Commit c2465f95 authored Nov 09, 2022 by Jeremy Linton Committed by Will Deacon Nov 14, 2022

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>

parent a8731264

Documentation/arm64/acpi_object_usage.rst

+1 −1

Original line number	Diff line number	Diff line
		@@ -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")

drivers/acpi/Kconfig

+1 −1

Original line number	Diff line number	Diff line
		@@ -90,7 +90,7 @@ config ACPI_SPCR_TABLE

		config ACPI_FPDT
		bool "ACPI Firmware Performance Data Table (FPDT) support"
		depends on X86_64
		depends on X86_64 \|\| ARM64
		help
		Enable support for the Firmware Performance Data Table (FPDT).
		This table provides information on the timing of the system