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KVM: MMU: make kvm_mmu_reset_context() flush the guest TLB

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kvm_set_cr0() and kvm_set_cr4(), and possible other functions,
assume that kvm_mmu_reset_context() flushes the guest TLB.  However,
it does not.

Fix by flushing the tlb (and syncing the new root as well).

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity
2011-06-12 18:14:08 +03:00
parent 411c588dfb
commit 45bd07b9d5
1 changed files with 11 additions and 1 deletions
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12
arch/x86/kvm/mmu.c
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@@ -3054,8 +3054,18 @@ static void destroy_kvm_mmu(struct kvm_vcpu *vcpu)
int kvm_mmu_reset_context(struct kvm_vcpu *vcpu) int kvm_mmu_reset_context(struct kvm_vcpu *vcpu)
{ {
int r;
destroy_kvm_mmu(vcpu); destroy_kvm_mmu(vcpu);
return init_kvm_mmu(vcpu); r = init_kvm_mmu(vcpu);
if (r)
goto err;
kvm_mmu_sync_roots(vcpu);
kvm_mmu_flush_tlb(vcpu);
err:
return r;
} }
EXPORT_SYMBOL_GPL(kvm_mmu_reset_context); EXPORT_SYMBOL_GPL(kvm_mmu_reset_context);