Path: csiph.com!goblin1!goblin.stu.neva.ru!news.mixmin.net!aioe.org!bofh.it!news.nic.it!robomod From: Mark Salter Newsgroups: linux.kernel Subject: [PATCH V3 0/3] mm: Add generic copy from early unmapped RAM Date: Sun, 16 Aug 2015 23:00:02 +0200 Message-ID: X-Original-To: Catalin Marinas , Will Deacon , x86@kernel.org X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 Sender: robomod@news.nic.it List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Approved: robomod@news.nic.it Lines: 44 Organization: linux.* mail to news gateway X-Original-Cc: Andrew Morton , Arnd Bergmann , Ard Biesheuvel , Mark Rutland , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, Mark Salter X-Original-Date: Sun, 16 Aug 2015 16:49:25 -0400 X-Original-Message-ID: <1439758168-29427-1-git-send-email-msalter@redhat.com> X-Original-Sender: linux-kernel-owner@vger.kernel.org Xref: csiph.com linux.kernel:1208273 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 and x86 share it in their respective initrd relocation code. Changes from V2: * Fixed sparse warning in copy_from_early_mem() * Removed unneeded MAX_MAP_CHUNK from x86 setup.c * Moved #ifdef outside arm64 relocate_initrd() definition. Changes from V1: * Change cover letter subject to highlight the added generic code * Add patch for x86 to use common copy_from_early_mem() Mark Salter (3): mm: add utility for early copy from unmapped ram arm64: support initrd outside kernel linear map x86: use generic early mem copy arch/arm64/kernel/setup.c | 59 +++++++++++++++++++++++++++++++++++++ arch/x86/kernel/setup.c | 22 +------------- include/asm-generic/early_ioremap.h | 6 ++++ mm/early_ioremap.c | 22 ++++++++++++++ 4 files changed, 88 insertions(+), 21 deletions(-) -- 2.4.3 -- 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/