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authorLinus Torvalds <torvalds@linux-foundation.org>2021-02-25 23:03:13 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-02-25 23:03:13 +0300
commit268f77b5250998b871fa54a2a9703871fb44544e (patch)
treecab619502cb6ccd99445a822067fb24afa256b9c /Documentation
parent6fbd6cf85a3be127454a1ad58525a3adcf8612ab (diff)
parentb11ffaeacd1984b1fca41374c769fb0ff0aa0a42 (diff)
downloadlinux-268f77b5250998b871fa54a2a9703871fb44544e.tar.xz
Merge tag 'acpi-5.12-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI updates from Rafael Wysocki: "These make additional changes to the platform profile interface merged recently and add support for the FPDT ACPI table. Specifics: - Rearrange Kconfig handling of ACPI_PLATFORM_PROFILE, add "balanced-performance" to the list of supported platform profiles and fix up some file references in a comment (Maximilian Luz). - Add support for parsing the ACPI Firmware Performance Data Table (FPDT) and exposing the data from there via sysfs (Zhang Rui)" * tag 'acpi-5.12-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI: platform: Add balanced-performance platform profile ACPI: platform: Fix file references in comment ACPI: platform: Hide ACPI_PLATFORM_PROFILE option ACPI: tables: introduce support for FPDT table
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/ABI/testing/sysfs-firmware-acpi43
-rw-r--r--Documentation/ABI/testing/sysfs-platform_profile18
2 files changed, 54 insertions, 7 deletions
diff --git a/Documentation/ABI/testing/sysfs-firmware-acpi b/Documentation/ABI/testing/sysfs-firmware-acpi
index b16d30a71709..819939d858c9 100644
--- a/Documentation/ABI/testing/sysfs-firmware-acpi
+++ b/Documentation/ABI/testing/sysfs-firmware-acpi
@@ -1,3 +1,46 @@
+What: /sys/firmware/acpi/fpdt/
+Date: Jan 2021
+Contact: Zhang Rui <rui.zhang@intel.com>
+Description:
+ ACPI Firmware Performance Data Table (FPDT) provides
+ information for firmware performance data for system boot,
+ S3 suspend and S3 resume. This sysfs entry contains the
+ performance data retrieved from the FPDT.
+
+ boot:
+ firmware_start_ns: Timer value logged at the beginning
+ of firmware image execution. In nanoseconds.
+ bootloader_load_ns: Timer value logged just prior to
+ loading the OS boot loader into memory.
+ In nanoseconds.
+ bootloader_launch_ns: Timer value logged just prior to
+ launching the currently loaded OS boot loader
+ image. In nanoseconds.
+ exitbootservice_start_ns: Timer value logged at the
+ point when the OS loader calls the
+ ExitBootServices function for UEFI compatible
+ firmware. In nanoseconds.
+ exitbootservice_end_ns: Timer value logged at the point
+ just prior to the OS loader gaining control
+ back from the ExitBootServices function for
+ UEFI compatible firmware. In nanoseconds.
+ suspend:
+ suspend_start_ns: Timer value recorded at the previous
+ OS write to SLP_TYP upon entry to S3. In
+ nanoseconds.
+ suspend_end_ns: Timer value recorded at the previous
+ firmware write to SLP_TYP used to trigger
+ hardware entry to S3. In nanoseconds.
+ resume:
+ resume_count: A count of the number of S3 resume cycles
+ since the last full boot sequence.
+ resume_avg_ns: Average timer value of all resume cycles
+ logged since the last full boot sequence,
+ including the most recent resume. In nanoseconds.
+ resume_prev_ns: Timer recorded at the end of the previous
+ platform runtime firmware S3 resume, just prior to
+ handoff to the OS waking vector. In nanoseconds.
+
What: /sys/firmware/acpi/bgrt/
Date: January 2012
Contact: Matthew Garrett <mjg@redhat.com>
diff --git a/Documentation/ABI/testing/sysfs-platform_profile b/Documentation/ABI/testing/sysfs-platform_profile
index 9d6b89b66cca..dae9c8941905 100644
--- a/Documentation/ABI/testing/sysfs-platform_profile
+++ b/Documentation/ABI/testing/sysfs-platform_profile
@@ -5,13 +5,17 @@ Description: This file contains a space-separated list of profiles supported for
Drivers must use the following standard profile-names:
- ============ ============================================
- low-power Low power consumption
- cool Cooler operation
- quiet Quieter operation
- balanced Balance between low power consumption and performance
- performance High performance operation
- ============ ============================================
+ ==================== ========================================
+ low-power Low power consumption
+ cool Cooler operation
+ quiet Quieter operation
+ balanced Balance between low power consumption
+ and performance
+ balanced-performance Balance between performance and low
+ power consumption with a slight bias
+ towards performance
+ performance High performance operation
+ ==================== ========================================
Userspace may expect drivers to offer more than one of these
standard profile names.