Messages in this thread | | | Date | Fri, 20 Feb 2015 19:30:34 +0000 | From | Will Deacon <> | Subject | Re: [PATCH v2 1/2] ARM: perf: Preparatory work for Scorpion PMU support |
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On Fri, Feb 13, 2015 at 06:24:08PM +0000, Stephen Boyd wrote: > Do some things to make the Krait PMU support code generic enough > to be used by the Scorpion PMU support code. > > * Rename the venum register functions to be venum instead of krait > specific because the same registers exist on Scorpion > > * Add a krait_decode_event() function to decode our Krait specific > event encoding that's the same on Scorpion (modulo an extra region). > > * Drop krait from krait_clear_pmresrn_group() so it can be used > by Scorpion code > > Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> > --- > arch/arm/kernel/perf_event_v7.c | 87 ++++++++++++++++++++++------------------- > 1 file changed, 46 insertions(+), 41 deletions(-)
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> +static void krait_decode_event(u32 event, unsigned int *region, > + unsigned int *group, unsigned int *code, bool *venum, bool *cpu) > +{ > + if (region) > + *region = (event >> 12) & 0xf; > + if (group) > + *group = (event >> 0) & 0xf; > + if (code) > + *code = (event >> 4) & 0xff; > + if (venum) > + *venum = !!(event & VENUM_EVENT); > + if (cpu) > + *cpu = !!(event & KRAIT_EVENT); > +}
Maybe worth sticking these fields in a struct? Failing that, just using macros for each one and using them in-line isn't so bad.
Will
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