From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 27E12FEA808 for ; Wed, 25 Mar 2026 04:06:52 +0000 (UTC) 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:Content-Transfer-Encoding: Content-Type:Mime-Version:References:In-Reply-To:Message-Id:Subject:Cc:To: From:Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=oikZdq+IKhmOORXBWkEbQjmrrU1iP/ab33eIDNTFj58=; b=dhetbJH0ubRgDZwRWmp0J6C75T I1pRI1vc0K6Yv93vSIDUoU5A0eRxfdr1/JouKaywcmslwjfp1I9QdvAAicpEz72YAaMlqsi6j0+8z 1DkcL+hOz8cTHtMsR6nfUXL7X4FWeVcOlJVtReLPlDL6RNfIIjGRCxLl93IuBzoWGmhdrCR0hjRfO VDiN82KmTyudBGp6kkzsSU5p8p0BmBDzihHaDKK+twqDHvqY8FfaaaQ451hLAmgWuh02puY4rooIm 4PvUxi/U+mThc/YeTddt7Bu6EfbPEi1z+lINOPwOAmiINr1C7VOZY+bgF6AVwvcSz9VHlaraHwooU XzZWuRFA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w5FW4-00000002eVh-11Jz; Wed, 25 Mar 2026 04:06:48 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w5FW1-00000002eV4-3Xjh; Wed, 25 Mar 2026 04:06:46 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id E84BA4443D; Wed, 25 Mar 2026 04:06:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A34CCC2BCB2; Wed, 25 Mar 2026 04:06:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1774411604; bh=WsAQHOogDYWxLt316VoEo1PFk4jzaM4l6YS9sGhWqrs=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=PfDGsqskD39pLcCQXbYS2QFRFghCe4BEZzYtdfA21xdxwIIR4FoeGIkM064eBeWyY D40CifymkJxTpCyEpPpnuoQ9OggtlKZBCPGL6v20TO0xKp5+AhL5+CF3V7RgF7HOF0 NjgD1tu5pmsYOFLipjeAqvBHsr0IFVKdBckI3XFk= Date: Tue, 24 Mar 2026 21:06:44 -0700 From: Andrew Morton To: Coiby Xu Cc: kexec@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org Subject: Re: [PATCH v5 0/3] kdump: Enable LUKS-encrypted dump target support in ARM64 and PowerPC Message-Id: <20260324210644.28f6cf77a26dfadcc4b642e7@linux-foundation.org> In-Reply-To: <20260225060347.718905-1-coxu@redhat.com> References: <20260225060347.718905-1-coxu@redhat.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260324_210645_910355_210A79D5 X-CRM114-Status: GOOD ( 15.61 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, 25 Feb 2026 14:03:43 +0800 Coiby Xu wrote: > CONFIG_CRASH_DM_CRYPT has been introduced to support LUKS-encrypted > device dump target by addressing two challenges [1], > - Kdump kernel may not be able to decrypt the LUKS partition. For some > machines, a system administrator may not have a chance to enter the > password to decrypt the device in kdump initramfs after the 1st kernel > crashes > > - LUKS2 by default use the memory-hard Argon2 key derivation function > which is quite memory-consuming compared to the limited memory reserved > for kdump. > > To also enable this feature for ARM64 and PowerPC, we need to add a > device tree property dmcryptkeys [2] as similar to elfcorehdr to pass > the memory address of the stored info of dm-crypt keys to the kdump > kernel. We don't have any ack/review tags for this series. Could someone please help out?