On Thu, May 30, 2019 at 12:17:18PM +1000, Suraj Jitindar Singh wrote:
> The sprgs are a set of 4 general purpose sprs provided for software use.
> SPRG3 is special in that it can also be read from userspace. Thus it is
> used on linux to store the cpu and numa id of the process to speed up
> syscall access to this information.
>
> This register is overwritten with the guest value on kvm guest entry,
> and so needs to be restored on exit again. Thus restore the value on
> the guest exit path in kvmhv_p9_guest_entry().
>
> Fixes: 95a6432ce9038 ("KVM: PPC: Book3S HV: Streamlined guest entry/exit path on P9 for radix guests")
>
> Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@xxxxxxxxx>
Thanks, patch applied to my kvm-ppc-fixes branch.
Paul.
