From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756790AbbCPQc2 (ORCPT ); Mon, 16 Mar 2015 12:32:28 -0400 Received: from cantor2.suse.de ([195.135.220.15]:53607 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752784AbbCPQcZ (ORCPT ); Mon, 16 Mar 2015 12:32:25 -0400 From: Alexander Graf To: linux-arm-kernel@lists.infradead.org Cc: schwab@suse.de, arnd@arndb.de, will.deacon@arm.com, Catalin.Marinas@arm.com, matz@suse.de, linux-kernel@vger.kernel.org, dmueller@suse.com Subject: [PATCH 0/2] arm64: Allow AArch32 on arm64 with 64k PAGE_SIZE Date: Mon, 16 Mar 2015 17:32:21 +0100 Message-Id: <1426523543-4124-1-git-send-email-agraf@suse.de> X-Mailer: git-send-email 1.7.12.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org With binutils 2.25 the default alignment for 32bit arm sections changed to have everything 64k aligned. Armv7 binaries built with this binutils version run successfully on an arm64 system with this patch set applied. This provides the best of both worlds for some users. You get less page faults, but can still run legacy broken code that might not be 64bit safe yet. If you want to give this a try, you obviously need user space that was compiled with 64k constraints fulfilled. For a working rootfs, just grab the latest openSUSE Factory tree: http://download.opensuse.org/ports/armv7hl/factory/images/openSUSE-Factory-ARM-JeOS.armv7-rootfs.armv7l-Current.tbz Alex Alexander Graf (1): arm64: Enable CONFIG_COMPAT also for 64k page size Andreas Schwab (1): arm64: fix implementation of mmap2 compat syscall arch/arm64/Kconfig | 6 +++++- arch/arm64/include/asm/unistd32.h | 2 +- arch/arm64/kernel/entry32.S | 18 ++++++++++++++++++ arch/arm64/kernel/sys32.c | 6 ++++++ 4 files changed, 30 insertions(+), 2 deletions(-) -- 2.1.4