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| author | Catalin Marinas <catalin.marinas@arm.com> | 2014-07-21 15:54:50 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2014-07-23 15:28:15 +0100 |
| commit | 383c2799113b00a5f12c820ff0fd3dfca9e5be89 (patch) | |
| tree | f2f9788dcbfa62fe6160cae82e67b8d83eca5bc0 /arch/arm64/kernel/head.S | |
| parent | 7078db46215f9137801a122f87ac31c504220a94 (diff) | |
| download | linux-383c2799113b00a5f12c820ff0fd3dfca9e5be89.tar.gz linux-383c2799113b00a5f12c820ff0fd3dfca9e5be89.tar.bz2 linux-383c2799113b00a5f12c820ff0fd3dfca9e5be89.zip | |
arm64: Add support for 48-bit VA space with 64KB page configuration
This patch allows support for 3 levels of page tables with 64KB page
configuration allowing 48-bit VA space. The pgd is no longer a full
PAGE_SIZE (PTRS_PER_PGD is 64) and (swapper|idmap)_pg_dir are not fully
populated (pgd_alloc falls back to kzalloc).
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Jungseok Lee <jungseoklee85@gmail.com>
Diffstat (limited to 'arch/arm64/kernel/head.S')
| -rw-r--r-- | arch/arm64/kernel/head.S | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index a6db505411bc..0bce493495e9 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -55,9 +55,11 @@ #ifdef CONFIG_ARM64_64K_PAGES #define BLOCK_SHIFT PAGE_SHIFT #define BLOCK_SIZE PAGE_SIZE +#define TABLE_SHIFT PMD_SHIFT #else #define BLOCK_SHIFT SECTION_SHIFT #define BLOCK_SIZE SECTION_SIZE +#define TABLE_SHIFT PUD_SHIFT #endif #define KERNEL_START KERNEL_RAM_VADDR @@ -505,8 +507,8 @@ ENDPROC(__calc_phys_offset) */ .macro create_pgd_entry, tbl, virt, tmp1, tmp2 create_table_entry \tbl, \virt, PGDIR_SHIFT, PTRS_PER_PGD, \tmp1, \tmp2 -#if CONFIG_ARM64_PGTABLE_LEVELS == 4 - create_table_entry \tbl, \virt, PUD_SHIFT, PTRS_PER_PUD, \tmp1, \tmp2 +#if SWAPPER_PGTABLE_LEVELS == 3 + create_table_entry \tbl, \virt, TABLE_SHIFT, PTRS_PER_PTE, \tmp1, \tmp2 #endif .endm |