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 7D8FE2FC2D0; Mon, 5 May 2025 22:25:56 +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=1746483956; cv=none; b=mD+YJUg1Eg+Ps+6A64Hnyx/00DKvStLtyORzEy5ae0UeE2by5LXoKgAjnYaZhtXpubCv4uq/95JUXF2fp1On/JaFet6/pTq+vqdRuUtX7LEga90IXdYrDvAg2AasRFEL4I9vZZjPa0PsVTUYP/QRzKcAdVlX+qL3fVA+g/m/0lE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746483956; c=relaxed/simple; bh=lA11mi3pVZ3Zgt4Qb1dPLIWEf000WMWrP3zmD8x6dCk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=dfRSCm6OIoR60jedTg9Gyqlul1jSHdX5EWkT9uZC0sqk6IvL2tJQAZ2E9gqk7GBcJMI6aY1WL7xYS95UpZA+sO9l2d0bw0kOw6JbIR++j0IouTOYbbSHWDT5owK3JORSSoH2ryWbQ56gYmO0OHZokpMvVW4WEJ6wg1VglLcsfL0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CSMkfTKe; 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="CSMkfTKe" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DAD45C4CEE4; Mon, 5 May 2025 22:25:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746483956; bh=lA11mi3pVZ3Zgt4Qb1dPLIWEf000WMWrP3zmD8x6dCk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CSMkfTKeCL/Ym0f0lRDWsCDqgm+BVhWCqQqWabxDbrIW3FQpvXrqNfABh5BiN8Oaa C4pfI8uQGyyAxCQcqO4MzCrAJjIYARmmoNyZPRzQMEqBXt6fg0M1zw+kQ8g8GUAC8r wnm4HHsFTf1R8yKX/xQM3+H5h8uB1r+74wKABORXJvcO+4EwlqQzxD+cY/Kmht4nYm 4ap05AtnbhCkWow4S1WjH5Glmeak6m9c9rr3wjlo2799plR8mg5A+e+y8T3VBq/Rjh CeuntQsGbywOXPkAwF6Ls28GRzrXVny9EbytwEJUug4X2W3PFGFUjimAynwIhKlkHi azzd1dS2kLQFg== 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 6.14 289/642] perf: arm_pmuv3: Call kvm_vcpu_pmu_resync_el0() before enabling counters Date: Mon, 5 May 2025 18:08:25 -0400 Message-Id: <20250505221419.2672473-289-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250505221419.2672473-1-sashal@kernel.org> References: <20250505221419.2672473-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.14.5 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 0e360feb3432e..9ebc950559c0a 100644 --- a/drivers/perf/arm_pmuv3.c +++ b/drivers/perf/arm_pmuv3.c @@ -825,10 +825,10 @@ 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