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 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 94741C433FE for ; Thu, 20 Oct 2022 02:09:10 +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:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ddzzy/Q+HB+cGfYKo/UQaR3oBMQYh/IHKqQUhzG5hLo=; b=kmXcAXsMgZaN2r uf8qQsg5ZyXMETX04mf3Y6Yo5rV7i8QkFsyl6DICjCgi/hGk1HRSUS4bmksxxwe4keF+F026EqCvv pN6a6EAunD2gQgaAKE/T18Hn7LuLv5NqyxE/4OeoIqbSi4AF861I+IA1soh14JP/h/Yduvm8SoZUE XxhwVfld4Eku+EZGtwD84DHa1PIuQk0u6NbRYVykE32vNHLjxcN9U+EeRO3DxQNPxXhDy7fW3KZpf rxNyPPvPbjEEntyPRSHIxp5PRF4rB6jZAAtcHbwiXzZa5ZdPY5wfRhe6wWiGIxjrUU3Jrr318+z4w rToQdeUKXVUlEpWYo/gw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1olKzX-009PKb-Me; Thu, 20 Oct 2022 02:09:03 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1olKzU-009PJ6-5P for kexec@lists.infradead.org; Thu, 20 Oct 2022 02:09:01 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1666231738; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=Ba5NE9Dt+mVGgzTdquEVzfX/7nF3Hbru1aJHQKnQt9M=; b=VBS2ZEEUwYJmZ4F5skzJTW3/HVClVUwZsLvTeElp1rto2BQ7zVsIquxi2Nx98og5p0nhG+ BL1SaHL/OgMkLkZaGmnCD+Uc7uyPUToRZ1i24CqAdhA/AH51zqJOclk3JWdtIw9EOZutEL gKKHAyphNV8aBV7JUEg/OIE+NVixN4c= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-220-kT1rBtH6NWe_Eb20E9SHwA-1; Wed, 19 Oct 2022 22:08:51 -0400 X-MC-Unique: kT1rBtH6NWe_Eb20E9SHwA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 1BA121C068C2; Thu, 20 Oct 2022 02:08:51 +0000 (UTC) Received: from localhost (ovpn-12-35.pek2.redhat.com [10.72.12.35]) by smtp.corp.redhat.com (Postfix) with ESMTPS id F0D58140EBF3; Thu, 20 Oct 2022 02:08:48 +0000 (UTC) Date: Thu, 20 Oct 2022 10:08:45 +0800 From: Baoquan He To: Xianting Tian Cc: 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, vgoyal@redhat.com, dyoung@redhat.com, corbet@lwn.net, Conor.Dooley@microchip.com, bagasdotme@gmail.com, k-hagio-ab@nec.com, lijiang@redhat.com, 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, hschauhan@nulltrace.org, yixun.lan@gmail.com Subject: Re: [PATCH V4 1/2] RISC-V: Add arch_crash_save_vmcoreinfo support Message-ID: References: <20221019103623.7008-1-xianting.tian@linux.alibaba.com> <20221019103623.7008-2-xianting.tian@linux.alibaba.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20221019103623.7008-2-xianting.tian@linux.alibaba.com> X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221019_190900_322447_B0E76F10 X-CRM114-Status: GOOD ( 22.03 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org On 10/19/22 at 06:36pm, Xianting Tian wrote: > Add arch_crash_save_vmcoreinfo(), which exports VM layout(MODULES, VMALLOC, > VMEMMAP ranges and KERNEL_LINK_ADDR), va bits and ram base for vmcore. > > Default pagetable levels and PAGE_OFFSET aren't same for different kernel > version as below. For pagetable levels, it sets sv57 by default and falls > back to setting sv48 at boot time if sv57 is not supported by the hardware. > > For ram base, the default value is 0x80200000 for qemu riscv64 env and, > for example, is 0x200000 on the 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 | 23 +++++++++++++++++++++++ > 2 files changed, 24 insertions(+) > create mode 100644 arch/riscv/kernel/crash_core.c > > diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile > index db6e4b1294ba..4cf303a779ab 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..3e889d0ed7bd > --- /dev/null > +++ b/arch/riscv/kernel/crash_core.c > @@ -0,0 +1,23 @@ > +// 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)) > + vmcoreinfo_append_str("NUMBER(KERNEL_LINK_ADDR)=0x%lx\n", KERNEL_LINK_ADDR); Wondering why you don't put KERNEL_LINK_ADDR exporting into the above ifdeffery scope, with that you can save one line of "IS_ENABLED(CONFIG_64BIT)". _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec