From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EA801606D80D for ; Tue, 3 Nov 2026 08:09:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=MDBYkElq; dkim=fail reason="signature verification failed" (1024-bit key, unprotected) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.a=rsa-sha256 header.s=default header.b=BxTAX8VR 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:References:In-Reply-To: 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: List-Unsubscribe-Post:List-Owner; bh=CpIX/bHRqdG7STm6FAEQM3IO4AyxsNTMOR/vzlzOpnU=; b=MDBYkElqgeiEweMBiDwTrKUGT0 ZZYI3EG98pZD5bDgrc+5w6mGwctVWSB2vHT9N58I+UPgRZ5gagS1dd+ENMmnmnFWd0mgd0eUamGwe 817qSTefLuKXe/q4st+/B/2P1ZvgKCn0O8t3fTtp+B6e3UrtknAy/dzU6lVnppDQsJ//AeXcrSxUR ce3fkYu0sVo2fPIZn2/trm1WAGO+YHzSm4x+Awx6t6pzDGUDnFjvKK+/hEAHwneAG4G72/s5ikrdN zNWJ+DzafM1kuo3blFevfH+7fYeKBpBuv9OCO2lh/9hvF78QmYzofs1/O4rfZk8tQqk/jc3tVqpW/ 8e8zj0ag==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xO9aZ-00000001UI2-0fXu; Tue, 03 Nov 2026 08:09:51 +0000 Received: from out30-132.freemail.mail.aliyun.com ([115.124.30.132]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xO9aV-00000001UFf-04lt; Tue, 03 Nov 2026 08:09:48 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1793693383; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=zf6qC7Z68PAfi/g1Lq1I7GPVQN/ADTRNm3/p9ryG3Ic=; b=BxTAX8VRtOhWPBzgGjv2raOsIG1CdVFV/Wn+gpsAafgN4CaNxyvOygIqCVReS/hByyiLC5wojvtdu8mdCy4ogC/UGBWUTPmcLtAT8VvDT9LzY1we8ZgAOwOTlxenMPFkvdk9h5y2Z6XJ+MHGD+X5KRGeqh12RqAALHVEl+oitSE= X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R251e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033037026112;MF=cp0613@linux.alibaba.com;NM=1;PH=DS;RN=14;SR=0;TI=SMTPD_---0XE27L0Y_1793693381; Received: from DESKTOP-S9E58SO.localdomain(mailfrom:cp0613@linux.alibaba.com fp:SMTPD_---0XE27L0Y_1793693381 cluster:ay36) by smtp.aliyun-inc.com; Tue, 03 Nov 2026 16:09:42 +0800 From: Chen Pei To: pjw@kernel.org, palmer@dabbelt.com, alex@ghiti.fr, rppt@kernel.org, pasha.tatashin@soleen.com, pratyush@kernel.org, graf@amazon.com, shuah@kernel.org Cc: guoren@kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, kexec@lists.infradead.org Subject: [PATCH v2 3/5] riscv: Add support for kexec handover (KHO) Date: Tue, 3 Nov 2026 16:09:24 +0800 Message-ID: <20261103080926.2079-4-cp0613@linux.alibaba.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261103080926.2079-1-cp0613@linux.alibaba.com> References: <20261103080926.2079-1-cp0613@linux.alibaba.com> X-Archived-By: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261103_000947_380780_FC1E6A5A X-CRM114-Status: UNSURE ( 7.23 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -17.6 (-----------------) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" X-Spam-Status: No, score=-16.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 KHO is architecture independent: the outgoing kernel publishes the handover FDT and the scratch descriptor array in the /chosen node of the DTB it builds for the incoming kernel (kho_add_chosen(), reached from of_kexec_alloc_and_setup_fdt()), and the incoming kernel picks both up while scanning that node (early_init_dt_check_kho() -> kho_populate()). RISC-V already builds that DTB in load_extra_segments() and passes it to the incoming kernel in a1, so only the architecture symbol is missing. Depend on 64BIT to match ARCH_SUPPORTS_KEXEC_FILE, and on MMU because KEXEC_HANDOVER selects CMA, which depends on MMU. Signed-off-by: Chen Pei --- arch/riscv/Kconfig | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 435da0713243..e11463a923a3 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -1125,6 +1125,9 @@ config ARCH_SELECTS_KEXEC_FILE config ARCH_SUPPORTS_KEXEC_PURGATORY def_bool ARCH_SUPPORTS_KEXEC_FILE +config ARCH_SUPPORTS_KEXEC_HANDOVER + def_bool 64BIT && MMU + config ARCH_SUPPORTS_CRASH_DUMP def_bool y -- 2.50.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv