From nobody Sat Apr 11 14:14:00 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 40553C19F2D for ; Thu, 11 Aug 2022 07:42:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234467AbiHKHmY (ORCPT ); Thu, 11 Aug 2022 03:42:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47206 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234141AbiHKHmI (ORCPT ); Thu, 11 Aug 2022 03:42:08 -0400 Received: from out30-57.freemail.mail.aliyun.com (out30-57.freemail.mail.aliyun.com [115.124.30.57]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8804E91D2F; Thu, 11 Aug 2022 00:42:06 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R111e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045170;MF=xianting.tian@linux.alibaba.com;NM=1;PH=DS;RN=23;SR=0;TI=SMTPD_---0VLyMVhz_1660203719; Received: from localhost(mailfrom:xianting.tian@linux.alibaba.com fp:SMTPD_---0VLyMVhz_1660203719) by smtp.aliyun-inc.com; Thu, 11 Aug 2022 15:42:00 +0800 From: Xianting Tian To: paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, anup@brainfault.org, heiko@sntech.de, guoren@kernel.org, mick@ics.forth.gr, alexandre.ghiti@canonical.com, bhe@redhat.com, vgoyal@redhat.com, dyoung@redhat.com, corbet@lwn.net, Conor.Dooley@microchip.com Cc: kexec@lists.infradead.org, linux-doc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, crash-utility@redhat.com, heinrich.schuchardt@canonical.com, k-hagio-ab@nec.com, hschauhan@nulltrace.org, yixun.lan@gmail.com, Xianting Tian Subject: [PATCH V6 5/6] RISC-V: Add arch_crash_save_vmcoreinfo support Date: Thu, 11 Aug 2022 15:41:49 +0800 Message-Id: <20220811074150.3020189-6-xianting.tian@linux.alibaba.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220811074150.3020189-1-xianting.tian@linux.alibaba.com> References: <20220811074150.3020189-1-xianting.tian@linux.alibaba.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Add arch_crash_save_vmcoreinfo(), which exports VM layout(MODULES, VMALLOC, VMEMMAP and KERNEL_LINK_ADDR ranges), va bits and ram base for vmcore. Default pagetable levels and PAGE_OFFSET aren't same for different kernel version as below. For default pagetable levels, it sets sv57 on defaultly in latest kernel and do fallback to try to set sv48 on boot time if sv57 is not supported in current hardware. For ram base, the default value is 0x80200000 for qemu riscv64 env, 0x200000 for riscv64 SoC platform(eg, SoC platform of RISC-V XuanTie 910 CPU). * Linux Kernel 5.18 ~ * PGTABLE_LEVELS =3D 5 * PAGE_OFFSET =3D 0xff60000000000000 * Linux Kernel 5.17 ~ * PGTABLE_LEVELS =3D 4 * PAGE_OFFSET =3D 0xffffaf8000000000 * Linux Kernel 4.19 ~ * PGTABLE_LEVELS =3D 3 * PAGE_OFFSET =3D 0xffffffe000000000 Since these configurations change from time to time and version to version, it is preferable to export them via vmcoreinfo than to change the crash's code frequently, it can simplify the development of crash tool. Signed-off-by: Xianting Tian --- arch/riscv/kernel/Makefile | 1 + arch/riscv/kernel/crash_core.c | 29 +++++++++++++++++++++++++++++ 2 files changed, 30 insertions(+) create mode 100644 arch/riscv/kernel/crash_core.c diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile index 33bb60a354cd..5e149df58176 100644 --- a/arch/riscv/kernel/Makefile +++ b/arch/riscv/kernel/Makefile @@ -81,6 +81,7 @@ obj-$(CONFIG_KGDB) +=3D kgdb.o obj-$(CONFIG_KEXEC_CORE) +=3D kexec_relocate.o crash_save_regs.o machine_k= exec.o obj-$(CONFIG_KEXEC_FILE) +=3D elf_kexec.o machine_kexec_file.o obj-$(CONFIG_CRASH_DUMP) +=3D crash_dump.o +obj-$(CONFIG_CRASH_CORE) +=3D crash_core.o =20 obj-$(CONFIG_JUMP_LABEL) +=3D jump_label.o =20 diff --git a/arch/riscv/kernel/crash_core.c b/arch/riscv/kernel/crash_core.c new file mode 100644 index 000000000000..8d7f5ff108da --- /dev/null +++ b/arch/riscv/kernel/crash_core.c @@ -0,0 +1,29 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include +#include + +void arch_crash_save_vmcoreinfo(void) +{ + VMCOREINFO_NUMBER(VA_BITS); + VMCOREINFO_NUMBER(phys_ram_base); + + vmcoreinfo_append_str("NUMBER(PAGE_OFFSET)=3D0x%lx\n", PAGE_OFFSET); + vmcoreinfo_append_str("NUMBER(VMALLOC_START)=3D0x%lx\n", VMALLOC_START); + vmcoreinfo_append_str("NUMBER(VMALLOC_END)=3D0x%lx\n", VMALLOC_END); + vmcoreinfo_append_str("NUMBER(VMEMMAP_START)=3D0x%lx\n", VMEMMAP_START); + vmcoreinfo_append_str("NUMBER(VMEMMAP_END)=3D0x%lx\n", VMEMMAP_END); +#ifdef CONFIG_64BIT + vmcoreinfo_append_str("NUMBER(MODULES_VADDR)=3D0x%lx\n", MODULES_VADDR); + vmcoreinfo_append_str("NUMBER(MODULES_END)=3D0x%lx\n", MODULES_END); +#endif + + if (IS_ENABLED(CONFIG_64BIT)) { +#ifdef CONFIG_KASAN + vmcoreinfo_append_str("NUMBER(KASAN_SHADOW_START)=3D0x%lx\n", KASAN_SHAD= OW_START); + vmcoreinfo_append_str("NUMBER(KASAN_SHADOW_END)=3D0x%lx\n", KASAN_SHADOW= _END); +#endif + vmcoreinfo_append_str("NUMBER(KERNEL_LINK_ADDR)=3D0x%lx\n", KERNEL_LINK_= ADDR); + vmcoreinfo_append_str("NUMBER(ADDRESS_SPACE_END)=3D0x%lx\n", ADDRESS_SPA= CE_END); + } +} --=20 2.17.1