From patchwork Mon Jun 19 05:59:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baoquan He X-Patchwork-Id: 13284009 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 30542EB64DB for ; Mon, 19 Jun 2023 06:00:33 +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:MIME-Version: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:In-Reply-To:References: List-Owner; bh=MrGxU1Vh7fhHWvCFJUC9BMiYvB0d4AchNuqlnDwOKKM=; b=LTrOfNBa0jDKcQ X/Qi+PkcxQ2urLghKA5q7blPmlcW+AyDVlGC9q/7+M7PQAaeJoGGP3YKaAAgdk+kfkiNDac6IiHTv E+BgdZ0H3vWUMVqEo8o96gVwzUOucFPpwThXaE8O08Rk5yKafCEjiKE2uPFCXxSzvoOz0vhUGSsOq cEjNKHzj0YahgeJqKWGrBEh3PFepxVl5nixZhHJ2LMBGY/WEdEfmx0s0d3LIFJN5nLKvbmmM7YIcU yPeHWAd8JQC/wrWzXs9KrfKio3BQRjdctu/cCJppOkB/vd2C4DyC4CZr4jE7efdyPxcCZc8u2gyx6 3zhnCyNR4XBsQzaE+UAg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qB7vv-007WhO-3C; Mon, 19 Jun 2023 06:00:11 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qB7vs-007Wfr-2y for linux-arm-kernel@lists.infradead.org; Mon, 19 Jun 2023 06:00:10 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1687154405; 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: content-transfer-encoding:content-transfer-encoding; bh=1Z+NO+U3mF4VkZPV3TiZ9hDCsNGYkiNE2A8dRovLHfw=; b=OIDJGIUyECZX1fplz0t5ajGQIrQN9y/uizqaJomAvBbBliyi//ZBtBa1YH8MeFbpn51fVR czTkWjZXWGZ/Zwn9lvHmsvb0kI9DZO4iYg+nALDdBN9t7y6kpH+tanzl4ZXZliC5OGNyTd xKvrLzifxvn0sL2jSaNcHGW1j13xedM= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-384-e-TQ8zTVO1GPjKCn5TdD5g-1; Mon, 19 Jun 2023 02:00:01 -0400 X-MC-Unique: e-TQ8zTVO1GPjKCn5TdD5g-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 0B2E3800888; Mon, 19 Jun 2023 06:00:01 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (ovpn-12-194.pek2.redhat.com [10.72.12.194]) by smtp.corp.redhat.com (Postfix) with ESMTP id 20987112132C; Mon, 19 Jun 2023 05:59:54 +0000 (UTC) From: Baoquan He To: linux-kernel@vger.kernel.org Cc: catalin.marinas@arm.com, thunder.leizhen@huawei.com, John.p.donnelly@oracle.com, kexec@lists.infradead.org, linux-arm-kernel@lists.infradead.org, horms@kernel.org, chenjiahao16@huawei.com, linux-riscv@lists.infradead.org, x86@kernel.org, bp@alien8.de, Baoquan He Subject: [RFC PATCH 0/4] kdump: add generic functions to simplify crashkernel crashkernel in architecture Date: Mon, 19 Jun 2023 13:59:47 +0800 Message-Id: <20230619055951.45620-1-bhe@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230618_230009_055573_C037590B X-CRM114-Status: GOOD ( 15.92 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org In the current arm64, crashkernel=,high support has been finished after several rounds of posting and careful reviewing. The code in arm64 which parses crashkernel kernel parameters firstly, then reserve memory can be a good example for other ARCH to refer to. Whereas in x86_64, the code mixing crashkernel parameter parsing and memory reserving is twisted, and looks messy. Refactoring the code to make it more readable maintainable is necessary. Here, try to abstract the crashkernel parameter parsing code into a generic function parse_crashkernel_generic(), and the crashkernel memory reserving code into a generic function reserve_crashkernel_generic(). Then, in ARCH which crashkernel=,high support is needed, a simple arch_reserve_crashkernel() can be added to call above two generic functions. This can remove the duplicated implmentation code in each ARCH, like arm64, x86_64. I only change the arm64 and x86_64 implementation to make use of the generic functions to simplify code. Risc-v can be done very easily refer to the steps in arm64 and x86_64. I leave this to Jiahao or other risc-v developer since Jiahao have posted a patchset to add crashkernel=,high support to risc-v. This patchset is based on the latest linus's tree, and on top of below patch: arm64: kdump: simplify the reservation behaviour of crashkernel=,high https://git.kernel.org/arm64/c/6c4dcaddbd36 Baoquan He (4): kdump: rename parse_crashkernel() to parse_crashkernel_common() kdump: add generic functions to parse crashkernel and do reservation arm64: kdump: use generic interfaces to simplify crashkernel reservation code x86: kdump: use generic interfaces to simplify crashkernel reservation code arch/arm/kernel/setup.c | 4 +- arch/arm64/Kconfig | 3 + arch/arm64/include/asm/kexec.h | 8 ++ arch/arm64/mm/init.c | 141 ++---------------------- arch/ia64/kernel/setup.c | 4 +- arch/loongarch/kernel/setup.c | 3 +- arch/mips/cavium-octeon/setup.c | 2 +- arch/mips/kernel/setup.c | 4 +- arch/powerpc/kernel/fadump.c | 5 +- arch/powerpc/kexec/core.c | 4 +- arch/powerpc/mm/nohash/kaslr_booke.c | 4 +- arch/riscv/mm/init.c | 5 +- arch/s390/kernel/setup.c | 4 +- arch/sh/kernel/machine_kexec.c | 5 +- arch/x86/Kconfig | 3 + arch/x86/include/asm/kexec.h | 32 ++++++ arch/x86/kernel/setup.c | 141 +++--------------------- include/linux/crash_core.h | 33 +++++- kernel/crash_core.c | 158 +++++++++++++++++++++++++-- 19 files changed, 274 insertions(+), 289 deletions(-)