From patchwork Wed Nov 9 17:47:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeremy Linton X-Patchwork-Id: 13037833 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 11598C433FE for ; Wed, 9 Nov 2022 17:48:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231960AbiKIRsC (ORCPT ); Wed, 9 Nov 2022 12:48:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59018 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231322AbiKIRrr (ORCPT ); Wed, 9 Nov 2022 12:47:47 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 9D445E70; Wed, 9 Nov 2022 09:47:32 -0800 (PST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 98B911FB; Wed, 9 Nov 2022 09:47:36 -0800 (PST) Received: from u200856.usa.arm.com (U203867.austin.arm.com [10.118.30.40]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C25BD3F703; Wed, 9 Nov 2022 09:47:26 -0800 (PST) From: Jeremy Linton 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 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> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org 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 --- 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