KVM: MMU: make kvm_mmu_reset_context() flush the guest TLB
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>
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index da0f3b0..9c629b5 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -3054,8 +3054,18 @@
int kvm_mmu_reset_context(struct kvm_vcpu *vcpu)
{
+ int r;
+
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);