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GET /api/patches/2218954/?format=api
{ "id": 2218954, "url": "http://patchwork.ozlabs.org/api/patches/2218954/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260402072701.628293-2-ruanjinjie@huawei.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20260402072701.628293-2-ruanjinjie@huawei.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260402072701.628293-2-ruanjinjie@huawei.com/", "date": "2026-04-02T07:26:47", "name": "[v12,01/15] riscv: kexec_file: Fix crashk_low_res not exclude bug", "commit_ref": null, "pull_url": null, "state": "handled-elsewhere", "archived": false, "hash": "a96c778c1e2f861a76d8418421aa707a5e543da1", "submitter": { "id": 84791, "url": "http://patchwork.ozlabs.org/api/people/84791/?format=api", "name": "Jinjie Ruan", "email": "ruanjinjie@huawei.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260402072701.628293-2-ruanjinjie@huawei.com/mbox/", "series": [ { "id": 498443, "url": "http://patchwork.ozlabs.org/api/series/498443/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=498443", "date": "2026-04-02T07:26:46", "name": "arm64/riscv: Add support for crashkernel CMA reservation", "version": 12, "mbox": "http://patchwork.ozlabs.org/series/498443/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2218954/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2218954/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19191-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=huawei.com header.i=@huawei.com header.a=rsa-sha256\n header.s=dkim header.b=xXm5VJ0g;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=112.213.38.117; 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a=rsa-sha256; d=huawei.com; s=dkim;\n\tc=relaxed/relaxed; q=dns/txt;\n\th=From;\n\tbh=MS+svJjwX+WERXmMYEnQYyI5Mc94faKy2CdWQtmAb8o=;\n\tb=xXm5VJ0gzjFo5FI6ifJNt2lYYB9fpiEFwKvKrblrK5cZ5X5QR0VEIsC4iprJlRC3urHXpb75e\n\tXRqctvGI7uS/yew73xY6QXp4G2a2n8T+yKdd4nuZDj5kccyoaXIEo3Ic4MOgmKWA5NZ5J2KJg3p\n\tVaGi5GtRXJK44kah7P/dE2Q=", "From": "Jinjie Ruan <ruanjinjie@huawei.com>", "To": "<corbet@lwn.net>, <skhan@linuxfoundation.org>, <catalin.marinas@arm.com>,\n\t<will@kernel.org>, <chenhuacai@kernel.org>, <kernel@xen0n.name>,\n\t<maddy@linux.ibm.com>, <mpe@ellerman.id.au>, <npiggin@gmail.com>,\n\t<chleroy@kernel.org>, <pjw@kernel.org>, <palmer@dabbelt.com>,\n\t<aou@eecs.berkeley.edu>, <alex@ghiti.fr>, <tglx@kernel.org>,\n\t<mingo@redhat.com>, <bp@alien8.de>, <dave.hansen@linux.intel.com>,\n\t<hpa@zytor.com>, <robh@kernel.org>, <saravanak@kernel.org>,\n\t<akpm@linux-foundation.org>, <bhe@redhat.com>, <vgoyal@redhat.com>,\n\t<dyoung@redhat.com>, <rdunlap@infradead.org>, <peterz@infradead.org>,\n\t<pawan.kumar.gupta@linux.intel.com>, <feng.tang@linux.alibaba.com>,\n\t<dapeng1.mi@linux.intel.com>, <kees@kernel.org>, <elver@google.com>,\n\t<paulmck@kernel.org>, <lirongqing@baidu.com>, <rppt@kernel.org>,\n\t<leitao@debian.org>, <ardb@kernel.org>, <jbohac@suse.cz>,\n\t<cfsworks@gmail.com>, <tangyouling@kylinos.cn>, <sourabhjain@linux.ibm.com>,\n\t<ritesh.list@gmail.com>, <hbathini@linux.ibm.com>, <eajames@linux.ibm.com>,\n\t<guoren@kernel.org>, <songshuaishuai@tinylab.org>, <kevin.brodsky@arm.com>,\n\t<vishal.moola@gmail.com>, <junhui.liu@pigmoral.tech>, <coxu@redhat.com>,\n\t<fuqiang.wang@easystack.cn>, <liaoyuanhong@vivo.com>,\n\t<takahiro.akashi@linaro.org>, <james.morse@arm.com>, <lizhengyu3@huawei.com>,\n\t<x86@kernel.org>, <linux-doc@vger.kernel.org>,\n\t<linux-kernel@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>,\n\t<loongarch@lists.linux.dev>, <linuxppc-dev@lists.ozlabs.org>,\n\t<linux-riscv@lists.infradead.org>, <devicetree@vger.kernel.org>,\n\t<kexec@lists.infradead.org>", "CC": "<ruanjinjie@huawei.com>", "Subject": "[PATCH