Commit 8fa0db3a authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'acpi-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm 

Pull ACPI updates from Rafael Wysocki:
 "These rework the handling of ACPI device objects to use the driver
  core facilities for managing child ones instead of some questionable
  home-grown ways without the requisite locking and reference counting,
  clean up the EC driver, improve suspend-to-idle handling on x86, add
  some systems to the ACPI backlight quirk list, fix some assorted
  issues, clean up code and improve documentation.

  Specifics:

   - Use facilities provided by the driver core and some additional
     helpers to handle the children of a given ACPI device object in
     multiple places instead of using the children and node list heads
     in struct acpi_device which is error prone (Rafael Wysocki).

   - Fix ACPI-related device reference counting issue in the hisi_lpc
     bus driver (Yang Yingliang).

   - Drop the children and node list heads that are not needed any more
     from struct acpi_device (Rafael Wysocki).

   - Drop driver member from struct acpi_device (Uwe Kleine-König).

   - Drop redundant check from acpi_device_remove() (Uwe Kleine-König).

   - Prepare the CPPC library for handling backwards-compatible future
     _CPC return package formats gracefully (Rafael Wysocki).

   - Clean up the ACPI EC driver after previous changes in it (Hans de
     Goede).

   - Drop leftover acpi_processor_get_limit_info() declaration (Riwen
     Lu).

   - Split out thermal initialization from ACPI PSS (Riwen Lu).

   - Annotate more functions in the ACPI CPU idle driver to live in the
     cpuidle section (Guilherme G. Piccoli).

   - Fix _EINJ vs "special purpose" EFI memory regions (Dan Williams).

   - Implement a better fix to avoid spamming the console with old error
     logs (Tony Luck).

   - Fix typo in a comment in the APEI code (Xiang wangx).

   - Save NVS memory during transitions into S3 on Lenovo G40-45 (Manyi
     Li).

   - Add support for upcoming AMD uPEP device ID AMDI008 to the ACPI
     suspend-to-idle driver for x86 platforms (Shyam Sundar S K).

   - Clean up checks related to the ACPI_FADT_LOW_POWER_S0 platform flag
     in the LPIT table driver and the suspend-to-idle driver for x86
     platforms (Rafael Wysocki).

   - Print information messages regarding declared LPS0 idle support in
     the platform firmware (Rafael Wysocki).

   - Fix missing check in register_device_clock() in the ACPI driver for
     Intel SoCs (huhai).

   - Fix ACS setup in the VIOT table parser (Eric Auger).

   - Skip IRQ override on AMD Zen platforms where it's harmful
     (Chuanhong Guo).

   - Use native backlight on Dell Inspiron N4010 (Hans de Goede).

   - Use native backlight on some TongFang devices (Werner Sembach).

   - Drop X86 dependency from the ACPI backlight driver Kconfig (Riwen
     Lu).

   - Shorten the quirk list in the ACPI backlight driver by identifying
     Clevo by board_name only (Werner Sembach).

   - Remove useless NULL pointer checks from 2 ACPI PCI link management
     functions (Andrey Strachuk).

   - Fix obsolete example in the ACPI EINJ documentation (Qifu Zhang).

   - Update links and references to _DSD-related documents (Sudeep
     Holla)"

* tag 'acpi-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (46 commits)
  ACPI/PCI: Remove useless NULL pointer checks
  ACPI: CPPC: Do not prevent CPPC from working in the future
  ACPI: PM: x86: Print messages regarding LPS0 idle support
  ACPI: resource: skip IRQ override on AMD Zen platforms
  Documentation: ACPI: EINJ: Fix obsolete example
  ACPI: video: Use native backlight on Dell Inspiron N4010
  ACPI: PM: s2idle: Use LPS0 idle if ACPI_FADT_LOW_POWER_S0 is unset
  Revert "ACPI / PM: LPIT: Register sysfs attributes based on FADT"
  ACPI: video: Shortening quirk list by identifying Clevo by board_name only
  ACPI: video: Force backlight native for some TongFang devices
  ACPI: PM: s2idle: Add support for upcoming AMD uPEP HID AMDI008
  ACPI: VIOT: Fix ACS setup
  ACPI: bus: Drop unused list heads from struct acpi_device
  hisi_lpc: Use acpi_dev_for_each_child()
  bus: hisi_lpc: fix missing platform_device_put() in hisi_lpc_acpi_probe()
  ACPI: bus: Drop driver member of struct acpi_device
  ACPI: bus: Drop redundant check in acpi_device_remove()
  ACPI: APEI: Fix _EINJ vs EFI_MEMORY_SP
  ACPI: LPSS: Fix missing check in register_device_clock()
  ACPI: APEI: Better fix to avoid spamming the console with old error logs
  ...
parents 64ae88ff 6352f347

Documentation/firmware-guide/acpi/DSD-properties-rules.rst

+7 −4
Original line number Diff line number Diff line
@@ -21,7 +21,9 @@ specific type) associated with it. 


