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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Nov 07, 2019 at 11:50:30AM +0000, John Garry wrote: > On 07/11/2019 11:40, Will Deacon wrote: > > Hi, > > > > On Thu, Nov 07, 2019 at 03:56:04PM +0800, Shaokun Zhang wrote: > > > @@ -338,8 +339,10 @@ void hisi_uncore_pmu_disable(struct pmu *pmu) > > > /* > > > * Read Super CPU cluster and CPU cluster ID from MPIDR_EL1. > > > - * 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 > > > + * If multi-threading is supported, On Huawei Kunpeng 920 SoC whose cpu > > > + * core is tsv110, CCL_ID is the low 3-bits in MPIDR[Aff2] and SCCL_ID > > > + * is the upper 5-bits of Aff2 field; while for other cpu types, 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]. > > > */ > > > static void hisi_read_sccl_and_ccl_id(int *sccl_id, int *ccl_id) > > > @@ -347,12 +350,19 @@ 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 = aff2 >> 3; > > > - if (ccl_id) > > > - *ccl_id = aff2 & 0x7; > > > + if (read_cpuid_part_number() == HISI_CPU_PART_TSV110) { > > > + int aff2 = MPIDR_AFFINITY_LEVEL(mpidr, 2); > > > + > > > + if (sccl_id) > > > + *sccl_id = aff2 >> 3; > > > + if (ccl_id) > > > + *ccl_id = aff2 & 0x7; > > > + } else { > > > + if (sccl_id) > > > + *sccl_id = MPIDR_AFFINITY_LEVEL(mpidr, 3); > > > + if (ccl_id) > > > + *ccl_id = MPIDR_AFFINITY_LEVEL(mpidr, 2); > > > + } > > > > [I prefer Mark's version, so please reply to indicate whether or not it > > works for you] > > Replying on Shaokun's behalf as he appears offline now. > > In response to "> If TSV110 is always MT, ": > > It isn't. There are 2 spins of Huawei Kunpeng 920 SoC which includes > TaishanV110 aka TSV110: one has the MT bit set and the other without. Just to check, for the non-MT variant is the SCCL/CCL assignment Aff2/Aff1 as with other non-MT parts? Thanks, Mark. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel