[PATCH] powerpc/64s: Fix restore of NV GPRs after facility unavailable exception

[Michael Ellerman]

On Tue, 26 May 2020 16:18:08 +1000, Michael Ellerman wrote:
> Commit 702f09805222 ("powerpc/64s/exception: Remove lite interrupt
> return") changed the interrupt return path to not restore non-volatile
> registers by default, and explicitly restore them in paths where it is
> required.
> 
> But it missed that the facility unavailable exception can sometimes
> modify user registers, ie. when it does emulation of move from DSCR.
> 
> [...]

Applied to powerpc/fixes.

[1/1] powerpc/64s: Fix restore of NV GPRs after facility unavailable exception
      https://git.kernel.org/powerpc/c/595d153dd1022392083ac93a1550382cbee127e0

cheers