RE: [tip: ras/core] x86/mce: Enable additional error logging on certain Intel CPUs

[Luck, Tony]

> I thought Linux had long ago gone the route of turning rdmsr/wrmsr
> into rdmsr_safe/wrmsr_safe, so that the guest would ignore the #GPs on
> writes and return zero to the caller for #GPs on reads.

Linux just switched that around for the machine check banks ... if they #GP
fault, then something is seriously wrong.

Maybe that isn't a general change of direction though. Perhaps I
should either use rdmsrl_safe() in this code. Or (better?) add

	if (boot_cpu_has(X86_FEATURE_HYPERVISOR))
		return;

to the start of intel_imc_init().

-Tony