v12 01/15] riscv: kexec_file: Fix crashk_low_res not exclude\n bug", "Date": "Thu, 2 Apr 2026 15:26:47 +0800", "Message-ID": "<20260402072701.628293-2-ruanjinjie@huawei.com>", "X-Mailer": "git-send-email 2.34.1", "In-Reply-To": "<20260402072701.628293-1-ruanjinjie@huawei.com>", "References": "<20260402072701.628293-1-ruanjinjie@huawei.com>", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": "<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>", "Precedence": "list", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-Originating-IP": "[10.90.53.73]", "X-ClientProxiedBy": "kwepems100002.china.huawei.com (7.221.188.206) To\n dggpemf500011.china.huawei.com (7.185.36.131)", "X-Spam-Status": "No, score=-0.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tDKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS autolearn=disabled\n\tversion=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "As done in commit 944a45abfabc (\"arm64: kdump: Reimplement crashkernel=X\")\nand commit 4831be702b95 (\"arm64/kexec: Fix missing extra range for\ncrashkres_low.\") for arm64, while implementing crashkernel=X,[high,low],\nriscv should have excluded the \"crashk_low_res\" reserved ranges from\nthe crash kernel memory to prevent them from being exported through\n/proc/vmcore, and the exclusion would need an extra crash_mem range.\n\nJust simply tested on qemu with crashkernel=4G with kexec in [1] mentioned\nin [2]. And the second kernel can be started normally.\n\n\t# dmesg | grep crash\n\t[ 0.000000] crashkernel low memory reserved: 0xf8000000 - 0x100000000 (128 MB)\n\t[ 0.000000] crashkernel reserved: 0x000000017fe00000 - 0x000000027fe00000 (4096 MB)\n\nCc: Guo Ren <guoren@kernel.org>\nCc: Baoquan He <bhe@redhat.com>\n[1]: https://github.com/chenjh005/kexec-tools/tree/build-test-riscv-v2\n[2]: https://lore.kernel.org/all/20230726175000.2536220-1-chenjiahao16@huawei.com/\nFixes: 5882e5acf18d (\"riscv: kdump: Implement crashkernel=X,[high,low]\")\nReviewed-by: Guo Ren <guoren@kernel.org>\nSigned-off-by: Jinjie Ruan <ruanjinjie@huawei.com>\n---\n arch/riscv/kernel/machine_kexec_file.c | 14 +++++++++++---\n 1 file changed, 11 insertions(+), 3 deletions(-)", "diff": "diff --git a/arch/riscv/kernel/machine_kexec_file.c b/arch/riscv/kernel/machine_kexec_file.c\nindex 54e2d9552e93..3f7766057cac 100644\n--- a/arch/riscv/kernel/machine_kexec_file.c\n+++ b/arch/riscv/kernel/machine_kexec_file.c\n@@ -61,7 +61,7 @@ static int prepare_elf_headers(void **addr, unsigned long *sz)\n \tunsigned int nr_ranges;\n \tint ret;\n \n-\tnr_ranges = 1; /* For exclusion of crashkernel region */\n+\tnr_ranges = 2; /* For exclusion of crashkernel region */\n \twalk_system_ram_res(0, -1, &nr_ranges, get_nr_ram_ranges_callback);\n \n \tcmem = kmalloc_flex(*cmem, ranges, nr_ranges);\n@@ -76,8 +76,16 @@ static int prepare_elf_headers(void **addr, unsigned long *sz)\n \n \t/* Exclude crashkernel region */\n \tret = crash_exclude_mem_range(cmem, crashk_res.start, crashk_res.end);\n-\tif (!ret)\n-\t\tret = crash_prepare_elf64_headers(cmem, true, addr, sz);\n+\tif (ret)\n+\t\tgoto out;\n+\n+\tif (crashk_low_res.end) {\n+\t\tret = crash_exclude_mem_range(cmem, crashk_low_res.start, crashk_low_res.end);\n+\t\tif (ret)\n+\t\t\tgoto out;\n+\t}\n+\n+\tret = crash_prepare_elf64_headers(cmem, true, addr, sz);\n \n out:\n \tkfree(cmem);\n", "prefixes": [ "v12", "01/15" ] }