| From | Avi Kivity <> | Subject | [PATCH 42/48] KVM: MMU: Fix is_dirty_pte() | Date | Sun, 16 Aug 2009 12:30:02 +0300 |
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is_dirty_pte() is used on guest ptes, not shadow ptes, so it needs to avoid shadow_dirty_mask and use PT_DIRTY_MASK instead.
Misdetecting dirty pages could lead to unnecessarily setting the dirty bit under EPT.
Signed-off-by: Avi Kivity <avi@redhat.com> --- arch/x86/kvm/mmu.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 8ee67e3..8f2cb29 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -242,7 +242,7 @@ static int is_writeble_pte(unsigned long pte) static int is_dirty_pte(unsigned long pte) { - return pte & shadow_dirty_mask; + return pte & PT_DIRTY_MASK; } static int is_rmap_pte(u64 pte) -- 1.6.3.3
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