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>

parent 411c588d

arch/x86/kvm/mmu.c

+11 −1

Original line number	Diff line number	Diff line
		@@ -3054,8 +3054,18 @@ static void destroy_kvm_mmu(struct kvm_vcpu *vcpu)

		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);