[19/27] KVM: X86: Propagate fetch faults

Commit Message

Joerg Roedel Sept. 6, 2010, 3:55 p.m. UTC

None

Patch

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 2b08b78..aead72e 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -1198,6 +1198,9 @@  static int emulate_popf(struct x86_emulate_ctxt *ctxt,
 	*(unsigned long *)dest =
 		(ctxt->eflags & ~change_mask) | (val & change_mask);
 
+	if (rc == X86EMUL_PROPAGATE_FAULT)
+		emulate_pf(ctxt);
+
 	return rc;
 }
 
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 65b00f0..ca69dcc 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4237,6 +4237,9 @@  int emulate_instruction(struct kvm_vcpu *vcpu,
 		vcpu->arch.emulate_ctxt.perm_ok = false;
 
 		r = x86_decode_insn(&vcpu->arch.emulate_ctxt);
+		if (r == X86EMUL_PROPAGATE_FAULT)
+			goto done;
+
 		trace_kvm_emulate_insn_start(vcpu);
 
 		/* Only allow emulation of specific instructions on #UD
@@ -4295,6 +4298,7 @@  restart:
 		return handle_emulation_failure(vcpu);
 	}
 
+done:
 	if (vcpu->arch.emulate_ctxt.exception >= 0) {
 		inject_emulated_exception(vcpu);
 		r = EMULATE_DONE;