[PATCH 0/2] KVM: SVM: Aggressively clear vmcb02 clean bits

From: Jim Mattson

Date: Mon Sep 22 2025 - 12:29:44 EST


It is unlikely that L1 will toggle the MSR intercept bit in vmcb02,
or that L1 will change its own IA32_PAT MSR. However, if it does,
the affected fields in vmcb02 should not be marked clean.

An alternative approach would be to implement a set of mutators for
vmcb02 fields, and to clear the associated clean bit whenever a field
is modified.

Jim Mattson (2):
KVM: SVM: Mark VMCB_PERM_MAP as dirty on nested VMRUN
KVM: SVM: Mark VMCB_NPT as dirty on nested VMRUN

arch/x86/kvm/svm/nested.c | 2 ++
1 file changed, 2 insertions(+)

--
2.51.0.470.ga7dc726c21-goog