From patchwork Sat Jul 29 07:34:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kajol Jain X-Patchwork-Id: 1814479 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=112.213.38.117; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=gVkOQldf; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RCby52xS6z20G5 for ; Sat, 29 Jul 2023 17:40:13 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=gVkOQldf; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4RCby51mQcz3dFl for ; Sat, 29 Jul 2023 17:40:13 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=gVkOQldf; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=kjain@linux.ibm.com; receiver=lists.ozlabs.org) Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4RCbvJ5j1jz3d8D for ; Sat, 29 Jul 2023 17:37:48 +1000 (AEST) Received: from pps.filterd (m0353729.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36T7Vfms003017; Sat, 29 Jul 2023 07:35:21 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=Eez4ps/egQlGxI4EQPMwQ44jJGzglimRszD7GFVOFPE=; b=gVkOQldfISo3WcbJ4STWXz736we9ovP6tGBFFLv24AbcggFWvqEjSj8sCjV/FKa1Xksm TAt17BdR9W38asRn8xNh9dW3LA5iJZq9aKtp/11hCccoGSFCifmXpfKVItWFNaPdERcH KSqadugzKGDzj6tZBSrbpTohCiWTlDIBvEmbGrfr5DyYFS0bCdODPfXD2YKJ+zF8RCNW DSnrWmLljE2E2xRfB/Ag7x2/fYYC3JKFwXCJzXHTfwyYckMsOhLqk6fHCLbezBcFkC1V bP0/mG1DB9ddiszniWbbtdXQ1z/x7/f9GEC6dNL3Mh0DqdCedka2jIa/F41k3LH7pB+F 1g== Received: from ppma21.wdc07v.mail.ibm.com (5b.69.3da9.ip4.static.sl-reverse.com [169.61.105.91]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3s4xf085bc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:35:21 +0000 Received: from pps.filterd (ppma21.wdc07v.mail.ibm.com [127.0.0.1]) by ppma21.wdc07v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 36T77QeL002024; Sat, 29 Jul 2023 07:35:20 GMT Received: from smtprelay02.fra02v.mail.ibm.com ([9.218.2.226]) by ppma21.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3s0tenvrbg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:35:20 +0000 Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay02.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 36T7ZGi815336080 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 29 Jul 2023 07:35:16 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BB3532004E; Sat, 29 Jul 2023 07:35:16 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 64A7D20040; Sat, 29 Jul 2023 07:35:14 +0000 (GMT) Received: from li-e8dccbcc-2adc-11b2-a85c-bc1f33b9b810.ibm.com.com (unknown [9.171.60.192]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Sat, 29 Jul 2023 07:35:14 +0000 (GMT) From: Kajol Jain To: mpe@ellerman.id.au Subject: [PATCH v4 01/10] powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show processor bus topology information Date: Sat, 29 Jul 2023 13:04:46 +0530 Message-Id: <20230729073455.7918-2-kjain@linux.ibm.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20230729073455.7918-1-kjain@linux.ibm.com> References: <20230729073455.7918-1-kjain@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: QOREMBA5RQHskEx76Ih9xutBVDuTTW0l X-Proofpoint-GUID: QOREMBA5RQHskEx76Ih9xutBVDuTTW0l 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=2023-07-27_10,2023-07-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 spamscore=0 impostorscore=0 malwarescore=0 mlxlogscore=999 lowpriorityscore=0 mlxscore=0 phishscore=0 clxscore=1015 adultscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307290068 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: atrajeev@linux.vnet.ibm.com, kjain@linux.ibm.com, rdunlap@infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, maddy@linux.ibm.com, disgoel@linux.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" The hcall H_GET_PERF_COUNTER_INFO with counter request value as PROCESSOR_BUS_TOPOLOGY(0XD0), can be used to get the system topology information. To expose the system topology information, patch adds sysfs file called "processor_bus_topology" to the "/sys/devices/hv_gpci/interface/" of hv_gpci pmu driver. Add macro for PROCESSOR_BUS_TOPOLOGY counter request value in hv-gpci.c file. Also add a new function called "systeminfo_gpci_request", to make the H_GET_PERF_COUNTER_INFO hcall with added macro and populates the output buffer. The processor_bus_topology sysfs file is only available for power10 and above platforms. Add a new function called "add_sysinfo_interface_files", which will add processor_bus_topology attribute in the interface_attrs array, only for power10 and above platforms. Also add macro INTERFACE_PROCESSOR_BUS_TOPOLOGY_ATTR in hv-gpci.c file, which points to the index of NULL placefolder, for processor_bus_topology attribute. Reviewed-by: Athira Rajeev Signed-off-by: Kajol Jain --- arch/powerpc/perf/hv-gpci.c | 184 +++++++++++++++++++++++++++++++++++- 1 file changed, 182 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/perf/hv-gpci.c b/arch/powerpc/perf/hv-gpci.c index 7ff8ff3509f5..225f148f75fd 100644 --- a/arch/powerpc/perf/hv-gpci.c +++ b/arch/powerpc/perf/hv-gpci.c @@ -102,6 +102,141 @@ static ssize_t cpumask_show(struct device *dev, return cpumap_print_to_pagebuf(true, buf, &hv_gpci_cpumask); } +/* Counter request value to retrieve system information */ +#define PROCESSOR_BUS_TOPOLOGY 0XD0 + +/* Interface attribute array index to store system information */ +#define INTERFACE_PROCESSOR_BUS_TOPOLOGY_ATTR 6 + +static DEFINE_PER_CPU(char, hv_gpci_reqb[HGPCI_REQ_BUFFER_SIZE]) __aligned(sizeof(uint64_t)); + +static unsigned long systeminfo_gpci_request(u32 req, u32 starting_index, + u16 secondary_index, char *buf, + size_t *n, struct hv_gpci_request_buffer *arg) +{ + unsigned long ret; + size_t i, j; + + arg->params.counter_request = cpu_to_be32(req); + arg->params.starting_index = cpu_to_be32(starting_index); + arg->params.secondary_index = cpu_to_be16(secondary_index); + + ret = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO, + virt_to_phys(arg), HGPCI_REQ_BUFFER_SIZE); + + /* + * ret value as 'H_PARAMETER' corresponds to 'GEN_BUF_TOO_SMALL', + * which means that the current buffer size cannot accommodate + * all the information and a partial buffer returned. + * hcall fails incase of ret value other than H_SUCCESS or H_PARAMETER. + * + * ret value as H_AUTHORITY implies that partition is not permitted to retrieve + * performance information, and required to set + * "Enable Performance Information Collection" option. + */ + if (ret == H_AUTHORITY) + return -EPERM; + + /* + * hcall can fail with other possible ret value like H_PRIVILEGE/H_HARDWARE + * because of invalid buffer-length/address or due to some hardware + * error. + */ + if (ret && (ret != H_PARAMETER)) + return -EIO; + + /* + * hcall H_GET_PERF_COUNTER_INFO populates the 'returned_values' + * to show the total number of counter_value array elements + * returned via hcall. + * hcall also populates 'cv_element_size' corresponds to individual + * counter_value array element size. Below loop go through all + * counter_value array elements as per their size and add it to + * the output buffer. + */ + for (i = 0; i < be16_to_cpu(arg->params.returned_values); i++) { + j = i * be16_to_cpu(arg->params.cv_element_size); + + for (; j < (i + 1) * be16_to_cpu(arg->params.cv_element_size); j++) + *n += sprintf(buf + *n, "%02x", (u8)arg->bytes[j]); + *n += sprintf(buf + *n, "\n"); + } + + if (*n >= PAGE_SIZE) { + pr_info("System information exceeds PAGE_SIZE\n"); + return -EFBIG; + } + + return ret; +} + +static ssize_t processor_bus_topology_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 value 0xD0 corresponds to request + * type 'Processor_bus_topology', to retrieve + * the system topology information. + * starting_index value implies the starting hardware + * chip id. + */ + ret = systeminfo_gpci_request(PROCESSOR_BUS_TOPOLOGY, 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 make 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 + 3] + + (arg->bytes[last_element + 2] << 8) + + (arg->bytes[last_element + 1] << 16) + + (arg->bytes[last_element] << 24) + 1; + + memset(arg, 0, HGPCI_REQ_BUFFER_SIZE); + + ret = systeminfo_gpci_request(PROCESSOR_BUS_TOPOLOGY, 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); @@ -118,6 +253,11 @@ static struct attribute *interface_attrs[] = { &hv_caps_attr_expanded.attr, &hv_caps_attr_lab.attr, &hv_caps_attr_collect_privileged.attr, + /* + * This NULL is a placeholder for the processor_bus_topology + * attribute, set in init function if applicable. + */ + NULL, NULL, }; @@ -143,8 +283,6 @@ static const struct attribute_group *attr_groups[] = { NULL, }; -static DEFINE_PER_CPU(char, hv_gpci_reqb[HGPCI_REQ_BUFFER_SIZE]) __aligned(sizeof(uint64_t)); - static unsigned long single_gpci_request(u32 req, u32 starting_index, u16 secondary_index, u8 version_in, u32 offset, u8 length, u64 *value) @@ -325,6 +463,44 @@ static int hv_gpci_cpu_hotplug_init(void) ppc_hv_gpci_cpu_offline); } +static