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Mario Limonciello 5d131318bb ACPI: processor idle: Check for architectural support for LPI 
commit eb087f3059 upstream.

When `osc_pc_lpi_support_confirmed` is set through `_OSC` and `_LPI` is
populated then the cpuidle driver assumes that LPI is fully functional.

However currently the kernel only provides architectural support for LPI
on ARM.  This leads to high power consumption on X86 platforms that
otherwise try to enable LPI.

So probe whether or not LPI support is implemented before enabling LPI in
the kernel.  This is done by overloading `acpi_processor_ffh_lpi_probe` to
check whether it returns `-EOPNOTSUPP`. It also means that all future
implementations of `acpi_processor_ffh_lpi_probe` will need to follow
these semantics as well.

Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-20 09:23:09 +02:00
..
acpica ACPICA: Avoid walking the ACPI Namespace if it is not there 2022-04-08 14:40:31 +02:00
apei ACPI/APEI: Limit printable size of BERT table data 2022-04-08 14:40:32 +02:00
arm64 ACPI/IORT: Check node revision for PMCG resources 2022-02-16 12:54:22 +01:00
dptf ACPI: DPTF: Fix reading of attributes 2021-08-04 12:46:39 +02:00
nfit ACPI: NFIT: Use fallback node id when numa info in NFIT table is incorrect 2021-10-06 15:55:46 +02:00
numa treewide: Change list_sort to use const pointers 2021-09-30 10:11:04 +02:00
pmic ACPI: PMIC: Fix intel_pmic_regs_handler() read accesses 2021-11-18 14:04:26 +01:00
x86 ACPI / x86: Add not-present quirk for the PCI0.SDHB.BRC1 device on the GPD win 2022-01-27 10:54:13 +01:00
ac.c ACPI: AC: Quirk GK45 to skip reading _PSR 2021-11-18 14:04:00 +01:00
acpi_adxl.c
acpi_amba.c ACPI: AMBA: Fix resource name in /proc/iomem 2021-07-20 16:05:49 +02:00
acpi_apd.c serial: 8250_dw: Add device HID for new AMD UART controller 2021-06-03 09:00:33 +02:00
acpi_cmos_rtc.c ACPI: cmos_rtc: Remove leftover ACPI_MODULE_NAME() 2020-09-25 18:25:51 +02:00
acpi_configfs.c ACPI: configfs: add missing check after configfs_register_default_group() 2021-03-04 11:38:22 +01:00
acpi_dbg.c ACPI: debug: don't allow debugging when ACPI is disabled 2020-10-16 17:58:52 +02:00
acpi_extlog.c ACPI / extlog: Check for RDMSR failure 2020-10-02 19:01:55 +02:00
acpi_ipmi.c
acpi_lpat.c
acpi_lpit.c ACPI: LPIT: Put the low power idle table after using it 2020-05-09 11:29:16 +02:00
acpi_lpss.c drm next for 5.10-rc1 2020-10-15 10:46:16 -07:00
acpi_memhotplug.c mm/memory_hotplug: prepare passing flags to add_memory() and friends 2020-10-16 11:11:18 -07:00
acpi_pad.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-07-14 16:56:12 +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() 2020-12-30 11:54:06 +01:00
acpi_processor.c ACPI: processor: remove comment regarding string _UID support 2020-10-16 18:11:27 +02:00
acpi_tad.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-07-14 16:56:12 +02:00
acpi_video.c ACPI: video: Add quirk for the Dell Vostro 3350 2021-07-20 16:05:49 +02:00
acpi_watchdog.c ACPI: watchdog: Put the watchdog action table after parsing 2020-05-09 11:29:17 +02:00
battery.c ACPI: battery: Add device HID and quirk for Microsoft Surface Go 3 2022-03-28 09:57:10 +02:00
bgrt.c ACPI: bgrt: Fix CFI violation 2021-07-14 16:56:12 +02:00
blacklist.c
bus.c ACPI: Change acpi_device_always_present() into acpi_device_override_status() 2022-01-27 10:54:13 +01:00
button.c ACPI: button: Add DMI quirk for Medion Akoya E2228T 2020-11-09 19:29:41 +01:00
container.c ACPI: container: Remove leftover ACPICA debug functionality 2020-09-25 18:25:51 +02:00
cppc_acpi.c ACPI: CPPC: Avoid out of bounds access when parsing _CPC data 2022-04-08 14:40:42 +02:00
custom_method.c ACPI: custom_method: fix a possible memory leak 2021-05-11 14:47:12 +02:00
debugfs.c ACPI: debugfs: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
device_pm.c ACPI: PM / fan: Put fan device IDs into separate header file 2021-07-14 16:56:11 +02:00
device_sysfs.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-07-14 16:56:12 +02:00
dock.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-07-14 16:56:12 +02:00
ec.c Revert "ACPI: PM: s2idle: Cancel wakeup before dispatching EC GPE" 2022-03-11 12:11:55 +01:00
ec_sys.c
event.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
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 2021-07-14 16:56:11 +02:00
fan.h ACPI: PM / fan: Put fan device IDs into separate header file 2021-07-14 16:56:11 +02:00
glue.c
hed.c
internal.h ACPI: EC: Rework flushing of EC work while suspended to idle 2022-01-27 10:53:52 +01:00
ioapic.c
irq.c
Kconfig ACPI: Kconfig: Fix table override from built-in initrd 2021-07-28 14:35:39 +02:00
Makefile ACPI: tables: Add custom DSDT file as makefile prerequisite 2021-07-14 16:56:01 +02:00
nvs.c
osi.c
osl.c ACPI: OSL: Make ACPICA use logical addresses of GPE blocks 2020-09-11 16:45:00 +02:00
pci_irq.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
pci_link.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
pci_mcfg.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
pci_root.c Merge branches 'acpi-extlog', 'acpi-memhotplug', 'acpi-button', 'acpi-tools' and 'acpi-pci' 2020-10-13 14:45:36 +02:00
pci_slot.c ACPI: PCI: Remove unused ACPICA debug code 2020-09-25 18:25:51 +02:00
power.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-07-14 16:56:12 +02:00
pptt.c
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
processor_idle.c ACPI: processor idle: Check for architectural support for LPI 2022-04-20 09:23:09 +02:00
processor_pdc.c
processor_perflib.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
processor_thermal.c ACPI: processor: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
processor_throttling.c x86: ACPI: fix CPU hotplug deadlock 2020-04-04 16:28:24 +02:00
property.c ACPI: properties: Consistently return -ENOENT if there are no more references 2022-04-08 14:39:55 +02:00
reboot.c ACPI: reboot: Avoid racing after writing to ACPI RESET_REG 2020-10-16 18:04:52 +02:00
resource.c Revert "ACPI: resources: Add checks for ACPI IRQ override" 2021-08-04 12:46:39 +02:00
sbs.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
sbshc.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
sbshc.h ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
scan.c ACPI: scan: Create platform device for BCM4752 and LNV4752 ACPI nodes 2022-01-27 10:54:00 +01:00
sleep.c Revert "ACPI: PM: s2idle: Cancel wakeup before dispatching EC GPE" 2022-03-11 12:11:55 +01:00
sleep.h ACPI: PM: Add acpi_[un]register_wakeup_handler() 2020-04-04 19:45:18 +02:00
spcr.c ACPI: Use fallthrough pseudo-keyword 2020-07-09 14:09:28 +02:00
sysfs.c Merge back sysfs-related ACPI material for v5.9. 2020-06-29 13:49:49 +02:00
tables.c ACPI: tables: x86: Reserve memory occupied by ACPI tables 2021-04-07 15:00:08 +02:00
thermal.c ACPI: thermal: Do not call acpi_thermal_check() directly 2021-02-03 23:28:37 +01:00
tiny-power-button.c ACPI: tiny-power-button: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
utils.c ACPI: utils: remove unreachable breaks 2020-10-22 18:58:26 +02:00
video_detect.c ACPI: video: Force backlight native for Clevo NL5xRU and NL5xNU 2022-03-28 09:57:10 +02:00
wakeup.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00