In the ACPI _DSD context it is an element of the sub-package following the

generic Device Properties UUID in the _DSD return package as specified in the

Device Properties UUID definition document [1]_.

section titled "Well-Known _DSD UUIDs and Data Structure Formats" sub-section

"Device Properties UUID" in _DSD (Device Specific Data) Implementation Guide

document [1]_.



It also may be regarded as the definition of a key and the associated data type

that can be returned by _DSD in the Device Properties UUID sub-package for a
@@ -36,7 +38,9 @@ Property subsets are nested collections of properties. Each of them is 
associated with an additional key (name) allowing the subset to be referred

to as a whole (and to be treated as a separate entity).  The canonical

representation of property subsets is via the mechanism specified in the

Hierarchical Properties Extension UUID definition document [2]_.

section titled "Well-Known _DSD UUIDs and Data Structure Formats" sub-section

"Hierarchical Data Extension UUID" in _DSD (Device Specific Data)

Implementation Guide document [1]_.



Property sets may be hierarchical.  That is, a property set may contain

multiple property subsets that each may contain property subsets of its
@@ -96,5 +100,4 @@ contents. 
References

==========



.. [1] https://www.uefi.org/sites/default/files/resources/_DSD-device-properties-UUID.pdf

.. [2] https://www.uefi.org/sites/default/files/resources/_DSD-hierarchical-data-extension-UUID-v1.1.pdf
 
.. [1] https://github.com/UEFI/DSD-Guide

Documentation/firmware-guide/acpi/apei/einj.rst

+1 −1
Original line number Diff line number Diff line
@@ -168,7 +168,7 @@ An error injection example:: 
  0x00000008	Memory Correctable

  0x00000010	Memory Uncorrectable non-fatal

  # echo 0x12345000 > param1		# Set memory address for injection

  # echo $((-1 << 12)) > param2		# Mask 0xfffffffffffff000 - anywhere in this page

  # echo 0xfffffffffffff000 > param2		# Mask - anywhere in this page

  # echo 0x8 > error_type			# Choose correctable memory error

  # echo 1 > error_inject			# Inject now

drivers/acpi/Kconfig

+2 −2
Original line number Diff line number Diff line
@@ -210,7 +210,7 @@ config ACPI_TINY_POWER_BUTTON_SIGNAL 


config ACPI_VIDEO

	tristate "Video"

	depends on X86 && BACKLIGHT_CLASS_DEVICE

	depends on BACKLIGHT_CLASS_DEVICE

	depends on INPUT

	select THERMAL

	help
@@ -255,7 +255,6 @@ config ACPI_DOCK 


config ACPI_CPU_FREQ_PSS

	bool

	select THERMAL



config ACPI_PROCESSOR_CSTATE

	def_bool y
@@ -287,6 +286,7 @@ config ACPI_PROCESSOR 
	depends on X86 || IA64 || ARM64 || LOONGARCH

	select ACPI_PROCESSOR_IDLE

	select ACPI_CPU_FREQ_PSS if X86 || IA64 || LOONGARCH

	select THERMAL

	default y

	help

	  This driver adds support for the ACPI Processor package. It is required

drivers/acpi/Makefile

+2 −3
Original line number Diff line number Diff line
@@ -109,10 +109,9 @@ obj-$(CONFIG_ACPI_PPTT) += pptt.o 
obj-$(CONFIG_ACPI_PFRUT)	+= pfr_update.o pfr_telemetry.o



# processor has its own "processor." module_param namespace

processor-y			:= processor_driver.o

processor-y			:= processor_driver.o processor_thermal.o

processor-$(CONFIG_ACPI_PROCESSOR_IDLE) += processor_idle.o

processor-$(CONFIG_ACPI_CPU_FREQ_PSS)	+= processor_throttling.o	\

	processor_thermal.o

processor-$(CONFIG_ACPI_CPU_FREQ_PSS)	+= processor_throttling.o

processor-$(CONFIG_CPU_FREQ)	+= processor_perflib.o



obj-$(CONFIG_ACPI_PROCESSOR_AGGREGATOR) += acpi_pad.o

drivers/acpi/acpi_lpit.c

+0 −6
Original line number Diff line number Diff line
@@ -109,17 +109,11 @@ static void lpit_update_residency(struct lpit_residency_info *info, 
		if (!info->iomem_addr)

			return;



		if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0))

			return;



		/* Silently fail, if cpuidle attribute group is not present */

		sysfs_add_file_to_group(&cpu_subsys.dev_root->kobj,

					&dev_attr_low_power_idle_system_residency_us.attr,

					"cpuidle");

	} else if (info->gaddr.space_id == ACPI_ADR_SPACE_FIXED_HARDWARE) {

		if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0))

			return;



		/* Silently fail, if cpuidle attribute group is not present */

		sysfs_add_file_to_group(&cpu_subsys.dev_root->kobj,

					&dev_attr_low_power_idle_cpu_residency_us.attr,