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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 /Documentation/arm64 | |
| parent | 7078db46215f9137801a122f87ac31c504220a94 (diff) | |
| download | linux-383c2799113b00a5f12c820ff0fd3dfca9e5be89.tar.gz | |
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 'Documentation/arm64')
| -rw-r--r-- | Documentation/arm64/memory.txt | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/arm64/memory.txt b/Documentation/arm64/memory.txt index 8845d0847a66..344e85cc7323 100644 --- a/Documentation/arm64/memory.txt +++ b/Documentation/arm64/memory.txt @@ -45,6 +45,14 @@ Start End Size Use fffffc0000000000 ffffffffffffffff 4TB kernel +AArch64 Linux memory layout with 64KB pages + 3 levels: + +Start End Size Use +----------------------------------------------------------------------- +0000000000000000 0000ffffffffffff 256TB user +ffff000000000000 ffffffffffffffff 256TB kernel + + For details of the virtual kernel memory layout please see the kernel booting log. |