linux-kernel - [PATCH 01/10] KVM: x86: nSVM: Add g_pat to fields copied by svm_copy_vmrun

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Message-ID: <20260113003016.3511895-2-jmattson@google.com>
Date: Mon, 12 Jan 2026 16:29:56 -0800
From: Jim Mattson <jmattson@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>, 
	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, 
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org, 
	"H. Peter Anvin" <hpa@...or.com>, Shuah Khan <shuah@...nel.org>, Joerg Roedel <joro@...tes.org>, 
	Avi Kivity <avi@...hat.com>, Alexander Graf <agraf@...e.de>, 
	"Radim Krčmář" <rkrcmar@...hat.com>, David Hildenbrand <david@...nel.org>, Cathy Avery <cavery@...hat.com>, 
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-kselftest@...r.kernel.org
Cc: Jim Mattson <jmattson@...gle.com>
Subject: [PATCH 01/10] KVM: x86: nSVM: Add g_pat to fields copied by svm_copy_vmrun_state()

The vmcb01 g_pat field holds the value of L1's IA32_PAT MSR. To
preserve this value through virtual SMM and serialization, add g_pat
to the fields copied by svm_copy_vmrun_state().

Signed-off-by: Jim Mattson <jmattson@...gle.com>
---
 arch/x86/kvm/svm/nested.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index f295a41ec659..a0e5bf1aba52 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -1090,6 +1090,7 @@ void svm_copy_vmrun_state(struct vmcb_save_area *to_save,
 	to_save->gdtr = from_save->gdtr;
 	to_save->idtr = from_save->idtr;
 	to_save->rflags = from_save->rflags | X86_EFLAGS_FIXED;
+	to_save->g_pat = from_save->g_pat;
 	to_save->efer = from_save->efer;
 	to_save->cr0 = from_save->cr0;
 	to_save->cr3 = from_save->cr3;
-- 
2.52.0.457.g6b5491de43-goog