From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f201.google.com (mail-oi1-f201.google.com [209.85.167.201]) (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 2ECF33AD53F for ; Fri, 12 Jun 2026 19:29:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781292558; cv=none; b=XL1RyS7EDn/2Yl4GdEAhlLaA5xrx/AjwbOWvW6RYkr5JxAy6Rd4VXBkMsemw1hFFT4pWeljuuetQscjBYeK/3peRPqpQWJxf/RzV89jreDGLxkiZn4z+EU1oz+lrLa5MGj4ohLZ2to0E/9KHIf8rSpDeapN8INp8X7SJM25WpMc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781292558; c=relaxed/simple; bh=06yjw3p+ipuRaTZAWCI5G1pBBjTnmA793yGUK4DpqJU=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=lEfvsBCM90qH/yqeAxnJjibHtLoJtkZl71wNg3W6p6fPROYPZuVe+1RhOLps1B2RsWnu0cyypz5+SA4XePnom6tyOL1HVVzHYP23nBEHILbVd4rOoJP3GoSHAXX/4VYt8GTQQdNWWlvX5c4gvjqMCALsQ52IhSlA/bwSUOmEXBE= 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=qt4zRkD3; arc=none smtp.client-ip=209.85.167.201 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="qt4zRkD3" Received: by mail-oi1-f201.google.com with SMTP id 5614622812f47-4862fcd9a3cso1686014b6e.2 for ; Fri, 12 Jun 2026 12:29:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1781292555; x=1781897355; 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=2M2UIoQTEUhWBAO6CcMuiUQsYo7FQeN0Fuvmz5eDMgU=; b=qt4zRkD3P79O7CMpCSgk2omvpeByXpgYK9BDRDYhwAC8+FHRR8aGBq7LgT2OwxcuoU PwPKAiPPDUmcZyakBXMBHt5xbzkAyuwYYVR388mFOdByzJkudKL3psOSscsWulusiIOC Br8SXVene6LB43AzjyN7JDdft61KRpCxslVBWRa3ZsAduCrt3p4ztm3NNtAZZiu3ipQX 3j+2fq85DkWaFF/y34kN5cpPYuATR3h8HakRWBcVgHlzN9iZDoCOspsFGGOjpslvcipm FgrQUGSgAcntqR6Txf4LGNcWg0mkC9dNcAHrz0JEh04lpgLotX6ynmO59E2pEn09Riwl B4LQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781292555; x=1781897355; 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=2M2UIoQTEUhWBAO6CcMuiUQsYo7FQeN0Fuvmz5eDMgU=; b=mga/ro9+Q94AcwvkciFj9Pt0KaXWHnO3KjcNqxfwVCzOr0jDXshSu9r51GFsKWcgWJ XClVDDo63p5YZfTvDOSrCPwaJwlK5U7HpPZwvhxkzEKu5W1E3Jryn0BSZPTxpLNdegxb 38GkcsuVsY6uUp5UDIJhNswbGxwZQDT5RqWmuhYjzy7zYaa0k4Fv/uKbDJa9SEX+HBfn Wees1993uK9rj3tiLAkhDerK1SzQkJRNERWsWmcN248arsHOx7fwHf2bRCTNZcm4JdIY 7YJ1riWriuQNKBvWVXzNfp2GnfVtKG4ZbjZnFSHp/XxqlDJ+kKLVrAFZsaSY76EOitdr lclA== X-Forwarded-Encrypted: i=1; AFNElJ8lzjtK2vfKzaxGLVk9J1ZaXKyHQQlxZ/NXX4gZsgSjrlfPm64+FDe5T2GvJWHFjHpgxv0z5VFJwSg=@vger.kernel.org X-Gm-Message-State: AOJu0YxQAIJovoQ75QE9sofg+3MbJqhLJS+C6Jwy4TFK1ynIzKubOm9x I92Tip3Oxn49p15QwbLZVL2e1E5iqnkQpsMC30Xt7KJJCGb+ZAqAv5M3KZxxx6BHgvom4OBrWq0 Pf0sgkw/RTsH/WzhZPpkJkIPjHw== X-Received: from ilbdw10-n1.prod.google.com ([2002:a05:6e02:410a:10b0:502:1132:3db9]) (user=coltonlewis job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6808:1920:b0:479:e7c7:dc76 with SMTP id 5614622812f47-4872f4bc1a3mr2488426b6e.26.1781292554890; Fri, 12 Jun 2026 12:29:14 -0700 (PDT) Date: Fri, 12 Jun 2026 19:28:53 +0000 In-Reply-To: <20260612192909.1153907-1-coltonlewis@google.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260612192909.1153907-1-coltonlewis@google.com> X-Mailer: git-send-email 2.54.0.1136.gdb2ca164c4-goog Message-ID: <20260612192909.1153907-6-coltonlewis@google.com> Subject: [PATCH 05/21] 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 be absent from cntr_mask. Signed-off-by: Colton Lewis --- drivers/perf/arm_pmuv3.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/perf/arm_pmuv3.c b/drivers/perf/arm_pmuv3.c index 1cceb1f614515..17bb1cfdc271c 100644 --- a/drivers/perf/arm_pmuv3.c +++ b/drivers/perf/arm_pmuv3.c @@ -1028,7 +1028,8 @@ static int armv8pmu_get_event_idx(struct pmu_hw_events *cpuc, /* Always prefer to place a cycle counter into the cycle counter. */ if (armv8pmu_can_use_pmccntr(cpuc, event)) { - if (!test_and_set_bit(ARMV8_PMU_CYCLE_IDX, cpuc->used_mask)) + if (test_bit(ARMV8_PMU_CYCLE_IDX, cpu_pmu->cntr_mask) && + !test_and_set_bit(ARMV8_PMU_CYCLE_IDX, cpuc->used_mask)) return ARMV8_PMU_CYCLE_IDX; else if (armv8pmu_event_is_64bit(event) && armv8pmu_event_want_user_access(event) && -- 2.54.0.1136.gdb2ca164c4-goog