KVM: MMU: Fix Wrong tlb flush order

Need to flush the tlb after updating a pte, not before.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c
index ad50cfd..49ffbd3 100644 (file)
--- a/drivers/kvm/mmu.c
+++ b/drivers/kvm/mmu.c
@@ -441,8 +441,8 @@ static void rmap_write_protect(struct kvm_vcpu *vcpu, u64 gfn)
                BUG_ON(!(*spte & PT_WRITABLE_MASK));
                rmap_printk("rmap_write_protect: spte %p %llx\n", spte, *spte);
                rmap_remove(vcpu, spte);
-               kvm_flush_remote_tlbs(vcpu->kvm);
                set_shadow_pte(spte, *spte & ~PT_WRITABLE_MASK);
+               kvm_flush_remote_tlbs(vcpu->kvm);
        }
 }