Commit 0dde507c authored by Hongchen Zhang's avatar Hongchen Zhang
Browse files

LoongArch: use 40 bits address space for user 

LoongArch inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I6BWFP



--------------------------------

default to use 40 bits address space for user.

Signed-off-by: default avatarHongchen Zhang <zhanghongchen@loongson.cn>
Change-Id: I23088f43e700ed9b4eb15df2cc9c58299a0582ff
parent a51ad547

arch/loongarch/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -426,6 +426,13 @@ config NODES_SHIFT 
	default "6"

	depends on NUMA



config VA_BITS_40

	bool "40-bits"

	default y

	depends on 64BIT

	help

	  Support a maximum at least 40 bits of application virtual memory.



config FORCE_MAX_ZONEORDER

	int "Maximum zone order"

	range 14 64 if PAGE_SIZE_64KB

arch/loongarch/include/asm/pgtable.h

+4 −0
Original line number Diff line number Diff line
@@ -42,7 +42,11 @@ 
#define PGDIR_SIZE	(1UL << PGDIR_SHIFT)

#define PGDIR_MASK	(~(PGDIR_SIZE-1))



#ifdef CONFIG_VA_BITS_40

#define VA_BITS		40

#else

#define VA_BITS		(PGDIR_SHIFT + (PAGE_SHIFT - 3))

#endif



#define PTRS_PER_PGD	(PAGE_SIZE >> 3)

#if CONFIG_PGTABLE_LEVELS > 3