void add_sysinfo_interface_files(void) +{ + struct device_attribute *attr = NULL; + unsigned long ret; + struct hv_gpci_request_buffer *arg; + + /* Check for counter request type PROCESSOR_BUS_TOPOLOGY support */ + arg = (void *)get_cpu_var(hv_gpci_reqb); + memset(arg, 0, HGPCI_REQ_BUFFER_SIZE); + + arg->params.counter_request = cpu_to_be32(PROCESSOR_BUS_TOPOLOGY); + + ret = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO, + virt_to_phys(arg), HGPCI_REQ_BUFFER_SIZE); + + put_cpu_var(hv_gpci_reqb); + + /* + * Add processor_bus_topology attribute in the interface_attrs + * attribute array, only for valid return types. + */ + if (!ret || ret == H_AUTHORITY || ret == H_PARAMETER) { + attr = kzalloc(sizeof(*attr), GFP_KERNEL); + + if (!attr) { + pr_info("Memory allocation failed for sysinfo interface files\n"); + return; + } + + sysfs_attr_init(&attr->attr); + attr->attr.name = "processor_bus_topology"; + attr->attr.mode = 0444; + attr->show = processor_bus_topology_show; + interface_attrs[INTERFACE_PROCESSOR_BUS_TOPOLOGY_ATTR] = &attr->attr; + } else + pr_devel("hcall failed, with error: 0x%lx\n", ret); +} + static int hv_gpci_init(void) { int r; @@ -388,6 +564,10 @@ static int hv_gpci_init(void) if (r) return r; + /* sysinfo interface files are only available for power10 and above platforms */ + if (PVR_VER(mfspr(SPRN_PVR)) >= PVR_POWER10) + add_sysinfo_interface_files(); + return 0; } From patchwork Sat Jul 29 07:34:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kajol Jain X-Patchwork-Id: 1814476 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=eQVnGsWh; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RCbv72PpBz1yf1 for ; Sat, 29 Jul 2023 17:37:39 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=eQVnGsWh; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4RCbv66phVz3dCW for ; Sat, 29 Jul 2023 17:37:38 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=eQVnGsWh; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=kjain@linux.ibm.com; receiver=lists.ozlabs.org) Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4RCbs043Nmz3cRD for ; Sat, 29 Jul 2023 17:35:48 +1000 (AEST) Received: from pps.filterd (m0353729.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36T7Vd3A002899; Sat, 29 Jul 2023 07:35:23 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=k9deFilQAYH3Se3ZM2RqMNcHtPdKhbHAAGRsaS1/7eE=; b=eQVnGsWhIbGaP5cazCzArF7T9kG86XKjD6AJatjg20/77m8dsoslvDAzi5VVx0YAD1Ex K+eGWaD7j6EA2OkFUV0PFVhP+AfiV120zozZ8dx7Ov1E9CrUmLFh7Gmhc/fZyHJY//2Y ekRNz8WA6/dacb235RhtKeKu/a7sCH8YWd0v+HcZCR/NJzEsFlYXHKvEFD2gpTLKs1dR WvacMJ049eI/03xFOo9p9Bd+030wO5gw88pURAMO6CyjNRjDAyIbYl4iJrhSOyhQdwDp S+Ya4zbfdQUHB4S7s8zh9fQnO9oIQ2bJGTLI9rOppcq++pllCrRx4N1FTM0qabzotcL0 Qw== Received: from ppma12.dal12v.mail.ibm.com (dc.9e.1632.ip4.static.sl-reverse.com [50.22.158.220]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3s4xf085e4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:35:23 +0000 Received: from pps.filterd (ppma12.dal12v.mail.ibm.com [127.0.0.1]) by ppma12.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 36T6KKJe026189; Sat, 29 Jul 2023 07:35:22 GMT Received: from smtprelay01.fra02v.mail.ibm.com ([9.218.2.227]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 3s0sesw7kw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:35:22 +0000 Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay01.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 36T7ZJDG20841100 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 29 Jul 2023 07:35:19 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7E7C820040; Sat, 29 Jul 2023 07:35:19 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2A8B52004B; Sat, 29 Jul 2023 07:35:17 +0000 (GMT) Received: from li-e8dccbcc-2adc-11b2-a85c-bc1f33b9b810.ibm.com.com (unknown [9.171.60.192]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Sat, 29 Jul 2023 07:35:16 +0000 (GMT) From: Kajol Jain To: mpe@ellerman.id.au Subject: [PATCH v4 02/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document processor_bus_topology sysfs interface file Date: Sat, 29 Jul 2023 13:04:47 +0530 Message-Id: <20230729073455.7918-3-kjain@linux.ibm.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20230729073455.7918-1-kjain@linux.ibm.com> References: <20230729073455.7918-1-kjain@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: -gylUQ9AY_CiY7yczIsi9AiQfjaQ4bqX X-Proofpoint-GUID: -gylUQ9AY_CiY7yczIsi9AiQfjaQ4bqX 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=2023-07-27_10,2023-07-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 spamscore=0 impostorscore=0 malwarescore=0 mlxlogscore=999 lowpriorityscore=0 mlxscore=0 phishscore=0 clxscore=1015 adultscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307290068 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: atrajeev@linux.vnet.ibm.com, kjain@linux.ibm.com, rdunlap@infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, maddy@linux.ibm.com, disgoel@linux.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Add details of the new hv-gpci interface file called "processor_bus_topology" in the ABI documentation. Reviewed-by: Athira Rajeev Signed-off-by: Kajol Jain --- .../sysfs-bus-event_source-devices-hv_gpci | 32 +++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci index 12e2bf92783f..ba3f9aa3d68e 100644 --- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci @@ -80,3 +80,35 @@ Contact: Linux on PowerPC Developer List Description: read only This sysfs file exposes the cpumask which is designated to make HCALLs to retrieve hv-gpci pmu event counter data. + +What: /sys/devices/hv_gpci/interface/processor_bus_topology +Date: July 2023 +Contact: Linux on PowerPC Developer List +Description: admin read only + This sysfs file exposes the system topology information by making HCALL + H_GET_PERF_COUNTER_INFO. The HCALL is made with counter request value + PROCESSOR_BUS_TOPOLOGY(0xD0). + + * This sysfs file will be created only for power10 and above platforms. + + * User needs root privileges to read data from this sysfs file. + + * This sysfs file will be created, only when the HCALL returns "H_SUCCESS", + "H_AUTHORITY" or "H_PARAMETER" as the return type. + + HCALL with return error type "H_AUTHORITY" can be resolved during + runtime by setting "Enable Performance Information Collection" option. + + * The end user reading this sysfs file must decode the content as per + underlying platform/firmware. + + Possible error codes while reading this sysfs file: + + * "-EPERM" : Partition is not permitted to retrieve performance information, + required to set "Enable Performance Information Collection" option. + + * "-EIO" : Can't retrieve system information because of invalid buffer length/invalid address + or because of some hardware error. Refer to getPerfCountInfo documentation for + more information. + + * "-EFBIG" : System information exceeds PAGE_SIZE. From patchwork Sat Jul 29 07:34:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kajol Jain X-Patchwork-Id: 1814480 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=YSk59KIi; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RCc016KYDz20G5 for ; Sat, 29 Jul 2023 17:41:53 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=YSk59KIi; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4RCc015Ggnz3dVc for ; Sat, 29 Jul 2023 17:41:53 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=YSk59KIi; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=kjain@linux.ibm.com; receiver=lists.ozlabs.org) Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4RCbyV5Tdxz3dCL for ; Sat, 29 Jul 2023 17:40:34 +1000 (AEST) Received: from pps.filterd (m0353726.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36T7d0dJ001376; Sat, 29 Jul 2023 07:40:26 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=M2KM8mg31YDBIbmykogbZ0lt0/AFUAfhcUNP86jfaXU=; b=YSk59KIikFLlrHwkJsYOU3VIgwv+7ueNNg9yujZfPsEfggRtp4/kN6fI4iBNBx6lSHSt ne4ZiRqjDdDWgZ1pLGfjhhxF4FxBMFsBJMWdrH/AINYcz3CisVB3Dwvkfnkaiae6Wlkt vFi+Rwad7PvG95jD4nYDk0JaCR/IrQjlzeKzos9NHGBuYeWBOGFP9EIA2JniexfKae37 3ivymFMwWyR8mnrdqdDD3vDpo/zscwtlf9Aq1g0emFXm/Y86e62nHXMxwewxe/Up0zMO wHISRpF9xGrP3qehlcg5nxC+36thSg4FI3lz97JOigQjyvNJcZClGFQ5NXd46Nr/XhdX bA== Received: from ppma13.dal12v.mail.ibm.com (dd.9e.1632.ip4.static.sl-reverse.com [50.22.158.221]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3s4w4pha06-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:40:26 +0000 Received: from pps.filterd (ppma13.dal12v.mail.ibm.com [127.0.0.1]) by ppma13.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 36T5tNco001858; Sat, 29 Jul 2023 07:35:25 GMT Received: from smtprelay07.fra02v.mail.ibm.com ([9.218.2.229]) by ppma13.dal12v.mail.ibm.com (PPS) with ESMTPS id 3s0unkcbtc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:35:25 +0000 Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay07.