kvm: x86: mmu: Verify that restored PTE has needed perms in fast page fault

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Before fast page fault restores an access track PTE back to a regular PTE,
it now also verifies that the restored PTE would grant the necessary
permissions for the faulting access to succeed. If not, it falls back
to the slow page fault path.

Signed-off-by: Junaid Shahid <junaids@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Junaid Shahid 2016-12-21 20:29:32 -08:00 • committed by Paolo Bonzini

parent d162f30a7c

commit d3e328f2cb

1 changed files with 68 additions and 59 deletions

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arch/x86/kvm/mmu.c

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