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KVM: MMU: flush remote tlbs when overwriting spte with different pfn

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After remove a rmap, we should flush all vcpu's tlb

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Xiao Guangrong
2010-06-30 16:04:06 +08:00
committed by Marcelo Tosatti
parent da38f43859
commit 91546356d0
1 changed files with 2 additions and 0 deletions
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arch/x86/kvm/mmu.c
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@@ -1879,6 +1879,8 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
pgprintk("hfn old %lx new %lx\n", pgprintk("hfn old %lx new %lx\n",
spte_to_pfn(*sptep), pfn); spte_to_pfn(*sptep), pfn);
rmap_remove(vcpu->kvm, sptep); rmap_remove(vcpu->kvm, sptep);
__set_spte(sptep, shadow_trap_nonpresent_pte);
kvm_flush_remote_tlbs(vcpu->kvm);
} else } else
was_rmapped = 1; was_rmapped = 1;
} }