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| author |  Jeremy Linton <jeremy.linton@arm.com>
| 2022-11-09 11:47:20 -0600 |
|---|---|---|
| committer |  Will Deacon <will@kernel.org>
| 2022-11-14 18:02:59 +0000 |
| commit | c2465f95c4e73af1a6564b00ebc9acc15485edf0 (patch) | |
| tree | 926b34683c3dfb1ca1f8d3f34a49502ed22096df /Documentation/arm64 | |
| parent | arm_pmu: acpi: handle allocation failure (diff) | |
| download | linux-c2465f95c4e73af1a6564b00ebc9acc15485edf0.tar.gz linux-c2465f95c4e73af1a6564b00ebc9acc15485edf0.tar.bz2 linux-c2465f95c4e73af1a6564b00ebc9acc15485edf0.zip | |
ACPI: Enable FPDT on arm64
FPDT provides some boot timing records useful for analyzing
parts of the UEFI boot stack. Given the existing code works
on arm64, and allows reading the values without utilizing
/dev/mem it seems like a good idea to turn it on.
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20221109174720.203723-1-jeremy.linton@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'Documentation/arm64')
| -rw-r--r-- | Documentation/arm64/acpi_object_usage.rst | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/arm64/acpi_object_usage.rst b/Documentation/arm64/acpi_object_usage.rst index 0609da73970b..484ef9676653 100644 --- a/Documentation/arm64/acpi_object_usage.rst +++ b/Documentation/arm64/acpi_object_usage.rst @@ -163,7 +163,7 @@ FPDT Section 5.2.23 (signature == "FPDT") **Firmware Performance Data Table** - Optional, not currently supported. + Optional, useful for boot performance profiling. GTDT Section 5.2.24 (signature == "GTDT") |