Messages in this thread | | | Date | Wed, 21 Sep 2022 12:56:49 -0700 (PDT) | From | Ilkka Koskinen <> | Subject | Re: [PATCH 1/1] perf/arm-cmn: Add more bits to child node address offset field |
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Hi Robin,
On Wed, 21 Sep 2022, Robin Murphy wrote: > On 08/08/2022 8:54 pm, Ilkka Koskinen wrote: >> CMN-600 uses bits [27:0] for child node address offset while bits [30:28] >> are required to be zero. >> >> For CMN-650, the child node address offset field has been increased >> to include bits [29:0] while leaving only bit 30 set to zero. >> >> Let's include the missing two bits and assume older implementations >> comply with the spec and set bits [29:28] to 0. > > Just to add that other users have run into this as well, so getting it > applied as a fix would be just lovely. Technically I think it's: > > Fixes: 60d1504070c2 ("perf/arm-cmn: Support new IP features")
Ah, that's true. Should I resend the patch with your reviewed-by and the fixes lines?
Cheers, Ilkka
> > Cheers, > Robin. > >> Signed-off-by: Ilkka Koskinen <ilkka@os.amperecomputing.com> >> --- >> >> I have tested this patch on CMN-600 and CMN-650. >> >> drivers/perf/arm-cmn.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c >> index 80d8309652a4..b80a9b74662b 100644 >> --- a/drivers/perf/arm-cmn.c >> +++ b/drivers/perf/arm-cmn.c >> @@ -36,7 +36,7 @@ >> #define CMN_CI_CHILD_COUNT GENMASK_ULL(15, 0) >> #define CMN_CI_CHILD_PTR_OFFSET GENMASK_ULL(31, 16) >> -#define CMN_CHILD_NODE_ADDR GENMASK(27, 0) >> +#define CMN_CHILD_NODE_ADDR GENMASK(29, 0) >> #define CMN_CHILD_NODE_EXTERNAL BIT(31) >> #define CMN_MAX_DIMENSION 12 >
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