From: Robin Murphy Date: Mon, 2 Sep 2024 17:51:58 +0000 (+0100) Subject: perf/arm-cmn: Fix CCLA register offset X-Git-Tag: v6.12-rc1~221^2~4^2~13 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=88b63a82c84ed9bbcbdefb10cb6f75dd1dd04887;p=thirdparty%2Fkernel%2Flinux.git perf/arm-cmn: Fix CCLA register offset Apparently pmu_event_sel is offset by 8 for all CCLA nodes, not just the CCLA_RNI combination type. Fixes: 23760a014417 ("perf/arm-cmn: Add CMN-700 support") Acked-by: Mark Rutland Reviewed-by: Ilkka Koskinen Signed-off-by: Robin Murphy Link: https://lore.kernel.org/r/6e7bb06fef6046f83e7647aad0e5be544139763f.1725296395.git.robin.murphy@arm.com Signed-off-by: Will Deacon --- diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c index b59ae8513dcee..4e2338afe6694 100644 --- a/drivers/perf/arm-cmn.c +++ b/drivers/perf/arm-cmn.c @@ -70,7 +70,8 @@ /* Technically this is 4 bits wide on DNs, but we only use 2 there anyway */ #define CMN__PMU_OCCUP1_ID GENMASK_ULL(34, 32) -/* HN-Ps are weird... */ +/* Some types are designed to coexist with another device in the same node */ +#define CMN_CCLA_PMU_EVENT_SEL 0x008 #define CMN_HNP_PMU_EVENT_SEL 0x008 /* DTMs live in the PMU space of XP registers */ @@ -2393,10 +2394,13 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset) case CMN_TYPE_CXHA: case CMN_TYPE_CCRA: case CMN_TYPE_CCHA: - case CMN_TYPE_CCLA: case CMN_TYPE_HNS: dn++; break; + case CMN_TYPE_CCLA: + dn->pmu_base += CMN_CCLA_PMU_EVENT_SEL; + dn++; + break; /* Nothing to see here */ case CMN_TYPE_MPAM_S: case CMN_TYPE_MPAM_NS: @@ -2414,7 +2418,7 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset) case CMN_TYPE_HNP: case CMN_TYPE_CCLA_RNI: dn[1] = dn[0]; - dn[0].pmu_base += CMN_HNP_PMU_EVENT_SEL; + dn[0].pmu_base += CMN_CCLA_PMU_EVENT_SEL; dn[1].type = arm_cmn_subtype(dn->type); dn += 2; break;