From patchwork Fri Oct 14 07:48:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xianting Tian X-Patchwork-Id: 13006737 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 97C31C4332F for ; Fri, 14 Oct 2022 07:51:08 +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=bhO/eIkdwL358f/HxSJLWHA9dTsG1k1od2UarzDoDDk=; b=fSD4FSLG85SA+R IsOKaGf5nB2lTVLbXFassr2BiaSd1UU6svhRQu44sLsTYwKGdiiMn3SOY8TESzA9nKNZ78YqKw0Lc 7Q/mBoGmWjaDy80bT7uc1XbsL1oELNOH6BEwhVeaNue9qOYgqJ8hVfJwMxP3hQEgGV4wbbdLxKO2Y WxUS+fEMV0d5gswKfzezNUntCa2bpdBgR6ifk9JdW4luBb1nnrY8+/m18KiTJhQDsoBCfnDdMHhaW jILRg2f/lWn9hGLJ0HeEoLYEY7sPoEsPenq8QhtQe4iTQEpTL5OueTCEq0wAcPCEtc4rw1AuhRWPD hJ5r3E2mqq3rjVFA/4uA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ojFSx-00DxM9-Ej; Fri, 14 Oct 2022 07:50:47 +0000 Received: from out30-133.freemail.mail.aliyun.com ([115.124.30.133]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ojFSq-00Dx77-Fk; Fri, 14 Oct 2022 07:50:41 +0000 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R181e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046050;MF=xianting.tian@linux.alibaba.com;NM=1;PH=DS;RN=23;SR=0;TI=SMTPD_---0VS6v5Dj_1665733713; Received: from localhost.localdomain(mailfrom:xianting.tian@linux.alibaba.com fp:SMTPD_---0VS6v5Dj_1665733713) by smtp.aliyun-inc.com; Fri, 14 Oct 2022 15:48:34 +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 2/2] Documentation: kdump: describe VMCOREINFO export for RISCV64 Date: Fri, 14 Oct 2022 15:48:10 +0800 Message-Id: <20221014074810.4471-3-xianting.tian@linux.alibaba.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20221014074810.4471-1-xianting.tian@linux.alibaba.com> References: <20221014074810.4471-1-xianting.tian@linux.alibaba.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221014_005040_732745_8C70BF52 X-CRM114-Status: UNSURE ( 5.22 ) X-CRM114-Notice: Please train this message. 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 The following interrelated definitions and ranges are needed by the kdump crash tool, they are exported by "arch/riscv/kernel/crash_core.c": VA_BITS, PAGE_OFFSET, phys_ram_base, MODULES_VADDR ~ MODULES_END, VMALLOC_START ~ VMALLOC_END, VMEMMAP_START ~ VMEMMAP_END, KASAN_SHADOW_START ~ KASAN_SHADOW_END, KERNEL_LINK_ADDR ~ ADDRESS_SPACE_END Document these RISCV64 exports above. Signed-off-by: Xianting Tian --- .../admin-guide/kdump/vmcoreinfo.rst | 31 +++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/Documentation/admin-guide/kdump/vmcoreinfo.rst b/Documentation/admin-guide/kdump/vmcoreinfo.rst index 6726f439958c..6c7a1728de22 100644 --- a/Documentation/admin-guide/kdump/vmcoreinfo.rst +++ b/Documentation/admin-guide/kdump/vmcoreinfo.rst @@ -595,3 +595,34 @@ X2TLB ----- Indicates whether the crashed kernel enabled SH extended mode. + +RISCV64 +======= + +VA_BITS +------- + +The maximum number of bits for virtual addresses. Used to compute the +virtual memory ranges. + +PAGE_OFFSET +----------- + +Indicates the virtual kernel start address of direct-mapped RAM region. + +phys_ram_base +------------- + +Indicates the start physical RAM address. + +---------------------------------------------------------------------------------------------------------------------------------------------------- +MODULES_VADDR|MODULES_END|VMALLOC_START|VMALLOC_END|VMEMMAP_START|VMEMMAP_END|KASAN_SHADOW_START|KASAN_SHADOW_END|KERNEL_LINK_ADDR|ADDRESS_SPACE_END +---------------------------------------------------------------------------------------------------------------------------------------------------- + +Used to get the correct ranges: + + * MODULES_VADDR ~ MODULES_END : Kernel module space. + * VMALLOC_START ~ VMALLOC_END : vmalloc() / ioremap() space. + * VMEMMAP_START ~ VMEMMAP_END : vmemmap region, used for struct page array. + * KASAN_SHADOW_START ~ KASAN_SHADOW_END : kasan shadow space. + * KERNEL_LINK_ADDR ~ ADDRESS_SPACE_END : Kernel link and BPF space.