From patchwork Tue Apr 5 09:17:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 12801381 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B44CFC46467 for ; Tue, 5 Apr 2022 10:04:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350186AbiDEJ4H (ORCPT ); Tue, 5 Apr 2022 05:56:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41250 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236499AbiDEJbX (ORCPT ); Tue, 5 Apr 2022 05:31:23 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 91351BB0; Tue, 5 Apr 2022 02:19:08 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 2745CB81B75; Tue, 5 Apr 2022 09:19:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EB4DCC385AA; Tue, 5 Apr 2022 09:19:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1649150345; bh=LZi7P727AAqyG0pNnIQlVKBnL0VuX4PaSD5yANuxZ+s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ujrpDM4B05bGJDyQnmT9CBUXkpuJk/J7gqvyEvm5CRjqSBoowQyDSHaENyib2r47f 3Krta7/8znFiBKkFREqpzcRqKk/5mBHon+QeGvweYqgN9bDrMJV7EzeqeR54PL1sBa AVOJ3DZACKiQjDqorzUIa03Jn+Z684h1cOmwwRlYhJ+EcV7gU6XL44K5RdqywCsSt7 NCP55TOSN2kxXlzxH/xNxdiT52ZCGhfSdqpbOXK4T3tykQ7D4wwUxQC2GqX7ElQ0Ol Dv5WYgP/Ze7WgTIK+gFy9ZAilDoyXNuO8wQO5gyiKRoWvNPz9joBSpjf2crd8LsKmh m33/c1S7ST2Kg== From: Arnd Bergmann Cc: Arnd Bergmann , Russell King , Hartley Sweeten , Alexander Sverdlin , Hubert Feurstein , Lukasz Majewski , Krzysztof Kozlowski , Alim Akhtar , Linus Walleij , Imre Kaloz , Krzysztof Halasa , Andrew Lunn , Gregory Clement , Sebastian Hesselbarth , Simtec Linux Team , Liviu Dudau , Sudeep Holla , Lorenzo Pieralisi , Ard Biesheuvel , Stephen Boyd , Geert Uytterhoeven , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, patches@opensource.cirrus.com Subject: [PATCH 11/12] ARM: rework endianess selection Date: Tue, 5 Apr 2022 11:17:49 +0200 Message-Id: <20220405091750.3076973-12-arnd@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20220405091750.3076973-1-arnd@kernel.org> References: <20220405091750.3076973-1-arnd@kernel.org> MIME-Version: 1.0 To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org From: Arnd Bergmann Choosing big-endian vs little-endian kernels in Kconfig has not worked correctly since the introduction of CONFIG_ARCH_MULTIPLATFORM a long time ago. The problems is that CONFIG_BIG_ENDIAN depends on ARCH_SUPPORTS_BIG_ENDIAN, which can set by any one platform in the config, but would actually have to be supported by all of them. This was mostly ok for ARMv6/ARMv7 builds, since these are BE8 and tend to just work aside from problems in nonportable device drivers. For ARMv4/v5 machines, CONFIG_BIG_ENDIAN and CONFIG_ARCH_MULTIPLATFORM were never set together, so this was disabled on all those machines except for IXP4xx. As