KVM: nVMX: Check all exceptions for intercept during delivery to L2

All exceptions should be checked for intercept during delivery to L2,
but we check only #PF currently. Drop nested_run_pending while we are
at it since exception cannot be injected during vmentry anyway.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
[Renamed the nested_vmx_check_exception function. - Paolo]
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 4 insertions, 8 deletions

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 663bc5e4d7da..ac9ded4d4257 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -1898,16 +1898,12 @@ static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
 /*
  * KVM wants to inject page-faults which it got to the guest. This function
  * checks whether in a nested guest, we need to inject them to L1 or L2.
- * This function assumes it is called with the exit reason in vmcs02 being
- * a #PF exception (this is the only case in which KVM injects a #PF when L2
- * is running).
  */
-static int nested_pf_handled(struct kvm_vcpu *vcpu)
+static int nested_vmx_check_exception(struct kvm_vcpu *vcpu, unsigned nr)
 {
         struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
 
-        /* TODO: also check PFEC_MATCH/MASK, not just EB.PF. */
-        if (!(vmcs12->exception_bitmap & (1u << PF_VECTOR)))
+        if (!(vmcs12->exception_bitmap & (1u << nr)))
                 return 0;
 
         nested_vmx_vmexit(vcpu);
@@ -1921,8 +1917,8 @@ static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
         struct vcpu_vmx *vmx = to_vmx(vcpu);
         u32 intr_info = nr | INTR_INFO_VALID_MASK;
 
-        if (!reinject && nr == PF_VECTOR && is_guest_mode(vcpu) &&
-            !vmx->nested.nested_run_pending && nested_pf_handled(vcpu))
+        if (!reinject && is_guest_mode(vcpu) &&
+            nested_vmx_check_exception(vcpu, nr))
                 return;
 
         if (has_error_code) {