On 04.05.2013 [09:23:51 +1000], Benjamin Herrenschmidt wrote: > On Fri, 2013-05-03 at 16:19 -0700, Nishanth Aravamudan wrote: > > +/* in AT_HWCAP2 */ > > +#define PPC_FEATURE2_ARCH_2_07 0x80000000 > > +#define PPC_FEATURE2_HTM 0x40000000 > > +#define PPC_FEATURE2_DSCR 0x20000000 > > +#define PPC_FEATURE2_EBB 0x10000000 > > +#define PPC_FEATURE2_ISEL 0x08000000 > > Should we "adjust" (ie filter out) some of these based > on CONFIG_ options (such as transactional memory enabled, > EBB supported by the hypervisor, etc...) ?
Err, yeah, that seems reasonable :) However, it seems like glibc uses these values rather directly so it knows what bits to check for each feature. Therefore, it seems like it would be better to do the ifdeffery/checking in the user in cputable.c, but that seems like it could get quite complicated. Would it be ok (I guess I'm asking Ryan & co. here) to have an #ifdef in the definition that may or may not mean the bit is set in the aux vector, but the bit, if set, would always be the same bit? -Nish _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