IXP4xx can now become part of ARCH_MULTIPLATFORM, it seems better to formalize this logic: all ARMv4/v5 platforms get an explicit dependency on being either big-endian (ixp4xx) or little-endian (the rest). We may want to fix ixp4xx in the future to support both, but it does not work in LE mode at the moment. For the ARMv6/v7 platforms, there are two ways this could be handled a) allow both modes only for platforms selecting 'ARCH_SUPPORTS_BIG_ENDIAN' today, but only LE mode for the others, given that these were added intentionally at some point. b) allow both modes everwhere, given that it was already possible to build that way by e.g. selecting ARCH_VIRT, and that the list is not an accurate reflection of which platforms may or may not work. Out of these, I picked b) because it seemed slighly more logical to me. Signed-off-by: Arnd Bergmann --- arch/arm/Kconfig | 8 ++++++-- arch/arm/mach-asm9260/Kconfig | 1 + arch/arm/mach-aspeed/Kconfig | 2 +- arch/arm/mach-at91/Kconfig | 3 ++- arch/arm/mach-clps711x/Kconfig | 1 + arch/arm/mach-davinci/Kconfig | 1 + arch/arm/mach-ep93xx/Kconfig | 1 + arch/arm/mach-exynos/Kconfig | 1 - arch/arm/mach-gemini/Kconfig | 1 + arch/arm/mach-highbank/Kconfig | 1 - arch/arm/mach-hisi/Kconfig | 2 +- arch/arm/mach-imx/Kconfig | 4 ++-- arch/arm/mach-iop32x/Kconfig | 1 + arch/arm/mach-keystone/Kconfig | 1 - arch/arm/mach-lpc32xx/Kconfig | 1 + arch/arm/mach-mmp/Kconfig | 2 +- arch/arm/mach-moxart/Kconfig | 1 + arch/arm/mach-mv78xx0/Kconfig | 1 + arch/arm/mach-mvebu/Kconfig | 3 +-- arch/arm/mach-mxs/Kconfig | 1 + arch/arm/mach-nomadik/Kconfig | 1 + arch/arm/mach-npcm/Kconfig | 2 +- arch/arm/mach-nspire/Kconfig | 1 + arch/arm/mach-orion5x/Kconfig | 1 + arch/arm/mach-oxnas/Kconfig | 2 +- arch/arm/mach-qcom/Kconfig | 1 - arch/arm/mach-s3c/Kconfig.s3c24xx | 1 + arch/arm/mach-socfpga/Kconfig | 1 - arch/arm/mach-spear/Kconfig | 2 +- arch/arm/mach-sunxi/Kconfig | 3 +-- arch/arm/mach-versatile/Kconfig | 5 +++-- arch/arm/mach-vt8500/Kconfig | 1 + arch/arm/mach-zynq/Kconfig | 1 - arch/arm/mm/Kconfig | 28 ++++++++++++++++++---------- 34 files changed, 54 insertions(+), 33 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 94909cadb78a..4d98de155e20 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -349,6 +349,7 @@ config ARCH_MULTIPLATFORM config ARCH_FOOTBRIDGE bool "FootBridge" + depends on CPU_LITTLE_ENDIAN select CPU_SA110 select FOOTBRIDGE select NEED_MACH_MEMORY_H @@ -358,7 +359,7 @@ config ARCH_FOOTBRIDGE config ARCH_IXP4XX bool "IXP4xx-based" - select ARCH_SUPPORTS_BIG_ENDIAN + depends on CPU_BIG_ENDIAN select ARM_PATCH_PHYS_VIRT select CPU_XSCALE select GPIO_IXP4XX @@ -374,6 +375,7 @@ config ARCH_IXP4XX config ARCH_PXA bool "PXA2xx/PXA3xx-based" + depends on CPU_LITTLE_ENDIAN select ARCH_MTD_XIP select ARM_CPU_SUSPEND if PM select AUTO_ZRELADDR @@ -393,6 +395,7 @@ config ARCH_PXA config ARCH_RPC bool "RiscPC" depends on !CC_IS_CLANG && GCC_VERSION < 90100 && GCC_VERSION >= 60000 + depends on CPU_LITTLE_ENDIAN select ARCH_ACORN select ARCH_MAY_HAVE_PC_FDC select ARCH_SPARSEMEM_ENABLE @@ -411,6 +414,7 @@ config ARCH_RPC config ARCH_SA1100 bool "SA1100-based" + depends on CPU_LITTLE_ENDIAN select ARCH_MTD_XIP select ARCH_SPARSEMEM_ENABLE select CLKSRC_MMIO @@ -429,6 +433,7 @@ config ARCH_SA1100 config ARCH_OMAP1 bool "TI OMAP1" + depends on CPU_LITTLE_ENDIAN select ARCH_OMAP select CLKSRC_MMIO select GENERIC_IRQ_CHIP @@ -505,7 +510,6 @@ config ARCH_VIRT select ARM_GIC_V3_ITS if PCI select ARM_PSCI select HAVE_ARM_ARCH_TIMER - select ARCH_SUPPORTS_BIG_ENDIAN config ARCH_AIROHA bool "Airoha SoC Support" diff --git a/arch/arm/mach-asm9260/Kconfig b/arch/arm/mach-asm9260/Kconfig index a2e1d0aaf252..74e0f61c74c8 100644 --- a/arch/arm/mach-asm9260/Kconfig +++ b/arch/arm/mach-asm9260/Kconfig @@ -2,6 +2,7 @@ config MACH_ASM9260 bool "Alphascale ASM9260" depends on ARCH_MULTI_V5 + depends on CPU_LITTLE_ENDIAN select CPU_ARM926T select ASM9260_TIMER help diff --git a/arch/arm/mach-aspeed/Kconfig b/arch/arm/mach-aspeed/Kconfig index ea96d11b8502..cd8a15be0724 100644 --- a/arch/arm/mach-aspeed/Kconfig +++ b/arch/arm/mach-aspeed/Kconfig @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only menuconfig ARCH_ASPEED bool "Aspeed BMC architectures" - depends on ARCH_MULTI_V5 || ARCH_MULTI_V6 || ARCH_MULTI_V7 + depends on (CPU_LITTLE_ENDIAN && ARCH_MULTI_V5) || ARCH_MULTI_V6 || ARCH_MULTI_V7 select SRAM select WATCHDOG select ASPEED_WATCHDOG diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig index 279810381256..b427c8abc4c6 100644 --- a/arch/arm/mach-at91/Kconfig +++ b/arch/arm/mach-at91/Kconfig @@ -1,7 +1,8 @@ # SPDX-License-Identifier: GPL-2.0-only menuconfig ARCH_AT91 bool "AT91/Microchip SoCs" - depends on ARCH_MULTI_V4T || ARCH_MULTI_V5 || ARCH_MULTI_V7 || ARM_SINGLE_ARMV7M + depends on (CPU_LITTLE_ENDIAN && (ARCH_MULTI_V4T || ARCH_MULTI_V5)) || \ + ARCH_MULTI_V7 || ARM_SINGLE_ARMV7M select ARM_CPU_SUSPEND if PM && ARCH_MULTI_V7 select COMMON_CLK_AT91 select GPIOLIB diff --git a/arch/arm/mach-clps711x/Kconfig b/arch/arm/mach-clps711x/Kconfig index 314de9477b84..fd32e576ecd0 100644 --- a/arch/arm/mach-clps711x/Kconfig +++ b/arch/arm/mach-clps711x/Kconfig @@ -2,6 +2,7 @@ menuconfig ARCH_CLPS711X bool "Cirrus Logic EP721x/EP731x-based" depends on ARCH_MULTI_V4T + depends on CPU_LITTLE_ENDIAN select CLPS711X_TIMER select CPU_ARM720T select GPIOLIB diff --git a/arch/arm/mach-davinci/Kconfig