From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794483279; b=YLe4LTPTxig1doA16603OJx54MFb2psjT/bCrRknmqhn0xgIN67AkPZFPn9ebXzUMPnn Jt5ZhCxfx+0Q+OR17J6cLOWpY583c69tcYV69X+xMgZgcH/BhaUQQ2BPGxTJD2W2x3Fan K5hcvdi2J2K2xTttGd/61YK/UcVkVNq4ROsmEC8b/fqEW5m7SfIRzZT9t1XzhPB335MiY n0T9y/U42ZEd77dUiCRURc0ppLD4PMl/zW3KQgxlyOA0jNz5qB/MpBeBWjszzX3OEu36g QIu3z8PhEnRRvpv40SWPnBR/jjCsRKaVnwiVaRuY33kz49nlzH61YJhxfC2VkTY+Qgw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794483279; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=zLsrZztbD+ZscRIw64dNIPk38Ao6S3WgpMxepM0KndU=; b=yk7DFjRFw6AVzHhmAO18SUg674b7W76MI8NDhFO6PHM2lGUc/k2Rl18pvFkcd8bdNAwD inZvEHauqKKvMaR1ET+G3P5tKnM+2/Lyhr1wCjyDdXTi3/RLphjzITe74EBAUaTmKJP+0 aquAcyGdw+7nH9/0/uE8sJdB+Jg/asWFgUxjI3/+fE5Xhk8mdSfmEzqH43DkQuhOenTU0 biXGzob2oa1efNnEvLEpTUb60OL3mFXs7LF93O+t96Em0bkDpD0RYu67VJ6gFr0i3thxj Pw3imc3n8wrCiLp2NJung3nPN3Nshp7G2QayKdwzD+c7iTWtBbwhoz3BONQqSMD4cYQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=XKM1hCEB; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 608BE606A31C for ; Thu, 12 Nov 2026 11:34:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=XKM1hCEB 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 Reply-To: sashiko-reviews@lists.linux.dev 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-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > 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