KVM: x86/mmu: Skip mmu_notifier check when handling MMIO page fault
Don't retry a page fault due to an mmu_notifier invalidation when handling a page fault for a GPA that did not resolve to a memslot, i.e. an MMIO page fault. Invalidations from the mmu_notifier signal a change in a host virtual address (HVA) mapping; without a memslot, there is no HVA and thus no possibility that the invalidation is relevant to the page fault being handled. Note, the MMIO vs. memslot generation checks handle the case where a pending memslot will create a memslot overlapping the faulting GPA. The mmu_notifier checks are orthogonal to memslot updates. Signed-off-by:Sean Christopherson <seanjc@google.com> Message-Id: <20210222024522.1751719-2-stevensd@google.com> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com>
parent
356c7558
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