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 36T7ZMXD60817744 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 29 Jul 2023 07:35:22 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2F9B62004B; Sat, 29 Jul 2023 07:35:22 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D6D9620040; Sat, 29 Jul 2023 07:35:19 +0000 (GMT) Received: from li-e8dccbcc-2adc-11b2-a85c-bc1f33b9b810.ibm.com.com (unknown [9.171.60.192]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Sat, 29 Jul 2023 07:35:19 +0000 (GMT) From: Kajol Jain To: mpe@ellerman.id.au Subject: [PATCH v4 03/10] powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show processor config information Date: Sat, 29 Jul 2023 13:04:48 +0530 Message-Id: <20230729073455.7918-4-kjain@linux.ibm.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20230729073455.7918-1-kjain@linux.ibm.com> References: <20230729073455.7918-1-kjain@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: z95M726Z55-sVFkkDImcGZXEgDM3z0Wr X-Proofpoint-ORIG-GUID: z95M726Z55-sVFkkDImcGZXEgDM3z0Wr 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=2023-07-27_10,2023-07-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxscore=0 adultscore=0 lowpriorityscore=0 mlxlogscore=999 suspectscore=0 clxscore=1015 malwarescore=0 spamscore=0 bulkscore=0 impostorscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307290068 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: atrajeev@linux.vnet.ibm.com, kjain@linux.ibm.com, rdunlap@infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, maddy@linux.ibm.com, disgoel@linux.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" The hcall H_GET_PERF_COUNTER_INFO with counter request value as PROCESSOR_CONFIG(0X90), can be used to get the system processor configuration information. To expose the system processor config information, patch adds sysfs file called "processor_config" to the "/sys/devices/hv_gpci/interface/" of hv_gpci pmu driver. Add enum and sysinfo_counter_request array to get required counter request value in hv-gpci.c file. Also add a new function called "sysinfo_device_attr_create", which will create and return required device attribute to the add_sysinfo_interface_files function. The processor_config sysfs file is only available for power10 and above platforms. Add a new macro called INTERFACE_PROCESSOR_CONFIG_ATTR, which points to the index of NULL placefolder, for processor_config attribute in the interface_attrs array. Also add macro INTERFACE_NULL_ATTR which points to index of NULL attribute in interface_attrs array. Reviewed-by: Athira Rajeev Signed-off-by: Kajol Jain --- arch/powerpc/perf/hv-gpci.c | 168 ++++++++++++++++++++++++++++++++---- 1 file changed, 153 insertions(+), 15 deletions(-) diff --git a/arch/powerpc/perf/hv-gpci.c b/arch/powerpc/perf/hv-gpci.c index 225f148f75fd..c74076d3c7a7 100644 --- a/arch/powerpc/perf/hv-gpci.c +++ b/arch/powerpc/perf/hv-gpci.c @@ -102,11 +102,21 @@ static ssize_t cpumask_show(struct device *dev, return cpumap_print_to_pagebuf(true, buf, &hv_gpci_cpumask); } -/* Counter request value to retrieve system information */ -#define PROCESSOR_BUS_TOPOLOGY 0XD0 - /* Interface attribute array index to store system information */ #define INTERFACE_PROCESSOR_BUS_TOPOLOGY_ATTR 6 +#define INTERFACE_PROCESSOR_CONFIG_ATTR 7 +#define INTERFACE_NULL_ATTR 8 + +/* Counter request value to retrieve system information */ +enum { + PROCESSOR_BUS_TOPOLOGY, + PROCESSOR_CONFIG +}; + +static int sysinfo_counter_request[] = { + [PROCESSOR_BUS_TOPOLOGY] = 0xD0, + [PROCESSOR_CONFIG] = 0x90, +}; static DEFINE_PER_CPU(char, hv_gpci_reqb[HGPCI_REQ_BUFFER_SIZE]) __aligned(sizeof(uint64_t)); @@ -187,7 +197,8 @@ static ssize_t processor_bus_topology_show(struct device *dev, struct device_att * starting_index value implies the starting hardware * chip id. */ - ret = systeminfo_gpci_request(PROCESSOR_BUS_TOPOLOGY, 0, 0, buf, &n, arg); + ret = systeminfo_gpci_request(sysinfo_counter_request[PROCESSOR_BUS_TOPOLOGY], + 0, 0, buf, &n, arg); if (!ret) return n; @@ -220,8 +231,76 @@ static ssize_t processor_bus_topology_show(struct device *dev, struct device_att memset(arg, 0, HGPCI_REQ_BUFFER_SIZE); - ret = systeminfo_gpci_request(PROCESSOR_BUS_TOPOLOGY, starting_index, - 0, buf, &n, arg); + ret = systeminfo_gpci_request(sysinfo_counter_request[PROCESSOR_BUS_TOPOLOGY], + 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 ssize_t processor_config_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 value 0x90 corresponds to request + * type 'Processor_config', to retrieve + * the system processor information. + * starting_index value implies the starting hardware + * processor index. + */ + ret = systeminfo_gpci_request(sysinfo_counter_request[PROCESSOR_CONFIG], + 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 is part of counter_value + * buffer elements, use the starting index value in the last + * element and add 1 to subsequent hcalls. + */ + u32 starting_index = arg->bytes[last_element + 3] + + (arg->bytes[last_element + 2] << 8) + + (arg->bytes[last_element + 1] << 16) + + (arg->bytes[last_element] << 24) + 1; + + memset(arg, 0, HGPCI_REQ_BUFFER_SIZE); + + ret = systeminfo_gpci_request(sysinfo_counter_request[PROCESSOR_CONFIG], + starting_index, 0, buf, &n, arg); if (!ret) return n; @@ -258,6 +337,11 @@ static struct attribute *interface_attrs[] = { * attribute, set in init function if applicable. */ NULL, + /* + * This NULL is a placeholder for the processor_config + * attribute, set in init function if applicable. + */ + NULL, NULL, }; @@ -463,17 +547,24 @@ static int hv_gpci_cpu_hotplug_init(void) ppc_hv_gpci_cpu_offline); } -static void add_sysinfo_interface_files(void) +static struct device_attribute *sysinfo_device_attr_create(int + sysinfo_interface_group_index, u32 req) { struct device_attribute *attr = NULL; unsigned long ret; struct hv_gpci_request_buffer *arg; - /* Check for counter request type PROCESSOR_BUS_TOPOLOGY support */ + if (sysinfo_interface_group_index < INTERFACE_PROCESSOR_BUS_TOPOLOGY_ATTR || + sysinfo_interface_group_index >= INTERFACE_NULL_ATTR) { + pr_info("Wrong interface group index for system information\n"); + return NULL; + } + + /* Check for given counter request value support */ arg = (void *)get_cpu_var(hv_gpci_reqb); memset(arg, 0, HGPCI_REQ_BUFFER_SIZE); - arg->params.counter_request = cpu_to_be32(PROCESSOR_BUS_TOPOLOGY); + arg->params.counter_request = cpu_to_be32(req); ret = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO, virt_to_phys(arg), HGPCI_REQ_BUFFER_SIZE); @@ -481,24 +572,71 @@ static void add_sysinfo_interface_files(void) put_cpu_var(hv_gpci_reqb); /* - * Add processor_bus_topology attribute in the interface_attrs + * Add given counter request value attribute in the interface_attrs * attribute array, only for valid return types. */ if (!ret || ret == H_AUTHORITY || ret == H_PARAMETER) { attr = kzalloc(sizeof(*attr), GFP_KERNEL); if (!attr) { - pr_info("Memory allocation failed for sysinfo interface files\n"); - return; + pr_info("Mem allocation failed, for sysinfo interface file"); + return NULL; } sysfs_attr_init(&attr->attr); - attr->attr.name = "processor_bus_topology"; attr->attr.mode = 0444; - attr->show = processor_bus_topology_show; - interface_attrs[INTERFACE_PROCESSOR_BUS_TOPOLOGY_ATTR] = &attr->attr; + + switch (sysinfo_interface_group_index) { + case INTERFACE_PROCESSOR_BUS_TOPOLOGY_ATTR: + attr->attr.name = "processor_bus_topology"; + attr->show = processor_bus_topology_show; + break; + case INTERFACE_PROCESSOR_CONFIG_ATTR: + attr->attr.name = "processor_config"; + attr->show = processor_config_show; + break; + } } else pr_devel("hcall failed, with error: 0x%lx\n", ret); + + return attr; +} + +static void add_sysinfo_interface_files(void) +{ + int sysfs_count; + struct device_attribute *attr[INTERFACE_NULL_ATTR - INTERFACE_PROCESSOR_BUS_TOPOLOGY_ATTR]; + int i; + + sysfs_count = INTERFACE_NULL_ATTR - INTERFACE_PROCESSOR_BUS_TOPOLOGY_ATTR; + + /* Get device attribute for a given counter request value */ + for (i = 0; i < sysfs_count; i++) { + attr[i] = sysinfo_device_attr_create(i + INTERFACE_PROCESSOR_BUS_TOPOLOGY_ATTR, + sysinfo_counter_request[i]); + + if (!attr[i]) + goto out; + } + + /* Add sysinfo interface attributes in the interface_attrs attribute array */ + for (i = 0; i < sysfs_count; i++) + interface_attrs[i + INTERFACE_PROCESSOR_BUS_TOPOLOGY_ATTR] = &attr[i]->attr; + + return; + +out: + /* + * The sysinfo interface attributes will be added, only if hcall passed for + * all the counter request values. Free the device attribute array incase + * of any hcall failure. + */ + if (i > 0) { + while (i >= 0) { + kfree(attr[i]); + i--; + } + } } static int hv_gpci_init(void) From patchwork Sat Jul 29 07:34:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kajol Jain X-Patchwork-Id: 1814483 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=FiaGT/r7; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RCcKX1fT8z20G5 for ; Sat, 29 Jul 2023 17:57:03 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=FiaGT/r7; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4RCcKW0rybz2ygX for ; Sat, 29 Jul 2023 17:57:03 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=FiaGT/r7; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.158.5; helo=mx0b-001b2d01.pphosted.com; envelope-from=kjain@linux.ibm.com; receiver=lists.ozlabs.org) Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4RCcK73WbPz2yTv for ; Sat, 29 Jul 2023 17:56:43 +1000 (AEST) Received: from pps.filterd (m0353725.