When mapping into the TDP MMU, WARN (if KVM_PROVE_MMU=y) if the root is invalid, e.g. if KVM is attempting to insert a mapping without checking if the information and MMU context is fresh.
Signed-off-by: Sean Christopherson <[email protected]> --- arch/x86/kvm/mmu/tdp_mmu.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index c5734ca5c17d..440fd8f80397 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -1273,6 +1273,8 @@ int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault) struct kvm_mmu_page *sp; int ret = RET_PF_RETRY; + KVM_MMU_WARN_ON(!root || root->role.invalid); + kvm_mmu_hugepage_adjust(vcpu, fault); trace_kvm_mmu_spte_requested(fault); -- 2.51.1.930.gacf6e81ea2-goog
