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linux/drivers/acpi
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Clément Léger 94e8c98846 ACPI: CPPC: Fix MASK_VAL() usage 
[ Upstream commit 60949b7b80 ]

MASK_VAL() was added as a way to handle bit_offset and bit_width for
registers located in system memory address space. However, while suited
for reading, it does not work for writing and result in corrupted
registers when writing values with bit_offset > 0. Moreover, when a
register is collocated with another one at the same address but with a
different mask, the current code results in the other registers being
overwritten with 0s. The write procedure for SYSTEM_MEMORY registers
should actually read the value, mask it, update it and write it with the
updated value. Moreover, since registers can be located in the same
word, we must take care of locking the access before doing it. We should
potentially use a global lock since we don't know in if register
addresses aren't shared with another _CPC package but better not
encourage vendors to do so. Assume that registers can use the same word
inside a _CPC package and thus, use a per _CPC package lock.

Fixes: 2f4a4d63a1 ("ACPI: CPPC: Use access_width over bit_width for system memory accesses")
Signed-off-by: Clément Léger <cleger@rivosinc.com>
Link: https://patch.msgid.link/20240826101648.95654-1-cleger@rivosinc.com
[ rjw: Dropped redundant semicolon ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-10-17 15:10:44 +02:00
..
acpica ACPICA: Revert "ACPICA: avoid Info: mapping multiple BARs. Your kernel is fine." 2024-07-05 09:14:33 +02:00
apei ACPI: APEI: set memory failure flags as MF_ACTION_REQUIRED on synchronous events 2024-02-23 08:54:38 +01:00
arm64 perf/smmuv3: Enable HiSilicon Erratum 162001900 quirk for HIP08/09 2023-09-23 11:09:55 +02:00
dptf ACPI: DPTF: Add new PCH FIVR methods 2021-08-04 18:08:50 +02:00
nfit ACPI: NFIT: fix a potential deadlock during NFIT teardown 2023-03-03 11:45:52 +01:00
numa ACPI: HMAT: Fix initiator registration for single-initiator systems 2022-12-08 11:28:45 +01:00
pmic ACPI: PMIC: Remove unneeded check in tps68470_pmic_opregion_probe() 2024-10-17 15:10:43 +02:00
x86 ACPI: x86: Force StorageD3Enable on more products 2024-07-05 09:14:39 +02:00
ac.c ACPI: AC: Quirk GK45 to skip reading _PSR 2021-11-18 19:16:19 +01:00
acpi_adxl.c ACPI/ADXL: Add address translation interface using an ACPI DSM 2018-10-16 10:03:00 +02:00
acpi_amba.c ACPI: AMBA: Fix resource name in /proc/iomem 2021-06-30 20:01:10 +02:00
acpi_apd.c serial: 8250_dw: Add device HID for new AMD UART controller 2021-05-13 17:08:42 +02:00
acpi_cmos_rtc.c ACPI: cmos_rtc: Using pr_fmt() and remove PREFIX 2021-06-07 15:36:45 +02:00
acpi_configfs.c ACPI: configfs: Make get_header() to return error pointer 2021-07-16 19:20:28 +02:00
acpi_dbg.c ACPI: debug: Remove the not used function 2020-11-17 18:12:34 +01:00
acpi_extlog.c ACPI: extlog: fix NULL pointer dereference check 2024-02-23 08:54:38 +01:00
acpi_fpdt.c ACPI: FPDT: properly handle invalid FPDT subtables 2023-11-28 16:56:29 +00:00
acpi_ipmi.c ACPI: ipmi: Remove address space handler in error path 2021-05-24 16:27:34 +02:00
acpi_lpat.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
acpi_lpit.c ACPI: LPIT: Avoid u32 multiplication overflow 2024-01-25 14:52:33 -08:00
acpi_lpss.c ACPI: LPSS: Fix the fractional clock divider flags 2024-01-25 14:52:34 -08:00
acpi_memhotplug.c ACPI: memhotplug: use a single static memory group for a single memory device 2021-09-08 11:50:23 -07:00
acpi_pad.c ACPI: processor: Replace deprecated CPU-hotplug functions 2021-08-04 20:25:54 +02:00
acpi_platform.c ACPI: platform: Remove ACPI_MODULE_NAME() 2020-09-25 18:25:51 +02:00
acpi_pnp.c ACPI: PNP: compare the string length in the matching_id() 2020-12-15 19:30:49 +01:00
acpi_processor.c ACPI: processor: Fix memory leaks in error paths of processor_add() 2024-09-12 11:07:52 +02:00
acpi_tad.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-01-22 16:17:19 +01:00
acpi_video.c ACPI: video: Add quirk for the Colorful X15 AT 23 Laptop 2024-02-23 08:54:38 +01:00
acpi_watchdog.c ACPI: watchdog: Replace open coded variant of resource_union() 2020-11-17 18:06:29 +01:00
battery.c ACPI: battery: create alarm sysfs attribute atomically 2024-08-19 05:45:37 +02:00
bgrt.c ACPI: bgrt: Use sysfs_emit 2021-06-23 19:27:50 +02:00
blacklist.c ACPI: blacklist: Unify the message printing 2021-06-07 15:36:45 +02:00
bus.c ACPI: bus: Avoid using CPPC if not supported by firmware 2024-10-17 15:10:44 +02:00
button.c ACPI: button: Add lid disable DMI quirk for Nextbook Ares 8A 2024-03-01 13:21:55 +01:00
container.c ACPI: container: Remove leftover ACPICA debug functionality 2020-09-25 18:25:51 +02:00
cppc_acpi.c ACPI: CPPC: Fix MASK_VAL() usage 2024-10-17 15:10:44 +02:00
custom_method.c ACPI: custom_method: fix a possible memory leak 2021-04-28 19:17:54 +02:00
debugfs.c ACPI: debugfs: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
device_pm.c for-5.14/drivers-2021-06-29 2021-06-30 12:21:16 -07:00
device_sysfs.c ACPI: sysfs: Fix create_pnp_modalias() and create_of_modalias() 2023-11-20 11:08:16 +01:00
dock.c ACPI: dock: fix some coding style issues 2021-04-08 16:27:03 +02:00
ec.c ACPI: EC: Avoid returning AE_OK on errors in address space handler 2024-07-27 10:46:07 +02:00
ec_sys.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 482 2019-06-19 17:09:52 +02:00
event.c Merge branches 'acpi-ec', 'acpi-apei', 'acpi-soc' and 'acpi-misc' 2021-06-29 15:51:25 +02:00
evged.c ACPI: GED: fix -Wformat 2020-11-09 19:25:20 +01:00
fan.c ACPI: PM / fan: Put fan device IDs into separate header file 2021-05-21 19:02:35 +02:00
fan.h ACPI: PM / fan: Put fan device IDs into separate header file 2021-05-21 19:02:35 +02:00
glue.c Revert "ACPI: scan: Release PM resources blocked by unused objects" 2021-11-21 13:44:14 +01:00
hed.c ACPI: HED: Drop unused ACPI_MODULE_NAME() definition 2021-03-08 16:51:48 +01:00
internal.h ACPI: EC: Rework flushing of EC work while suspended to idle 2022-01-27 11:03:23 +01:00
ioapic.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
irq.c ACPI: irq: Fix incorrect return value in acpi_register_gsi() 2023-10-25 11:59:02 +02:00
Kconfig Merge branches 'acpi-numa', 'acpi-glue', 'acpi-config' and 'acpi-pmic' 2021-08-30 19:30:37 +02:00
Makefile IOMMU Updates for Linux v5.14 2021-07-02 13:22:47 -07:00
nvs.c Merge branches 'acpi-ec', 'acpi-apei', 'acpi-soc' and 'acpi-misc' 2021-06-29 15:51:25 +02:00
osi.c ACPI: OSI: Shoot duplicate word 2019-11-13 11:12:08 +01:00
osl.c Revert "ACPI: Add memory semantics to acpi_os_map_memory()" 2021-09-23 20:39:36 +02:00
