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KVM: x86/mmu: Expand and clean up page fault stats
Expand and clean up the page fault stats. The current stats are at best incomplete, and at worst misleading. Differentiate between faults that are actually fixed vs those that result in an MMIO SPTE being created, track faults that are spurious, faults that trigger emulation, faults that that are fixed in the fast path, and last but not least, track the number of faults that are taken. Note, the number of faults that require emulation for write-protected shadow pages can roughly be calculated by subtracting the number of MMIO SPTEs created from the overall number of faults that trigger emulation. Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20220423034752.1161007-10-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Sean Christopherson
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Paolo Bonzini
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May 12, 2022
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