From patchwork Mon Jul 20 12:54:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hari Bathini X-Patchwork-Id: 1332400 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4B9Mxg0hBYz9sPB for ; Mon, 20 Jul 2020 23:28:39 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4B9Mxg0CnRzDqLD for ; Mon, 20 Jul 2020 23:28:39 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Received: from ozlabs.org (bilbo.ozlabs.org [203.11.71.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4B9MC02mqczDqPN for ; Mon, 20 Jul 2020 22:55:08 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Received: from ozlabs.org (bilbo.ozlabs.org [203.11.71.1]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4B9MBw6gnKz9CYC for ; Mon, 20 Jul 2020 22:55:04 +1000 (AEST) Received: by ozlabs.org (Postfix) id 4B9MBw1lB1z9sRk; Mon, 20 Jul 2020 22:55:04 +1000 (AEST) Delivered-To: linuxppc-dev@ozlabs.org Authentication-Results: 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=hbathini@linux.ibm.com; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com 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 ozlabs.org (Postfix) with ESMTPS id 4B9MBv2CR7z9sRf for ; Mon, 20 Jul 2020 22:55:03 +1000 (AEST) Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 06KCYGMx048789; Mon, 20 Jul 2020 08:54:55 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 32d5x3tt0f-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 20 Jul 2020 08:54:55 -0400 Received: from m0098399.ppops.net (m0098399.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 06KCnApx095155; Mon, 20 Jul 2020 08:54:55 -0400 Received: from ppma04fra.de.ibm.com (6a.4a.5195.ip4.static.sl-reverse.com [149.81.74.106]) by mx0a-001b2d01.pphosted.com with ESMTP id 32d5x3tsy1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 20 Jul 2020 08:54:54 -0400 Received: from pps.filterd (ppma04fra.de.ibm.com [127.0.0.1]) by ppma04fra.de.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 06KCsqSg030721; Mon, 20 Jul 2020 12:54:52 GMT Received: from b06cxnps4074.portsmouth.uk.ibm.com (d06relay11.portsmouth.uk.ibm.com [9.149.109.196]) by ppma04fra.de.ibm.com with ESMTP id 32dbmn0021-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 20 Jul 2020 12:54:52 +0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 06KCsnBs43450526 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 20 Jul 2020 12:54:49 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6D26A52051; Mon, 20 Jul 2020 12:54:49 +0000 (GMT) Received: from hbathini.in.ibm.com (unknown [9.85.112.199]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 1E17152054; Mon, 20 Jul 2020 12:54:45 +0000 (GMT) Subject: [PATCH v4 11/12] ppc64/kexec_file: add appropriate regions for memory reserve map From: Hari Bathini To: Michael Ellerman , Andrew Morton Date: Mon, 20 Jul 2020 18:24:45 +0530 Message-ID: <159524967988.20855.14884929295062709123.stgit@hbathini.in.ibm.com> In-Reply-To: <159524918900.20855.17709718993097359220.stgit@hbathini.in.ibm.com> References: <159524918900.20855.17709718993097359220.stgit@hbathini.in.ibm.com> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-07-20_07:2020-07-20, 2020-07-20 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 clxscore=1015 mlxscore=0 suspectscore=0 malwarescore=0 mlxlogscore=999 priorityscore=1501 phishscore=0 impostorscore=0 adultscore=0 bulkscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007200086 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: Pingfan Liu , Kexec-ml , Nayna Jain , Petr Tesarik , Mahesh J Salgaonkar , Mimi Zohar , lkml , linuxppc-dev , Sourabh Jain , Vivek Goyal , Dave Young , Thiago Jung Bauermann , Eric Biederman Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" While initrd, elfcorehdr and backup regions are already added to the reserve map, there are a few missing regions that need to be added to the memory reserve map. Add them here. And now that all the changes to load panic kernel are in place, claim likewise. Signed-off-by: Hari Bathini Tested-by: Pingfan Liu Reviewed-by: Thiago Jung Bauermann --- v3 -> v4: * Fixed a spellcheck and added Reviewed-by tag from Thiago. v2 -> v3: * Unchanged. Added Tested-by tag from Pingfan. v1 -> v2: * Updated add_rtas_mem_range() & add_opal_mem_range() callsites based on the new prototype for these functions. arch/powerpc/kexec/file_load_64.c | 58 ++++++++++++++++++++++++++++++++++--- 1 file changed, 53 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/kexec/file_load_64.c b/arch/powerpc/kexec/file_load_64.c index 6840ddc..47642d5 100644 --- a/arch/powerpc/kexec/file_load_64.c +++ b/arch/powerpc/kexec/file_load_64.c @@ -203,6 +203,34 @@ static int get_crash_memory_ranges(struct crash_mem **mem_ranges) } /** + * get_reserved_memory_ranges - Get reserve memory ranges. This list includes + * memory regions that should be added to the + * memory reserve map to ensure the region is + * protected from any mischief. + * @mem_ranges: Range list to add the memory ranges to. + * + * Returns 0 on success, negative errno on error. + */ +static int get_reserved_memory_ranges(struct crash_mem **mem_ranges) +{ + int ret; + + ret = add_rtas_mem_range(mem_ranges); + if (ret) + goto out; + + ret = add_tce_mem_ranges(mem_ranges); + if (ret) + goto out; + + ret = add_reserved_ranges(mem_ranges); +out: + if (ret) + pr_err("Failed to setup reserved memory ranges\n"); + return ret; +} + +/** * __locate_mem_hole_top_down - Looks top down for a large enough memory hole * in the memory regions between buf_min & buf_max * for the buffer. If found, sets kbuf->mem. @@ -1259,8 +1287,8 @@ int setup_new_fdt_ppc64(const struct kimage *image, void *fdt, unsigned long initrd_load_addr, unsigned long initrd_len, const char *cmdline) { - struct crash_mem *umem = NULL; - int ret; + struct crash_mem *umem = NULL, *rmem = NULL; + int i, nr_ranges, ret; ret = setup_new_fdt(image, fdt, initrd_load_addr, initrd_len, cmdline); if (ret) @@ -1303,7 +1331,27 @@ int setup_new_fdt_ppc64(const struct kimage *image, void *fdt, } } + /* Update memory reserve map */ + ret = get_reserved_memory_ranges(&rmem); + if (ret) + goto out; + + nr_ranges = rmem ? rmem->nr_ranges : 0; + for (i = 0; i < nr_ranges; i++) { + u64 base, size; + + base = rmem->ranges[i].start; + size = rmem->ranges[i].end - base + 1; + ret = fdt_add_mem_rsv(fdt, base, size); + if (ret) { + pr_err("Error updating memory reserve map: %s\n", + fdt_strerror(ret)); + goto out; + } + } + out: + kfree(rmem); kfree(umem); return ret; } @@ -1479,10 +1527,10 @@ int arch_kexec_kernel_image_probe(struct kimage *image, void *buf, /* Get exclude memory ranges needed for setting up kdump segments */ ret = get_exclude_memory_ranges(&(image->arch.exclude_ranges)); - if (ret) + if (ret) { pr_err("Failed to setup exclude memory ranges for buffer lookup\n"); - /* Return this until all changes for panic kernel are in */ - return -EOPNOTSUPP; + return ret; + } } return kexec_image_probe_default(image, buf, buf_len);