From patchwork Wed Dec 4 10:28:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 13893505 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 A3322E7716D for ; Wed, 4 Dec 2024 10:32:50 +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: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=mr1VNyO3Lr951QHJDr56v4a9+KnhMSyBPcNhs61GT/I=; b=EEbpf7e7E2+NMMC+qTij6pd+TT BLoKMmkl8zs5ZLyTx2MyfL90VUpKaKZDIFrSVtPynGhLWtDTcaL+86clLs2d3Bc0HfDsBK7L/fJyM 092pYnw1laylqOG+rPaPOtEfm0eyKD4XdUVKUIkHjOlGumYeT7MJZnPA0JnEfdiET9a+WHLELmnXa JVJ3yfK7RSNzIQP+N/N8vJ4fvM+w2ir8/rzaLbqsPTXJ2V6nhkLs4QKl3yGgYuwaQgOzRKz3KSv+F zEKuIy/3pvmjLz4pIZz6jv9Fj4HqqJZIdxvCY0wgwKEoOd301kCeux/DNzmiyVWG3MDZd8lVpH642 auLv3I5A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tImgQ-0000000CDGw-0VqK; Wed, 04 Dec 2024 10:32:38 +0000 Received: from nyc.source.kernel.org ([147.75.193.91]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tImdY-0000000CCXT-49Bb for linux-arm-kernel@lists.infradead.org; Wed, 04 Dec 2024 10:29:42 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 1B75FA40F17; Wed, 4 Dec 2024 10:27:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0537BC4CEDD; Wed, 4 Dec 2024 10:29:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733308179; bh=0r10L0YCyc4mHIa4LmRwV2eFEw40ha9ErMc2w48Ije4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kWS6xxv/D0II+x/uHDJV7zBfhSB+xp/+0+xQ/BEmIWa9fFF62990uvJMieEDHJXcs Nyeolhp8EOa45Xdacjp83BWNh+O1yzDhIAbTFx+39LAEUl7o5tTUjdThuHEgNy2lPK a943Iw2EhFDWSdu+hvpEUF/FiZF+3gS13QZf6SEzE61K40gQxHsd6R3J89512Hghoz e4+PHpEJtpmIr6L1htv/GLv0ZRqajbPALtMlf+O9ZTA5ilOMv76imf/kj66AOfIjj1 uqd1/gy5GnP2MuUG6Dx1wWBbGlcSCbVNy17WsprzBzXHYoWYVkRgPbNApr5giK6qHU EFAIH4Di5Hutw== From: Arnd Bergmann To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Arnd Bergmann , Aaro Koskinen , Andrew Lunn , Ard Biesheuvel , Daniel Mack , Gregory Clement , Haojian Zhuang , "Jeremy J. Peper" , Kristoffer Ericson , Krzysztof Kozlowski , Linus Walleij , Mark Brown , Ralph Siemsen , Robert Jarzmik , Russell King , Sebastian Hesselbarth , Tony Lindgren Subject: [PATCH 02/15] ARM: limit OABI support to StrongARM CPUs Date: Wed, 4 Dec 2024 11:28:51 +0100 Message-Id: <20241204102904.1863796-3-arnd@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20241204102904.1863796-1-arnd@kernel.org> References: <20241204102904.1863796-1-arnd@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241204_022941_172769_D6480321 X-CRM114-Status: GOOD ( 23.65 ) 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 From: Arnd Bergmann As discussed on the mailing lists, there is no way to build OABI userspace binaries any more since gcc-4.8, and now support is also getting dropped in binutils, which will make it impossible to build pure OABI kernels at some point in the future. I found no evidence of anyone still sing OABI userspace on embedded systems that keep getting kernel updates, but there are a few desktop-class machines that date back to the 1990s using Intel StrongARM processors that were supported by old versions of Debian, Red Hat or the official Corel Netwinder distribution. Add a much stricter Kconfig dependency for both native OABI and OABI_COMPAT enabled kernels, only allowing either of them to be selected when building a kernel that targets a StrongARM based machine. Link: https://lore.kernel.org/lkml/2831c5a6-cfbf-4fe0-b51c-0396e5b0aeb7@app.fastmail.com/ Signed-off-by: Arnd Bergmann Acked-by: Linus Walleij --- arch/arm/Kconfig | 14 +++++++------- arch/arm/configs/am200epdkit_defconfig | 1 - arch/arm/configs/axm55xx_defconfig | 1 - arch/arm/configs/footbridge_defconfig | 2 +- arch/arm/configs/neponset_defconfig | 2 +- arch/arm/configs/versatile_defconfig | 1 - 6 files changed, 9 insertions(+), 12 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index f8f127650ace..54f5cc12dea4 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1161,8 +1161,7 @@ config ARM_PATCH_IDIV code to do