b/arch/arm/mach-davinci/Kconfig index 1d3aef84287d..008cbc2ab867 100644 --- a/arch/arm/mach-davinci/Kconfig +++ b/arch/arm/mach-davinci/Kconfig @@ -3,6 +3,7 @@ menuconfig ARCH_DAVINCI bool "TI DaVinci" depends on ARCH_MULTI_V5 + depends on CPU_LITTLE_ENDIAN select DAVINCI_TIMER select ZONE_DMA select PM_GENERIC_DOMAINS if PM diff --git a/arch/arm/mach-ep93xx/Kconfig b/arch/arm/mach-ep93xx/Kconfig index aa502ab57404..21f4cc2ba651 100644 --- a/arch/arm/mach-ep93xx/Kconfig +++ b/arch/arm/mach-ep93xx/Kconfig @@ -2,6 +2,7 @@ menuconfig ARCH_EP93XX bool "EP93xx-based" depends on ARCH_MULTI_V4T + depends on CPU_LITTLE_ENDIAN select ARCH_SPARSEMEM_ENABLE select ARM_AMBA select ARM_VIC diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig index f7d993628cb7..51a336f349f4 100644 --- a/arch/arm/mach-exynos/Kconfig +++ b/arch/arm/mach-exynos/Kconfig @@ -8,7 +8,6 @@ menuconfig ARCH_EXYNOS bool "Samsung Exynos" depends on ARCH_MULTI_V7 - select ARCH_SUPPORTS_BIG_ENDIAN select ARM_AMBA select ARM_GIC select EXYNOS_IRQ_COMBINER diff --git a/arch/arm/mach-gemini/Kconfig b/arch/arm/mach-gemini/Kconfig index 969674ea5f17..f436a2009eca 100644 --- a/arch/arm/mach-gemini/Kconfig +++ b/arch/arm/mach-gemini/Kconfig @@ -2,6 +2,7 @@ menuconfig ARCH_GEMINI bool "Cortina Systems Gemini" depends on ARCH_MULTI_V4 + depends on CPU_LITTLE_ENDIAN select ARCH_HAS_RESET_CONTROLLER select ARM_AMBA select ARM_APPENDED_DTB # Old Redboot bootloaders deployed diff --git a/arch/arm/mach-highbank/Kconfig b/arch/arm/mach-highbank/Kconfig index 9de38ce8124f..c2d6ef6b3927 100644 --- a/arch/arm/mach-highbank/Kconfig +++ b/arch/arm/mach-highbank/Kconfig @@ -2,7 +2,6 @@ config ARCH_HIGHBANK bool "Calxeda ECX-1000/2000 (Highbank/Midway)" depends on ARCH_MULTI_V7 - select ARCH_SUPPORTS_BIG_ENDIAN select ARM_AMBA select ARM_ERRATA_764369 if SMP select ARM_ERRATA_775420 diff --git a/arch/arm/mach-hisi/Kconfig b/arch/arm/mach-hisi/Kconfig index 2e980f834a6a..75cccbd3f05f 100644 --- a/arch/arm/mach-hisi/Kconfig +++ b/arch/arm/mach-hisi/Kconfig @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only config ARCH_HISI bool "Hisilicon SoC Support" - depends on ARCH_MULTI_V7 || ARCH_MULTI_V5 + depends on ARCH_MULTI_V7 || (ARCH_MULTI_V5 && CPU_LITTLE_ENDIAN) select ARM_AMBA select ARM_GIC if ARCH_MULTI_V7 select ARM_TIMER_SP804 diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig index c5a59158722b..696c59fe4588 100644 --- a/arch/arm/mach-imx/Kconfig +++ b/arch/arm/mach-imx/Kconfig @@ -1,8 +1,8 @@ # SPDX-License-Identifier: GPL-2.0-only menuconfig ARCH_MXC bool "Freescale i.MX family" - depends on ARCH_MULTI_V4_V5 || ARCH_MULTI_V6_V7 || ARM_SINGLE_ARMV7M - select ARCH_SUPPORTS_BIG_ENDIAN + depends on (ARCH_MULTI_V4_V5 && CPU_LITTLE_ENDIAN) || \ + ARCH_MULTI_V6_V7 || ARM_SINGLE_ARMV7M select CLKSRC_IMX_GPT select GENERIC_IRQ_CHIP select GPIOLIB diff --git a/arch/arm/mach-iop32x/Kconfig b/arch/arm/mach-iop32x/Kconfig index 07dd137b8867..01f60a8e6404 100644 --- a/arch/arm/mach-iop32x/Kconfig +++ b/arch/arm/mach-iop32x/Kconfig @@ -2,6 +2,7 @@ menuconfig ARCH_IOP32X bool "IOP32x-based platforms" depends on ARCH_MULTI_V5 + depends on CPU_LITTLE_ENDIAN select CPU_XSCALE select GPIO_IOP select GPIOLIB diff --git a/arch/arm/mach-keystone/Kconfig b/arch/arm/mach-keystone/Kconfig index cfd39f729f8e..de69cc2dd483 100644 --- a/arch/arm/mach-keystone/Kconfig +++ b/arch/arm/mach-keystone/Kconfig @@ -8,7 +8,6 @@ config ARCH_KEYSTONE select ARCH_HAS_RESET_CONTROLLER select ARM_ERRATA_798181 if SMP select COMMON_CLK_KEYSTONE - select ARCH_SUPPORTS_BIG_ENDIAN select ZONE_DMA if ARM_LPAE select PINCTRL select PM_GENERIC_DOMAINS if PM diff --git a/arch/arm/mach-lpc32xx/Kconfig b/arch/arm/mach-lpc32xx/Kconfig index ec87c65f4536..35730d3696d0 100644 --- a/arch/arm/mach-lpc32xx/Kconfig +++ b/arch/arm/mach-lpc32xx/Kconfig @@ -3,6 +3,7 @@ config ARCH_LPC32XX bool "NXP LPC32XX" depends on ARCH_MULTI_V5 + depends on CPU_LITTLE_ENDIAN select ARM_AMBA select CLKSRC_LPC32XX select CPU_ARM926T diff --git a/arch/arm/mach-mmp/Kconfig b/arch/arm/mach-mmp/Kconfig index 0dd999212944..9642e6663a52 100644 --- a/arch/arm/mach-mmp/Kconfig +++ b/arch/arm/mach-mmp/Kconfig @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only menuconfig ARCH_MMP bool "Marvell PXA168/910/MMP2/MMP3" - depends on ARCH_MULTI_V5 || ARCH_MULTI_V7 + depends on (CPU_LITTLE_ENDIAN && ARCH_MULTI_V5) || ARCH_MULTI_V7 select GPIO_PXA select GPIOLIB select PINCTRL diff --git a/arch/arm/mach-moxart/Kconfig b/arch/arm/mach-moxart/Kconfig index 31ada63ba51b..909c6573ba8b 100644 --- a/arch/arm/mach-moxart/Kconfig +++ b/arch/arm/mach-moxart/Kconfig @@ -2,6 +2,7 @@ menuconfig ARCH_MOXART bool "MOXA ART SoC" depends on ARCH_MULTI_V4 + depends on CPU_LITTLE_ENDIAN select CPU_FA526 select ARM_DMA_MEM_BUFFERABLE select FARADAY_FTINTC010 diff --git a/arch/arm/mach-mv78xx0/Kconfig b/arch/arm/mach-mv78xx0/Kconfig index ea52c7fabb79..f0276f0d1102 100644 --- a/arch/arm/mach-mv78xx0/Kconfig +++ b/arch/arm/mach-mv78xx0/Kconfig @@ -2,6 +2,7 @@ menuconfig ARCH_MV78XX0 bool "Marvell MV78xx0" depends on ARCH_MULTI_V5 + depends on CPU_LITTLE_ENDIAN select CPU_FEROCEON select GPIOLIB select MVEBU_MBUS diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig index 34dbeaab94b0..9f60a6fe0eaf 100644 --- a/arch/arm/mach-mvebu/Kconfig +++ b/arch/arm/mach-mvebu/Kconfig @@ -1,8 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only menuconfig ARCH_MVEBU bool "Marvell Engineering