On Tue, 20 Sep 2016 14:25:48 +1000
Michael Ellerman wrote:
> Nicholas Piggin writes:
>
> > mtmsrd with L=1 only affects MSR_EE and MSR_RI bits, and we always
> > know what state those bits are, so the kernel MSR does not need to be
> > loaded when modifying them.
> >
> > mtmsrd is often in the
Nicholas Piggin writes:
> mtmsrd with L=1 only affects MSR_EE and MSR_RI bits, and we always
> know what state those bits are, so the kernel MSR does not need to be
> loaded when modifying them.
>
> mtmsrd is often in the critical execution path, so avoiding dependency
> on even L1 load is notica