pci_irq.c ACPI: PCI: IRQ: Consolidate printing diagnostic messages 2021-03-08 16:51:08 +01:00
pci_link.c ACPI: utils: Introduce acpi_evaluation_failure_warn() 2021-03-08 19:10:30 +01:00
pci_mcfg.c PCI/ACPI: Guard ARM64-specific mcfg_quirks 2022-08-25 11:40:36 +02:00
pci_root.c ACPI: APEI: explicit init of HEST and GHES in apci_init() 2022-08-17 14:23:11 +02:00
pci_slot.c ACPI: PCI: Remove unused ACPICA debug code 2020-09-25 18:25:51 +02:00
platform_profile.c ACPI: platform-profile: call sysfs_notify() from platform_profile_store() 2021-08-16 18:32:02 +02:00
power.c ACPI: PM: Fix device wakeup power reference counting error 2021-11-18 19:17:09 +01:00
pptt.c ACPI: tables: PPTT: Populate cache-id if provided by firmware 2021-06-07 15:55:02 +02:00
prmt.c ACPI: PRM: Check whether EFI runtime is available 2023-01-24 07:22:45 +01:00
proc.c ACPI: proc: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
processor_core.c ACPI: processor: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
processor_driver.c ACPI: processor: Get rid of ACPICA message printing 2021-03-08 16:51:19 +01:00
processor_idle.c ACPI: processor_idle: Fix invalid comparison with insertion sort for latency 2024-07-27 10:46:06 +02:00
processor_pdc.c ACPI: processor: Fix evaluating _PDC method when running as Xen dom0 2023-05-11 23:00:22 +09:00
processor_perflib.c ACPI: processor: perflib: Avoid updating frequency QoS unnecessarily 2023-08-03 10:22:46 +02:00
processor_thermal.c ACPI: processor: Remove freq Qos request for all CPUs 2022-08-31 17:16:48 +02:00
processor_throttling.c Merge branches 'acpi-dptf' and 'acpi-messages' 2021-06-29 15:50:37 +02:00
property.c acpi: property: Let args be NULL in __acpi_node_get_property_reference 2024-03-01 13:21:52 +01:00
reboot.c ACPI: reboot: Unify the message printing 2021-06-07 15:36:46 +02:00
resource.c ACPI: resource: Do IRQ override on TongFang GXxHRXx and GMxHGxx 2024-06-16 13:39:55 +02:00
sbs.c ACPI: SBS: manage alarm sysfs attribute through psy core 2024-08-19 05:45:37 +02:00
sbshc.c Merge branches 'acpi-ec', 'acpi-apei', 'acpi-soc' and 'acpi-misc' 2021-06-29 15:51:25 +02:00
sbshc.h ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
scan.c ACPI: scan: Fix device check notification handling 2024-03-26 18:21:21 -04:00
sleep.c Revert "ACPI: PM: Block ASUS B1400CEAE from suspend to idle by default" 2024-04-13 13:01:45 +02:00
sleep.h Revert "Revert "ACPI: scan: Turn off unused power resources during initialization"" 2021-05-10 14:02:17 +02:00
spcr.c ACPI: SPCR: Add support for the new 16550-compatible Serial Port Subtype 2021-08-16 18:38:08 +02:00
sysfs.c ACPI: sysfs: Fix BERT error region memory mapping 2022-05-30 09:28:58 +02:00
tables.c memblock: exclude MEMBLOCK_NOMAP regions from kmemleak 2021-10-21 18:30:49 -10:00
thermal.c ACPI: thermal: Drop nocrt parameter 2023-09-02 09:17:07 +02:00
tiny-power-button.c ACPI: tiny-power-button: Simplify the code using module_acpi_driver() 2020-11-17 18:12:34 +01:00
utils.c ACPI: utils: Fix reference counting in for_each_acpi_dev_match() 2021-07-19 16:22:01 +02:00
video_detect.c ACPI: video: Add backlight=native quirk for Lenovo Slim 7 16ARH7 2024-07-05 09:14:26 +02:00
viot.c ACPI: VIOT: Initialize the correct IOMMU fwspec 2023-05-11 23:00:23 +09:00
wakeup.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00