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Date: Mon, 14 Apr 2014 16:40:51 +0900 From: Jungseok Lee <jays.lee@...sung.com> To: linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu, Catalin.Marinas@....com, Marc Zyngier <Marc.Zyngier@....com>, Christoffer Dall <christoffer.dall@...aro.org> Cc: linux-kernel@...r.kernel.org, linux-samsung-soc <linux-samsung-soc@...r.kernel.org>, sungjinn.chung@...sung.com, Arnd Bergmann <arnd@...db.de>, kgene.kim@...sung.com, ilho215.lee@...sung.com Subject: [PATCH 4/8] arm64: Introduce a kernel configuration option for VA_BITS This patch adds a kernel configuration for VA_BITS. It helps to prevent unnecessary #ifdef statements insertions for VA_BITS when implementing different page sizes and level of translation tables. Signed-off-by: Jungseok Lee <jays.lee@...sung.com> Reviewed-by: Sungjinn Chung <sungjinn.chung@...sung.com> --- arch/arm64/Kconfig | 8 ++++++++ arch/arm64/include/asm/memory.h | 6 +----- 2 files changed, 9 insertions(+), 5 deletions(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 1a2faf9..431acbc 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -186,6 +186,14 @@ config ARM64_3_LEVELS endchoice +config ARM64_VA_BITS + int "Virtual address space size" + range 39 39 if ARM64_4K_PAGES && ARM64_3_LEVELS + range 42 42 if ARM64_64K_PAGES && ARM64_2_LEVELS + help + This feature is determined by a combination of page size and + level of translation tables. + config CPU_BIG_ENDIAN bool "Build big-endian kernel" help diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index e94f945..f6e7480 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -41,11 +41,7 @@ * The module space lives between the addresses given by TASK_SIZE * and PAGE_OFFSET - it must be within 128MB of the kernel text. */ -#ifdef CONFIG_ARM64_64K_PAGES -#define VA_BITS (42) -#else -#define VA_BITS (39) -#endif +#define VA_BITS (CONFIG_ARM64_VA_BITS) #define PAGE_OFFSET (UL(0xffffffffffffffff) << (VA_BITS - 1)) #define MODULES_END (PAGE_OFFSET) #define MODULES_VADDR (MODULES_END - SZ_64M) -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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