KVM: x86: nSVM: Cache and validate vmcb12 g_pat

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When KVM_X86_QUIRK_NESTED_SVM_SHARED_PAT is disabled and nested paging is
enabled in vmcb12, validate g_pat at emulated VMRUN and cause an immediate
VMEXIT with exit code VMEXIT_INVALID if it is invalid, as specified in the
APM, volume 2: "Nested Paging and VMRUN/VMEXIT."

Fixes: 3d6368ef58 ("KVM: SVM: Add VMRUN handler")
Signed-off-by: Jim Mattson <jmattson@google.com>
Link: https://patch.msgid.link/20260407190343.325299-4-jmattson@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Jim Mattson 2026-04-07 12:03:26 -07:00 • committed by Sean Christopherson

parent 0a8aeb1584

commit 4b83e4ba83

2 changed files with 20 additions and 4 deletions

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23

arch/x86/kvm/svm/nested.c

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1

arch/x86/kvm/svm/svm.h

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