[PATCH] powerpc: Fix definition of SIAR register

Paul Mackerras paulus at ozlabs.org
Thu May 12 20:40:17 AEST 2016

On Thu, May 12, 2016 at 09:27:40AM +0200, Thomas Huth wrote:
> On 12.05.2016 06:57, Paul Mackerras wrote:
> > On Mon, Apr 25, 2016 at 10:15:47AM +0200, Alexander Graf wrote:
> >>
> >>>> +#define SPRN_SIAR    796
> >>
> >> I'm sure there's a reason (iSeries?) we used the r/o version before. Better introduce a new constant that gives us rw access and use that in the kvm entry/exit code.
> > 
> > I don't think we ever did any performance monitoring on iSeries, and
> > in any case, we have removed the iSeries code.  I think we should just
> > use the privileged, read/write number (i.e. 796).
> Ok, then I'll simply add the fix for SDAR to my patch as well, test it
> and submit it again.

Great!  Could you switch MMCR2 to the privileged number as well while
you're at it?


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