I haven't seen a /dev/msr before, but there is /dev/cpu/*/msr [1] provided by a kernel module. So there is a generic interface for them, but it's still all ha

I haven't seen a /dev/msr before, but there is /dev/cpu/*/msr [1] provided by a kernel module. So there is a generic interface for them, but it's still all happening in kernel space. It's also not loaded by default either because it can cause system panics and corruption. [1] http://man7.org/linux/man-pages/man4/msr.4.html http://man7.org/linux/man-pages/man4/msr.4.html