From patchwork Wed Aug 11 08:50:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 12430467 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 763EEC4338F for ; Wed, 11 Aug 2021 08:51:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 59064610CC for ; Wed, 11 Aug 2021 08:51:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236532AbhHKIwT (ORCPT ); Wed, 11 Aug 2021 04:52:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33624 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236433AbhHKIwA (ORCPT ); Wed, 11 Aug 2021 04:52:00 -0400 Received: from andre.telenet-ops.be (andre.telenet-ops.be [IPv6:2a02:1800:120:4::f00:15]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A654EC06179F for ; Wed, 11 Aug 2021 01:51:35 -0700 (PDT) Received: from ramsan.of.borg ([IPv6:2a02:1810:ac12:ed20:438:1ff1:1071:f524]) by andre.telenet-ops.be with bizsmtp id g8rG2500H1gJxCh018rGYY; Wed, 11 Aug 2021 10:51:32 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1mDjxD-001yaB-TH; Wed, 11 Aug 2021 10:51:15 +0200 Received: from geert by rox.of.borg with local (Exim 4.93) (envelope-from ) id 1mDjxD-0058wf-87; Wed, 11 Aug 2021 10:51:15 +0200 From: Geert Uytterhoeven To: Rob Herring , Russell King , Nicolas Pitre , Ard Biesheuvel , Linus Walleij , Catalin Marinas , Will Deacon , Thomas Bogendoerfer , Nick Kossifidis , Paul Walmsley , Palmer Dabbelt , Albert Ou , Frank Rowand , Dave Young Cc: Baoquan He , Vivek Goyal , Mike Rapoport , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-riscv@lists.infradead.org, kexec@lists.infradead.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH v5 0/9] Add generic support for kdump DT properties Date: Wed, 11 Aug 2021 10:50:58 +0200 Message-Id: X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Hi all, This patch series adds generic support for parsing DT properties related to crash dump kernels ("linux,elfcorehdr" and "linux,elfcorehdr" under the "/chosen" node), makes use of it on arm32, and performs a few cleanups. It is an evolution of the combination of [1] and [2]. The series consists of 6 parts: 1. Patch 1 prepares architecture-specific code (needed for MIPS only) to avoid duplicating elf core header reservation later. 2. Patch 2 prepares the visibility of variables used to hold information retrieved from the DT properties. 3. Patches 3-5 add support to the FDT core for handling the properties. This can co-exist safely with architecture-specific handling, until the latter has been removed. 4. Patch 6 removes the non-standard handling of "linux,elfcorehdr" on riscv. 5. Patches 7-8 convert arm64 to use the generic handling instead of its own implementation. 6. Patch 9 adds support for kdump properties to arm32. The corresponding patch for kexec-tools is "[PATCH] arm: kdump: Add DT properties to crash dump kernel's DTB"[3], which is still valid. Changes compared to v4[4]: - New patch "[PATCH v5 1/9] MIPS: Avoid future duplicate elf core header reservation", - Drop "memblock: Add variables for usable memory limitation", as this is now handled in FDT core code, - Make ELFCORE_ADDR_{MAX,ERR} visible, too, - Handle the actual elf core header reservation and memory capping in FDT core code, - Add Reviewed-by, Acked-by, - Remove all architecture-specific handling on arm64, - Drop "arm64: kdump: Use IS_ENABLED(CONFIG_CRASH_DUMP) instead of #ifdef", as the affected code is gone, - Remove the addition of "linux,elfcorehdr" and "linux,usable-memory-range" handling to arch/arm/mm/init.c. Changes compared to older versions: - Make elfcorehdr_{addr,size} always visible, - Add variables for usable memory limitation, - Use IS_ENABLED() instead of #ifdef (incl. initrd and arm64), - Clarify what architecture-specific code is still responsible for, - Add generic support for parsing linux,usable-memory-range, - Remove custom linux,usable-memory-range parsing on arm64, - Use generic handling on ARM. This has been tested with kexec/kdump on arm32 and arm64, and boot-tested on riscv64 and DT-less MIPS. Thanks! [1] "[PATCH v3] ARM: Parse kdump DT properties" https://lore.kernel.org/r/20210317113130.2554368-1-geert+renesas@glider.be/ [2] "[PATCH 0/3] Add generic-support for linux,elfcorehdr and fix riscv" https://lore.kernel.org/r/cover.1623780059.git.geert+renesas@glider.be/ [3] "[PATCH] arm: kdump: Add DT properties to crash dump kernel's DTB" https://lore.kernel.org/r/20200902154129.6358-1-geert+renesas@glider.be/ [4] "[PATCH v4 00/10] Add generic support for kdump DT properties" https://lore.kernel.org/r/cover.1626266516.git.geert+renesas@glider.be Geert Uytterhoeven (9): MIPS: Avoid future duplicate elf core header reservation crash_dump: Make elfcorehdr address/size symbols always visible of: fdt: Add generic support for handling elf core headers property of: fdt: Add generic support for handling usable memory range property of: fdt: Use IS_ENABLED(CONFIG_BLK_DEV_INITRD) instead of #ifdef riscv: Remove non-standard linux,elfcorehdr handling arm64: kdump: Remove custom linux,elfcorehdr handling arm64: kdump: Remove custom linux,usable-memory-range handling ARM: uncompress: Parse "linux,usable-memory-range" DT property Documentation/devicetree/bindings/chosen.txt | 12 +-- .../arm/boot/compressed/fdt_check_mem_start.c | 48 ++++++++-- arch/arm64/mm/init.c | 88 ----------------- arch/mips/kernel/setup.c | 3 +- arch/riscv/mm/init.c | 20 ---- drivers/of/fdt.c | 94 +++++++++++++++++-- include/linux/crash_dump.h | 3 +- 7 files changed, 139 insertions(+), 129 deletions(-)