From nobody Mon Feb 9 19:04:54 2026 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 DBB1B53AC; Mon, 3 Feb 2025 00:43:18 +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=1738543399; cv=none; b=FO2pZbf/lfhVhIZtsLWJOxmUCKXzyZngSmvC62SZ0n3h09YD7WLmshBNrRyY45QlqS4FSyhTFNyA6yMiv6d4uqFFWR1DB49ITr0TQZZi1VMonwQNHgDanlly23qqg3VUIZJr8jN0JkuwXNQLxBnKxjlUl+8H+86qJqQPvslrs/w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738543399; c=relaxed/simple; bh=V8wrbmv6+iU82R3xdPrcgfmHhCpNAQtvlPJUttOpxTs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=oVd8RUGXhU+fKViiINsbJWf1r755YfMWCyQtXYdG1KNCuig0K2XStP19b22b9HuLaezyqyYSc/Sdi/xYlol79oYm29fcdN+JNnPZPfI9Wyzsc6oeEPIH7qYC6lExsAlaP9nbaZKPMuTJLAr6JqnFYGh4UrI2aaru4zIYNZabb2Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=RkUzq0+s; 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="RkUzq0+s" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 13A62C4CED2; Mon, 3 Feb 2025 00:43:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1738543398; bh=V8wrbmv6+iU82R3xdPrcgfmHhCpNAQtvlPJUttOpxTs=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=RkUzq0+shuRFTcI2VpNYT4svHSo2rOdw8L1hZKiMwZcgKwXfeZzpJGGWA140p0oP8 MS+rKCcRRYqVeg2+xjXlyIYJ4KhVIehW6Y3TbcBB14GLPJQsWncO1lrvqhh8B+IbdK hPMILjYi/BosJtzaiHuNGQBmbIbQi16fWsQplDYZaZ8yeBtQ/z5fkctxVxkDLUusrK UKX6wf7OV/7pZ+7QAX1rBrkXL4dbTd6CT/y0C1W+2XWn9sDPU5Gy5cv4JdvBl+m7am qqVeoW+7g0T1uLg6lDNOL/HI9075HZQUepvXEVU4w6oCAFteqO3MtijLXXFtQ6w1rQ Yl3UqCd20c7Yw== From: "Rob Herring (Arm)" Date: Sun, 02 Feb 2025 18:42:55 -0600 Subject: [PATCH v19 01/11] perf: arm_pmuv3: Call kvm_vcpu_pmu_resync_el0() before enabling counters Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250202-arm-brbe-v19-v19-1-1c1300802385@kernel.org> References: <20250202-arm-brbe-v19-v19-0-1c1300802385@kernel.org> In-Reply-To: <20250202-arm-brbe-v19-v19-0-1c1300802385@kernel.org> To: Will Deacon , Mark Rutland , Catalin Marinas , Jonathan Corbet , Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , James Clark , Anshuman Khandual Cc: linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, kvmarm@lists.linux.dev X-Mailer: b4 0.15-dev 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 --- 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 0e360feb3432..9ebc950559c0 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(); =20 + kvm_vcpu_pmu_resync_el0(); + /* Enable all counters */ armv8pmu_pmcr_write(armv8pmu_pmcr_read() | ARMV8_PMU_PMCR_E); - - kvm_vcpu_pmu_resync_el0(); } =20 static void armv8pmu_stop(struct arm_pmu *cpu_pmu) --=20 2.47.2