From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 54605EB64D9 for ; Mon, 10 Jul 2023 09:28:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230280AbjGJJ2P (ORCPT ); Mon, 10 Jul 2023 05:28:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49560 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229969AbjGJJ2G (ORCPT ); Mon, 10 Jul 2023 05:28:06 -0400 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1AB6A9B; Mon, 10 Jul 2023 02:28:05 -0700 (PDT) Received: from pps.filterd (m0353722.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36A9Gga5022745; Mon, 10 Jul 2023 09:27:59 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=WFD7tw0elZ5OgUIsbPNKtzMLMoVvQP2bl7ptCFKevM4=; b=pc5kEXPgu7dg4tzeyMVnJx9J9ObAJPKfwwibEmmtLIyNBc6ECWUvZZUSyKF2kylAzAdB ndFa2MvoCiWR9hDBvgCbGEc0o2AbL2MnIKLdUkSzxRItAm50TOn8lkCDvj/QvhEFxKfM nQA04StTfSxAHktnCBcGWSrpIx5TzI//3JfhdyIw0qW6dFbgqvL/+XdUnGDsvbZDiuxN Z+GQB0/CsKHGJhDfYGIM20R2t3mEYcSt2je+t60SpdvfgkqoM+ztd/6kJwnDY3UAvO/+ Qfo9VS+dEfHEnVxn1OBMjZ2BJ9uQUyp7YEZeiGIDQHUVpyIPoQ9VcaXbfaWjZlXzhCcg sA== Received: from ppma04ams.nl.ibm.com (63.31.33a9.ip4.static.sl-reverse.com [169.51.49.99]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3rrf7dg7tq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 10 Jul 2023 09:27:58 +0000 Received: from pps.filterd (ppma04ams.nl.ibm.com [127.0.0.1]) by ppma04ams.nl.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 36A5wTr2004561; Mon, 10 Jul 2023 09:27:57 GMT Received: from smtprelay01.fra02v.mail.ibm.com ([9.218.2.227]) by ppma04ams.nl.ibm.com (PPS) with ESMTPS id 3rpye5954e-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 10 Jul 2023 09:27:56 +0000 Received: from smtpav03.fra02v.mail.ibm.com (smtpav03.fra02v.mail.ibm.com [10.20.54.102]) by smtprelay01.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 36A9Rr1P21824168 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 10 Jul 2023 09:27:53 GMT Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7372C2004B; Mon, 10 Jul 2023 09:27:53 +0000 (GMT) Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2146820040; Mon, 10 Jul 2023 09:27:51 +0000 (GMT) Received: from li-e8dccbcc-2adc-11b2-a85c-bc1f33b9b810.ibm.com.com (unknown [9.43.85.154]) by smtpav03.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 10 Jul 2023 09:27:50 +0000 (GMT) From: Kajol Jain To: mpe@ellerman.id.au Cc: linuxppc-dev@lists.ozlabs.org, maddy@linux.ibm.com, atrajeev@linux.vnet.ibm.com, disgoel@linux.ibm.com, kjain@linux.ibm.com, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 07/10] powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show affinity domain via domain information Date: Mon, 10 Jul 2023 14:57:14 +0530 Message-Id: <20230710092717.55317-8-kjain@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230710092717.55317-1-kjain@linux.ibm.com> References: <20230710092717.55317-1-kjain@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: z_abQ0sXlwGjDerv9Rli6fZ_g4fmjE8N X-Proofpoint-ORIG-GUID: z_abQ0sXlwGjDerv9Rli6fZ_g4fmjE8N X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-10_07,2023-07-06_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 spamscore=0 suspectscore=0 bulkscore=0 priorityscore=1501 lowpriorityscore=0 clxscore=1015 phishscore=0 malwarescore=0 mlxlogscore=999 adultscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2307100082 Precedence: bulk List-ID: X-Mailing-List: linux-perf-users@vger.kernel.org The hcall H_GET_PERF_COUNTER_INFO with counter request value as AFFINITY_DOMAIN_INFORMATION_BY_DOMAIN(0XB0), can be used to get the system affinity domain via domain information. To expose the system affinity domain via domain information, patch adds sysfs file called "affinity_domain_via_domain" to the "/sys/devices/hv_gpci/interface/" of hv_gpci pmu driver. Add new entry for AFFINITY_DOMAIN_VIA_DOM in sysinfo_counter_request array, which points to the counter request value "affinity_domain_via_domain" in hv-gpci.c file. The affinity_domain_via_domain sysfs file is only available for power10 and above platforms. Add a macro called INTERFACE_AFFINITY_DOMAIN_VIA_DOM_ATTR, which points