From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AD23C2D37EF; Mon, 5 May 2025 22:47:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746485239; cv=none; b=junG3c7sNtGngr537OnS1kRE3vW3vPRCZAsG7WzdAoNre4L4kabX2xTji+H6a77E88/pVt3sg3ZLR7qwyEmp1WafbWv29ry1oracugpycRGnRvBPDr0o1r5SUc1oK+eHXyetW6k4mhHsz6AewXBOQZ6j4qXVMUW8pl+Uiel7BKM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746485239; c=relaxed/simple; bh=Q6mzvyxCFKn0LYzphUXFPUR4b1GinHCbmTPxZGgDFAI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=eGTZYkGCPO9n2Ba7CEwXemiwZFx4OYX8jGJGhSlnhZ9k9OfgSVhBfTeX70FLFqseo4BuNpKQLF3paJxZfX1HPLmoU64xXHY01yra8scQ3ck0kpKq+j9lT6yvtT3xO0D0CSKDHjX/w68ndahcHYGxEIN0e8YNKM/HOjiiCXHmD3o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=sFl7pGS3; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="sFl7pGS3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 706D3C4CEED; Mon, 5 May 2025 22:47:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746485238; bh=Q6mzvyxCFKn0LYzphUXFPUR4b1GinHCbmTPxZGgDFAI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sFl7pGS3Mp5yRD+wJVWyy5C9CQkpAiJMR1VWSc0LlOQ3TbIDRcGrETxSru5A2JRvf DB7ribZ42Nzyx4evfGdH9LGZzNm3USUiwQWz4LdDmOhLXE5B7DtXyW0yi0m6gRpHgv EulKpVDBs43q95u/uOR9Gr1Ioa0xwga1X0iWuKnKGOK1eh8fTYJusb+0AD3h076zoU LvU12QS7pKzvPPb2oGOmohpTrSM618oXGuxuKx4pI+ANdpCbWslheqyBHUO1RboLOr t/4MQ929kGsVxqbLjtdNRXtbji2aKTAPGJ2e7Junf+Gt1s94FW4/6dqYLudZv5orfV xGy5cl0/GdQew== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: "Rob Herring (Arm)" , Anshuman Khandual , James Clark , Will Deacon , Sasha Levin , mark.rutland@arm.com, linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org Subject: [PATCH AUTOSEL 6.12 228/486] perf: arm_pmuv3: Call kvm_vcpu_pmu_resync_el0() before enabling counters Date: Mon, 5 May 2025 18:35:04 -0400 Message-Id: <20250505223922.2682012-228-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250505223922.2682012-1-sashal@kernel.org> References: <20250505223922.2682012-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.12.26 Content-Transfer-Encoding: 8bit From: "Rob Herring (Arm)" [ Upstream commit 04bd15c4cbc3f7bd2399d1baab958c5e738dbfc9 ] Counting events related to setup of the PMU is not desired, but kvm_vcpu_pmu_resync_el0() is called just after the PMU counters have been enabled. Move the call to before enabling the counters. Signed-off-by: Rob Herring (Arm) Reviewed-by: Anshuman Khandual Tested-by: James Clark Link: https://lore.kernel.org/r/20250218-arm-brbe-v19-v20-1-4e9922fc2e8e@kernel.org Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- drivers/perf/arm_pmuv3.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/perf/arm_pmuv3.c b/drivers/perf/arm_pmuv3.c index 0afe02f879b45..d9b56f0f90942 100644 --- a/drivers/perf/arm_pmuv3.c +++ b/drivers/perf/arm_pmuv3.c @@ -816,10 +816,10 @@ static void armv8pmu_start(struct arm_pmu *cpu_pmu) else armv8pmu_disable_user_access(); + kvm_vcpu_pmu_resync_el0(); + /* Enable all counters */ armv8pmu_pmcr_write(armv8pmu_pmcr_read() | ARMV8_PMU_PMCR_E); - - kvm_vcpu_pmu_resync_el0(); } static void armv8pmu_stop(struct arm_pmu *cpu_pmu) -- 2.39.5