CPUCTL_WRMSR
cmd == CPUCTL_UPDATE || cmd == CPUCTL_WRMSR ||
case CPUCTL_WRMSR:
} else if (cmd == CPUCTL_WRMSR) {
command = CPUCTL_WRMSR;
error = ioctl(devfd, CPUCTL_WRMSR, &msrargs);