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36T7ggnu022803; Sat, 29 Jul 2023 07:56:32 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=2PW13i7yY+YDLk2/jWYH+35YjgAbTB9Y8L6X3671Is8=; b=FiaGT/r7/CPoMo+xuffY7O+T/Gj0iYWXv/aos2illab+X8H2X34Au/C8DiMez381AUxz ypmFplBviBmd2rkXWF8NlMCQvflfKLT65Mbfl2n1DqxjH1+XaRQP8VQ9xxgzPofYdqTb aw1LuSgI7BiI3AR2xrqVW+WOTmXZurrZBRBGcAyaIl2Xxa9G2pNJgaqgbChAkE6TuMd5 M7/7f0sc41oQd9pzhrM589mGhzHekv/kDxu6V54QUiIZrC1K5gvYZxOh+ol+rjaUeiwx 0qu+xNIAfXiq8vNE73gsR7MhSeRw+50gObFezpVqLZ73jGcStpfMWnpsc4vzeYWoMKiy aA== Received: from ppma13.dal12v.mail.ibm.com (dd.9e.1632.ip4.static.sl-reverse.com [50.22.158.221]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3s4x6mgffa-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:56:32 +0000 Received: from pps.filterd (ppma13.dal12v.mail.ibm.com [127.0.0.1]) by ppma13.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 36T5m1hm002278; Sat, 29 Jul 2023 07:35:27 GMT Received: from smtprelay04.fra02v.mail.ibm.com ([9.218.2.228]) by ppma13.dal12v.mail.ibm.com (PPS) with ESMTPS id 3s0unkcbth-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:35:27 +0000 Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay04.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 36T7ZPrx33555176 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 29 Jul 2023 07:35:25 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E7AD020043; Sat, 29 Jul 2023 07:35:24 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 935AE2004B; Sat, 29 Jul 2023 07:35:22 +0000 (GMT) Received: from li-e8dccbcc-2adc-11b2-a85c-bc1f33b9b810.ibm.com.com (unknown [9.171.60.192]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Sat, 29 Jul 2023 07:35:22 +0000 (GMT) From: Kajol Jain To: mpe@ellerman.id.au Subject: [PATCH v4 04/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document processor_config sysfs interface file Date: Sat, 29 Jul 2023 13:04:49 +0530 Message-Id: <20230729073455.7918-5-kjain@linux.ibm.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20230729073455.7918-1-kjain@linux.ibm.com> References: <20230729073455.7918-1-kjain@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: s8BUCDQstrD3CiV3l2YlbQ5RIp6xf54c X-Proofpoint-GUID: s8BUCDQstrD3CiV3l2YlbQ5RIp6xf54c 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=2023-07-27_10,2023-07-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 lowpriorityscore=0 impostorscore=0 mlxscore=0 adultscore=0 priorityscore=1501 suspectscore=0 bulkscore=0 clxscore=1015 spamscore=0 mlxlogscore=999 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307290068 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: atrajeev@linux.vnet.ibm.com, kjain@linux.ibm.com, rdunlap@infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, maddy@linux.ibm.com, disgoel@linux.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Add details of the new hv-gpci interface file called "processor_config" in the ABI documentation. Reviewed-by: Athira Rajeev Signed-off-by: Kajol Jain --- .../sysfs-bus-event_source-devices-hv_gpci | 32 +++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci index ba3f9aa3d68e..9e81de18142f 100644 --- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci @@ -112,3 +112,35 @@ Description: admin read only more information. * "-EFBIG" : System information exceeds PAGE_SIZE. + +What: /sys/devices/hv_gpci/interface/processor_config +Date: July 2023 +Contact: Linux on PowerPC Developer List +Description: admin read only + This sysfs file exposes the system topology information by making HCALL + H_GET_PERF_COUNTER_INFO. The HCALL is made with counter request value + PROCESSOR_CONFIG(0x90). + + * This sysfs file will be created only for power10 and above platforms. + + * User needs root privileges to read data from this sysfs file. + + * This sysfs file will be created, only when the HCALL returns "H_SUCCESS", + "H_AUTHORITY" or "H_PARAMETER" as the return type. + + HCALL with return error type "H_AUTHORITY" can be resolved during + runtime by setting "Enable Performance Information Collection" option. + + * The end user reading this sysfs file must decode the content as per + underlying platform/firmware. + + Possible error codes while reading this sysfs file: + + * "-EPERM" : Partition is not permitted to retrieve performance information, + required to set "Enable Performance Information Collection" option. + + * "-EIO" : Can't retrieve system information because of invalid buffer length/invalid address + or because of some hardware error. Refer to getPerfCountInfo documentation for + more information. + + * "-EFBIG" : System information exceeds PAGE_SIZE. From patchwork Sat Jul 29 07:34:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kajol Jain X-Patchwork-Id: 1814484 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=WLZtDB+t; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RCcLT00jKz20G5 for ; Sat, 29 Jul 2023 17:57:52 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=WLZtDB+t; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4RCcLS60wqz3cVN for ; Sat, 29 Jul 2023 17:57:52 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=WLZtDB+t; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=kjain@linux.ibm.com; receiver=lists.ozlabs.org) Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4RCcKP5r97z2ygx for ; Sat, 29 Jul 2023 17:56:57 +1000 (AEST) Received: from pps.filterd (m0353726.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36T7cUVb000385; Sat, 29 Jul 2023 07:56:49 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=QzEourZELW4rJpn7fc91WRiILgdvOdX7QlygmsrF3xQ=; b=WLZtDB+tllDFXdL5n341jjfAhGHh/HV4TCX/DIvqEXs6+4AzEFUr9VGsb+qf4lnwqO5L YZIZ3HqSIgAmHW8O2/jgejhcM4NSbC/jj5oe6k0E56dUSqyOS2RaawEPqHgAYOP+Ez28 2ov9PsghWHX4W4uxvfYliIB4ye8VlEREZDy/e590qkZMnRHIwwXVQrQR2Sen3ISNxA2M AmUwgUrtg0k8zckoGmgjr4bFoafFa8fgJo7Sp3QGw2Hk2vsuAVrw9ohE+Mz/Eb2deFKd uMmwLnuOEEqJmLMGXd+THocQkAdo2zRf879Lj9yQPTOgiTC8PmN+Vv35IPTYPnloTk6n xA== Received: from ppma11.dal12v.mail.ibm.com (db.9e.1632.ip4.static.sl-reverse.com [50.22.158.219]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3s4w4phh5b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:56:48 +0000 Received: from pps.filterd (ppma11.dal12v.mail.ibm.com [127.0.0.1]) by ppma11.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 36T6JBGe016569; Sat, 29 Jul 2023 07:35:30 GMT Received: from smtprelay05.fra02v.mail.ibm.com ([9.218.2.225]) by ppma11.dal12v.mail.ibm.com (PPS) with ESMTPS id 3s0v52476v-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:35:30 +0000 Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay05.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 36T7ZRuq15205030 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 29 Jul 2023 07:35:27 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9DB7320040; Sat, 29 Jul 2023 07:35:27 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 596E52004E; Sat, 29 Jul 2023 07:35:25 +0000 (GMT) Received: from li-e8dccbcc-2adc-11b2-a85c-bc1f33b9b810.ibm.com.com (unknown [9.171.60.192]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Sat, 29 Jul 2023 07:35:25 +0000 (GMT) From: Kajol Jain To: mpe@ellerman.id.au Subject: [PATCH v4 05/10] powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show affinity domain via virtual processor information Date: Sat, 29 Jul 2023 13:04:50 +0530 Message-Id: <20230729073455.7918-6-kjain@linux.ibm.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20230729073455.7918-1-kjain@linux.ibm.com> References: <20230729073455.7918-1-kjain@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 95ZUGtqK2Pb6kWFPIfz2ZPu79htDY_yg X-Proofpoint-ORIG-GUID: 95ZUGtqK2Pb6kWFPIfz2ZPu79htDY_yg 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=2023-07-27_10,2023-07-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxscore=0 adultscore=0 lowpriorityscore=0 mlxlogscore=999 suspectscore=0 clxscore=1015 malwarescore=0 spamscore=0 bulkscore=0 impostorscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307290068 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: atrajeev@linux.vnet.ibm.com, kjain@linux.ibm.com, rdunlap@infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, maddy@linux.ibm.com, disgoel@linux.