From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7E0CC43381 for ; Wed, 10 Mar 2021 11:41:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 821C764FD7 for ; Wed, 10 Mar 2021 11:41:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231952AbhCJLkq (ORCPT ); Wed, 10 Mar 2021 06:40:46 -0500 Received: from mail.kernel.org ([198.145.29.99]:53176 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229689AbhCJLkM (ORCPT ); Wed, 10 Mar 2021 06:40:12 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8F8CF64FE5; Wed, 10 Mar 2021 11:39:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1615376373; bh=xQ6SwjdUQv3ba3jHsYuK98gEzP7tGEoWw94EqmlnRM0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sm6vpbGqGs7qn9uy1gSaWNPAgj9OMrvjQELGunOM4QL6qrKm1Q0OpMjskfoFhKwQf 8avgwdLN68LLC1CFYZTVxK+I2FmO/Fk7Z+d+krVwVl2DXR54ti3QU4ZaxjPtjJ0waZ 7aJMh/RKK4jk+4HcaoxDb/75wYicYJSJrOUkfhn107gkCsXwIJb821XmTNqxa1suIp 9B4czlCw+XJ4T/hdMhS3tkKKIBpvT1RGJnPXynxh5MYakHCN6suXVdhmv01nQkewPP V/LanN7VBzfkkcK62U1GhcgPZcMohxOrvfdrsRsJrKH+3NWPPjx+NndzIQ6U40H2hj mUbhuJ99GWdhQ== From: Will Deacon To: Rob Herring , Mark Rutland Cc: catalin.marinas@arm.com, kernel-team@android.com, Will Deacon , linux-kernel@vger.kernel.org, Julien Thierry , Arnaldo Carvalho de Melo , Alexander Shishkin , Namhyung Kim , Peter Zijlstra , linux-arm-kernel@lists.infradead.org, Ingo Molnar , Jiri Olsa , Alexandru Elisei Subject: Re: [PATCH] arm64: perf: Fix 64-bit event counter read truncation Date: Wed, 10 Mar 2021 11:39:19 +0000 Message-Id: <161537450433.1678552.10313003900540512459.b4-ty@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210310004412.1450128-1-robh@kernel.org> References: <20210310004412.1450128-1-robh@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 9 Mar 2021 17:44:12 -0700, Rob Herring wrote: > Commit 0fdf1bb75953 ("arm64: perf: Avoid PMXEV* indirection") changed > armv8pmu_read_evcntr() to return a u32 instead of u64. The result is > silent truncation of the event counter when using 64-bit counters. Given > the offending commit appears to have passed thru several folks, it seems > likely this was a bad rebase after v8.5 PMU 64-bit counters landed. Applied to arm64 (for-next/fixes), thanks! [1/1] arm64: perf: Fix 64-bit event counter read truncation https://git.kernel.org/arm64/c/7bb8bc6eb550 Cheers, -- Will https://fixes.arm64.dev https://next.arm64.dev https://will.arm64.dev