commit 9497e1f2ec93f0c8a7832c3c1eb3af8159800cd8
author Sean Christopherson <sean.j.christopherson@intel.com> Tue Aug 27 14:40:36 2019 -0700
committer Paolo Bonzini <pbonzini@redhat.com> Tue Sep 24 14:31:20 2019 +0200
tree fc6de84b0dd73dab868e3712374dd00f84cb8125
parent 1051778f6e1e25c1203869586f4431785a35c13c

KVM: x86: Move triple fault request into RM int injection

Request triple fault in kvm_inject_realmode_interrupt() instead of
returning EMULATE_FAIL and deferring to the caller.  All existing
callers request triple fault and it's highly unlikely Real Mode is
going to acquire new features.  While this consolidates a small amount
of code, the real goal is to remove the last reference to EMULATE_FAIL.

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/x86.c

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index bdee7e3..92b6690 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6273,7 +6273,7 @@ static void init_emulate_ctxt(struct kvm_vcpu *vcpu)
 	vcpu->arch.emulate_regs_need_sync_from_vcpu = false;
 }
 
-int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip)
+void kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip)
 {
 	struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
 	int ret;
@@ -6285,14 +6285,13 @@ int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip)
 	ctxt->_eip = ctxt->eip + inc_eip;
 	ret = emulate_int_real(ctxt, irq);
 
-	if (ret != X86EMUL_CONTINUE)
-		return EMULATE_FAIL;
-
-	ctxt->eip = ctxt->_eip;
-	kvm_rip_write(vcpu, ctxt->eip);
-	kvm_set_rflags(vcpu, ctxt->eflags);
-
-	return EMULATE_DONE;
+	if (ret != X86EMUL_CONTINUE) {
+		kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
+	} else {
+		ctxt->eip = ctxt->_eip;
+		kvm_rip_write(vcpu, ctxt->eip);
+		kvm_set_rflags(vcpu, ctxt->eflags);
+	}
 }
 EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt);