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 DBCB3C35FFF for ; Fri, 21 Mar 2025 07:22:48 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4ZJv6W5rt9z30Ds; Fri, 21 Mar 2025 18:22:43 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=148.163.156.1 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1742541763; cv=none; b=kDMGn22jCFqJmX9E39UMz0Du6ez9ILtccJLF3vli2Cq30i/ri2tlrhSGuQKXqF43xXLWoXDMaTG//48rqKi/Nbp3M41G/y1ONTzs2n7BTDWh/g/n1dvdzRNp4Y7qpS0bX1peV5gKIn8HYUkebCBfVAgGiCgjIqImx6LuN3IAJnH6p8ptw3uV82J1zY18AEC0dHXwr9W3sGhcKLEQFYOlwWCtEGxrKFGS6AhaCkv/nlWpq28cbqDp+Olo3Hnil7X8EIfEfLGlj7xPp3MYeYKyjPEMMWHTFeWUCiC8QSg9F1Ths38Rmbt+MnvG6Wn7RSjZhQguIx7ajZyG+pkJrv0NnQ== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1742541763; c=relaxed/relaxed; bh=cmN1BmfxuCKMniJkvISSSA4JKIclpcnDTn37U4pv76w=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=GvYw1HJMOeoNPUqbLumABpqZqY+edyiYRI4FZQyKjzZayBjszr8noJAb9t50oBniGYSnQypiEp55FwbprRrFdCQ+L5f6yRQoji6iOBslrT4qko1c2yDL44QKrKwCvj2DlztKJW0sLpPNBJZmi12KP+Po0y3D9CUa4KKQ7FF5RNkPuC5W3J5ttMrYnRHgD1/odyp0OY1X3gSiSjlTHkC/YdhKQdpX5EHqrJD18rxDg6oCFBTdb1mw2EDw5YU0BWum9zTSkO8GGi/Onxcjz9Abx/fOuFwielomG7npoUehzdjUDrlt+0ZUFVAibmNXQfT1qLdFiWRzE4yqng2bAphsgA== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=G5wMdQ/K; dkim-atps=neutral; spf=pass (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=atrajeev@linux.ibm.com; receiver=lists.ozlabs.org) smtp.mailfrom=linux.ibm.com 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=G5wMdQ/K; 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=atrajeev@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 4ZJv6V4Dyyz2yrS for ; Fri, 21 Mar 2025 18:22:42 +1100 (AEDT) Received: from pps.filterd (m0353729.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 52KJKDqs030263 for ; Fri, 21 Mar 2025 07:22:40 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pp1; bh=cmN1Bm fxuCKMniJkvISSSA4JKIclpcnDTn37U4pv76w=; b=G5wMdQ/KdBL8rOFYdYORnF lb88MaRJHB40gVfcjqBCiaqVRnbBwBJtVL8JWUfUHG45uip0P/BSgvU+KDEkkXZS jZiObiIVShbJ+OyGZTYDCD/iyA+/Nvm00ceZTV6eP69V22tJF9/zoyoyN07QO0At wfkyNf9MQNSXWefbUtshq/+IWy7K1n6LCAxa6DyGzdwSIG+mojL0T6+T2Qwno4Lp RWwe+/CcT2Ia/7REoRSAQei0Pse2hQAe/BMpWV/nFuqADXh/3rR6WW+IoRP2W+/p YQwvXEDdNHtHUnWyM6oGBNAml8DfOzn5qGMoGezYCpEf0wtm5cBAO2FMH6WKoWIw == Received: from ppma22.wdc07v.mail.ibm.com (5c.69.3da9.ip4.static.sl-reverse.com [169.61.105.92]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 45gk21w0vf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 21 Mar 2025 07:22:39 +0000 (GMT) Received: from pps.filterd (ppma22.wdc07v.mail.ibm.com [127.0.0.1]) by ppma22.wdc07v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 52L5FpRc005579 for ; Fri, 21 Mar 2025 07:22:38 GMT Received: from smtprelay02.fra02v.mail.ibm.com ([9.218.2.226]) by ppma22.wdc07v.mail.ibm.com (PPS) with ESMTPS id 45dm90cc1y-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 21 Mar 2025 07:22:38 +0000 Received: from smtpav07.fra02v.mail.ibm.com (smtpav07.fra02v.mail.ibm.com [10.20.54.106]) by smtprelay02.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 52L7MX9D31457656 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 21 Mar 2025 07:22:33 GMT Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4CD1420043; Fri, 21 Mar 2025 07:22:33 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D837F20040; Fri, 21 Mar 2025 07:22:27 +0000 (GMT) Received: from localhost.localdomain (unknown [9.61.255.71]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 21 Mar 2025 07:22:27 +0000 (GMT) From: Athira Rajeev To: maddy@linux.ibm.com, linuxppc-dev@lists.ozlabs.org Cc: atrajeev@linux.ibm.com, disgoel@linux.vnet.ibm.com, hbathini@linux.vnet.ibm.com, Aditya.Bodkhe1@ibm.com, adubey@linux.ibm.com, skb99@linux.ibm.com, sshegde@linux.ibm.com, riteshh@linux.ibm.com, Tejas.Manhas1@ibm.com, venkat88@linux.ibm.com Subject: [PATCH V2 5/9] powerpc/pseries/htmdump: Add htm info support to htmdump module Date: Fri, 21 Mar 2025 12:51:48 +0530 Message-Id: <20250321072152.7414-6-atrajeev@linux.ibm.