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 901E76070B24 for ; Tue, 10 Nov 2026 09:24:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=nsuaEVW8; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=ESB/PjWK 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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=anLdELyja2Hy69l1U4K5GC3KSWyOsZhor6+5I7MJPrQ=; b=nsuaEVW8mXdOi+30gmt6wSGqFK A8n/icxFkJc3C6Tv1J/enX+gSuUs8a4/gthTulJ2eRHwr898dBMLgUSrtzTrR/PqekCOQBezqAwg+ PbRn8th7Ebqbx40ZVz3u6FBzC8WeP4XHA3cUJzgryXHFdrhWd2cS3KU7cdyzGMCsrzB9QiSuedtPN p0Xy5XToEcisKr9g1zCyPPE43bpdyZ87wlb22w5XmUNFMaaAcaYwColETuxx1QB/QBmRWSuby+IoH dtcxQ7GmS+XAC+pxYSf/78ytoEGOZm9JI/6ZTWTHvgu9Hk0mAKJ3woJjgTdf8ARZ3X/bd4Xzi9hWz XjKCjWCw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xQi5t-00000003Fvr-0A41; Tue, 10 Nov 2026 09:24:45 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xQi5r-00000003Fum-2xWo; Tue, 10 Nov 2026 09:24:43 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id DF896637F8; Tue, 10 Nov 2026 09:24:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D5C931F008BC; Tue, 10 Nov 2026 09:24:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794302682; bh=anLdELyja2Hy69l1U4K5GC3KSWyOsZhor6+5I7MJPrQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=ESB/PjWK+7S4hjQjB/73o85ozUTxNGJcqR0TnfzJKkNnd6UYrv4E7xJSc1bKO//Hn rkf4+WQvzyZf42O1qbYbMhUlmgr1W5deOzJJmZ5KUMYJKnnpWtoXVYXj+dtdZtyPoS xxrS1xZ9mP2EWgJcmiidxffyNNuo5GynD31uah5rmQUQHROrdjeqVIc3FwWbOt/y4s iE2aCm5GxutXvK/N4gExiTkv5wRs7xrv9DSKusBdgzQawHVWyUg7snClrfR+QAU+ip DJKYBZLvhsxN84M2YjXVI0YTj3dOCOF3l3zhtRrYrZmu6uDkut5NaVFPbagJucH2mt RrlQ9HWeLrLTw== Date: Tue, 10 Nov 2026 11:24:35 +0200 From: Mike Rapoport To: Pasha Tatashin Cc: Chen Pei , pjw@kernel.org, palmer@dabbelt.com, alex@ghiti.fr, pratyush@kernel.org, graf@amazon.com, shuah@kernel.org, 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: Re: [PATCH v3 2/4] riscv: Add support for kexec handover (KHO) Message-ID: References: <20261106071459.2003-1-cp0613@linux.alibaba.com> <20261106071459.2003-3-cp0613@linux.alibaba.com> <179415145358.358073.165272378597657083.b4-review@b4> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <179415145358.358073.165272378597657083.b4-review@b4> X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" X-Spam-Status: No, score=-15.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 On Sun, Nov 08, 2026 at 10:24:13AM -0500, Pasha Tatashin wrote: > > The generic handover paths are already in place on RISC-V: the outgoing > > kernel publishes the handover FDT and the bootmem list in /chosen of the > > DTB built by of_kexec_alloc_and_setup_fdt(), and the incoming kernel > > picks both up while scanning that node. Only the architecture symbol is > > missing. > > > > Set it to 64BIT && MMU: ARCH_SUPPORTS_KEXEC_FILE is already 64BIT only, > > and KEXEC_HANDOVER selects CMA, which depends on MMU. > > > > Signed-off-by: Chen Pei > > > > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig > > index e7891a2a89da..a5c56252ff44 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 > > Reviewed-by: Pasha Tatashin > > But pre-reqs. should be applied prior taking this series: > > 1. https://lore.kernel.org/all/20261023054518.3258350-1-gthelen@google.com I'm planning to send it to Linus this week. > 2. https://lore.kernel.org/all/20261104-kho-bootmem-sizing-v2-0-b0d1a834780f@kernel.org This is easy if we take it via liveupdate tree :) @ricsv folks, how do you prefer to play it? > -- > Pasha > -- Sincerely yours, Mike.