| Message ID | 1466808476-32690-6-git-send-email-benh@kernel.crashing.org |
|---|---|
| State | Accepted |
| Headers | show |
On Sat, 2016-06-25 at 08:47 +1000, Benjamin Herrenschmidt wrote: > To access a local CPU number within a chip essentially, will be > used by XIVE > > Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Michael Neuling <mikey@neuling.org> > --- > include/chip.h | 10 +++++++++- > 1 file changed, 9 insertions(+), 1 deletion(-) > > diff --git a/include/chip.h b/include/chip.h > index 463cce3..0038814 100644 > --- a/include/chip.h > +++ b/include/chip.h > @@ -87,7 +87,10 @@ > * | | | > * |___|___|___|___|___|___|___| > * > - * Bit 56 is unused according to the manual by we add it to the coreid > here. > + * Bit 56 is unused according to the manual by we add it to the coreid > here, > + * thus we have a 6-bit core number. > + * > + * Note: XIVE Only supports 4-bit chip numbers ... > */ > #define P9_PIR2GCID(pir) (((pir) >> 8) & 0x7f) > > @@ -95,6 +98,11 @@ > > #define P9_PIR2THREADID(pir) ((pir) & 0x3) > > +/* P9 specific ones mostly used by XIVE */ > +#define P9_PIR2LOCALCPU(pir) ((pir) & 0xff) > +#define P9_PIRFROMLOCALCPU(chip, cpu) (((chip) << 8) | (cpu)) > + > + > struct dt_node; > struct centaur_chip; > struct mfsi;
diff --git a/include/chip.h b/include/chip.h index 463cce3..0038814 100644 --- a/include/chip.h +++ b/include/chip.h @@ -87,7 +87,10 @@ * | | | * |___|___|___|___|___|___|___| * - * Bit 56 is unused according to the manual by we add it to the coreid here. + * Bit 56 is unused according to the manual by we add it to the coreid here, + * thus we have a 6-bit core number. + * + * Note: XIVE Only supports 4-bit chip numbers ... */ #define P9_PIR2GCID(pir) (((pir) >> 8) & 0x7f) @@ -95,6 +98,11 @@ #define P9_PIR2THREADID(pir) ((pir) & 0x3) +/* P9 specific ones mostly used by XIVE */ +#define P9_PIR2LOCALCPU(pir) ((pir) & 0xff) +#define P9_PIRFROMLOCALCPU(chip, cpu) (((chip) << 8) | (cpu)) + + struct dt_node; struct centaur_chip; struct mfsi;
To access a local CPU number within a chip essentially, will be used by XIVE Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> --- include/chip.h | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)