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 X-Spam-Level: X-Spam-Status: No, score=-8.2 required=3.0 tests=BAYES_00, BODY_QUOTE_MALF_MSGID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E2A66C433E0 for ; Wed, 29 Jul 2020 11:43:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C722720672 for ; Wed, 29 Jul 2020 11:43:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726918AbgG2Lnw (ORCPT ); Wed, 29 Jul 2020 07:43:52 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:59318 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726880AbgG2Lnv (ORCPT ); Wed, 29 Jul 2020 07:43:51 -0400 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 06TBXDHU093448; Wed, 29 Jul 2020 07:43:43 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 32jy8vq20f-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 29 Jul 2020 07:43:43 -0400 Received: from m0098396.ppops.net (m0098396.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 06TBXUv5094409; Wed, 29 Jul 2020 07:43:43 -0400 Received: from ppma06ams.nl.ibm.com (66.31.33a9.ip4.static.sl-reverse.com [169.51.49.102]) by mx0a-001b2d01.pphosted.com with ESMTP id 32jy8vq1yq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 29 Jul 2020 07:43:43 -0400 Received: from pps.filterd (ppma06ams.nl.ibm.com [127.0.0.1]) by ppma06ams.nl.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 06TBgjBI016135; Wed, 29 Jul 2020 11:43:41 GMT Received: from b06cxnps3074.portsmouth.uk.ibm.com (d06relay09.portsmouth.uk.ibm.com [9.149.109.194]) by ppma06ams.nl.ibm.com with ESMTP id 32gcqgn04n-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 29 Jul 2020 11:43:40 +0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 06TBhcfX29295062 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 29 Jul 2020 11:43:38 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F37E052059; Wed, 29 Jul 2020 11:43:37 +0000 (GMT) Received: from [192.168.0.8] (unknown [9.79.217.86]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id A3C9A52051; Wed, 29 Jul 2020 11:43:34 +0000 (GMT) Subject: [PATCH v6 09/11] ppc64/kexec_file: add appropriate regions for memory reserve map From: Hari Bathini To: Michael Ellerman Cc: Pingfan Liu , Thiago Jung Bauermann , Mahesh J Salgaonkar , Sourabh Jain , Vivek Goyal , Dave Young , Petr Tesarik , Pingfan Liu , linuxppc-dev , Kexec-ml , lkml , Pingfan Liu , Eric Biederman , Thiago Jung Bauermann , Mimi Zohar , Nayna Jain , Andrew Morton Date: Wed, 29 Jul 2020 17:13:33 +0530 Message-ID: <159602300473.575379.4218568032039284448.stgit@hbathini> In-Reply-To: <159602259854.575379.16910915605574571585.stgit@hbathini> References: <159602259854.575379.16910915605574571585.stgit@hbathini> User-Agent: StGit/0.21 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-07-29_04:2020-07-29,2020-07-29 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 phishscore=0 mlxscore=0 bulkscore=0 malwarescore=0 adultscore=0 clxscore=1015 lowpriorityscore=0 suspectscore=0 mlxlogscore=999 spamscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007290075 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- v5 -> v6: * Unchanged. v4 -> v5: * Unchanged. 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 0d280d097cd6..f13c5b8399e1 100644 --- a/arch/powerpc/kexec/file_load_64.c +++ b/arch/powerpc/kexec/file_load_64.c @@ -205,6 +205,34 @@ static int get_crash_memory_ranges(struct crash_mem **mem_ranges) return ret; } +/** + * 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_mem_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 @@ -897,8 +925,8 @@ 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) @@ -941,7 +969,27 @@ 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; } @@ -1024,10 +1072,10 @@ 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);