diff options
| author | Rafael J. Wysocki | 2021-02-25 18:57:40 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki | 2021-02-25 18:57:40 +0100 |
| commit | b11ffaeacd1984b1fca41374c769fb0ff0aa0a42 (patch) | |
| tree | 16856805159d1a4ebe3f06dbb03f7e7e782d2de3 /Documentation | |
| parent | 6c0b5e3fc6b536b125a66dfee103f3bc26d386f6 (diff) | |
| parent | d1eb86e59be09c12447fcb959783cbc70a9bec01 (diff) | |
Merge branch 'acpi-tables'
* acpi-tables:
ACPI: tables: introduce support for FPDT table
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-firmware-acpi | 43 |
1 files changed, 43 insertions, 0 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> |