Re: [PATCH v5 08/11] powerpc/powernv: Add platform support for stop instruction

Hi Ben,

Sorry for the delayed response.

On 06/06/2016 03:58 AM, Benjamin Herrenschmidt wrote:

On Thu, 2016-06-02 at 07:38 -0500, Shreyas B. Prabhu wrote:

quoted

@@ -61,8 +72,13 @@ save_sprs_to_stack:
         * Note all register i.e per-core, per-subcore or per-thread is saved
         * here since any thread in the core might wake up first
         */
+BEGIN_FTR_SECTION
+       mfspr   r3,SPRN_PTCR
+       std     r3,_PTCR(r1)
+FTR_SECTION_ELSE
        mfspr   r3,SPRN_SDR1
        std     r3,_SDR1(r1)
+ALT_FTR_SECTION_END_IFSET(CPU_FTR_ARCH_300)

This is the only new SPR we care about in P9 ?

After reviewing ISA again, I've identified LMRR, LMSER and ASDR also
need to be restored. I've fixed this in v6.

Thanks,
Shreyas