From nobody Sun Feb 8 22:06:40 2026 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (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 F2AAA298987 for ; Sat, 7 Feb 2026 01:23:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770427440; cv=none; b=VIxK9fUQr51aFKcekYJu5Fx52FCv8+DG9k6UdL2VgVTdpu5LNmJmZemEo0T2pwDvuVEJDzpZqoS6N8viiAXkQyGvCZ+qsZ4XfqBCDOL0l9VVMZ7BXWOf4U3HG8LmDry1A2xCEcqgFfxDXRyshMwzgSdp5pWO+vfYH9Ku2FBJLLM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770427440; c=relaxed/simple; bh=VX6DCgwNWjB+/bxyXx2Y/ERrnxSlvMrxT8BUrW+i6nk=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=n5z9Mkg4dUUE4zjpi9xrNP+fEUedVXAGW0gffzVn3+Z9HUuXuQtue/32VV5EpAmFqhdjS68JlfGpWgX6SguvqeTYLs7w0MHCgHFodmtNKLvWi4bqtXjjKFjn/VLJVAogZA0bjQ8BPS2ur/sDIDlDVKJcfZ4Sn1T+V15ug04Ntyg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--jmattson.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=IjOQ+/4R; arc=none smtp.client-ip=209.85.216.73 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--jmattson.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="IjOQ+/4R" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-354c0234c1fso590908a91.2 for ; Fri, 06 Feb 2026 17:23:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1770427439; x=1771032239; 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=2fG+Y9KC4ijGwyN19NJSb/KoIzzrPjnkRSfXL2ajm3I=; b=IjOQ+/4RuSquwHXKoAa9vFe/yfc+SUwVw3ngAcB1u7guSkjCeZsNMJNJ4WD13gqXVz pRpSGajBjF4DIay+yyPeu8G5dPjn6gDCUiRdlkD5w7SXC7OMPulzV0FV6yqD86x7v4zl yMo4hbBLVzhTZF8AJwFz21LcE2DHOeSwH3UOU2uvEW8/juW9/pPJIrtj5SUmmQ+0CyKq 4AioybtSBxjAM/hwTFgntglIw37/ibNhVh5Wq6UUtuyn8l0+wO0F0b77e7vuAz9xKyXK hq/NmHrph5WRnxJ02tc8KtI1/zmwP9omdNU8A4taYcj7rH23ffEy1lBZRckU8yoQRnwZ fsAA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770427439; x=1771032239; 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=2fG+Y9KC4ijGwyN19NJSb/KoIzzrPjnkRSfXL2ajm3I=; b=aKz5iGA/+ypxrH+0WWTkVfBQ9otjYf/4wkv34F2/RiX17EkeS9aDUqPMcD54E/yWiS 2cwfjY8TO2anzqFlM6NropqcutevM3IXY7DFsfNiPepPMY9PFwjxobn+AhZ5JpQT3Rw/ 3mkNX1Xx5IsT1efOgnZawfANxon8IRxBw/yEZlgSUdEjWZoE90SPkXOD0vOiGR0OTtDw ZC0VuwXmEPxsaW4og+Z9hNbbVyI1GC0ftbAInZtnJKHAhv3ZfUFy0i2GnrDY2cewf36C QxI1/hZ1xm+6eyR+arUtYPVdH69WxNDrxPIy9j1KiNtVnESu/PCWJlKTDhymGoSUDutR 45tQ== X-Forwarded-Encrypted: i=1; AJvYcCWNuq/cfsORjl1SU0lxEgpjr74/fdMlOumcv3ZpY8dvLSD74ne8iW1jJEW+uKtwY4pUr7nLgPdJ2eidBJg=@vger.kernel.org X-Gm-Message-State: AOJu0Ywbv9tHovjdQjqYa4hhYZ5Ue9bdTwxs6MxDvxy0yLB7cziki26K PluryTiSWx6SAlrWldpmm78GVYUeBrdv4ERoox5nceNDpLitNCAPlvcvT3lkCvN/E9lyau6vExX zyJg7yA+M/827/w== X-Received: from pgum10.prod.google.com ([2002:a65:6a0a:0:b0:b49:d798:eefa]) (user=jmattson job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a20:a127:b0:366:14b0:4b0b with SMTP id adf61e73a8af0-393ad3ddbf4mr4788833637.71.1770427439372; Fri, 06 Feb 2026 17:23:59 -0800 (PST) Date: Fri, 6 Feb 2026 17:23:30 -0800 In-Reply-To: <20260207012339.2646196-1-jmattson@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260207012339.2646196-1-jmattson@google.com> X-Mailer: git-send-email 2.53.0.rc2.204.g2597b5adb4-goog Message-ID: <20260207012339.2646196-5-jmattson@google.com> Subject: [PATCH v3 4/5] KVM: x86/pmu: Allow Host-Only/Guest-Only bits with nSVM and mediated PMU From: Jim Mattson To: Sean Christopherson , Paolo Bonzini , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Peter Zijlstra , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , Shuah Khan , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-kselftest@vger.kernel.org, Yosry Ahmed , Mingwei Zhang , Sandipan Das Cc: Jim Mattson Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" If the vCPU advertises SVM and uses the mediated PMU, allow the guest to set the Host-Only and Guest-Only bits in the event selector MSRs. Signed-off-by: Jim Mattson --- arch/x86/kvm/svm/pmu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kvm/svm/pmu.c b/arch/x86/kvm/svm/pmu.c index e2a849fc7daa..7de7d8d00427 100644 --- a/arch/x86/kvm/svm/pmu.c +++ b/arch/x86/kvm/svm/pmu.c @@ -243,6 +243,9 @@ static void amd_pmu_refresh(struct kvm_vcpu *vcpu) =20 pmu->counter_bitmask[KVM_PMC_GP] =3D BIT_ULL(48) - 1; pmu->reserved_bits =3D 0xfffffff000280000ull; + if (guest_cpu_cap_has(vcpu, X86_FEATURE_SVM) && + kvm_vcpu_has_mediated_pmu(vcpu)) + pmu->reserved_bits &=3D ~AMD64_EVENTSEL_HOST_GUEST_MASK; pmu->raw_event_mask =3D AMD64_RAW_EVENT_MASK; /* not applicable to AMD; but clean them to prevent any fall out */ pmu->counter_bitmask[KVM_PMC_FIXED] =3D 0; --=20 2.53.0.rc2.204.g2597b5adb4-goog