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KVM: VMX: Refactor vmx_complete_atomic_exit()

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Move the exit reason checks to the front of the function, for early
exit in the common case.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2011-03-07 17:24:54 +02:00
parent f9902069c4
commit 00eba012d5
1 changed files with 9 additions and 6 deletions
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15
arch/x86/kvm/vmx.c
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@ -3896,17 +3896,20 @@ static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx) static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx)
{ {
u32 exit_intr_info = vmx->exit_intr_info; u32 exit_intr_info;
if (!(vmx->exit_reason == EXIT_REASON_MCE_DURING_VMENTRY
|| vmx->exit_reason == EXIT_REASON_EXCEPTION_NMI))
return;
exit_intr_info = vmx->exit_intr_info;
/* Handle machine checks before interrupts are enabled */ /* Handle machine checks before interrupts are enabled */
if ((vmx->exit_reason == EXIT_REASON_MCE_DURING_VMENTRY) if (is_machine_check(exit_intr_info))
|| (vmx->exit_reason == EXIT_REASON_EXCEPTION_NMI
&& is_machine_check(exit_intr_info)))
kvm_machine_check(); kvm_machine_check();
/* We need to handle NMIs before interrupts are enabled */ /* We need to handle NMIs before interrupts are enabled */
if (vmx->exit_reason == EXIT_REASON_EXCEPTION_NMI && if ((exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR &&
(exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR &&
(exit_intr_info & INTR_INFO_VALID_MASK)) { (exit_intr_info & INTR_INFO_VALID_MASK)) {
kvm_before_handle_nmi(&vmx->vcpu); kvm_before_handle_nmi(&vmx->vcpu);
asm("int $2"); asm("int $2");