From nobody Mon Feb 9 13:02:54 2026 Received: from mail-pj1-f74.google.com (mail-pj1-f74.google.com [209.85.216.74]) (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 60A9A239567 for ; Tue, 13 Jan 2026 00:30:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768264240; cv=none; b=JfD2Gm03l21ERvdgAWIlEX/LE32h0WYzCYvD91wUKVaUPGVgfAg87uELy6WCzY+u+TyQTf0EPDJQ5XmGlgBjG9oTtUh91Gkotzj3bfKaQRzBN1S5XHGAzKAlB8EL3CyLDnIZf/MfM0LPD/ZPXY0Lk2GLmxhxguSNkxMXhnj52l4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768264240; c=relaxed/simple; bh=Ui/XUDGeY/+Q+sHshnx+alC9tTo/Vg2ztYyLctjToo0=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=U3mhgGZBrgnlXyQMHQQNZ01SdawORs24U/rdUVKNBGrdNxdn6ZAyRuOiHtPb8ffEQOF6aKiDTPbrufgjFHBkKM/PFcUj8LfIlvZExaa37pTFVc2L7Qnu5ciVjJPrKdSSDqnNsPD+eBcr1Lb2Z7AdsqkFMyzKE2XP5aY7tKRkoAk= 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=GwM/QI3I; arc=none smtp.client-ip=209.85.216.74 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="GwM/QI3I" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-34c5d203988so2567308a91.3 for ; Mon, 12 Jan 2026 16:30:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1768264239; x=1768869039; 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=cmQ9PjY09gqi0kYdJAs4HO7SIXa24cDXIcMDQNhHsdk=; b=GwM/QI3I83+sd6HheXvQ9wOUyjn08n0cYYlE4jk+6ln4XlYTD8u4r+k5z7Z3lOBiO8 4AU2lQUjlaSddpXg5YvUoLBozEy8ESX7ysxLhkLfRY+DgD9YZ6ikOrzMKZuUusgwai7X y1PEtmXjMS3g1uS4U7w/zbscL2p/WnjF82ySIlz/7Dv68TdzJSmLQap+gbcBKAqJ5U7H tXTvMfSbED8o/CoAockTW2b+fTkVr3+IpPH6KBR5Ieix9kBQhyIR1XPXB5FVx0/TtsxI BGJG+aZLQDfLs/gv6Ye/HPf/OGvOokPTmbDAdb+32Wsqj50IBddEV16sjKzObcm30s8w Hzgg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768264239; x=1768869039; 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=cmQ9PjY09gqi0kYdJAs4HO7SIXa24cDXIcMDQNhHsdk=; b=sKu+j02XiklPaCHMwfP2gpfAx3s109zee5AkxOv2D/MQivhANnT4Z/QMDW1j2HUgVM xcSSZYYF7UJyznL8f4U9OqnNv0uCk4NOJbfAgkiYkd0DJIQDvuTI8GLd8AdvOa8CJJJD W3kSCvdUNkzur6NIbt4XqkncUAH+2ARSQkrJzRpUFwNIgoa9Vivpm0VGZMG3jluc49rE g0V8Inq4gO1ZB7GkE3CVsVisyq9MLvRyQCZvtPFbebjsQeJ6ia1KxsoMO9ezzGmHKalI YJt+DnmiJLX/hUYuOpVDP7NME+7xYAVbEWuMZy5W6KMoDa4QiXhxYBFmmXWYaLlKDBNc Jhyg== X-Forwarded-Encrypted: i=1; AJvYcCVtFHMong7Qyghj1EuSQN4bwdsus93ZrV3EESJfKZ4r7rjilWmeK0S6WTk0I1tiowgAVQsZYmpXzFgXaU4=@vger.kernel.org X-Gm-Message-State: AOJu0Yx0xIz5UDVZfd4eM37Z4VaDfCPuKOpCO9QSUNMHxnR4wOhJ8Hq4 w7763AX2CTkUGK1lXcoWbzbCb2+4uqXGMMpUPOzwghyBBNF8FXoH/fX6D0PqxOg0iiXMwlginby i3C4ls/tEBDORGQ== X-Google-Smtp-Source: AGHT+IH/xW0B9YTnUc6Tre/AN51y9XcCmjAIiRBOk0NtxIjZpkCE1FCgRSNgggbRuJfP/HCE+gF4FkdVm16wgQ== X-Received: from pjbqo8.prod.google.com ([2002:a17:90b:3dc8:b0:34c:3239:171f]) (user=jmattson