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Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iSgYf-0006FI-Cz; Thu, 07 Nov 2019 12:06:37 +0000 Received: from lhrrgout.huawei.com ([185.176.76.210] helo=huawei.com) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iSgYb-0006EI-4r for linux-arm-kernel@lists.infradead.org; Thu, 07 Nov 2019 12:06:34 +0000 Received: from LHREML713-CAH.china.huawei.com (unknown [172.18.7.108]) by Forcepoint Email with ESMTP id 688E4500C01669F9E361; Thu, 7 Nov 2019 12:06:26 +0000 (GMT) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by LHREML713-CAH.china.huawei.com (10.201.108.36) with Microsoft SMTP Server (TLS) id 14.3.408.0; Thu, 7 Nov 2019 12:06:26 +0000 Received: from [127.0.0.1] (10.202.226.46) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.1713.5; Thu, 7 Nov 2019 12:06:25 +0000 Subject: Re: [PATCH] drivers/perf: hisi: update the sccl_id/ccl_id for certain HiSilicon platform To: Mark Rutland References: <1573113364-32531-1-git-send-email-zhangshaokun@hisilicon.com> <20191107114041.GB11587@willie-the-truck> <52f89b8c-0baf-77d0-4bbd-1e129f8e5ed2@huawei.com> <20191107115650.GA4948@lakrids.cambridge.arm.com> From: John Garry Message-ID: <14e778fb-7b71-3927-134a-415f9a83eae7@huawei.com> Date: Thu, 7 Nov 2019 12:06:24 +0000 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.1.2 MIME-Version: 1.0 In-Reply-To: <20191107115650.GA4948@lakrids.cambridge.arm.com> Content-Language: en-US X-Originating-IP: [10.202.226.46] X-ClientProxiedBy: lhreml703-chm.china.huawei.com (10.201.108.52) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191107_040633_332425_026CF367 X-CRM114-Status: GOOD ( 13.71 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Shaokun Zhang , Will Deacon , linux-arm-kernel@lists.infradead.org, Hanjun Guo Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 07/11/2019 11:56, Mark Rutland wrote: > 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? We don't support any other non-MT parts for this driver. Thanks, John _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel