Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932519AbbG1O7j (ORCPT ); Tue, 28 Jul 2015 10:59:39 -0400 Received: from foss.arm.com ([217.140.101.70]:59818 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932189AbbG1O7f (ORCPT ); Tue, 28 Jul 2015 10:59:35 -0400 Date: Tue, 28 Jul 2015 15:59:06 +0100 From: Mark Rutland To: Mark Salter Cc: Catalin Marinas , Will Deacon , Arnd Bergmann , Ard Biesheuvel , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-mm@kvack.org" , "linux-arch@vger.kernel.org" Subject: Re: [PATCH 0/2] arm64: support initrd outside of mapped RAM Message-ID: <20150728145906.GE15213@leverpostej> References: <1438093961-15536-1-git-send-email-msalter@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1438093961-15536-1-git-send-email-msalter@redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1549 Lines: 39 Hi Mark, As a heads-up, it looks like you missed a space when sending this; Arnd and Ard got merged into: "Arnd Bergmann --cc=Ard Biesheuvel" I've corrected that for this reply. On Tue, Jul 28, 2015 at 03:32:39PM +0100, Mark Salter wrote: > When booting an arm64 kernel w/initrd using UEFI/grub, use of mem= will likely > cut off part or all of the initrd. This leaves it outside the kernel linear > map which leads to failure when unpacking. The x86 code has a similar need to > relocate an initrd outside of mapped memory in some cases. > > The current x86 code uses early_memremap() to copy the original initrd from > unmapped to mapped RAM. This patchset creates a generic copy_from_early_mem() > utility based on that x86 code and has arm64 use it to relocate the initrd > if necessary. This sounds like a sane idea to me. > Mark Salter (2): > mm: add utility for early copy from unmapped ram > arm64: support initrd outside kernel linear map > > arch/arm64/kernel/setup.c | 55 +++++++++++++++++++++++++++++++++++++ > include/asm-generic/early_ioremap.h | 6 ++++ > mm/early_ioremap.c | 22 +++++++++++++++ > 3 files changed, 83 insertions(+) Any reason for not moving x86 over to the new generic version? Mark. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/