Re: Should SEV-ES #VC use IST? (Re: [PATCH] Allow RDTSC and RDTSCP from userspace)

[Dave Hansen]

On 6/23/20 8:52 AM, Peter Zijlstra wrote:
> Isn't current #MC unconditionally fatal from kernel? But yes, I was
> sorta aware people want that changed.

Not unconditionally.  copy_to_iter_mcsafe() is a good example of one
thing we _can_ handle.