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authorAvi Kivity <avi@redhat.com>2009-06-10 12:56:54 +0300
committerAvi Kivity <avi@redhat.com>2009-09-10 08:32:50 +0300
commit439e218a6f4716da484314fc5a1f0a59b0212c01 (patch)
treeb582edacc647f74f514417525f28e5f4c7f218f0 /arch
parent7ffd92c53c5ebd0ad5a68ac3ca033c3a06374d19 (diff)
KVM: MMU: Fix is_dirty_pte()
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/mmu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 8ee67e3fb9d..8f2cb29db2f 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)