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" The hcall H_GET_PERF_COUNTER_INFO with counter request value as AFFINITY_DOMAIN_INFORMATION_BY_VIRTUAL_PROCESSOR(0XA0), can be used to get the system affinity domain via virtual processor information. To expose the system affinity domain via virtual processor information, patch adds sysfs file called "affinity_domain_via_virtual_processor" to the "/sys/devices/hv_gpci/interface/" of hv_gpci pmu driver. The affinity_domain_via_virtual_processor sysfs file is only available for power10 and above platforms. Add a macro called INTERFACE_AFFINITY_DOMAIN_VIA_VP_ATTR, which points to the index of NULL placeholder, for affinity_domain_via_virtual_processor attribute in interface_attrs array. Also updated the value of INTERFACE_NULL_ATTR macro in hv-gpci.c file. Reviewed-by: Athira Rajeev Signed-off-by: Kajol Jain --- arch/powerpc/perf/hv-gpci.c | 86 ++++++++++++++++++++++++++++++++++++- 1 file changed, 84 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/perf/hv-gpci.c b/arch/powerpc/perf/hv-gpci.c index c74076d3c7a7..68502cb18262 100644 --- a/arch/powerpc/perf/hv-gpci.c +++ b/arch/powerpc/perf/hv-gpci.c @@ -105,17 +105,20 @@ static ssize_t cpumask_show(struct device *dev, /* Interface attribute array index to store system information */ #define INTERFACE_PROCESSOR_BUS_TOPOLOGY_ATTR 6 #define INTERFACE_PROCESSOR_CONFIG_ATTR 7 -#define INTERFACE_NULL_ATTR 8 +#define INTERFACE_AFFINITY_DOMAIN_VIA_VP_ATTR 8 +#define INTERFACE_NULL_ATTR 9 /* Counter request value to retrieve system information */ enum { PROCESSOR_BUS_TOPOLOGY, - PROCESSOR_CONFIG + PROCESSOR_CONFIG, + AFFINITY_DOMAIN_VIA_VP, /* affinity domain via virtual processor */ }; static int sysinfo_counter_request[] = { [PROCESSOR_BUS_TOPOLOGY] = 0xD0, [PROCESSOR_CONFIG] = 0x90, + [AFFINITY_DOMAIN_VIA_VP] = 0xA0, }; static DEFINE_PER_CPU(char, hv_gpci_reqb[HGPCI_REQ_BUFFER_SIZE]) __aligned(sizeof(uint64_t)); @@ -316,6 +319,76 @@ static ssize_t processor_config_show(struct device *dev, struct device_attribute return ret; } +static ssize_t affinity_domain_via_virtual_processor_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 0xA0 corresponds to request + * type 'Affinity_domain_information_by_virutal_processor', + * 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_VP], + 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 secondary index to retrieve additional (missing) data. + * Below loop do subsequent hcalls with next secondary 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 and secondary index type is part of the + * counter_value buffer elements, use the starting index value in the + * last array element as subsequent starting index, and use secondary index + * value in the last array element plus 1 as subsequent secondary index. + * For counter request '0xA0', starting index points to partition id + * and secondary index points to corresponding virtual processor index. + */ + u32 starting_index = arg->bytes[last_element + 1] + (arg->bytes[last_element] << 8); + u16 secondary_index = arg->bytes[last_element + 3] + + (arg->bytes[last_element + 2] << 8) + 1; + + memset(arg, 0, HGPCI_REQ_BUFFER_SIZE); + + ret = systeminfo_gpci_request(sysinfo_counter_request[AFFINITY_DOMAIN_VIA_VP], + starting_index, secondary_index, 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); @@ -342,6 +415,11 @@ static struct attribute *interface_attrs[] = { * attribute, set in init function if applicable. */ NULL, + /* + * This NULL is a placeholder for the affinity_domain_via_virtual_processor + * attribute, set in init function if applicable. + */ + NULL, NULL, }; @@ -595,6 +673,10 @@ static struct device_attribute *sysinfo_device_attr_create(int attr->attr.name = "processor_config"; attr->show = processor_config_show; break; + case INTERFACE_AFFINITY_DOMAIN_VIA_VP_ATTR: + attr->attr.name = "affinity_domain_via_virtual_processor"; + attr->show = affinity_domain_via_virtual_processor_show; + break; } } else pr_devel("hcall failed, with error: 0x%lx\n", ret); From patchwork Sat Jul 29 07:34:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kajol Jain X-Patchwork-Id: 1814481 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=BLK6Isoc; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RCc162x8Kz20G5 for ; Sat, 29 Jul 2023 17:42:50 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=BLK6Isoc; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4RCc161sTTz3dFv for ; Sat, 29 Jul 2023 17:42:50 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=BLK6Isoc; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=kjain@linux.ibm.com; receiver=lists.ozlabs.org) Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4RCbyf67zBz3dS0 for ; Sat, 29 Jul 2023 17:40:42 +1000 (AEST) Received: from pps.filterd (m0356517.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36T7bXSP007000; Sat, 29 Jul 2023 07:40:34 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=QzT5AbDBkGsFdC0dUTUu+ChsD8khELBxkrheXrPRPYk=; b=BLK6IsocXXLc4XKKZd61lyWslRBfT7jMOgAH1yIHbdGUVjF7Ylr7NG3oV9Za51vjtE5Q 3s2fAImCWyC7c9hQHkZh/sMb9fkXXesRsIX4bHa+Uiveps9CcPvVdT9UxYfGtRv1cNP8 YnNKguKcuNwxpoD/aTLZqF6s7wzIInaQqG2tQOLNfSSIjFjAJS8in5gYK1QDSxMKfh1q nEmQB8ywqf01Q9X0lgtb1CtwfWv7pFBSOJq746uvLva8nvX6lVZBT4h0ABvsrjsrE1O3 mNQbFCArjaqmL1Dh+o4y7bf+oWHT9KopNA7CefJrSR2yyJpYZMDn0sN+lR1UT2gt4DmB Qw== Received: from ppma13.dal12v.mail.ibm.com (dd.9e.1632.ip4.static.sl-reverse.com [50.22.158.221]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3s4wjn9c1n-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:40:34 +0000 Received: from pps.filterd (ppma13.dal12v.mail.ibm.com [127.0.0.1]) by ppma13.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 36T5m1hn002278; Sat, 29 Jul 2023 07:35:33 GMT Received: from smtprelay02.fra02v.mail.ibm.com ([9.218.2.226]) by ppma13.dal12v.mail.ibm.com (PPS) with ESMTPS id 3s0unkcbtr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:35:33 +0000 Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay02.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 36T7ZUJj28115652 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 29 Jul 2023 07:35:30 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 477FE20043; Sat, 29 Jul 2023 07:35:30 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0150F20040; Sat, 29 Jul 2023 07:35:28 +0000 (GMT) Received: from li-e8dccbcc-2adc-11b2-a85c-bc1f33b9b810.ibm.com.com (unknown [9.171.60.192]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Sat, 29 Jul 2023 07:35:27 +0000 (GMT) From: Kajol Jain To: mpe@ellerman.id.au Subject: [PATCH v4 06/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document affinity_domain_via_virtual_processor sysfs interface file Date: Sat, 29 Jul 2023 13:04:51 +0530 Message-Id: <20230729073455.7918-7-kjain@linux.ibm.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20230729073455.7918-1-kjain@linux.ibm.com> References: <20230729073455.7918-1-kjain@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: ysfu466rFpIp8w691oWh5Z_1yQ1qutUC X-Proofpoint-GUID: ysfu466rFpIp8w691oWh5Z_1yQ1qutUC 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=2023-07-27_10,2023-07-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 phishscore=0 spamscore=0 suspectscore=0 bulkscore=0 adultscore=0 mlxlogscore=999 malwarescore=0 priorityscore=1501 impostorscore=0 lowpriorityscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307290068 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: atrajeev@linux.vnet.ibm.com, kjain@linux.ibm.com, rdunlap@infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, maddy@linux.ibm.com, disgoel@linux.