to the index of NULL placeholder, for affinity_domain_via_domain attribute in interface_attrs array. Also updated the value of INTERFACE_NULL_ATTR macro in hv-gpci.c file. Signed-off-by: Kajol Jain --- arch/powerpc/perf/hv-gpci.c | 80 ++++++++++++++++++++++++++++++++++++- 1 file changed, 79 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/perf/hv-gpci.c b/arch/powerpc/perf/hv-gpci.c index 68502cb18262..326b758df7c8 100644 --- a/arch/powerpc/perf/hv-gpci.c +++ b/arch/powerpc/perf/hv-gpci.c @@ -106,19 +106,22 @@ static ssize_t cpumask_show(struct device *dev, #define INTERFACE_PROCESSOR_BUS_TOPOLOGY_ATTR 6 #define INTERFACE_PROCESSOR_CONFIG_ATTR 7 #define INTERFACE_AFFINITY_DOMAIN_VIA_VP_ATTR 8 -#define INTERFACE_NULL_ATTR 9 +#define INTERFACE_AFFINITY_DOMAIN_VIA_DOM_ATTR 9 +#define INTERFACE_NULL_ATTR 10 /* Counter request value to retrieve system information */ enum { PROCESSOR_BUS_TOPOLOGY, PROCESSOR_CONFIG, AFFINITY_DOMAIN_VIA_VP, /* affinity domain via virtual processor */ + AFFINITY_DOMAIN_VIA_DOM, /* affinity domain via domain */ }; static int sysinfo_counter_request[] = { [PROCESSOR_BUS_TOPOLOGY] = 0xD0, [PROCESSOR_CONFIG] = 0x90, [AFFINITY_DOMAIN_VIA_VP] = 0xA0, + [AFFINITY_DOMAIN_VIA_DOM] = 0xB0, }; static DEFINE_PER_CPU(char, hv_gpci_reqb[HGPCI_REQ_BUFFER_SIZE]) __aligned(sizeof(uint64_t)); @@ -389,6 +392,72 @@ static ssize_t affinity_domain_via_virtual_processor_show(struct device *dev, return ret; } +static ssize_t affinity_domain_via_domain_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct hv_gpci_request_buffer *arg; + unsigned long ret; + size_t n = 0; + + arg = (void *)get_cpu_var(hv_gpci_reqb); + memset(arg, 0, HGPCI_REQ_BUFFER_SIZE); + + /* + * Pass the counter request 0xB0 corresponds to request + * type 'Affinity_domain_information_by_domain', + * to retrieve the system affinity domain information. + * starting_index value refers to the starting hardware + * processor index. + */ + ret = systeminfo_gpci_request(sysinfo_counter_request[AFFINITY_DOMAIN_VIA_DOM], + 0, 0, buf, &n, arg); + + if (!ret) + return n; + + if (ret != H_PARAMETER) + goto out; + + /* + * ret value as 'H_PARAMETER' corresponds to 'GEN_BUF_TOO_SMALL', which + * implies that buffer can't accommodate all information, and a partial buffer + * returned. To handle that, we need to take subsequent requests + * with next starting index to retrieve additional (missing) data. + * Below loop do subsequent hcalls with next starting index and add it + * to buffer util we get all the information. + */ + while (ret == H_PARAMETER) { + int returned_values = be16_to_cpu(arg->params.returned_values); + int elementsize = be16_to_cpu(arg->params.cv_element_size); + int last_element = (returned_values - 1) * elementsize; + + /* + * Since the starting index value is part of counter_value + * buffer elements, use the starting index value in the last + * element and add 1 to make subsequent hcalls. + */ + u32 starting_index = arg->bytes[last_element + 1] + + (arg->bytes[last_element] << 8) + 1; + + memset(arg, 0, HGPCI_REQ_BUFFER_SIZE); + + ret = systeminfo_gpci_request(sysinfo_counter_request[AFFINITY_DOMAIN_VIA_DOM], + starting_index, 0, buf, &n, arg); + + if (!ret) + return n; + + if (ret != H_PARAMETER) + goto out; + } + + return n; + +out: + put_cpu_var(hv_gpci_reqb); + return ret; +} + static DEVICE_ATTR_RO(kernel_version); static DEVICE_ATTR_RO(cpumask); @@ -420,6 +489,11 @@ static struct attribute *interface_attrs[] = { * attribute, set in init function if applicable. */ NULL, + /* + * This NULL is a placeholder for the affinity_domain_via_domain + * attribute, set in init function if applicable. + */ + NULL, NULL, }; @@ -677,6 +751,10 @@ static struct device_attribute *sysinfo_device_attr_create(int attr->attr.name = "affinity_domain_via_virtual_processor"; attr->show = affinity_domain_via_virtual_processor_show; break; + case INTERFACE_AFFINITY_DOMAIN_VIA_DOM_ATTR: + attr->attr.name = "affinity_domain_via_domain"; + attr->show = affinity_domain_via_domain_show; + break; } } else pr_devel("hcall failed, with error: 0x%lx\n", ret); -- 2.31.1