job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:3c09:b0:349:2154:eef4 with SMTP id 98e67ed59e1d1-34f68b83d71mr15324988a91.5.1768264238794; Mon, 12 Jan 2026 16:30:38 -0800 (PST) Date: Mon, 12 Jan 2026 16:29:57 -0800 In-Reply-To: <20260113003016.3511895-1-jmattson@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260113003016.3511895-1-jmattson@google.com> X-Mailer: git-send-email 2.52.0.457.g6b5491de43-goog Message-ID: <20260113003016.3511895-3-jmattson@google.com> Subject: [PATCH 02/10] KVM: x86: nSVM: Add VALID_GPAT flag to kvm_svm_nested_state_hdr From: Jim Mattson To: Sean Christopherson , Paolo Bonzini , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Shuah Khan , Joerg Roedel , Avi Kivity , Alexander Graf , "=?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?=" , David Hildenbrand , Cathy Avery , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: Jim Mattson Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Now that the svm_copy_vmrun_state() copies the g_pat field, L1's g_pat will be stored in the serialized nested state. Add a 'flags' field to the SVM nested state header, define a VALID_GPAT flag, and start reporting this flag in the serialized nested state populated by KVM_GET_NESTED_STATE. Note that struct kvm_svm_nested_state_hdr is included in a union padded to 120 bytes, so there is room to add the flags field without changing any offsets. Signed-off-by: Jim Mattson --- arch/x86/include/uapi/asm/kvm.h | 3 +++ arch/x86/kvm/svm/nested.c | 1 + 2 files changed, 4 insertions(+) diff --git a/arch/x86/include/uapi/asm/kvm.h b/arch/x86/include/uapi/asm/kv= m.h index 7ceff6583652..18581c4b2511 100644 --- a/arch/x86/include/uapi/asm/kvm.h +++ b/arch/x86/include/uapi/asm/kvm.h @@ -495,6 +495,8 @@ struct kvm_sync_regs { =20 #define KVM_STATE_VMX_PREEMPTION_TIMER_DEADLINE 0x00000001 =20 +#define KVM_STATE_SVM_VALID_GPAT 0x00000001 + /* vendor-independent attributes for system fd (group 0) */ #define KVM_X86_GRP_SYSTEM 0 # define KVM_X86_XCOMP_GUEST_SUPP 0 @@ -530,6 +532,7 @@ struct kvm_svm_nested_state_data { =20 struct kvm_svm_nested_state_hdr { __u64 vmcb_pa; + __u32 flags; }; =20 /* for KVM_CAP_NESTED_STATE */ diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index a0e5bf1aba52..ed24e08d2d21 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -1769,6 +1769,7 @@ static int svm_get_nested_state(struct kvm_vcpu *vcpu, /* First fill in the header and copy it out. */ if (is_guest_mode(vcpu)) { kvm_state.hdr.svm.vmcb_pa =3D svm->nested.vmcb12_gpa; + kvm_state.hdr.svm.flags =3D KVM_STATE_SVM_VALID_GPAT; kvm_state.size +=3D KVM_STATE_NESTED_SVM_VMCB_SIZE; kvm_state.flags |=3D KVM_STATE_NESTED_GUEST_MODE; =20 --=20 2.52.0.457.g6b5491de43-goog