From mboxrd@z Thu Jan 1 00:00:00 1970 From: kristina.martsenko@arm.com (Kristina Martsenko) Date: Wed, 13 Dec 2017 17:07:23 +0000 Subject: [PATCH 08/10] arm64: increase sparsemem MAX_PHYSMEM_BITS to 52 In-Reply-To: <1513184845-8711-1-git-send-email-kristina.martsenko@arm.com> References: <1513184845-8711-1-git-send-email-kristina.martsenko@arm.com> Message-ID: <1513184845-8711-9-git-send-email-kristina.martsenko@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Sparsemem is used to store page structs and other information for each physical page in the system. In order to support 52-bit physical memory, increase MAX_PHYSMEM_BITS to 52 when 52-bit physical memory is configured. If it is not configured, then the kernel can't use 52-bit memory, so leave MAX_PHYSMEM_BITS at 48 in that case. (The kconfig option to set ARM64_PA_BITS to 52 will be added in a later patch.) Signed-off-by: Kristina Martsenko --- arch/arm64/include/asm/sparsemem.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/sparsemem.h b/arch/arm64/include/asm/sparsemem.h index 74a9d301819f..b299929fe56c 100644 --- a/arch/arm64/include/asm/sparsemem.h +++ b/arch/arm64/include/asm/sparsemem.h @@ -17,7 +17,7 @@ #define __ASM_SPARSEMEM_H #ifdef CONFIG_SPARSEMEM -#define MAX_PHYSMEM_BITS 48 +#define MAX_PHYSMEM_BITS CONFIG_ARM64_PA_BITS #define SECTION_SIZE_BITS 30 #endif -- 2.1.4