KVM: nVMX: Clear segment cache after switching between L1 and L2

Switching the VMCS obviously invalidates what may have been cached about
the guest segments.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 329836a..3a58c1b 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -7271,6 +7271,8 @@ static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch)
        vcpu->cpu = cpu;
        put_cpu();
 
+       vmx_segment_cache_clear(vmx);
+
        vmcs12->launch_state = 1;
 
        prepare_vmcs02(vcpu, vmcs12);
@@ -7517,6 +7519,8 @@ static void nested_vmx_vmexit(struct kvm_vcpu *vcpu)
        vcpu->cpu = cpu;
        put_cpu();
 
+       vmx_segment_cache_clear(vmx);
+
        /* if no vmcs02 cache requested, remove the one we used */
        if (VMCS02_POOL_SIZE == 0)
                nested_free_vmcs02(vmx, vmx->nested.current_vmptr);