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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3326FC43334 for ; Tue, 26 Jul 2022 09:38:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230370AbiGZJh6 (ORCPT ); Tue, 26 Jul 2022 05:37:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40294 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238195AbiGZJhr (ORCPT ); Tue, 26 Jul 2022 05:37:47 -0400 Received: from out30-133.freemail.mail.aliyun.com (out30-133.freemail.mail.aliyun.com [115.124.30.133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6BF142F3A9; Tue, 26 Jul 2022 02:37:44 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R171e4;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=22;SR=0;TI=SMTPD_---0VKUwha8_1658828258; Received: from localhost(mailfrom:xianting.tian@linux.alibaba.com fp:SMTPD_---0VKUwha8_1658828258) by smtp.aliyun-inc.com; Tue, 26 Jul 2022 17:37:39 +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 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, Xianting Tian Subject: [PATCH V4 5/5] riscv: crash_core: Export kernel vm layout, phys_ram_base Date: Tue, 26 Jul 2022 17:37:29 +0800 Message-Id: <20220726093729.1231867-6-xianting.tian@linux.alibaba.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220726093729.1231867-1-xianting.tian@linux.alibaba.com> References: <20220726093729.1231867-1-xianting.tian@linux.alibaba.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org These infos are needed by the kdump crash tool. Since these values change from time to time, it is preferable to export them via vmcoreinfo than to change the crash's code frequently. 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 8419019b6a88..6b76284a503c 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. -- 2.17.1