From patchwork Tue Aug 2 12:18:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xianting Tian X-Patchwork-Id: 12934590 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 2DB87C19F2D for ; Tue, 2 Aug 2022 12:19:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ZfrFN/L3s+8LJZv4hKNhODASbnyLadSmsU46RiAGkNE=; b=gt6SaIBz9Qri1H utD5FhnrFelnB7TIr+Rq7gBdmwHafTAzeX6E8eMhDmjlt0CjftoZYCulz9Z/dLU9zJhksRz5eCtGZ lraHHTDOv3CkhTsqAATXh4kEcwwODKSzTOwkVJT4FSyXzILgB5PBx6cWO7tcQFP0gHTWx1FuNYOk5 pwgelfW9lYuilq0QGdjok9hl3GLCTOQd7JLIzzsWeSzPayfzjIO2TjS8Oyfc3OmJQnDTnDlbq3PSq PYAbMW/hxTZOg85iwS0wyBouXoBiuQ2q4GIqqzoDIREHrGtaaDtI2g7fyxnfu9m4x3zEJU4B29RF2 IubC5wizNMfGUUBsr9Zg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oIqrD-00DsDS-5I; Tue, 02 Aug 2022 12:18:43 +0000 Received: from out30-45.freemail.mail.aliyun.com ([115.124.30.45]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oIqr0-00Drz6-TE; Tue, 02 Aug 2022 12:18:34 +0000 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R131e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046056;MF=xianting.tian@linux.alibaba.com;NM=1;PH=DS;RN=24;SR=0;TI=SMTPD_---0VLBiqE1_1659442704; Received: from localhost(mailfrom:xianting.tian@linux.alibaba.com fp:SMTPD_---0VLBiqE1_1659442704) by smtp.aliyun-inc.com; Tue, 02 Aug 2022 20:18:24 +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, huanyi.xj@alibaba-inc.com, heinrich.schuchardt@canonical.com, k-hagio-ab@nec.com, hschauhan@nulltrace.org, yixun.lan@gmail.com, Xianting Tian Subject: [PATCH V5 2/6] RISC-V: Add arch_crash_save_vmcoreinfo support Date: Tue, 2 Aug 2022 20:18:14 +0800 Message-Id: <20220802121818.2201268-3-xianting.tian@linux.alibaba.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220802121818.2201268-1-xianting.tian@linux.alibaba.com> References: <20220802121818.2201268-1-xianting.tian@linux.alibaba.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220802_051831_183601_751E5018 X-CRM114-Status: GOOD ( 13.09 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add arch_crash_save_vmcoreinfo(), which exports VM layout(MODULES, VMALLOC, VMEMMAP and KERNEL_LINK_ADDR ranges), va bits and ram base to 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 = 5 * PAGE_OFFSET = 0xff60000000000000 * Linux Kernel 5.17 ~ * PGTABLE_LEVELS = 4 * PAGE_OFFSET = 0xffffaf8000000000 * Linux Kernel 4.19 ~ * PGTABLE_LEVELS = 3 * PAGE_OFFSET = 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-$(CONFIG_KGDB) += kgdb.o obj-$(CONFIG_KEXEC_CORE) += kexec_relocate.o crash_save_regs.o machine_kexec.o obj-$(CONFIG_KEXEC_FILE) += elf_kexec.o machine_kexec_file.o obj-$(CONFIG_CRASH_DUMP) += crash_dump.o +obj-$(CONFIG_CRASH_CORE) += crash_core.o obj-$(CONFIG_JUMP_LABEL) += jump_label.o 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)=0x%lx\n", PAGE_OFFSET); + vmcoreinfo_append_str("NUMBER(VMALLOC_START)=0x%lx\n", VMALLOC_START); + vmcoreinfo_append_str("NUMBER(VMALLOC_END)=0x%lx\n", VMALLOC_END); + vmcoreinfo_append_str("NUMBER(VMEMMAP_START)=0x%lx\n", VMEMMAP_START); + vmcoreinfo_append_str("NUMBER(VMEMMAP_END)=0x%lx\n", VMEMMAP_END); +#ifdef CONFIG_64BIT + vmcoreinfo_append_str("NUMBER(MODULES_VADDR)=0x%lx\n", MODULES_VADDR); + vmcoreinfo_append_str("NUMBER(MODULES_END)=0x%lx\n", MODULES_END); +#endif + + if (IS_ENABLED(CONFIG_64BIT)) { +#ifdef CONFIG_KASAN + vmcoreinfo_append_str("NUMBER(KASAN_SHADOW_START)=0x%lx\n", KASAN_SHADOW_START); + vmcoreinfo_append_str("NUMBER(KASAN_SHADOW_END)=0x%lx\n", KASAN_SHADOW_END); +#endif + vmcoreinfo_append_str("NUMBER(KERNEL_LINK_ADDR)=0x%lx\n", KERNEL_LINK_ADDR); + vmcoreinfo_append_str("NUMBER(ADDRESS_SPACE_END)=0x%lx\n", ADDRESS_SPACE_END); + } +}