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) In-Reply-To: <20250321072152.7414-1-atrajeev@linux.ibm.com> References: <20250321072152.7414-1-atrajeev@linux.ibm.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: NJA2p0pUCYjvUN1LUkYTLNQRqaddHvpO X-Proofpoint-GUID: NJA2p0pUCYjvUN1LUkYTLNQRqaddHvpO X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1093,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-03-21_02,2025-03-20_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 clxscore=1015 bulkscore=0 adultscore=0 priorityscore=1501 spamscore=0 mlxlogscore=999 malwarescore=0 phishscore=0 impostorscore=0 lowpriorityscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2503210049 Support dumping system processor configuration from Hardware Trace Macro (HTM) function via debugfs interface. Under debugfs folder "/sys/kernel/debug/powerpc/htmdump", add file "htminfo”. The interface allows only read of this file which will present the content of HTM buffer from the hcall. The 16th offset of HTM buffer has value for the number of entries for array of processors. Use this information to copy data to the debugfs file Signed-off-by: Athira Rajeev --- arch/powerpc/platforms/pseries/htmdump.c | 49 ++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/arch/powerpc/platforms/pseries/htmdump.c b/arch/powerpc/platforms/pseries/htmdump.c index ef530c092ae4..b387e46f2b8e 100644 --- a/arch/powerpc/platforms/pseries/htmdump.c +++ b/arch/powerpc/platforms/pseries/htmdump.c @@ -13,6 +13,7 @@ static void *htm_buf; static void *htm_status_buf; +static void *htm_info_buf; static u32 nodeindex; static u32 nodalchipindex; static u32 coreindexonchip; @@ -243,6 +244,46 @@ static const struct file_operations htmstatus_fops = { .open = simple_open, }; +static ssize_t htminfo_read(struct file *filp, char __user *ubuf, + size_t count, loff_t *ppos) +{ + void *htm_info_buf = filp->private_data; + long rc, ret; + u64 *num_entries; + u64 to_copy; + + /* + * Invoke H_HTM call with: + * - operation as htm status (H_HTM_OP_STATUS) + * - last three values as addr, size and offset + */ + rc = htm_hcall_wrapper(nodeindex, nodalchipindex, coreindexonchip, + htmtype, H_HTM_OP_DUMP_SYSPROC_CONF, virt_to_phys(htm_info_buf), + PAGE_SIZE, 0); + + ret = htm_return_check(rc); + if (ret <= 0) + return ret; + + /* + * HTM status buffer, start of buffer + 0x10 gives the + * number of HTM entries in the buffer. Each entry of processor + * is 16 bytes. + * + * So total count to copy is: + * 32 bytes (for first 5 fields) + (number of HTM entries * entry size) + */ + num_entries = htm_info_buf + 0x10; + to_copy = 32 + (be64_to_cpu(*num_entries) * 16); + return simple_read_from_buffer(ubuf, count, ppos, htm_info_buf, to_copy); +} + +static const struct file_operations htminfo_fops = { + .llseek = NULL, + .read = htminfo_read, + .open = simple_open, +}; + DEFINE_SIMPLE_ATTRIBUTE(htmconfigure_fops, htmconfigure_get, htmconfigure_set, "%llu\n"); DEFINE_SIMPLE_ATTRIBUTE(htmstart_fops, htmstart_get, htmstart_set, "%llu\n"); @@ -280,7 +321,15 @@ static int htmdump_init_debugfs(void) return -ENOMEM; } + /* Debugfs interface file to present System Processor Configuration */ + htm_info_buf = kmalloc(PAGE_SIZE, GFP_KERNEL); + if (!htm_info_buf) { + pr_err("Failed to allocate htm info buf\n"); + return -ENOMEM; + } + debugfs_create_file("htmstatus", 0400, htmdump_debugfs_dir, htm_status_buf, &htmstatus_fops); + debugfs_create_file("htminfo", 0400, htmdump_debugfs_dir, htm_info_buf, &htminfo_fops); return 0; } -- 2.43.5