From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f73.google.com (mail-oa1-f73.google.com [209.85.160.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9A9FB3EF674 for ; Mon, 4 May 2026 21:18:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777929518; cv=none; b=R/FU+eOMFFmEp4O85jF8VYZwFvVB9LOTmAHsNOH3EeCDGqnz9HX2ysCQOUZQhfEaE0rcmIoAR49ayOigUH4exIKlskRU1ExV/HBjt93grD6olOq/e8i3ZYOoXwXjdXll1NqNCmGOLZSvnLZ/PVPess1NT/zZpniN8D8K0O5vZUI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777929518; c=relaxed/simple; bh=Kt0JxjDXw64yyFAEbn3FTtOy6aQbbH4PD8HMmdQ27Kc=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=QYavhy0JJm0pvuMQkMuSf82aGLnf2VcUIQpmTEx+ZKIvEuxBvWwu9Eh0+uUjEP/L0haA3YD9C6fdCV+PBHb5WGyv4Zyw/UdGVGkeN9YX/bMWG7y1BUnXbZ5586N6U/kTQZPQf2yh2p17VJ7iJLpHkmR4lXKk6namCGpTlQZxQXQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--coltonlewis.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=HlhMW9VE; arc=none smtp.client-ip=209.85.160.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--coltonlewis.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="HlhMW9VE" Received: by mail-oa1-f73.google.com with SMTP id 586e51a60fabf-42c125431f7so9248742fac.3 for ; Mon, 04 May 2026 14:18:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1777929514; x=1778534314; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=zpZCDOiFD5ADpp1wKWAJRO360JAEeKFaw0Z2nRZPnRE=; b=HlhMW9VE0NFY70PhISGn17Oofl80Z56pJcbBKpIluqSVljhaZ8buUUJO9fzngWsVdL Fy+ZafFrc0cZFRXAvUMSfROgONzy9Nnd6OZmVBN4PIAw6cUdb3yPkcjc364kUKimMp7M RWp0ahV1XdNXjbmIU1+DALrzRCBW3eiMpfsjzd1gNNZmcWCyQyu5Iu0AXnAOnf4V5W2h Vnz3U95GVyzS0bSiEL+zNk71PrescclXwHhvqe5PRchMLvr5mFxPcvhcplqcSFF9e9y7 iGjcPAW+flEX1gE79anaXR2MLqwoSOvp86M8He78uA13Aw31nspLJOoYx4mjNMnfQnkH 3/ag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777929514; x=1778534314; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=zpZCDOiFD5ADpp1wKWAJRO360JAEeKFaw0Z2nRZPnRE=; b=Rw52ToDi3Y5BWKJXpdFDb0FvitlE7vMXisqHaiAEF4E34OeKnipKpKWJ81EfDuPHRe InWZukyX6d9qBqvLE3snN253w2HoS7ye77meMSLWCi3L5hbRiyc4AkN5l/Af/tvvuyxX hWncCrpOmZpMyBjfal3/OrtHcS1c5mgK7K6iyOE8hkQ71fLiOqS4ycmtmJ3qFCHMT3o7 YeeWTaTEaZX1ZDGdIs0CmqrJnTgvYyoIH2KSXuA5LRWOZcfCq7S5jdTTZgoZfOlMX5ZJ qper9k36+yLqoRBZXR+Uwu9lKADfPo9U1odkLIys5ZxSKOj+hcvDNsTfROt6d27ig1jW bTTA== X-Forwarded-Encrypted: i=1; AFNElJ+PdkcM+1YJaVEhcXfvASciP3MyKjV43UY5qFhY6PmbO4VfNZJUO2OCGW9wpCO1HJt6NL1+LFG1NRE=@vger.kernel.org X-Gm-Message-State: AOJu0YxfUtslRtxqHLcqkuhi0gVw/yTfwZSVKw45VB3BCSPkmp+RMIeh mBHC1ulcWFBiNIiKQt1VqQaJyaeBTGHCpymGjhQfKyVXZeitQH7vH5YElBgHQ1aD1PiVw/0X0s6 Cr62P4XG5+BWV2fQCz8hnIFT5Nw== X-Received: from ilqa6.prod.google.com ([2002:a05:6e02:1206:b0:4fa:1fcf:cad3]) (user=coltonlewis job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6820:99b:b0:694:8bfa:7817 with SMTP id 006d021491bc7-69697db8330mr6011884eaf.53.1777929514318; Mon, 04 May 2026 14:18:34 -0700 (PDT) Date: Mon, 4 May 2026 21:17:58 +0000 In-Reply-To: <20260504211813.1804997-1-coltonlewis@google.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260504211813.1804997-1-coltonlewis@google.com> X-Mailer: git-send-email 2.54.0.545.g6539524ca2-goog Message-ID: <20260504211813.1804997-6-coltonlewis@google.com> Subject: [PATCH v7 05/20] perf: arm_pmuv3: Check cntr_mask before using pmccntr From: Colton Lewis To: kvm@vger.kernel.org Cc: Alexandru Elisei , Paolo Bonzini , Jonathan Corbet , Russell King , Catalin Marinas , Will Deacon , Marc Zyngier , Oliver Upton , Mingwei Zhang , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Mark Rutland , Shuah Khan , Ganapatrao Kulkarni , James Clark , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-perf-users@vger.kernel.org, linux-kselftest@vger.kernel.org, Colton Lewis Content-Type: text/plain; charset="UTF-8" Check cntr_mask before using pmccntr to ensure it's available. With a partitioned PMU, there may be instances where pmccntr is being used by the guest and will ba absent from cntr_mask. Signed-off-by: Colton Lewis --- drivers/perf/arm_pmuv3.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/perf/arm_pmuv3.c b/drivers/perf/arm_pmuv3.c index 1cceb1f614515..7ff3139dda893 100644 --- a/drivers/perf/arm_pmuv3.c +++ b/drivers/perf/arm_pmuv3.c @@ -993,6 +993,9 @@ static bool armv8pmu_can_use_pmccntr(struct pmu_hw_events *cpuc, if (evtype != ARMV8_PMUV3_PERFCTR_CPU_CYCLES) return false; + if (!test_bit(ARMV8_PMU_CYCLE_IDX, cpu_pmu->cntr_mask)) + return false; + /* * A CPU_CYCLES event with threshold counting cannot use PMCCNTR_EL0 * since it lacks threshold support. -- 2.54.0.545.g6539524ca2-goog