Business Unit (MVEBU) SoCs" - depends on ARCH_MULTI_V7 || ARCH_MULTI_V5 - select ARCH_SUPPORTS_BIG_ENDIAN + depends on ARCH_MULTI_V7 || (ARCH_MULTI_V5 && CPU_LITTLE_ENDIAN) select CLKSRC_MMIO select PINCTRL select PLAT_ORION diff --git a/arch/arm/mach-mxs/Kconfig b/arch/arm/mach-mxs/Kconfig index be1c1388055a..26dd8b9b7321 100644 --- a/arch/arm/mach-mxs/Kconfig +++ b/arch/arm/mach-mxs/Kconfig @@ -16,6 +16,7 @@ config SOC_IMX28 config ARCH_MXS bool "Freescale MXS (i.MX23, i.MX28) support" depends on ARCH_MULTI_V5 + depends on CPU_LITTLE_ENDIAN select GPIOLIB select MXS_TIMER select PINCTRL diff --git a/arch/arm/mach-nomadik/Kconfig b/arch/arm/mach-nomadik/Kconfig index e98429be2b18..d1f819468e94 100644 --- a/arch/arm/mach-nomadik/Kconfig +++ b/arch/arm/mach-nomadik/Kconfig @@ -2,6 +2,7 @@ menuconfig ARCH_NOMADIK bool "ST-Ericsson Nomadik" depends on ARCH_MULTI_V5 + depends on CPU_LITTLE_ENDIAN select ARM_AMBA select ARM_VIC select CLKSRC_NOMADIK_MTU diff --git a/arch/arm/mach-npcm/Kconfig b/arch/arm/mach-npcm/Kconfig index a71cf1d189ae..63b42a19d1b8 100644 --- a/arch/arm/mach-npcm/Kconfig +++ b/arch/arm/mach-npcm/Kconfig @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only menuconfig ARCH_NPCM bool "Nuvoton NPCM Architecture" - depends on ARCH_MULTI_V5 || ARCH_MULTI_V7 + depends on (ARCH_MULTI_V5 && CPU_LITTLE_ENDIAN) || ARCH_MULTI_V7 select PINCTRL if ARCH_NPCM diff --git a/arch/arm/mach-nspire/Kconfig b/arch/arm/mach-nspire/Kconfig index 6ef1b167619b..eb9916233dea 100644 --- a/arch/arm/mach-nspire/Kconfig +++ b/arch/arm/mach-nspire/Kconfig @@ -2,6 +2,7 @@ config ARCH_NSPIRE bool "TI-NSPIRE based" depends on ARCH_MULTI_V4_V5 + depends on CPU_LITTLE_ENDIAN select CPU_ARM926T select GENERIC_IRQ_CHIP select ARM_AMBA diff --git a/arch/arm/mach-orion5x/Kconfig b/arch/arm/mach-orion5x/Kconfig index c77f3b4e287b..bf833b51931d 100644 --- a/arch/arm/mach-orion5x/Kconfig +++ b/arch/arm/mach-orion5x/Kconfig @@ -2,6 +2,7 @@ menuconfig ARCH_ORION5X bool "Marvell Orion" depends on ARCH_MULTI_V5 + depends on CPU_LITTLE_ENDIAN select CPU_FEROCEON select GPIOLIB select MVEBU_MBUS diff --git a/arch/arm/mach-oxnas/Kconfig b/arch/arm/mach-oxnas/Kconfig index bee5f64c2e5f..a9ded7079268 100644 --- a/arch/arm/mach-oxnas/Kconfig +++ b/arch/arm/mach-oxnas/Kconfig @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only menuconfig ARCH_OXNAS bool "Oxford Semiconductor OXNAS Family SoCs" + depends on (ARCH_MULTI_V5 && CPU_LITTLE_ENDIAN) || ARCH_MULTI_V6 select ARCH_HAS_RESET_CONTROLLER select COMMON_CLK_OXNAS select GPIOLIB @@ -11,7 +12,6 @@ menuconfig ARCH_OXNAS select RESET_OXNAS select VERSATILE_FPGA_IRQ select PINCTRL - depends on ARCH_MULTI_V5 || ARCH_MULTI_V6 help Support for