On Tue, Nov 05, 2013 at 07:06:17AM +0100, Alexander Graf wrote: > > > Am 05.11.2013 um 04:53 schrieb Paul Mackerras <paulus@xxxxxxxxx>: > > > On Mon, Nov 04, 2013 at 01:53:36PM +0100, Alexander Graf wrote: > >> > >> On 06.09.2013, at 05:55, Paul Mackerras <paulus@xxxxxxxxx> wrote: > >> > >>> This allows us to select architecture 2.05 (POWER6) or 2.06 (POWER7) > >>> compatibility modes on a POWER8 processor. > >>> > >>> Signed-off-by: Paul Mackerras <paulus@xxxxxxxxx> > >>> --- > >>> arch/powerpc/include/asm/reg.h | 2 ++ > >>> arch/powerpc/kvm/book3s_hv.c | 16 +++++++++++++++- > >>> 2 files changed, 17 insertions(+), 1 deletion(-) > >>> > >>> diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h > >>> index 4ca8b85..483e0a2 100644 > >>> --- a/arch/powerpc/include/asm/reg.h > >>> +++ b/arch/powerpc/include/asm/reg.h > >>> @@ -315,6 +315,8 @@ > >>> #define SPRN_PCR 0x152 /* Processor compatibility register */ > >>> #define PCR_VEC_DIS (1ul << (63-0)) /* Vec. disable (pre POWER8) */ > >>> #define PCR_VSX_DIS (1ul << (63-1)) /* VSX disable (pre POWER8) */ > >>> +#define PCR_TM_DIS (1ul << (63-2)) /* Trans. memory disable (POWER8) */ > >> > >> Is this going to get used? > > > > Perhaps not, but I thought it worthwhile to document that the bit > > exists. > > But why not? Does that mean we allow TM to be used in p7 compat mode? No; TM is disabled if either or both of the PCR_TM_DIS and PCR_ARCH_206 bits are set. Paul. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
