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authorJan Kiszka <jan.kiszka@siemens.com>2013-04-14 12:12:50 +0200
committerGleb Natapov <gleb@redhat.com>2013-04-14 18:27:10 +0300
commitc0d1c770c05ac7051df86914f9627b68f29c1d67 (patch)
treee33fd8d4e5728b1afec04f6ec62d3649e32781b5
parente8457c67a4ec1268ec616bd8be1d9f1cc20f1493 (diff)
downloadlinaro-lsk-c0d1c770c05ac7051df86914f9627b68f29c1d67.tar.gz
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>
-rw-r--r--arch/x86/kvm/vmx.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 5e639111227..71755573b7c 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -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);