OxNas SoC family developed by Oxford Semiconductor. diff --git a/arch/arm/mach-qcom/Kconfig b/arch/arm/mach-qcom/Kconfig index 466acc4a5e0c..109e126f7271 100644 --- a/arch/arm/mach-qcom/Kconfig +++ b/arch/arm/mach-qcom/Kconfig @@ -2,7 +2,6 @@ menuconfig ARCH_QCOM bool "Qualcomm Support" depends on ARCH_MULTI_V7 - select ARCH_SUPPORTS_BIG_ENDIAN select ARM_GIC select ARM_AMBA select PINCTRL diff --git a/arch/arm/mach-s3c/Kconfig.s3c24xx b/arch/arm/mach-s3c/Kconfig.s3c24xx index e388e265ba83..d7dc031abc7a 100644 --- a/arch/arm/mach-s3c/Kconfig.s3c24xx +++ b/arch/arm/mach-s3c/Kconfig.s3c24xx @@ -8,6 +8,7 @@ menuconfig ARCH_S3C24XX bool "Samsung S3C24XX SoCs" depends on ARCH_MULTI_V4T || ARCH_MULTI_V5 + depends on CPU_LITTLE_ENDIAN select ATAGS select CLKSRC_SAMSUNG_PWM select GPIO_SAMSUNG diff --git a/arch/arm/mach-socfpga/Kconfig b/arch/arm/mach-socfpga/Kconfig index 594edf9bbea4..eb72c240c248 100644 --- a/arch/arm/mach-socfpga/Kconfig +++ b/arch/arm/mach-socfpga/Kconfig @@ -3,7 +3,6 @@ menuconfig ARCH_INTEL_SOCFPGA bool "Altera SOCFPGA family" depends on ARCH_MULTI_V7 select ARCH_HAS_RESET_CONTROLLER - select ARCH_SUPPORTS_BIG_ENDIAN select ARM_AMBA select ARM_GIC select CACHE_L2X0 diff --git a/arch/arm/mach-spear/Kconfig b/arch/arm/mach-spear/Kconfig index 20e284563a80..1add7ee49b63 100644 --- a/arch/arm/mach-spear/Kconfig +++ b/arch/arm/mach-spear/Kconfig @@ -5,7 +5,7 @@ menuconfig PLAT_SPEAR bool "ST SPEAr Family" - depends on ARCH_MULTI_V7 || ARCH_MULTI_V5 + depends on ARCH_MULTI_V7 || (ARCH_MULTI_V5 && CPU_LITTLE_ENDIAN) select ARM_AMBA select CLKSRC_MMIO select GPIOLIB diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig index e5c2fce281cd..93cf70c0749b 100644 --- a/arch/arm/mach-sunxi/Kconfig +++ b/arch/arm/mach-sunxi/Kconfig @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only menuconfig ARCH_SUNXI bool "Allwinner SoCs" - depends on ARCH_MULTI_V5 || ARCH_MULTI_V7 + depends on (CPU_LITTLE_ENDIAN && ARCH_MULTI_V5) || ARCH_MULTI_V7 select ARCH_HAS_RESET_CONTROLLER select CLKSRC_MMIO select GENERIC_IRQ_CHIP @@ -40,7 +40,6 @@ config MACH_SUN7I default ARCH_SUNXI select ARM_GIC select ARM_PSCI - select ARCH_SUPPORTS_BIG_ENDIAN select HAVE_ARM_ARCH_TIMER select SUN5I_HSTIMER diff --git a/arch/arm/mach-versatile/Kconfig b/arch/arm/mach-versatile/Kconfig index 94b492c12e8d..2ef226194c3a 100644 --- a/arch/arm/mach-versatile/Kconfig +++ b/arch/arm/mach-versatile/Kconfig @@ -2,6 +2,7 @@ config ARCH_VERSATILE bool "ARM Ltd. Versatile family" depends on ARCH_MULTI_V5 + depends on CPU_LITTLE_ENDIAN select ARM_AMBA select ARM_TIMER_SP804 select ARM_VIC @@ -19,6 +20,7 @@ config ARCH_VERSATILE menuconfig ARCH_INTEGRATOR bool "ARM Ltd. Integrator family" depends on