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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4F1C9C3ABBE for ; Tue, 6 May 2025 01:39:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ISdSg1Rm1wj3ZHTskC+ANqIQb46tilpU2eTv6SfrJFI=; b=rtx7Ne+gpssz5kDbUtmyGvi4tb u70hIHPUYRK+dRP5BX0c7or+/4oy/KVyRx1sLmfZ7OX4+WckIbaTbLIFrA/yyF8x8mY7UYJetqwsj FEJ98x/5CP1Ko1kXZU2BcgM3hGiYExJ5FGe/A5kxpCpZ8qY10+83iJfhnwtfFfgavnL3sIDjF9M/D hIdx2e9xiOchbgn3DHn4ngV9cBCOSn4pFi7NgggpVJrbkL2zRH9mLN/wumOwUZkcDYeT9ngMe4Jk/ YaR4Obc4Ep3QK5ouleNENUHmdfrgbSzWrH9UXMiuFPC2ZsUfmvyONmb2F5kZp0oY5ladM7JVZ90RU yMDx5qSw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uC7H9-00000009Ymp-3ND5; Tue, 06 May 2025 01:39:15 +0000 Received: from nyc.source.kernel.org ([147.75.193.91]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uC4al-00000008rVK-2QGY for linux-arm-kernel@lists.infradead.org; Mon, 05 May 2025 22:47:21 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 4308EA4CF97; Mon, 5 May 2025 22:41:51 +0000 (UTC) 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> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.12.26 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250505_154719_681910_75A7F3AF X-CRM114-Status: GOOD ( 10.87 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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