From nobody Tue Dec 16 14:51:26 2025 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 152F824503F for ; Sat, 6 Dec 2025 00:18:02 +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=1764980285; cv=none; b=FUFH3DouIsqbkGv66FnsqUDdjhZMMKwKbFM6l9PAQ8KJXeA+SJfyobd46h9F4RsrmmL4lxriM46oYTLEOoQDTYgV2PL+0HT5+8ZSoJK2VHC1QYi5175fKZx467DVltrW/lcf1FoioFBSDgLmrVQaDZf7FuXFxGRotYOj4n+9umY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764980285; c=relaxed/simple; bh=GEofwV87pfS9k1X1r08HpHCiDsjoBWg3ivwGBCrzyh4=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=VKzXhipulI1op52T+CmPxrqZuJeG+Y8GduSOXkp3H/9DoQQWSdQgJLH0MeHi/78OJVrp4rdBuyafLd3YcYCllSvczka+vK5frLjoTgQlnlXhYWTzgIHDRmJNFvAe7Jf2FNhRNTz8XrHRHoBmUmdL0JHk1a+Rl+P3x1WVHsx1WnY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=FenbBuyJ; 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--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="FenbBuyJ" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-34992a92fa0so1248106a91.3 for ; Fri, 05 Dec 2025 16:18:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1764980282; x=1765585082; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=m3Z5nHAcUfdxfKrbAwjeK85mE0dJR71iRHLzzuZPmpA=; b=FenbBuyJ+Mymh8FeAYi6ewPvo702dpo6qmzB9tnBX010au9ZDIEj9yLwu28Xc96Uck wE4nljrLpSVbynZSLrta2EXgiwXCn+nSEpsshkOPeDjjs37MPmCoLhW/fgDRs1RUpnMl GYeSl/or3Lq98FQNMmy1SVfGqngSfQJ1Yq0gxTt7Y3Kiht85FShrYRkPpubOftztC2Hk WIpiiPVuvHXNv0vMX2Z4HdFpQ8riebRADQYXbRllcRoMOYf8oF4YqUsULSc7mU6lt0Sd vdL3uV3Ik5PkuoCAehrrBYkvsKc7YE0Ltos1guOR6bAlAZtF3CV2I9k1xQYD+lRF6PRQ KPug== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1764980282; x=1765585082; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=m3Z5nHAcUfdxfKrbAwjeK85mE0dJR71iRHLzzuZPmpA=; b=JM506UXqeCZOqj+CU2AcPKlFNaB4CkSJ0yha3SiCHNrh83ByHbAC6qOTvKiJDO8rIg dJAp1hQWV3rvnpAHTJHDCatJF+W+1Uke/K/s0mu6yS5wNkAap8TSwZ7E/3bk4fbfiDdG KrWlMKH+63nxaSHbCigj+JjQaQDAjEAayHJFa1G0B5P4hhx9G5aDzvad706qJyD0Nx9D bJDDcxezalNnyapLEAQYZSS6Kegjrfk+/hSZTnmv6Dia+ZmwE/hJtltJoQ9LI8qP3QvE ZG0Ci/3q3UJpQbncmIE2M4jnWyKrAmenlL8WaQRqWkF0ur7/4DhkD6jWmLax/fgzwujx GjvA== X-Forwarded-Encrypted: i=1; AJvYcCUolAXzVBqOzQAY97Hktjc3h+BbEYExu+sJD8Q+hJSSmlYXu25XPp9PMyTvUaHnWwYsCHQwCLSgFXsmlOU=@vger.kernel.org X-Gm-Message-State: AOJu0YyG7Kl5ZkLvzJIgzALntrr07EPPvDiqIjbe+cNXyW66AtVNG0ll 4vLEnjvqlFWIZ/V/JPMkHgNsG3nA8aBifGq6ZNSiKZSrVimmW1wyNq9DSxPaFLQFq3DqKuBg7K/ AEGR9bg== X-Google-Smtp-Source: AGHT+IGcOklQOzJ/lNZWJnk8g0uw9rVYfuzrIb6PtX+N9IOeiT702eHEqjavt0HC1DcnaOX9m2isN8tDRpE= X-Received: from pjyt22.prod.google.com ([2002:a17:90a:e516:b0:340:92f6:5531]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90a:d2cb:b0:33b:b078:d6d3 with SMTP id 98e67ed59e1d1-349a25bcd68mr661307a91.23.1764980281984; Fri, 05 Dec 2025 16:18:01 -0800 (PST) Reply-To: Sean Christopherson Date: Fri, 5 Dec 2025 16:16:54 -0800 In-Reply-To: <20251206001720.468579-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251206001720.468579-1-seanjc@google.com> X-Mailer: git-send-email 2.52.0.223.gf5cc29aaa4-goog Message-ID: <20251206001720.468579-19-seanjc@google.com> Subject: [PATCH v6 18/44] KVM: x86/pmu: Implement AMD mediated PMU requirements From: Sean Christopherson To: Marc Zyngier , Oliver Upton , Tianrui Zhao , Bibo Mao , Huacai Chen , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Xin Li , "H. Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Sean Christopherson , Paolo Bonzini Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvm@vger.kernel.org, loongarch@lists.linux.dev, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Mingwei Zhang , Xudong Hao , Sandipan Das , Dapeng Mi , Xiong Zhang , Manali Shukla , Jim Mattson Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Require host PMU version 2+ for AMD mediated PMU support, as PERF_GLOBAL_CTRL and friends are hard requirements for the mediated PMU. Signed-off-by: Dapeng Mi Co-developed-by: Mingwei Zhang Signed-off-by: Mingwei Zhang [sean: extract to separate patch, write changelog] Reviewed-by: Sandipan Das Tested-by: Xudong Hao Signed-off-by: Sean Christopherson --- arch/x86/kvm/svm/pmu.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/x86/kvm/svm/pmu.c b/arch/x86/kvm/svm/pmu.c index bc062285fbf5..16c88b2a2eb8 100644 --- a/arch/x86/kvm/svm/pmu.c +++ b/arch/x86/kvm/svm/pmu.c @@ -227,6 +227,11 @@ static void amd_pmu_init(struct kvm_vcpu *vcpu) } } =20 +static bool amd_pmu_is_mediated_pmu_supported(struct x86_pmu_capability *h= ost_pmu) +{ + return host_pmu->version >=3D 2; +} + struct kvm_pmu_ops amd_pmu_ops __initdata =3D { .rdpmc_ecx_to_pmc =3D amd_rdpmc_ecx_to_pmc, .msr_idx_to_pmc =3D amd_msr_idx_to_pmc, @@ -236,6 +241,9 @@ struct kvm_pmu_ops amd_pmu_ops __initdata =3D { .set_msr =3D amd_pmu_set_msr, .refresh =3D amd_pmu_refresh, .init =3D amd_pmu_init, + + .is_mediated_pmu_supported =3D amd_pmu_is_mediated_pmu_supported, + .EVENTSEL_EVENT =3D AMD64_EVENTSEL_EVENT, .MAX_NR_GP_COUNTERS =3D KVM_MAX_NR_AMD_GP_COUNTERS, .MIN_NR_GP_COUNTERS =3D AMD64_NUM_COUNTERS, --=20 2.52.0.223.gf5cc29aaa4-goog