From nobody Tue Oct 7 05:24:01 2025 Received: from mail-io1-f73.google.com (mail-io1-f73.google.com [209.85.166.73]) (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 43D5C2868B7 for ; Mon, 14 Jul 2025 22:59:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752533981; cv=none; b=bl/UiHksckxp+FlSLkbzkPXY11cRqQxuY+qO7VUt4BEA7MIAuxb7x3fG+UcGmrciKuHLBwBiNvmSRGfD2Or643iCzPwfmkmeZPa2iK3zXV10lZVIj4ugaH0Vb1lnNI1TEe68vePpy53+ybuWwI9CmnH2msIuD0W1pgJIwmGrt8w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752533981; c=relaxed/simple; bh=83DjgNByW3MicWNoftr7pf8Sgs8ybpROMTZWgSw674M=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=QZpoB9ZPcJYR84ANCEpI6XrIPDooLgWllkKqI8SMkdQbwItqCihqS2UKsE/ELSiySqcSIBZCvli0FaYMpNzHg4eN9YmkH4Aex5Cy3MDlIFx9CTGm2D9glDU/VCN6RC4FgG7xS1yEJdVbHJa9zvChCfGob5raXI4kRH/lndNAIoo= 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=FUACJx5m; arc=none smtp.client-ip=209.85.166.73 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="FUACJx5m" Received: by mail-io1-f73.google.com with SMTP id ca18e2360f4ac-873fd6e896bso510656039f.3 for ; Mon, 14 Jul 2025 15:59:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1752533977; x=1753138777; 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=hXtQgo0JIkUT7TODCNQx7pYKeIXv6hb0g8DOUP6P7to=; b=FUACJx5mo6xzMNDLcxRqhBj7UnvTTJlxbdak1ZK2aycYSGfSzBKemoFXKLfksXl7sx QE6r+supNZ/1uITj2K4roR//Gf4UqFHBoeWvo8j6C/1cJaIlRq1Jb0lM17zb1PF2KlLl jk0g+9a+iMQBcYxegAdi3gAIUdd4TLzZ153SrCh45lWy1tyfg1NVieyRXTZASCvSwj7r bhE9xhAayWmI6Hk9i8iyCJbOZE+64I74yVknBfX26uqkRxHxJmt8OO8A1NhuVLWyTNRD kLujbqskggaREfQymX06zzprHAWMEVhPzLVB73MUcDX8+q3wSHND+irXHj0Pca/ko9Ub UK7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1752533977; x=1753138777; 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=hXtQgo0JIkUT7TODCNQx7pYKeIXv6hb0g8DOUP6P7to=; b=L0V7950c1jXD3D04KmxleeryyjZt6qqvyXK2gf6Mt2gHJ2xXK9yaSubyxLbPftFleZ rveZ/5lQcCszlGTzHGJ2J2zPsmFRSXZFBmkP9zHYvkKlmGE2FJuqF38kZmqBukVItIEc TzlGje2rO2xQFLB5ve61Dy3nOoyTaY72ydS2o/POqtZLKFal2Hj3PamXx3wxDBrWeSbb MUGx4MnShabHrezxCOp017mTi9+L3/TroxIkqkMsfKVJYwy0KNBZ2sxlKDJ1IwMAa2iE EAxQ8fGBSBiINQnLpwV7uZ3VukJRuqhz1s0qlxYpaNh7jedNkEVTxu+yTRrFChpSfsEm CaJQ== X-Forwarded-Encrypted: i=1; AJvYcCUdoI+nc4z4yrhxalLEmAsCfLdLUk+SdEX00t/1UC/eyNnqfpT6rAHL98erKMMWaGCOYcppBLYeINJOY44=@vger.kernel.org X-Gm-Message-State: AOJu0Yw/O1oPmWMaBbIXaEOgm2aa3lUBgBN1vEXmnQ3snM5xq/x/HnRs 0gnXtVmOgTBI3oYz+TebJ1F6/TW7DWDVxvvK++347wSBOvGMUmpbwuN4V0BhbNLLcPaexFvhfEL +BlxgilBtIy5hMkozAWJb3yEuwg== X-Google-Smtp-Source: AGHT+IHBO0mASu578wHJOGcQpQ9A5EOTJJDI2Tsl6mLeD713vdCHw+Xsr7SE46k9aYTsouWFo/KzgvhsXQhtYGQfSw== X-Received: from ioni15.prod.google.com ([2002:a5d:840f:0:b0:855:9384:bf3d]) (user=coltonlewis job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6602:380d:b0:85d:b054:6eb9 with SMTP id ca18e2360f4ac-87977ff3c65mr1759326739f.14.1752533977132; Mon, 14 Jul 2025 15:59:37 -0700 (PDT) Date: Mon, 14 Jul 2025 22:59:01 +0000 In-Reply-To: <20250714225917.1396543-1-coltonlewis@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250714225917.1396543-1-coltonlewis@google.com> X-Mailer: git-send-email 2.50.0.727.gbf7dc18ff4-goog Message-ID: <20250714225917.1396543-8-coltonlewis@google.com> Subject: [PATCH v4 07/23] KVM: arm64: Account for partitioning in kvm_pmu_get_max_counters() From: Colton Lewis To: kvm@vger.kernel.org Cc: 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 , 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-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Since cntr_mask is modified when the PMU is partitioned to remove some bits and kvm_pmu_get_max_counters() uses that bitmask to determine how many counters are on the system, make sure that function also counts the counters that are no longer in the bitmask. Signed-off-by: Colton Lewis --- arch/arm64/kvm/pmu.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/pmu.c b/arch/arm64/kvm/pmu.c index 79b7ea037153..8a21ddc42f67 100644 --- a/arch/arm64/kvm/pmu.c +++ b/arch/arm64/kvm/pmu.c @@ -533,6 +533,7 @@ static bool pmu_irq_is_valid(struct kvm *kvm, int irq) u8 kvm_arm_pmu_get_max_counters(struct kvm *kvm) { struct arm_pmu *arm_pmu =3D kvm->arch.arm_pmu; + u8 counters; =20 /* * PMUv3 requires that all event counters are capable of counting any @@ -545,7 +546,12 @@ u8 kvm_arm_pmu_get_max_counters(struct kvm *kvm) * The arm_pmu->cntr_mask considers the fixed counter(s) as well. * Ignore those and return only the general-purpose counters. */ - return bitmap_weight(arm_pmu->cntr_mask, ARMV8_PMU_MAX_GENERAL_COUNTERS); + counters =3D bitmap_weight(arm_pmu->cntr_mask, ARMV8_PMU_MAX_GENERAL_COUN= TERS); + + if (kvm_pmu_is_partitioned(arm_pmu)) + counters +=3D arm_pmu->hpmn_max; + + return counters; } =20 static void kvm_arm_set_nr_counters(struct kvm *kvm, unsigned int nr) --=20 2.50.0.727.gbf7dc18ff4-goog