From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5D1DBC3064D for ; Tue, 2 Jul 2024 05:13:49 +0000 (UTC) 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=k0q2vbaS; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4WCrfg4yxdz3cB2 for ; Tue, 2 Jul 2024 15:13:47 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com 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=k0q2vbaS; 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=maddy@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 4WCrd92qp7z30YZ for ; Tue, 2 Jul 2024 15:12:29 +1000 (AEST) Received: from pps.filterd (m0353726.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4624um1R024621; Tue, 2 Jul 2024 05:12:23 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=0TGaFwwG+K4tj JWC6ccznkgSfIYZmMzK/vPCnf8XRvQ=; b=k0q2vbaSfm8TyNfDQOYrE/1FmKVIl tyn/B/4d3/S3VdS3xyrzarCjCdW6Z24dtAhDzrdZ6ZcblORQcpKpptIRXOC+NIBT 3JKE48/9Gk4mpzxhEToVQsa20FanIshmxUHFggYgnbP1tIpbuH529pdyFT7EI9Pd gXwi7UExwg2kkN7EJ1Ieq56XSEfNxylE0lnjFS3VXFOVFOpPfpQ8oDUh5KVQJkt8 aAI7P6hdmx0kk1jgbK22O9rSC3P1JqzV0Z4Zi81FhA5VqsuyiP/BryOrc1FG2KQA VXL+xM1BP0xUPJoWLexGdrg3rNUGK7geg2elZqL9Mt9KlxLmJ9YkqWxlA== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 404a4305a6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 02 Jul 2024 05:12:22 +0000 (GMT) Received: from m0353726.ppops.net (m0353726.ppops.net [127.0.0.1]) by pps.reinject (8.18.0.8/8.18.0.8) with ESMTP id 4625CMsx014668; Tue, 2 Jul 2024 05:12:22 GMT 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 404a4305a3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 02 Jul 2024 05:12:22 +0000 (GMT) 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 4624DtdB009515; Tue, 2 Jul 2024 05:12:21 GMT Received: from smtprelay07.fra02v.mail.ibm.com ([9.218.2.229]) by ppma13.dal12v.mail.ibm.com (PPS) with ESMTPS id 402xtmjt34-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 02 Jul 2024 05:12:20 +0000 Received: from smtpav01.fra02v.mail.ibm.com (smtpav01.fra02v.mail.ibm.com [10.20.54.100]) by smtprelay07.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 4625CFsn46858642 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 2 Jul 2024 05:12:17 GMT Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7A67A20043; Tue, 2 Jul 2024 05:12:15 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6837220040; Tue, 2 Jul 2024 05:12:12 +0000 (GMT) Received: from li-c439904c-24ed-11b2-a85c-b284a6847472.ibm.com.com (unknown [9.124.209.194]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 2 Jul 2024 05:12:12 +0000 (GMT) From: Madhavan Srinivasan To: mpe@ellerman.id.au Subject: [PATCH v2 2/3] powerpc/pseries: Export hardware trace macro dump via debugfs Date: Tue, 2 Jul 2024 10:41:44 +0530 Message-ID: <20240702051145.251267-2-maddy@linux.ibm.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240702051145.251267-1-maddy@linux.ibm.com> References: <20240702051145.251267-1-maddy@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: A2BhMo35eGvAyumvETuAA3gRvoxIArVs X-Proofpoint-GUID: wVHjoCcldUX_nvNhSU-NlGnEWw1Ah9rY X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-02_01,2024-07-01_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 malwarescore=0 adultscore=0 lowpriorityscore=0 suspectscore=0 bulkscore=0 phishscore=0 priorityscore=1501 spamscore=0 mlxlogscore=999 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2406140001 definitions=main-2407020033 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, christophe.leroy@csgroup.eu, Madhavan Srinivasan , npiggin@gmail.com, naveen.n.rao@linux.ibm.com, disgoel@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" This patch adds debugfs interface to export Hardware Trace Macro (HTM) function data in a LPAR. New hypervisor call "H_HTM" has been defined to setup, configure, control and dump the HTM data. This patch supports only dumping of HTM data in a LPAR. New debugfs folder called "htmdump" has been added under /sys/kernel/debug/arch path which contains files need to pass required parameters for the H_HTM dump function. New Kconfig option called "CONFIG_HTMDUMP" has been in platform/pseries for the same. With patch series applied and booted, list of files in debugfs path # pwd /sys/kernel/debug/powerpc/htmdump # ls coreindexonchip htmtype nodalchipindex nodeindex trace Signed-off-by: Madhavan Srinivasan --- Changelog v1: - Changed from tristate to bool with dependency flags - Trimmed the include headers arch/powerpc/platforms/pseries/Kconfig | 9 ++ arch/powerpc/platforms/pseries/Makefile | 1 + arch/powerpc/platforms/pseries/htmdump.c | 121 +++++++++++++++++++++++ 3 files changed, 131 insertions(+) create mode 100644 arch/powerpc/platforms/pseries/htmdump.c diff --git a/arch/powerpc/platforms/pseries/Kconfig b/arch/powerpc/platforms/pseries/Kconfig index afc0f6a61337..4814837a07d6 100644 --- a/arch/powerpc/platforms/pseries/Kconfig +++ b/arch/powerpc/platforms/pseries/Kconfig @@ -128,6 +128,15 @@ config CMM will be reused for other LPARs. The interface allows firmware to balance memory across many LPARs. +config HTMDUMP + bool "PHYP HTM data dumper" + depends on PPC_PSERIES && DEBUG_FS + default y + help + Select this option, if you want to enable the kernel debugfs + interface to dump the Hardware Trace Macro (HTM) function data + in the LPAR. + config HV_PERF_CTRS bool "Hypervisor supplied PMU events (24x7 & GPCI)" default y diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile index 7bf506f6b8c8..3f3e3492e436 100644 --- a/arch/powerpc/platforms/pseries/Makefile +++ b/arch/powerpc/platforms/pseries/Makefile @@ -19,6 +19,7 @@ obj-$(CONFIG_HVC_CONSOLE) += hvconsole.o obj-$(CONFIG_HVCS) += hvcserver.o obj-$(CONFIG_HCALL_STATS) += hvCall_inst.o obj-$(CONFIG_CMM) += cmm.o +obj-$(CONFIG_HTMDUMP) += htmdump.o obj-$(CONFIG_IO_EVENT_IRQ) += io_event_irq.o obj-$(CONFIG_LPARCFG) += lparcfg.o obj-$(CONFIG_IBMVIO) += vio.o diff --git a/arch/powerpc/platforms/pseries/htmdump.c b/arch/powerpc/platforms/pseries/htmdump.c new file mode 100644 index 000000000000..910abb9e3abc --- /dev/null +++ b/arch/powerpc/platforms/pseries/htmdump.c @@ -0,0 +1,121 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) IBM Corporation, 2024 + */ + +#define pr_fmt(fmt) "htmdump: " fmt + +#include + +#include +#include + +/* This enables us to keep track of the memory removed from each node. */ +struct htmdump_entry { + void *buf; + struct dentry *dir; + char name[16]; +}; + +static u32 nodeindex; +static u32 nodalchipindex; +static u32 coreindexonchip; +static u32 htmtype; + +#define BUFFER_SIZE PAGE_SIZE + +static ssize_t htmdump_read(struct file *filp, char __user *ubuf, + size_t count, loff_t *ppos) +{ + struct htmdump_entry *ent = filp->private_data; + unsigned long page, read_size, available; + loff_t offset; + long rc; + + page = ALIGN_DOWN(*ppos, BUFFER_SIZE); + offset = (*ppos) % BUFFER_SIZE; + + rc = htm_get_dump_hardware(nodeindex, nodalchipindex, coreindexonchip, + htmtype, virt_to_phys(ent->buf), BUFFER_SIZE, page); + + switch(rc) { + case H_SUCCESS: + case H_PARTIAL: + break; + case H_NOT_AVAILABLE: + return 0; + case H_BUSY: + case H_LONG_BUSY_ORDER_1_MSEC: + case H_LONG_BUSY_ORDER_10_MSEC: + case H_LONG_BUSY_ORDER_100_MSEC: + case H_LONG_BUSY_ORDER_1_SEC: + case H_LONG_BUSY_ORDER_10_SEC: + case H_LONG_BUSY_ORDER_100_SEC: + case H_PARAMETER: + case H_P2: + case H_P3: + case H_P4: + case H_P5: + case H_P6: + case H_STATE: + case H_AUTHORITY: + return -EINVAL; + } + + available = BUFFER_SIZE - offset; + read_size = min(count, available); + *ppos += read_size; + return simple_read_from_buffer(ubuf, count, &offset, ent->buf, available); +} + +static const struct file_operations htmdump_fops = { + .llseek = default_llseek, + .read = htmdump_read, + .open = simple_open, +}; + +static struct dentry *htmdump_debugfs_dir; + +static int htmdump_init_debugfs(void) +{ + struct htmdump_entry *ent; + + ent = kcalloc(1, sizeof(struct htmdump_entry), GFP_KERNEL); + if (!ent) { + pr_err("Failed to allocate ent\n"); + return -EINVAL; + } + + ent->buf = kmalloc(BUFFER_SIZE, GFP_KERNEL); + if (!ent->buf) { + pr_err("Failed to allocate htmdump buf\n"); + return -ENOMEM; + } + + pr_debug("%s: ent:%lx buf:%lx\n", + __func__, (long unsigned int)ent, (long unsigned int)ent->buf); + + htmdump_debugfs_dir = debugfs_create_dir("htmdump", + arch_debugfs_dir); + + debugfs_create_u32("nodeindex", 0600, + htmdump_debugfs_dir, &nodeindex); + debugfs_create_u32("nodalchipindex", 0600, + htmdump_debugfs_dir, &nodalchipindex); + debugfs_create_u32("coreindexonchip", 0600, + htmdump_debugfs_dir, &coreindexonchip); + debugfs_create_u32("htmtype", 0600, + htmdump_debugfs_dir, &htmtype); + debugfs_create_file("trace", 0400, htmdump_debugfs_dir, ent, &htmdump_fops); + + return 0; +} + +static int __init htmdump_init(void) +{ + if (htmdump_init_debugfs()) + return -EINVAL; + + return 0; +} +machine_device_initcall(pseries, htmdump_init); -- 2.45.2