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 0E6BD606A31C for ; Thu, 12 Nov 2026 11:34:42 +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=hRoSbpKv; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=XKM1hCEB 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=zLsrZztbD+ZscRIw64dNIPk38Ao6S3WgpMxepM0KndU=; b=hRoSbpKv8XtdZl4FRJu/MEI5Y5 y2bNkPvpidK+WWd6DVLgiDkfop0umfHQcuvQWDgGKnzIunsi7hhY3iHGuMZyoNJsEyrQ8c3Xl2Qou wLAidMobcEhsPbsMSKgO2z4PVm+iPpNt9gmbSptA9fN78eO2aLUUK5QByUTcEsJBf2b2VBwnf2IiQ wLVhanvnPeeVH3Q2gzZaQs4KYxxmlyPU97BfSiQ4LsQYgRSukQTwuft8cEUzSrzp46RA2Z8nK4jbT QmhG/uOaVkeOF47W8jH+OUw1zFUl/fsAEQgP38yKoYPRuoPacOFGeepHTVB6lB1vJPQ5USQBV1lbu I+Own95g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xRT4i-00000009kAi-3Whd; Thu, 12 Nov 2026 11:34:40 +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 1xRT4i-00000009kAc-0h9t for kexec@lists.infradead.org; Thu, 12 Nov 2026 11:34:40 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 85FC861918; Thu, 12 Nov 2026 11:34:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6E9631F00A05; Thu, 12 Nov 2026 11:34:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794483279; bh=zLsrZztbD+ZscRIw64dNIPk38Ao6S3WgpMxepM0KndU=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=XKM1hCEB+Y0qpmen5FQZg5n+F3aAUCUNDd6q9uuqcfGcBe902Ijw7gtJ1ZIy1uYTl KZaKYYaeDF2VJIsTDF+GSUgdmAxZGQRS8yS6uC7/WSyyRRAeCl4f5dHn5mHSo+rvMt 9ODr2GELrlcmDsHkq/nCCjMDlTtuWnbTXNctPd0S0YcQREerk32CoBQyIXTH9HGX74 QoKdUOgw2KOgojaHRhZU+ruAckryVumTQVIT8TsOTDGTnOY6NKQnVr1oUrkRbjONuH bBGohSC2PWKBpMvNjAsubzMEX9ugKTYhjj8teu+WK9sHI7jKeCt8PYs8tSBOPPixTa oyYQXMJfix3Jg== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v1 3/8] s390/kexec: Pass crashkernel CMA ranges to the kdump kernel To: "Mikhail Zaslonko" , "Heiko Carstens" , "Vasily Gorbik" , "Alexander Gordeev" Cc: "Ilya Leoshkevich" , "Andrew Morton" , "Baoquan He" , "Mike Rapoport" , "Pasha Tatashin" , "Pratyush Yadav" , "Dave Young" , "Jiri Bohac" , "Jonathan Corbet" , "Usama Arif" , linux-s390@vger.kernel.org, kexec@lists.infradead.org, "Christian Borntraeger" In-Reply-To: <20261112112105.1169118-4-zaslonko@linux.ibm.com> References: <20261112112105.1169118-1-zaslonko@linux.ibm.com> <20261112112105.1169118-4-zaslonko@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Thu, 12 Nov 2026 11:34:38 +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=-10.9 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,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: > Store the crashkernel CMA ranges in the parmarea of the kdump kernel, > next to oldmem_base and oldmem_size, when it is loaded with > kexec_file_load(). >=20 > The ranges use 64 of the 72 bytes of pad1, which is enough for the four > ranges the generic code reserves at most. They are sorted by address > and unused entries are zero. Older kernels ignore pad1 and kernel images > have it zeroed, so old and new kernels still work together. >=20 > For kexec_load(), kexec-tools would have to fill in the ranges. It can > read them from /sys/kernel/kexec_crash_cma_ranges. >=20 > Co-developed-by: Vasily Gorbik > Signed-off-by: Vasily Gorbik > Signed-off-by: Mikhail Zaslonko Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261112112105.1169= 118-1-zaslonko@linux.ibm.com?part=3D3