Segher Boessenkool's on June 23, 2019 10:03 pm: > On Sun, Jun 23, 2019 at 08:41:51PM +1000, Nicholas Piggin wrote: >> This makes it clear to the caller that it can only be used on POWER9 >> and later CPUs. > >> -#define PPC_INVALIDATE_ERAT PPC_SLBIA(7) >> +#define PPC_ARCH_300_INVALIDATE_ERAT PPC_SLBIA(7) > > The architecture version is 3.0 (or 3.0B), not "300". This will work on > implementations of later architecture versions as well, so maybe the name > isn't so great anyway? Yeah... this is kernel convention for better or worse. ISA v3.0B feature support is called CPU_FTR_ARCH_300, and later architectures will advertise that support. For the most part we can use architected features (incompatible changes would require additional code). Thanks, Nick
