From patchwork Mon Jul 25 01:45:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xianting Tian X-Patchwork-Id: 12927681 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 349D7C43334 for ; Mon, 25 Jul 2022 01:46:19 +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=tdO7btpv3fIb/YqL65ZJito3764d5d9AgOpmR5anXk0=; b=ZcB6sBqVQZHJ/J LLe9McwZhNLJU5r+5YcIF/9iN4n/eWGYz0BfQ+tsLkl4GGEch6PBXapccnmVZ7WaasqQf3Fpi+AX1 km4RzcEGaJt3WHz92xZGeuge6QAGaDuBL8I4uXI1tm4SMRPyQsEOdfwxc73w39f0Uu/C0sBgEKp1w vfwvy40NtG/FuxiCssDPr5zRqJUZSJG8JmDMJlQLY59wFp96Zma+o+C0ptHwq5OLIQAEiYDqdoqLt 6u0KPqsn8NloaYEOfodBWC4WbuZTvhEO2qjeDkSxO/3eqpu1Uy83MuTqdzn4Zmwu12FuH8bfCByTR /WVc+xs20h6INysV5BPw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oFnAf-0008VP-Hy; Mon, 25 Jul 2022 01:46:09 +0000 Received: from out30-131.freemail.mail.aliyun.com ([115.124.30.131]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oFnAP-0008B5-K0; Mon, 25 Jul 2022 01:45:55 +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=ay29a033018046059;MF=xianting.tian@linux.alibaba.com;NM=1;PH=DS;RN=22;SR=0;TI=SMTPD_---0VKFpxwI_1658713548; Received: from localhost(mailfrom:xianting.tian@linux.alibaba.com fp:SMTPD_---0VKFpxwI_1658713548) by smtp.aliyun-inc.com; Mon, 25 Jul 2022 09:45:49 +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: [RESEND PATCH V2 5/5] riscv: crash_core: Export kernel vm layout, phys_ram_base Date: Mon, 25 Jul 2022 09:45:39 +0800 Message-Id: <20220725014539.1037627-6-xianting.tian@linux.alibaba.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220725014539.1037627-1-xianting.tian@linux.alibaba.com> References: <20220725014539.1037627-1-xianting.tian@linux.alibaba.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220724_184553_850927_992E0B5F X-CRM114-Status: UNSURE ( 6.83 ) 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 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.