NVMM_VCPU_CONF_CALLBACKS
case NVMM_VCPU_CONF_CALLBACKS:
ret = nvmm_vcpu_configure(mach, vcpu, NVMM_VCPU_CONF_CALLBACKS,
nvmm_vcpu_configure(&mach, &vcpu, NVMM_VCPU_CONF_CALLBACKS, &callbacks);
nvmm_vcpu_configure(&mach, &vcpu, NVMM_VCPU_CONF_CALLBACKS, &callbacks);
nvmm_vcpu_configure(&mach, &vcpu, NVMM_VCPU_CONF_CALLBACKS, &callbacks);