User space (i.e. QEMU) should be able to check whether KVM supports apic-v. User space will use this to decide whether enable emulated MSR-based APIC (i.e. hyperv-vapic).
Signed-off-by: zhanghailiang <[email protected]> --- arch/x86/kvm/x86.c | 6 ++++++ include/uapi/linux/kvm.h | 1 + 2 files changed, 7 insertions(+) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 0033df3..aad4437 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2775,6 +2775,12 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_TSC_DEADLINE_TIMER: r = boot_cpu_has(X86_FEATURE_TSC_DEADLINE_TIMER); break; + case KVM_CAP_VMX_APICV: + if (kvm) + r = kvm_apic_vid_enabled(kvm); + else + r = 0; + break; default: r = 0; break; diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 6076882..1a55d1a 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -761,6 +761,7 @@ struct kvm_ppc_smmu_info { #define KVM_CAP_PPC_FIXUP_HCALL 103 #define KVM_CAP_PPC_ENABLE_HCALL 104 #define KVM_CAP_CHECK_EXTENSION_VM 105 +#define KVM_CAP_VMX_APICV 106 #ifdef KVM_CAP_IRQ_ROUTING -- 1.8.3.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
