KVM: x86: nSVM: Save gPAT to vmcb12.g_pat on VMEXIT

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According to the APM volume 3 pseudo-code for "VMRUN," when nested paging
is enabled in the vmcb, the guest PAT register (gPAT) is saved to the vmcb
on emulated VMEXIT.

When KVM_X86_QUIRK_NESTED_SVM_SHARED_PAT is disabled and the vCPU is in
guest mode with nested NPT enabled, save the vmcb02 g_pat field to the
vmcb12 g_pat field on emulated VMEXIT.

Fixes: 15038e1472 ("KVM: SVM: obey guest PAT")
Signed-off-by: Jim Mattson <jmattson@google.com>
Link: https://patch.msgid.link/20260407190343.325299-7-jmattson@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Jim Mattson 2026-04-07 12:03:29 -07:00 • committed by Sean Christopherson

parent 573321b945

commit d65cf222b8

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arch/x86/kvm/svm/nested.c

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