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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC6EEC02199 for ; Thu, 6 Feb 2025 13:29:46 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 7419E280008; Thu, 6 Feb 2025 08:29:46 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 6F1F3280005; Thu, 6 Feb 2025 08:29:46 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 56988280008; Thu, 6 Feb 2025 08:29:46 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id 37C6A280005 for ; Thu, 6 Feb 2025 08:29:46 -0500 (EST) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id C67EF1A116C for ; Thu, 6 Feb 2025 13:29:26 +0000 (UTC) X-FDA: 83089601532.08.6195964 Received: from nyc.source.kernel.org (nyc.source.kernel.org [147.75.193.91]) by imf28.hostedemail.com (Postfix) with ESMTP id 201D1C0032 for ; Thu, 6 Feb 2025 13:29:25 +0000 (UTC) Authentication-Results: imf28.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=Q3ZxlqkB; spf=pass (imf28.hostedemail.com: domain of rppt@kernel.org designates 147.75.193.91 as permitted sender) smtp.mailfrom=rppt@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1738848565; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=/1KShM+jWPTp6waZdwCyqTCBrvrO5AnhykYtsX6/Ihw=; b=Co/bHU0RbvMn+fBXWlbSOXp1ORycU2k0n6y1keEZGeZKchFxwCdjrHWapKOElHouQUGb16 iPhS6W+3N8feflWXXdi8yfMR/xjnJLnYa0g0xD1KdUQa3YJBdEaC+PeO47P71MnNFC+2TL cNOyowziD+D6nsbk/pRxy7F3giepzBk= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1738848565; a=rsa-sha256; cv=none; b=EVs585s2577qW4xo0NaLObKQohNEwil4u5oaWss9Gd+rtSfqvN5lIEoVJVSABY5GT3gPWK CdeMpTIJWY07SKTYYxSDz2UkFmbbTGnBX2bb36rppLswO1IhFSG4vo06OXvsupF7iGZVrQ 3Mb/Dxr79LoL3sTJatT2oPAvcNRd5Fc= ARC-Authentication-Results: i=1; imf28.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=Q3ZxlqkB; spf=pass (imf28.hostedemail.com: domain of rppt@kernel.org designates 147.75.193.91 as permitted sender) smtp.mailfrom=rppt@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 8C710A44279; Thu, 6 Feb 2025 13:27:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BBE40C4CEDF; Thu, 6 Feb 2025 13:29:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1738848564; bh=X7mR6kiT/fP3C44/I2+NRTu7ef7doFLaO1U8zS8Qi9w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q3ZxlqkBYYhEdIJRnvdvLTErR+PthzQXy3Zxyfp34sfONUHY6JyXio3UB3ihtRZFZ AChoLyh1lqS5kBY9KDoO6gA/r9YCgzeUntG4/FQPSXZ5REwjRRZBCqGjd2JQE6Dy8c 08oliT0qZRQXtfz2TC4v8BwURGflWE5xZiglbUtMfzUXLRpkJom5sZ3LGYNcST1YG0 z9vu406bHiv1idZHn4xmBg7I12AnuMDbziGboj7zAZ+95NCWR5WWrkQ7r/Kzose6yg JpGvRZheiC/kEfCgfagYXGWCHTR4v8zMhdTmJYQClKFYkCK5g3n4ZZLyDTx1Zngce9 Arf1qcyN4wlPw== From: Mike Rapoport To: linux-kernel@vger.kernel.org Cc: Alexander Graf , Andrew Morton , Andy Lutomirski , Anthony Yznaga , Arnd Bergmann , Ashish Kalra , Benjamin Herrenschmidt , Borislav Petkov , Catalin Marinas , Dave Hansen , David Woodhouse , Eric Biederman , Ingo Molnar , James Gowans , Jonathan Corbet , Krzysztof Kozlowski , Mark Rutland , Mike Rapoport , Paolo Bonzini , Pasha Tatashin , "H. Peter Anvin" , Peter Zijlstra , Pratyush Yadav , Rob Herring , Rob Herring , Saravana Kannan , Stanislav Kinsburskii , Steven Rostedt , Thomas Gleixner , Tom Lendacky , Usama Arif , Will Deacon , devicetree@vger.kernel.org, kexec@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org Subject: [PATCH v4 08/14] kexec: Add config option for KHO Date: Thu, 6 Feb 2025 15:27:48 +0200 Message-ID: <20250206132754.2596694-9-rppt@kernel.org> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20250206132754.2596694-1-rppt@kernel.org> References: <20250206132754.2596694-1-rppt@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: cjkkt7e73wmyegrit58cqkz3amn7xqqa X-Rspam-User: X-Rspamd-Queue-Id: 201D1C0032 X-Rspamd-Server: rspam03 X-HE-Tag: 1738848564-110920 X-HE-Meta: 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 AffZgRYJ ipQee17Bj+VB190k1gl+twJiEmraYUmIrWohH3GhHHusg+1nvE1pIOxG3dM4jh7aibNyV5jZP75HqNRZrCB2VKu04RBZLzrVkeYEofv0AhLF2z/fk1eUJvmqFDl39CU8HmbQ+KYyUXBJ5TR0zTsMsrSBwYhAXqwaP8Jd5Y+X7Hic8Bu1gs1jg2eT+RGwXy8FH6C0GLv7jImgXahr+v///bxM3ywXCI8IDFm/3Kr7fwvAM44Q+a9/onLkxyi7gPJ6ThkDFREgFGg044Z89Usr+mqzgmI5lYUtl03dIdo5VtOLB/c+6rRVYvd0bjylF8/mq2wJE0J+Ty1TP95w= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Alexander Graf We have all generic code in place now to support Kexec with KHO. This patch adds a config option that depends on architecture support to enable KHO support. Signed-off-by: Alexander Graf Co-developed-by: Mike Rapoport (Microsoft) Signed-off-by: Mike Rapoport (Microsoft) --- kernel/Kconfig.kexec | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/kernel/Kconfig.kexec b/kernel/Kconfig.kexec index 4d111f871951..332824d8d6dc 100644 --- a/kernel/Kconfig.kexec +++ b/kernel/Kconfig.kexec @@ -95,6 +95,19 @@ config KEXEC_JUMP Jump between original kernel and kexeced kernel and invoke code in physical address mode via KEXEC +config KEXEC_HANDOVER + bool "kexec handover" + depends on ARCH_SUPPORTS_KEXEC_HANDOVER && ARCH_SUPPORTS_KEXEC_FILE + select MEMBLOCK_KHO_SCRATCH + select KEXEC_FILE + select LIBFDT + select CMA + help + Allow kexec to hand over state across kernels by generating and + passing additional metadata to the target kernel. This is useful + to keep data or state alive across the kexec. For this to work, + both source and target kernels need to have this option enabled. + config CRASH_DUMP bool "kernel crash dumps" default ARCH_DEFAULT_CRASH_DUMP -- 2.47.2