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From:   Jeremy Linton <jeremy.linton@arm.com>
To:     linux-acpi@vger.kernel.org
Cc:     catalin.marinas@arm.com, will@kernel.org, corbet@lwn.net,
        rafael@kernel.org, lenb@kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org, Jeremy Linton <jeremy.linton@arm.com>
Subject: [PATCH] ACPI: Enable FPDT on arm64
Date:   Wed,  9 Nov 2022 11:47:20 -0600
Message-Id: <20221109174720.203723-1-jeremy.linton@arm.com>
MIME-Version: 1.0
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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>
---
 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
-- 
2.38.1