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 149A12CCC0; Tue, 27 May 2025 16:58:14 +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=1748365094; cv=none; b=CqdtQmlASsH/5nBOh8owpK1KtKHzrG6rLdMVUsgXzmHuliuiUYc+2bk9k/zgOZUepP+HADCqkSAE1FOAOgw4awQtqSuVRqnWTvvBzCNUTzBOqpMLFYL92xKDkYpKm6tLu5RdjhRM2GhlZZHPvaeqU0eTN4lqIweX23r4S6izbcE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748365094; c=relaxed/simple; bh=FbWjWAnFYFFpUsgDpFXiTM5fmNkGWZxXgTtFEdJFQkQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=O0C7z4JKO0sjpzhX+E3m4s5Y5XI1lSakS3n5kozIQZdSBAQQA7bdjReFUQoOF6UIurOUNCJOyfFHiQTR9TNYOLTLWPK79uTZLUwMcHmm2jBq4FjuwDpktKZDsPn4aq8fB8VzsxknHK/+ClusZYGTmpOhhC2ToyJgebsHVnnttsM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=1SbcSwE8; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="1SbcSwE8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 88E34C4CEE9; Tue, 27 May 2025 16:58:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1748365093; bh=FbWjWAnFYFFpUsgDpFXiTM5fmNkGWZxXgTtFEdJFQkQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1SbcSwE8f9NPapqJRCknexbL4KK2nGRcnO6HLTfKwCBvCUuRCPBx4W3m3l19oRmqj cLFnNB5PZ4RjW/z0VMsNc551IlyuAOnBBFTFYuElcMd9HDWRtYfigcLzPRy3jeDFtm vUUJAUIx3bLi1KR/VOlyl56wI/QQCYIy9Nrg1utU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Rob Herring (Arm)" , Anshuman Khandual , James Clark , Will Deacon , Sasha Levin Subject: [PATCH 6.12 264/626] perf: arm_pmuv3: Call kvm_vcpu_pmu_resync_el0() before enabling counters Date: Tue, 27 May 2025 18:22:37 +0200 Message-ID: <20250527162455.734184681@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250527162445.028718347@linuxfoundation.org> References: <20250527162445.028718347@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ 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