KVM_HYPERV_EVENTFD 1449 include/uapi/linux/kvm.h #define KVM_HYPERV_EVENTFD        _IOW(KVMIO,  0xbd, struct kvm_hyperv_eventfd)
KVM_HYPERV_EVENTFD 1449 tools/include/uapi/linux/kvm.h #define KVM_HYPERV_EVENTFD        _IOW(KVMIO,  0xbd, struct kvm_hyperv_eventfd)