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KVM: x86: Clean up handle_emulation_failure() 

When handling emulation failure, return the emulation result directly
instead of capturing it in a local variable.  Future patches will move
additional cases into handle_emulation_failure(), clean up the cruft
before so there isn't an ugly mix of setting a local variable and
returning directly.

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2019-08-27 14:40:28 -07:00 committed by Paolo Bonzini
parent bc8a0aafcb
commit 22da61c912
1 changed files with 4 additions and 6 deletions
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10
arch/x86/kvm/x86.c
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@ -6304,24 +6304,22 @@ EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt);
static int handle_emulation_failure(struct kvm_vcpu *vcpu, int emulation_type)
{
int r = EMULATE_DONE;
++vcpu->stat.insn_emulation_fail;
trace_kvm_emulate_insn_failed(vcpu);
if (emulation_type & EMULTYPE_NO_UD_ON_FAIL)
return EMULATE_FAIL;
kvm_queue_exception(vcpu, UD_VECTOR);
if (!is_guest_mode(vcpu) && kvm_x86_ops->get_cpl(vcpu) == 0) {
vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
vcpu->run->internal.ndata = 0;
r = EMULATE_USER_EXIT;
return EMULATE_USER_EXIT;
}
kvm_queue_exception(vcpu, UD_VECTOR);
return r;
return EMULATE_DONE;
}
static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2,