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 BD3EA606A32F for ; Fri, 23 Oct 2026 08:07:08 +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=cA5CGUdg; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=JPKIoING DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Reply-To:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Date: Content-Transfer-Encoding:Content-Type:References:In-Reply-To:Cc:To:Subject: From:Message-ID:MIME-Version:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=kTT7Dsx9X9PpjaeyEGwz9MttR0qrfvG6TEXWwsL/a4I=; b=cA5CGUdgKqQi7XAdn11V0O5yaM rL0i68/+/+mSIKizdMuvyfYmhKuiVas6GT2ktid4J28LDGLzzXJ8z6ufbnErvTDWYtpzUoczJEZad Io6KVndtnGrMPf5OuGO0Au51aLj57xslcWA9hTM1RVFGYJbfyluDXdqdTN9FaFR0Vu2UE6yW/FHmu Ff3P1awNU+NeIgPI02XjhPSTOhoP2SHV54eyZwBbI0pejxyt1H6tSD7j4VJYyyOD+kV71IZXsvney jnp1Frpgf5u2JXJLE8YTkCvaB65oCK8kftQbz0WfPvuH36plvrE4Vzzw09PvvD1KZLybl/lHmUv7Q 0xHhw7Gw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xKAIu-0000000FsPc-1M4U; Fri, 23 Oct 2026 08:07:08 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xKAIm-0000000FsOc-46Al for kexec@lists.infradead.org; Fri, 23 Oct 2026 08:07:01 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id A912441AAA; Fri, 23 Oct 2026 08:07:00 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 80A981F01825; Fri, 23 Oct 2026 08:06:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792742820; bh=kTT7Dsx9X9PpjaeyEGwz9MttR0qrfvG6TEXWwsL/a4I=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=JPKIoING2m+4nufl7BdxRnmhA2J4XdzdQdjbcXUhLLD0XW6JHhtx7+7UxvAdlzmyT eyLVXeJeq+4r4jl9fgWWUvWLQ6rdUl4pm72DFZRBYfIhRijKT9lNZs6sVL+Qj91hzm CBaZXr3578A57adzLa2029AHOHEd1Sb9xNQ9ubPj2C1Rz392NK5YTFC7z9RWdVKChY IqOeZW0hZNBYYc1V0iJ3Ow2uYAhvEhTcJR5iNKM7nF19C5PX3hLrFnpi/Rki1Ud6rw 6jF6KxmF9dmPP0LobypIWL0n4xpO9/ufHB3uxsDltnZLPZxfD7ZU/VZlGqCJ4KWWpD 6PR6BpYa+CooA== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH 5/5] riscv: mm: Reserve the DTB before scanning reserved memory To: "Han Gao" , "Paul Walmsley" , "Palmer Dabbelt" , "Albert Ou" , "Alexandre Ghiti" , "Nathan Chancellor" , "Nick Desaulniers" , "Bill Wendling" , "Justin Stitt" , "Andrew Morton" , "Baoquan He" , "Mike Rapoport" , "Pasha Tatashin" , "Pratyush Yadav" , "Yao Zi" Cc: "Han Gao" , kexec@lists.infradead.org In-Reply-To: <20261023-riscv-kexec-cma-fixes-v1-5-825b90ea23c4@iscas.ac.cn> References: <20261023-riscv-kexec-cma-fixes-v1-0-825b90ea23c4@iscas.ac.cn> <20261023-riscv-kexec-cma-fixes-v1-5-825b90ea23c4@iscas.ac.cn> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 23 Oct 2026 08:06:59 +0000 X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: sashiko-reviews@lists.linux.dev Sender: "kexec" X-Spam-Status: No, score=-11.2 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,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 X-Archived-By: > From: Han Gao >=20 > setup_bootmem() reserves the DTB only after > early_init_fdt_scan_reserved_mem() has allocated the dynamically placed > reserved-memory regions. A CMA pool described with size and alloc-ranges > can therefore be placed over the DTB, which is later handed to the page > allocator and overwritten. >=20 > This happens after kexec_file has put the DTB of the next kernel in CMA: > the next kernel reuses that range for its own pool, and a further > kexec_file_load() fails with -FDT_ERR_BADMAGIC. >=20 > Reserve the DTB first. >=20 > Fixes: ef69d2559fe9 ("riscv: Move early dtb mapping into the fixmap regio= n") > Signed-off-by: Han Gao Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261023-riscv-kexe= c-cma-fixes-v1-0-825b90ea23c4@iscas.ac.cn?part=3D5