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 21F3EC87FD2 for ; Mon, 11 Aug 2025 09:28:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=mn6yGCgIfkqUqRIzMPkZRCyDdMUzEhApvE49oVqcvo0=; b=piRBhwQMW2GapuCU7dD2gRpUyH rUTq3jxbfAKMCQr6kpC7fZvRETSU3wKn6YidbSVXRu6kgPIg7rn/ObTnwiCTv0rPtFF/NY5clxaBk A6shRvPGw1FAh7034MhJ0QCl5rHpVIkQzW3MdT/wdvjEZlreLVK855yQ3gxsPjIcdWM5JZ6MzrRAC 7BBb/EF9wc3LqeD/lY67ziQ2sMUJooAEJzn/G5M/YuPw0MDtfNoGN7KGzWrwOTntO11jPA+dd0Ogl kR7ehIMZQ6ejkIR7FwBT2AH6s9cySjaZxFCFaJqyqRFn4J3EH36PyBCDYtTQn0uuj/O7g8ErHnIkD GOdhqlTQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1ulOpQ-000000076wa-3jkL; Mon, 11 Aug 2025 09:28:28 +0000 Received: from out-183.mta1.migadu.com ([95.215.58.183]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1ulOpO-000000076lZ-11F5 for kexec@lists.infradead.org; Mon, 11 Aug 2025 09:28:27 +0000 X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1754904491; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=mn6yGCgIfkqUqRIzMPkZRCyDdMUzEhApvE49oVqcvo0=; b=FBkchM+oKFunptI/GonLa8A971t0vOUJRpSTuUu1uo3GD5p/4CJaRBj3DOaSI+upBgQjI1 0kRrxqpEG1a1PyQwR3GxtXFAroLuvQyOAsNJUexLT72W2BwtQL3kb3raTMXH8nWm8/btDR OeW3oQyHT9ieBvmxlunj/quxeNvbQVw= From: Youling Tang To: Huacai Chen Cc: WANG Xuerui , Baoquan He , kexec@lists.infradead.org, loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, youling.tang@linux.dev, Youling Tang Subject: [PATCH 0/6] Add kexec_file support for LoongArch Date: Mon, 11 Aug 2025 17:26:53 +0800 Message-Id: <20250811092659.14903-1-youling.tang@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250811_022826_468581_346012DF X-CRM114-Status: UNSURE ( 9.67 ) X-CRM114-Notice: Please train this message. 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: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org From: Youling Tang This patchset implement kexec_file_load() support on LoongArch. This patch series enables us to load the LoongArch vmlinuz.efi or vmlinux.efi by specifying its file decriptor, instead of user-filled buffer via kexec_load() syscall. To use kexec_file_load() system call, instead of kexec_load(), at kexec command, '-s' options must be specified. kexec-tools needs to apply the corresponding patches. These patches can be found in repository [1] and will be submitted to the kexec-tools community later. The basic usage of kexec_file is: 1) Load second kernel image: # kexec -s -l vmlinuz.efi --initrd=initrd.img --reuse-cmdline 2) Startup second kernel: # kexec -e For kdump: 1) Load capture kernel image: # kexec -s -p vmlinuz.efi --initrd=initrd.img --reuse-cmdline 2) Do something to crash, like: # echo c > /proc/sysrq-trigger Link: [1] https://github.com/tangyouling/kexec-tools/commits/main/ Youling Tang (6): LoongArch: Add struct loongarch_image_header for kernel image LoongArch: Add kexec_file support LoongArch/kexec_file: Add initrd loading LoongArch/kexec_file: Add crash dump support LoongArch/kexec_file: Add "mem" parameter to limit memory usage of kdump kernel LoongArch: Enable CONFIG_KEXEC_FILE arch/loongarch/Kconfig | 8 + arch/loongarch/configs/loongson3_defconfig | 1 + arch/loongarch/include/asm/image.h | 58 +++++ arch/loongarch/include/asm/kexec.h | 12 ++ arch/loongarch/kernel/Makefile | 1 + arch/loongarch/kernel/kexec_image.c | 112 ++++++++++ arch/loongarch/kernel/machine_kexec.c | 33 ++- arch/loongarch/kernel/machine_kexec_file.c | 234 +++++++++++++++++++++ 8 files changed, 448 insertions(+), 11 deletions(-) create mode 100644 arch/loongarch/include/asm/image.h create mode 100644 arch/loongarch/kernel/kexec_image.c create mode 100644 arch/loongarch/kernel/machine_kexec_file.c -- 2.34.1