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Add details of the new hv-gpci interface file called "affinity_domain_via_virtual_processor" in the ABI documentation. Reviewed-by: Athira Rajeev Signed-off-by: Kajol Jain --- .../sysfs-bus-event_source-devices-hv_gpci | 32 +++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci index 9e81de18142f..5ee33218be83 100644 --- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci @@ -144,3 +144,35 @@ Description: admin read only more information. * "-EFBIG" : System information exceeds PAGE_SIZE. + +What: /sys/devices/hv_gpci/interface/affinity_domain_via_virtual_processor +Date: July 2023 +Contact: Linux on PowerPC Developer List +Description: admin read only + This sysfs file exposes the system topology information by making HCALL + H_GET_PERF_COUNTER_INFO. The HCALL is made with counter request value + AFFINITY_DOMAIN_INFORMATION_BY_VIRTUAL_PROCESSOR(0xA0). + + * This sysfs file will be created only for power10 and above platforms. + + * User needs root privileges to read data from this sysfs file. + + * This sysfs file will be created, only when the HCALL returns "H_SUCCESS", + "H_AUTHORITY" or "H_PARAMETER" as the return type. + + HCALL with return error type "H_AUTHORITY" can be resolved during + runtime by setting "Enable Performance Information Collection" option. + + * The end user reading this sysfs file must decode the content as per + underlying platform/firmware. + + Possible error codes while reading this sysfs file: + + * "-EPERM" : Partition is not permitted to retrieve performance information, + required to set "Enable Performance Information Collection" option. + + * "-EIO" : Can't retrieve system information because of invalid buffer length/invalid address + or because of some hardware error. Refer to getPerfCountInfo documentation for + more information. + + * "-EFBIG" : System information exceeds PAGE_SIZE. From patchwork Sat Jul 29 07:34:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kajol Jain X-Patchwork-Id: 1814485 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=k5F8lY8g; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RCdDH2Rb9z1yf1 for ; Sat, 29 Jul 2023 18:37:34 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=k5F8lY8g; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4RCdDF5c2Fz3cSK for ; Sat, 29 Jul 2023 18:37:33 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=k5F8lY8g; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=kjain@linux.ibm.com; receiver=lists.ozlabs.org) Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4RCdCr2bt8z2yq4 for ; Sat, 29 Jul 2023 18:37:11 +1000 (AEST) Received: from pps.filterd (m0353727.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36T8XdcF010886; Sat, 29 Jul 2023 08:36:51 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=XeK4Sf5juNaQH99VDRhIaB3pMmMFubU2ytlj8MSnGig=; b=k5F8lY8gleFrWSw+4yFnHuA1Cn+roFCc6botNgplIUJj7561MPH84ayLKHGAG4W4tarQ r3IAVOMs9CGG6XJtVgZFGz896WjKhBQbg71YphdWnmHNSNbBL5bl/D8Kvb8gQcMfieOs 9WIg+AzfnIaYjiUQhq1yU22+LIQHmwRmTKSpysZci15VeOgB0Hi0FRgTgBFlY9MYh3Je jK6B/dWKoJd13cXl4fj4lmrvRddw4RRYAEcHkz3EXbvHPkztellztF8YsPVDmMeDZXMO nXU52/ZgaF8QOkkwU2rfGQ0JN+UTgG4SarnOngaOhyAKIP4vvS3RfcnD/3Ah4YFFwPmb Zw== Received: from ppma13.dal12v.mail.ibm.com (dd.9e.1632.ip4.static.sl-reverse.com [50.22.158.221]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3s4xpt8t6u-4 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 08:36:50 +0000 Received: from pps.filterd (ppma13.dal12v.mail.ibm.com [127.0.0.1]) by ppma13.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 36T5m1ho002278; Sat, 29 Jul 2023 07:35:35 GMT Received: from smtprelay01.fra02v.mail.ibm.com ([9.218.2.227]) by ppma13.dal12v.mail.ibm.com (PPS) with ESMTPS id 3s0unkcbtw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:35:35 +0000 Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay01.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 36T7ZXTD20841122 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 29 Jul 2023 07:35:33 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E7F7620040; Sat, 29 Jul 2023 07:35:32 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A944520043; Sat, 29 Jul 2023 07:35:30 +0000 (GMT) Received: from li-e8dccbcc-2adc-11b2-a85c-bc1f33b9b810.ibm.com.com (unknown [9.171.60.192]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Sat, 29 Jul 2023 07:35:30 +0000 (GMT) From: Kajol Jain To: mpe@ellerman.id.au Subject: [PATCH v4 07/10] powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show affinity domain via domain information Date: Sat, 29 Jul 2023 13:04:52 +0530 Message-Id: <20230729073455.7918-8-kjain@linux.ibm.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20230729073455.7918-1-kjain@linux.ibm.com> References: <20230729073455.7918-1-kjain@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: gJdRYkVTtnigIZOHx0glgf-Nyoap21h2 X-Proofpoint-GUID: gJdRYkVTtnigIZOHx0glgf-Nyoap21h2 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=2023-07-27_10,2023-07-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 mlxlogscore=999 priorityscore=1501 phishscore=0 mlxscore=0 adultscore=0 bulkscore=0 spamscore=0 lowpriorityscore=0 suspectscore=0 impostorscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307290078 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: atrajeev@linux.vnet.ibm.com, kjain@linux.ibm.com, rdunlap@infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, maddy@linux.ibm.com, disgoel@linux.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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. Reviewed-by: Athira Rajeev 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); From patchwork Sat Jul 29 07:34:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kajol Jain X-Patchwork-Id: 1814475 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=GZlH6qse; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RCbt92Z9rz1yf1 for ; Sat, 29 Jul 2023 17:36:49 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=GZlH6qse; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4RCbt91c7Vz3cWs for ; Sat, 29 Jul 2023 17:36:49 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=GZlH6qse; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=kjain@linux.ibm.com; receiver=lists.ozlabs.org) Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4RCbry4Zx6z3c3c for ; Sat, 29 Jul 2023 17:35:46 +1000 (AEST) Received: from pps.filterd (m0353729.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36T7VeOm002961; Sat, 29 Jul 2023 07:35:41 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=H81kA9Dz4ecJqR8OPoKtqlKnSdss/12WwxTPHU5xrPo=; b=GZlH6qsekyYwRLOmKseVN5cFfKV7G5VM+cX8bTlWM4B1Uvx6eKgXOJ/p7sZ1eHq3Nhjv QMort92kqste7khD++zH2bbOpR7Af/IHzvMGLNh9nCxY0PUx2z9D5Gl1lM8+jpNI2Tki T0seEw4UovWJmVTjsYj3opsf3iS+ZgOUHPeSvHU7bymE9LmR+UkBU6livBNwrth4L0SA wsPae63xyruG5UN5iqCkAXXj1vFFz6oG+30zyhIqye7GMD2Bp8r9J0hAsdv4JZt31oPA 7eqjDKafd554WM3zir3S6UrUDeWFkZ70YT70kvEgWKGXEbcdEAVIbqrk+aGCoLukSp5+ Mw== Received: from ppma21.wdc07v.mail.ibm.com (5b.69.3da9.ip4.static.sl-reverse.com [169.61.105.91]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3s4xf085tm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:35:40 +0000 Received: from pps.filterd (ppma21.wdc07v.mail.ibm.com [127.0.0.1]) by ppma21.wdc07v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 36T77Zit002059; Sat, 29 Jul 2023 07:35:39 GMT Received: from smtprelay06.fra02v.mail.ibm.com ([9.218.2.230]) by ppma21.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3s0tenvrcq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:35:38 +0000 Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay06.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 36T7ZZu435259012 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 29 Jul 2023 07:35:35 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id AE50720043; Sat, 29 Jul 2023 07:35:35 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 563F720040; Sat, 29 Jul 2023 07:35:33 +0000 (GMT) Received: from li-e8dccbcc-2adc-11b2-a85c-bc1f33b9b810.ibm.com.com (unknown [9.171.60.192]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Sat, 29 Jul 2023 07:35:33 +0000 (GMT) From: Kajol Jain To: mpe@ellerman.id.au Subject: [PATCH v4 08/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document affinity_domain_via_domain sysfs interface file Date: Sat, 29 Jul 2023 13:04:53 +0530 Message-Id: <20230729073455.7918-9-kjain@linux.ibm.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20230729073455.7918-1-kjain@linux.ibm.com> References: <20230729073455.7918-1-kjain@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: oYC8XAidcKMt_1mqTMjNboRnJLYXoFeV X-Proofpoint-GUID: oYC8XAidcKMt_1mqTMjNboRnJLYXoFeV 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=2023-07-27_10,2023-07-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 spamscore=0 impostorscore=0 malwarescore=0 mlxlogscore=999 lowpriorityscore=0 mlxscore=0 phishscore=0 clxscore=1015 adultscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307290068 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: atrajeev@linux.vnet.ibm.com, kjain@linux.ibm.com, rdunlap@infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, maddy@linux.ibm.com, disgoel@linux.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Add details of the new hv-gpci interface file called "affinity_domain_via_domain" in the ABI documentation. Reviewed-by: Athira Rajeev Signed-off-by: Kajol Jain --- .../sysfs-bus-event_source-devices-hv_gpci | 32 +++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci index 5ee33218be83..399f0a2bd546 100644 --- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci @@ -176,3 +176,35 @@ Description: admin read only more information. * "-EFBIG" : System information exceeds PAGE_SIZE. + +What: /sys/devices/hv_gpci/interface/affinity_domain_via_domain +Date: July 2023 +Contact: Linux on PowerPC Developer List +Description: admin read only + This sysfs file exposes the system topology information by making HCALL + H_GET_PERF_COUNTER_INFO. The HCALL is made with counter request value + AFFINITY_DOMAIN_INFORMATION_BY_DOMAIN(0xB0). + + * This sysfs file will be created only for power10 and above platforms. + + * User needs root privileges to read data from this sysfs file. + + * This sysfs file will be created, only when the HCALL returns "H_SUCCESS", + "H_AUTHORITY" or "H_PARAMETER" as the return type. + + HCALL with return error type "H_AUTHORITY" can be resolved during + runtime by setting "Enable Performance Information Collection" option. + + * The end user reading this sysfs file must decode the content as per + underlying platform/firmware. + + Possible error codes while reading this sysfs file: + + * "-EPERM" : Partition is not permitted to retrieve performance information, + required to set "Enable Performance Information Collection" option. + + * "-EIO" : Can't retrieve system information because of invalid buffer length/invalid address + or because of some hardware error. Refer to getPerfCountInfo documentation for + more information. + + * "-EFBIG" : System information exceeds PAGE_SIZE. From patchwork Sat Jul 29 07:34:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kajol Jain X-Patchwork-Id: 1814477 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=UEOU4hIh; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RCbw35wD2z1yf1 for ; Sat, 29 Jul 2023 17:38:27 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=UEOU4hIh; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4RCbw34qxTz3dG8 for ; Sat, 29 Jul 2023 17:38:27 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=UEOU4hIh; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=kjain@linux.ibm.com; receiver=lists.ozlabs.org) Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4RCbs13nrmz3cRd for ; Sat, 29 Jul 2023 17:35:49 +1000 (AEST) Received: from pps.filterd (m0353729.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36T7Vd3h002899; Sat, 29 Jul 2023 07:35:44 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=lwwBgQuDYZpc32iqdJ5vsmUCoFWugm6cdc3BZhEyaBI=; b=UEOU4hIhu+G+QczdXXjuVs3q57LS+t43+fgDhOiPmog4ZhYcRu+/RoDYjPpJc3w0/eUS 9v41pn4hjohehViK3c78mkBpe6F3znoMWUpfEows8SZXfJTNAArnR2PMrWkS1lzSoCuq bc1f8WaJFuWaAf0gBm0WCfVmPq+ZH7atajgqB5Y3DwrESaYaUDhPQXqqzSkbDV4U1eoQ JEtY9+0F/jZN1N5HVFfRvJegPgnXWqYAbSIde8vdYXwPNTS7otDV1mDvJZZQUvi0gEKO DXyFyPttU6pm9ivDQkGHY+aEsXW9Ka5J/UIviYai6Odbc3eOSQCVgNOW+72FUowm1vkV OA== Received: from ppma13.dal12v.mail.ibm.com (dd.9e.1632.ip4.static.sl-reverse.com [50.22.158.221]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3s4xf085x3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:35:43 +0000 Received: from pps.filterd (ppma13.dal12v.mail.ibm.com [127.0.0.1]) by ppma13.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 36T6AJuM002379; Sat, 29 Jul 2023 07:35:41 GMT Received: from smtprelay03.fra02v.mail.ibm.com ([9.218.2.224]) by ppma13.dal12v.mail.ibm.com (PPS) with ESMTPS id 3s0unkcbu2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:35:41 +0000 Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay03.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 36T7ZcPh60490124 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 29 Jul 2023 07:35:38 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 422E120043; Sat, 29 Jul 2023 07:35:38 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1C28C20040; Sat, 29 Jul 2023 07:35:36 +0000 (GMT) Received: from li-e8dccbcc-2adc-11b2-a85c-bc1f33b9b810.ibm.com.com (unknown [9.171.60.192]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Sat, 29 Jul 2023 07:35:35 +0000 (GMT) From: Kajol Jain To: mpe@ellerman.id.au Subject: [PATCH v4 09/10] powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show affinity domain via partition information Date: Sat, 29 Jul 2023 13:04:54 +0530 Message-Id: <20230729073455.7918-10-kjain@linux.ibm.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20230729073455.7918-1-kjain@linux.ibm.com> References: <20230729073455.7918-1-kjain@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: Qfc2I3r_L27rVq9uEq5bBbP5lMu57Zdm X-Proofpoint-GUID: Qfc2I3r_L27rVq9uEq5bBbP5lMu57Zdm 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=2023-07-27_10,2023-07-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 spamscore=0 impostorscore=0 malwarescore=0 mlxlogscore=999 lowpriorityscore=0 mlxscore=0 phishscore=0 clxscore=1015 adultscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307290068 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: atrajeev@linux.vnet.ibm.com, kjain@linux.ibm.com, rdunlap@infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, maddy@linux.ibm.com, disgoel@linux.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" The hcall H_GET_PERF_COUNTER_INFO with counter request value as AFFINITY_DOMAIN_INFORMATION_BY_PARTITION(0XB1), can be used to get the system affinity domain via partition information. To expose the system affinity domain via partition information, patch adds sysfs file called "affinity_domain_via_partition" to the "/sys/devices/hv_gpci/interface/" of hv_gpci pmu driver. Add new entry for AFFINITY_DOMAIN_VIA_PAR in sysinfo_counter_request array, which points to the counter request value "affinity_domain_via_partition" in hv-gpci.c file. Also add a new function called "affinity_domain_via_partition_result_parse" to parse the hcall result and store it in output buffer. The affinity_domain_via_partition sysfs file is only available for power10 and above platforms. Add a macro called INTERFACE_AFFINITY_DOMAIN_VIA_PAR_ATTR, which points to the index of NULL placeholder, for affinity_domain_via_partition attribute in interface_attrs array. Also updated the value of INTERFACE_NULL_ATTR macro in hv-gpci.c file. Reviewed-by: Athira Rajeev Signed-off-by: Kajol Jain --- arch/powerpc/perf/hv-gpci.c | 160 +++++++++++++++++++++++++++++++++++- 1 file changed, 159 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/perf/hv-gpci.c b/arch/powerpc/perf/hv-gpci.c index 326b758df7c8..f2fff166290b 100644 --- a/arch/powerpc/perf/hv-gpci.c +++ b/arch/powerpc/perf/hv-gpci.c @@ -107,7 +107,8 @@ static ssize_t cpumask_show(struct device *dev, #define INTERFACE_PROCESSOR_CONFIG_ATTR 7 #define INTERFACE_AFFINITY_DOMAIN_VIA_VP_ATTR 8 #define INTERFACE_AFFINITY_DOMAIN_VIA_DOM_ATTR 9 -#define INTERFACE_NULL_ATTR 10 +#define INTERFACE_AFFINITY_DOMAIN_VIA_PAR_ATTR 10 +#define INTERFACE_NULL_ATTR 11 /* Counter request value to retrieve system information */ enum { @@ -115,6 +116,7 @@ enum { PROCESSOR_CONFIG, AFFINITY_DOMAIN_VIA_VP, /* affinity domain via virtual processor */ AFFINITY_DOMAIN_VIA_DOM, /* affinity domain via domain */ + AFFINITY_DOMAIN_VIA_PAR, /* affinity domain via partition */ }; static int sysinfo_counter_request[] = { @@ -122,6 +124,7 @@ static int sysinfo_counter_request[] = { [PROCESSOR_CONFIG] = 0x90, [AFFINITY_DOMAIN_VIA_VP] = 0xA0, [AFFINITY_DOMAIN_VIA_DOM] = 0xB0, + [AFFINITY_DOMAIN_VIA_PAR] = 0xB1, }; static DEFINE_PER_CPU(char, hv_gpci_reqb[HGPCI_REQ_BUFFER_SIZE]) __aligned(sizeof(uint64_t)); @@ -458,6 +461,152 @@ static ssize_t affinity_domain_via_domain_show(struct device *dev, struct device return ret; } +static void affinity_domain_via_partition_result_parse(int returned_values, + int element_size, char *buf, size_t *last_element, + size_t *n, struct hv_gpci_request_buffer *arg) +{ + size_t i = 0, j = 0; + size_t k, l, m; + uint16_t total_affinity_domain_ele, size_of_each_affinity_domain_ele; + + /* + * hcall H_GET_PERF_COUNTER_INFO populates the 'returned_values' + * to show the total number of counter_value array elements + * returned via hcall. + * Unlike other request types, the data structure returned by this + * request is variable-size. For this counter request type, + * hcall populates 'cv_element_size' corresponds to minimum size of + * the structure returned i.e; the size of the structure with no domain + * information. Below loop go through all counter_value array + * to determine the number and size of each domain array element and + * add it to the output buffer. + */ + while (i < returned_values) { + k = j; + for (; k < j + element_size; k++) + *n += sprintf(buf + *n, "%02x", (u8)arg->bytes[k]); + *n += sprintf(buf + *n, "\n"); + + total_affinity_domain_ele = (u8)arg->bytes[k - 2] << 8 | (u8)arg->bytes[k - 3]; + size_of_each_affinity_domain_ele = (u8)arg->bytes[k] << 8 | (u8)arg->bytes[k - 1]; + + for (l = 0; l < total_affinity_domain_ele; l++) { + for (m = 0; m < size_of_each_affinity_domain_ele; m++) { + *n += sprintf(buf + *n, "%02x", (u8)arg->bytes[k]); + k++; + } + *n += sprintf(buf + *n, "\n"); + } + + *n += sprintf(buf + *n, "\n"); + i++; + j = k; + } + + *last_element = k; +} + +static ssize_t affinity_domain_via_partition_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct hv_gpci_request_buffer *arg; + unsigned long ret; + size_t n = 0; + size_t last_element = 0; + u32 starting_index; + + arg = (void *)get_cpu_var(hv_gpci_reqb); + memset(arg, 0, HGPCI_REQ_BUFFER_SIZE); + + /* + * Pass the counter request value 0xB1 corresponds to counter request + * type 'Affinity_domain_information_by_partition', + * to retrieve the system affinity domain by partition information. + * starting_index value refers to the starting hardware + * processor index. + */ + arg->params.counter_request = cpu_to_be32(sysinfo_counter_request[AFFINITY_DOMAIN_VIA_PAR]); + arg->params.starting_index = cpu_to_be32(0); + + ret = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO, + virt_to_phys(arg), HGPCI_REQ_BUFFER_SIZE); + + if (!ret) + goto parse_result; + + /* + * ret value as 'H_PARAMETER' implies that the current buffer size + * can't accommodate all the information, and a partial buffer + * returned. To handle that, we need to make 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) { + affinity_domain_via_partition_result_parse( + be16_to_cpu(arg->params.returned_values) - 1, + be16_to_cpu(arg->params.cv_element_size), buf, + &last_element, &n, arg); + + if (n >= PAGE_SIZE) { + put_cpu_var(hv_gpci_reqb); + pr_debug("System information exceeds PAGE_SIZE\n"); + return -EFBIG; + } + + /* + * 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. + */ + starting_index = (u8)arg->bytes[last_element] << 8 | + (u8)arg->bytes[last_element + 1]; + + memset(arg, 0, HGPCI_REQ_BUFFER_SIZE); + arg->params.counter_request = cpu_to_be32( + sysinfo_counter_request[AFFINITY_DOMAIN_VIA_PAR]); + arg->params.starting_index = cpu_to_be32(starting_index); + + ret = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO, + virt_to_phys(arg), HGPCI_REQ_BUFFER_SIZE); + + if (ret && (ret != H_PARAMETER)) + goto out; + } + +parse_result: + affinity_domain_via_partition_result_parse( + be16_to_cpu(arg->params.returned_values), + be16_to_cpu(arg->params.cv_element_size), + buf, &last_element, &n, arg); + + put_cpu_var(hv_gpci_reqb); + return n; + +out: + put_cpu_var(hv_gpci_reqb); + + /* + * ret value as 'H_PARAMETER' corresponds to 'GEN_BUF_TOO_SMALL', + * which means that the current buffer size cannot accommodate + * all the information and a partial buffer returned. + * hcall fails incase of ret value other than H_SUCCESS or H_PARAMETER. + * + * ret value as H_AUTHORITY implies that partition is not permitted to retrieve + * performance information, and required to set + * "Enable Performance Information Collection" option. + */ + if (ret == H_AUTHORITY) + return -EPERM; + + /* + * hcall can fail with other possible ret value like H_PRIVILEGE/H_HARDWARE + * because of invalid buffer-length/address or due to some hardware + * error. + */ + return -EIO; +} + static DEVICE_ATTR_RO(kernel_version); static DEVICE_ATTR_RO(cpumask); @@ -494,6 +643,11 @@ static struct attribute *interface_attrs[] = { * attribute, set in init function if applicable. */ NULL, + /* + * This NULL is a placeholder for the affinity_domain_via_partition + * attribute, set in init function if applicable. + */ + NULL, NULL, }; @@ -755,6 +909,10 @@ static struct device_attribute *sysinfo_device_attr_create(int attr->attr.name = "affinity_domain_via_domain"; attr->show = affinity_domain_via_domain_show; break; + case INTERFACE_AFFINITY_DOMAIN_VIA_PAR_ATTR: + attr->attr.name = "affinity_domain_via_partition"; + attr->show = affinity_domain_via_partition_show; + break; } } else pr_devel("hcall failed, with error: 0x%lx\n", ret); From patchwork Sat Jul 29 07:34:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kajol Jain X-Patchwork-Id: 1814478 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=fVoh44ux; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RCbx10FFDz1yf1 for ; Sat, 29 Jul 2023 17:39:16 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=fVoh44ux; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4RCbx033BGz3dCY for ; Sat, 29 Jul 2023 17:39:16 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=fVoh44ux; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=kjain@linux.ibm.com; receiver=lists.ozlabs.org) Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4RCbs32zvBz3cQp for ; Sat, 29 Jul 2023 17:35:51 +1000 (AEST) Received: from pps.filterd (m0353729.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36T7VfHt002987; Sat, 29 Jul 2023 07:35:46 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=ng1vw/N5TFd2UeSDRR2UQ53jgNVyb5m3WC9w622TzYw=; b=fVoh44ux7Urz2veB3PmEg0fDP7ZM/IhQws2pYJ9tpWkgGCj9fw2je5vc84Sv211GmTe6 2naS12hP6VRvn6vkh4IjenT0pUJxuEswVcm947C2zE0g+QezE/Cp5NNejmgOOzom0NG7 asuQ130IKcYnCD5OVAeG0yiY8dxiT3PVGihO4lx5D9mHnWbr2xSsarkl9Mdo13dcqYca 9latzcVBQdrPuLIVpIplMlmdBiW6w1mMbo33pv5h9eFTjuk7B+cIKFVzbuBJ5TjImsAh UzBIirOwJUac392b/ZKwty5Qw6DU3sJJku7puTB/a/3SfiUIZkrkufViCeBu2hSwV4hE TQ== Received: from ppma12.dal12v.mail.ibm.com (dc.9e.1632.ip4.static.sl-reverse.com [50.22.158.220]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3s4xf0862n-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:35:45 +0000 Received: from pps.filterd (ppma12.dal12v.mail.ibm.com [127.0.0.1]) by ppma12.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 36T6KKJi026189; Sat, 29 Jul 2023 07:35:43 GMT Received: from smtprelay05.fra02v.mail.ibm.com ([9.218.2.225]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 3s0sesw7ms-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 29 Jul 2023 07:35:43 +0000 Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay05.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 36T7Zfps12649100 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 29 Jul 2023 07:35:41 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F1AD920040; Sat, 29 Jul 2023 07:35:40 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A13D920043; Sat, 29 Jul 2023 07:35:38 +0000 (GMT) Received: from li-e8dccbcc-2adc-11b2-a85c-bc1f33b9b810.ibm.com.com (unknown [9.171.60.192]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Sat, 29 Jul 2023 07:35:38 +0000 (GMT) From: Kajol Jain To: mpe@ellerman.id.au Subject: [PATCH v4 10/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document affinity_domain_via_partition sysfs interface file Date: Sat, 29 Jul 2023 13:04:55 +0530 Message-Id: <20230729073455.7918-11-kjain@linux.ibm.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20230729073455.7918-1-kjain@linux.ibm.com> References: <20230729073455.7918-1-kjain@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: i73zKlSDfYifJYTkbViiAeUZ0yLmGdT7 X-Proofpoint-GUID: i73zKlSDfYifJYTkbViiAeUZ0yLmGdT7 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=2023-07-27_10,2023-07-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 spamscore=0 impostorscore=0 malwarescore=0 mlxlogscore=999 lowpriorityscore=0 mlxscore=0 phishscore=0 clxscore=1015 adultscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307290068 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: atrajeev@linux.vnet.ibm.com, kjain@linux.ibm.com, rdunlap@infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, maddy@linux.ibm.com, disgoel@linux.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Add details of the new hv-gpci interface file called "affinity_domain_via_partition" in the ABI documentation. Reviewed-by: Athira Rajeev Signed-off-by: Kajol Jain --- .../sysfs-bus-event_source-devices-hv_gpci | 32 +++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci index 399f0a2bd546..40f7cd240591 100644 --- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci @@ -208,3 +208,35 @@ Description: admin read only more information. * "-EFBIG" : System information exceeds PAGE_SIZE. + +What: /sys/devices/hv_gpci/interface/affinity_domain_via_partition +Date: July 2023 +Contact: Linux on PowerPC Developer List +Description: admin read only + This sysfs file exposes the system topology information by making HCALL + H_GET_PERF_COUNTER_INFO. The HCALL is made with counter request value + AFFINITY_DOMAIN_INFORMATION_BY_PARTITION(0xB1). + + * This sysfs file will be created only for power10 and above platforms. + + * User needs root privileges to read data from this sysfs file. + + * This sysfs file will be created, only when the HCALL returns "H_SUCCESS", + "H_AUTHORITY" or "H_PARAMETER" as the return type. + + HCALL with return error type "H_AUTHORITY" can be resolved during + runtime by setting "Enable Performance Information Collection" option. + + * The end user reading this sysfs file must decode the content as per + underlying platform/firmware. + + Possible error codes while reading this sysfs file: + + * "-EPERM" : Partition is not permitted to retrieve performance information, + required to set "Enable Performance Information Collection" option. + + * "-EIO" : Can't retrieve system information because of invalid buffer length/invalid address + or because of some hardware error. Refer to getPerfCountInfo documentation for + more information. + + * "-EFBIG" : System information exceeds PAGE_SIZE.