ARCH_MULTI_V4T || ARCH_MULTI_V5 || ARCH_MULTI_V6 + depends on CPU_LITTLE_ENDIAN || ARCH_MULTI_V6 select ARM_AMBA select CMA select DMA_CMA @@ -143,7 +145,7 @@ endif menuconfig ARCH_REALVIEW bool "ARM Ltd. RealView family" - depends on ARCH_MULTI_V5 || ARCH_MULTI_V6 || ARCH_MULTI_V7 + depends on (CPU_LITTLE_ENDIAN && ARCH_MULTI_V5) || ARCH_MULTI_V6 || ARCH_MULTI_V7 select ARM_AMBA select ARM_GIC select ARM_TIMER_SP804 @@ -247,7 +249,6 @@ endif menuconfig ARCH_VEXPRESS bool "ARM Ltd. Versatile Express family" depends on ARCH_MULTI_V7 - select ARCH_SUPPORTS_BIG_ENDIAN select ARM_AMBA select ARM_GIC select ARM_GLOBAL_TIMER diff --git a/arch/arm/mach-vt8500/Kconfig b/arch/arm/mach-vt8500/Kconfig index d01cdd9ad9c7..1aad54ea3c3d 100644 --- a/arch/arm/mach-vt8500/Kconfig +++ b/arch/arm/mach-vt8500/Kconfig @@ -10,6 +10,7 @@ config ARCH_VT8500 config ARCH_WM8505 bool "VIA/Wondermedia 85xx and WM8650" depends on ARCH_MULTI_V5 + depends on CPU_LITTLE_ENDIAN select ARCH_VT8500 select CPU_ARM926T diff --git a/arch/arm/mach-zynq/Kconfig b/arch/arm/mach-zynq/Kconfig index a56748d671c4..05be5aa9b402 100644 --- a/arch/arm/mach-zynq/Kconfig +++ b/arch/arm/mach-zynq/Kconfig @@ -3,7 +3,6 @@ config ARCH_ZYNQ bool "Xilinx Zynq ARM Cortex A9 Platform" depends on ARCH_MULTI_V7 select ARCH_HAS_RESET_CONTROLLER - select ARCH_SUPPORTS_BIG_ENDIAN select ARM_AMBA select ARM_GIC select ARM_GLOBAL_TIMER diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index d30ee26ccc87..a3a4589ec73b 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -738,15 +738,29 @@ config SWP_EMULATE If unsure, say Y. +choice + prompt "CPU Endianess" + default CPU_LITTLE_ENDIAN + +config CPU_LITTLE_ENDIAN + bool "Built little-endian kernel" + help + Say Y if you plan on running a kernel in little-endian mode. + This is the default and is used in practically all modern user + space builds. + config CPU_BIG_ENDIAN bool "Build big-endian kernel" - depends on ARCH_SUPPORTS_BIG_ENDIAN depends on !LD_IS_LLD help Say Y if you plan on running a kernel in big-endian mode. - Note that your board must be properly built and your board - port must properly enable any big-endian related features - of your chipset/board/processor. + This works on many machines using ARMv6 or newer processors + but requires big-endian user space. + + The only ARMv5 platform with big-endian support is + Intel IXP4xx. + +endchoice config CPU_ENDIAN_BE8 bool @@ -1122,12 +1136,6 @@ config ARM_DMA_MEM_BUFFERABLE config ARM_HEAVY_MB bool -config ARCH_SUPPORTS_BIG_ENDIAN - bool - help - This option specifies the architecture can support big endian - operation. - config DEBUG_ALIGN_RODATA bool "Make rodata strictly non-executable" depends on STRICT_KERNEL_RWX