integer division. config AEABI - bool "Use the ARM EABI to compile the kernel" if !CPU_V7 && \ - !CPU_V7M && !CPU_V6 && !CPU_V6K && !CC_IS_CLANG + bool "Use the ARM EABI to compile the kernel" if CPU_SA110 || CPU_SA1100 default y help The Arm EABI is the default ABI on all modern Linux @@ -1172,9 +1171,13 @@ config AEABI Everyone should enable this, as support for OABI user space was dropped in gcc-4.8 and most distributions after ca. 2013. + Support for OABI mode will be removed from the kernel + once Intel StrongARM CPUs are phased out. + config OABI_COMPAT bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" depends on AEABI && !THUMB2_KERNEL + depends on CPU_SA110 || CPU_SA1100 help This option preserves the old syscall interface along with the new (ARM EABI) one. It also provides a compatibility layer to @@ -1187,11 +1190,8 @@ config OABI_COMPAT selected, since there is no way yet to sensibly distinguish between calling conventions during filtering. - If you know you'll be using only pure EABI user space then you - can say N here. If this option is not selected and you attempt - to execute a legacy ABI binary then the result will be - UNPREDICTABLE (in fact it can be predicted that it won't work - at all). If in doubt say N. + Support for OABI_COMPAT will be removed from the kernel + once Intel StrongARM CPUs are phased out. config ARCH_SELECT_MEMORY_MODEL def_bool y diff --git a/arch/arm/configs/am200epdkit_defconfig b/arch/arm/configs/am200epdkit_defconfig index 22397d45f4a0..55c5c08a5f96 100644 --- a/arch/arm/configs/am200epdkit_defconfig +++ b/arch/arm/configs/am200epdkit_defconfig @@ -7,7 +7,6 @@ CONFIG_EXPERT=y # CONFIG_ARCH_MULTI_V7 is not set CONFIG_ARCH_PXA=y CONFIG_ARCH_GUMSTIX=y -# CONFIG_OABI_COMPAT is not set CONFIG_CMDLINE="console=ttyS0,115200n8 root=1f01 rootfstype=jffs2" CONFIG_MODULES=y CONFIG_MODULE_UNLOAD=y diff --git a/arch/arm/configs/axm55xx_defconfig b/arch/arm/configs/axm55xx_defconfig index 39b06d59d87a..9d14b987ee94 100644 --- a/arch/arm/configs/axm55xx_defconfig +++ b/arch/arm/configs/axm55xx_defconfig @@ -38,7 +38,6 @@ CONFIG_PCIE_AXXIA=y CONFIG_SMP=y CONFIG_NR_CPUS=16 CONFIG_HOTPLUG_CPU=y -CONFIG_OABI_COMPAT=y CONFIG_HIGHMEM=y CONFIG_ARM_APPENDED_DTB=y CONFIG_ARM_ATAG_DTB_COMPAT=y diff --git a/arch/arm/configs/footbridge_defconfig b/arch/arm/configs/footbridge_defconfig index 589b7b1df8c6..e8bf9847d35d 100644 --- a/arch/arm/configs/footbridge_defconfig +++ b/arch/arm/configs/footbridge_defconfig @@ -9,9 +9,9 @@ CONFIG_ARCH_MULTI_V4=y CONFIG_ARCH_FOOTBRIDGE=y CONFIG_ARCH_EBSA285_HOST=y CONFIG_ARCH_NETWINDER=y +# CONFIG_AEABI is not set CONFIG_FPE_NWFPE=y CONFIG_FPE_NWFPE_XP=y -# CONFIG_AEABI is not set CONFIG_MODULES=y CONFIG_PARTITION_ADVANCED=y CONFIG_ACORN_PARTITION=y diff --git a/arch/arm/configs/neponset_defconfig b/arch/arm/configs/neponset_defconfig index a8833b2ce335..7a7b6a896f85 100644 --- a/arch/arm/configs/neponset_defconfig +++ b/arch/arm/configs/neponset_defconfig @@ -6,12 +6,12 @@ CONFIG_ARCH_MULTI_V4=y CONFIG_ARCH_SA1100=y CONFIG_SA1100_ASSABET=y CONFIG_ASSABET_NEPONSET=y +# CONFIG_AEABI is not set CONFIG_ZBOOT_ROM_TEXT=0x80000 CONFIG_ZBOOT_ROM_BSS=0xc1000000 CONFIG_ZBOOT_ROM=y CONFIG_CMDLINE="console=ttySA0,38400n8 cpufreq=221200 rw root=/dev/mtdblock2 mtdparts=sa1100:512K(boot),1M(kernel),2560K(initrd),4M(root) load_ramdisk=1 prompt_ramdisk=0 mem=32M noinitrd initrd=0xc0800000,3M" CONFIG_FPE_NWFPE=y -# CONFIG_AEABI is not set CONFIG_PM=y CONFIG_MODULES=y CONFIG_MODULE_UNLOAD=y diff --git a/arch/arm/configs/versatile_defconfig b/arch/arm/configs/versatile_defconfig index 8e89debb5a5b..bb9eb9ccbbde 100644 --- a/arch/arm/configs/versatile_defconfig +++ b/arch/arm/configs/versatile_defconfig @@ -6,7 +6,6 @@ CONFIG_LOG_BUF_SHIFT=14 CONFIG_BLK_DEV_INITRD=y # CONFIG_ARCH_MULTI_V7 is not set CONFIG_ARCH_VERSATILE=y -CONFIG_OABI_COMPAT=y CONFIG_CMDLINE="root=1f03 mem=32M" CONFIG_FPE_NWFPE=y CONFIG_VFP=y