Messages in this thread Patch in this message | | | From | Geert Uytterhoeven <> | Subject | [PATCH] [RFC] arm: Replace "multiple platforms" by "common platform" | Date | Thu, 21 Jun 2018 17:59:06 +0200 |
| |
"ARM multiplatform" has actually two meanings: 1. It groups platforms that follow the "ARM multiplatform" software framework, 2. It allows to build a single kernel that can be booted on multiple platforms.
Currently support for XIP and/or NOMMU cannot be enabled on platforms that follow the "ARM multiplatform" framework, without duplicating their machine selection logic under a new Kconfig symbol. As (in theory) all platforms can be used with XIP and/or NOMMU, this is not sustainable.
Hence clarify the meaning of ARCH_MULTIPLATFORM: 1. Replace "multiple platforms" by "common platform", as it allows to select one or more platforms adhering to the common framework, 2. Note that a single kernel may not boot on all platforms if XIP or NOMMU is enabled.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- References: - "[PATCHv4 0/4] arm/versatile: no-MMU support" (http://lists.infradead.org/pipermail/linux-arm-kernel/2018-June/584555.html)
- "[PATCH 0/2] ARM: ARMv7 (with MMU) XIP without ARCH_MULTIPLATFORM" (http://lists.infradead.org/pipermail/linux-arm-kernel/2017-February/486835.html)
arch/arm/Kconfig | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 54eeb8d00bc62a9f..6b286c018cf748c7 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -329,7 +329,7 @@ choice default ARCH_MULTIPLATFORM if MMU config ARCH_MULTIPLATFORM - bool "Allow multiple platforms to be selected" + bool "Common platforms (\"multiplatform\")" depends on MMU select ARM_HAS_SG_CHAIN select ARM_PATCH_PHYS_VIRT @@ -342,6 +342,13 @@ config ARCH_MULTIPLATFORM select PCI_DOMAINS if PCI select SPARSE_IRQ select USE_OF + help + Support for systems implemented using the common "multiplatform" + framework. + + Unless specialized options depending on intimate platform + details, like XIP or NOMMU, are enabled, this allows to build a + single kernel that boots on multiple platforms. config ARM_SINGLE_ARMV7M bool "ARMv7-M based platforms (Cortex-M0/M3/M4)" -- 2.17.1
| |