disable to callers of memcg_rstat_updated memcg: memcg_rstat_updated re-entrant safe against irqs mm: khugepaged: decouple SHMEM and file folios' collapse selftests/eventfd: correct test name and improve messages alloc_tag: check mem_profiling_support in alloc_tag_init Docs/damon: update titles and brief introductions to explain DAMOS selftests/damon/_damon_sysfs: read tried regions directories in order mm/damon/tests/core-kunit: add a test for damos_set_filters_default_reject() mm/damon/paddr: remove unused variable, folio_list, in damon_pa_stat() mm/damon/sysfs-schemes: fix wrong comment on damons_sysfs_quota_goal_metric_strs ...
2025-05-30Merge tag 'acpi-6.16-rc1-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI fixes from Rafael Wysocki: "These address issues introduced by recent ACPI changes merged previously: - Unbreak acpi_ut_safe_strncpy() by restoring its previous behavior changed incorrectly by a recent update (Ahmed Salem) - Make a new static checker warning in the recently introduced ACPI MRRM table parser go away (Dan Carpenter) - Fix ACPI table referece leak in error path of einj_probe() (Dan Carpenter)" * tag 'acpi-6.16-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPICA: Switch back to using strncpy() in acpi_ut_safe_strncpy() ACPI: MRRM: Silence error code static checker warning ACPI: APEI: EINJ: Clean up on error in einj_probe()
2025-05-30Merge branches 'acpica', 'acpi-tables' and 'acpi-apei'Rafael J. Wysocki
Merge fixes for issues introduced by recent ACPI changes merged previously: - Unbreak acpi_ut_safe_strncpy() by restoring its previous behavior changed incorrectly by a recent update (Ahmed Salem). - Make a new static checker warning in the recently introduced ACPI MRRM table parser go away (Dan Carpenter). - Fix ACPI table referece leak in error path of einj_probe() (Dan Carpenter). * acpica: ACPICA: Switch back to using strncpy() in acpi_ut_safe_strncpy() * acpi-tables: ACPI: MRRM: Silence error code static checker warning * acpi-apei: ACPI: APEI: EINJ: Clean up on error in einj_probe()
generated by cgit v1.2.3 (git 2.39.1) at 2026-09-20 21:14:47 +0000