From c2465f95c4e73af1a6564b00ebc9acc15485edf0 Mon Sep 17 00:00:00 2001 From: Jeremy Linton Date: Wed, 9 Nov 2022 11:47:20 -0600 Subject: [PATCH] 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 Acked-by: Sudeep Holla Link: https://lore.kernel.org/r/20221109174720.203723-1-jeremy.linton@arm.com Signed-off-by: Will Deacon --- Documentation/arm64/acpi_object_usage.rst | 2 +- drivers/acpi/Kconfig | 2 +- 2 files changed, 2 insertions(+), 2 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") diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 473241b5193f..1cc11d2a2a88 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -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