From: Shaokun Zhang Date: Thu, 19 Jul 2018 11:26:40 +0000 (+0800) Subject: drivers/perf: hisi: update the sccl_id/ccl_id when MT is supported X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=06060ea7fb5b6b9b4c3251e0dcabbcca8ad91674;p=linux.git drivers/perf: hisi: update the sccl_id/ccl_id when MT is supported MT bit in MPIDR_EL1 is now supported in certain HiSilicon platforms, so the mapping between sccl_id/ccl_id and affinity level needs to be updated from the generic encoding we originally used. Cc: John Garry Cc: Will Deacon Cc: Mark Rutland Signed-off-by: Shaokun Zhang [will: fixed comment] Signed-off-by: Will Deacon --- diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c index 44df61397a380..9efd2413240cb 100644 --- a/drivers/perf/hisilicon/hisi_uncore_pmu.c +++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c @@ -350,19 +350,21 @@ void hisi_uncore_pmu_disable(struct pmu *pmu) /* * Read Super CPU cluster and CPU cluster ID from MPIDR_EL1. - * If multi-threading is supported, SCCL_ID is in MPIDR[aff3] and CCL_ID - * is in MPIDR[aff2]; if not, SCCL_ID is in MPIDR[aff2] and CCL_ID is - * in MPIDR[aff1]. If this changes in future, this shall be updated. + * If multi-threading is supported, CCL_ID is the low 3-bits in MPIDR[Aff2] + * and SCCL_ID is the upper 5-bits of Aff2 field; if not, SCCL_ID + * is in MPIDR[Aff2] and CCL_ID is in MPIDR[Aff1]. */ static void hisi_read_sccl_and_ccl_id(int *sccl_id, int *ccl_id) { u64 mpidr = read_cpuid_mpidr(); if (mpidr & MPIDR_MT_BITMASK) { + int aff2 = MPIDR_AFFINITY_LEVEL(mpidr, 2); + if (sccl_id) - *sccl_id = MPIDR_AFFINITY_LEVEL(mpidr, 3); + *sccl_id = aff2 >> 3; if (ccl_id) - *ccl_id = MPIDR_AFFINITY_LEVEL(mpidr, 2); + *ccl_id = aff2 & 0x7; } else { if (sccl_id) *sccl_id = MPIDR_AFFINITY_LEVEL(mpidr, 2);