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KVM: nVMX: Avoid reading VM_EXIT_INTR_ERROR_CODE needlessly on nested exits 

We only need to update vm_exit_intr_error_code if there is a valid exit
interruption information and it comes with a valid error code.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Jan Kiszka 2013-04-14 12:12:50 +02:00 committed by Gleb Natapov
parent e8457c67a4
commit c0d1c770c0
1 changed files with 5 additions and 1 deletions
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6
arch/x86/kvm/vmx.c
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@ -7426,7 +7426,11 @@ static void prepare_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
vmcs12->exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
vmcs12->vm_exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
vmcs12->vm_exit_intr_error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
if ((vmcs12->vm_exit_intr_info &
(INTR_INFO_VALID_MASK | INTR_INFO_DELIVER_CODE_MASK)) ==
(INTR_INFO_VALID_MASK | INTR_INFO_DELIVER_CODE_MASK))
vmcs12->vm_exit_intr_error_code =
vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
vmcs12->idt_vectoring_info_field = 0;
vmcs12->vm_exit_instruction_len = vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
vmcs12->vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);