Commit 031e011d8b22 ("arm64: mm: Move PCI I/O emulation region above
the vmemmap region") and commit b730b0f2b1fc ("arm64: mm: Move fixmap
region above vmemmap region") have placed PCI I/O and fixmap region
above vmemmap region.
And commit 32697ff38287 ("arm64: vmemmap: Avoid base2 order of struct
page size to dimension region") has moved vmemmap region to higher
address.
Update document as the memory layout modified by the previous patches.
Signed-off-by: Sangmoon Kim <sangmoon.kim@xxxxxxxxxxx>
---
Documentation/arch/arm64/memory.rst | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff --git a/Documentation/arch/arm64/memory.rst b/Documentation/arch/arm64/memory.rst
index 8a658984b8bb..43c15cea2ec9 100644
--- a/Documentation/arch/arm64/memory.rst
+++ b/Documentation/arch/arm64/memory.rst
@@ -32,13 +32,13 @@ AArch64 Linux memory layout with 4KB pages + 4 levels (48-bit)::
ffff000000000000 ffff7fffffffffff 128TB kernel logical memory map
[ffff600000000000 ffff7fffffffffff] 32TB [kasan shadow region]
ffff800000000000 ffff80007fffffff 2GB modules
- ffff800080000000 fffffbffefffffff 124TB vmalloc
- fffffbfff0000000 fffffbfffdffffff 224MB fixed mappings (top down)
- fffffbfffe000000 fffffbfffe7fffff 8MB [guard region]
- fffffbfffe800000 fffffbffff7fffff 16MB PCI I/O space
- fffffbffff800000 fffffbffffffffff 8MB [guard region]
- fffffc0000000000 fffffdffffffffff 2TB vmemmap
- fffffe0000000000 ffffffffffffffff 2TB [guard region]
+ ffff800080000000 fffffdffbf7fffff 126TB vmalloc
+ fffffdffbf800000 fffffdffbfffffff 8MB [guard region]
+ fffffdffc0000000 ffffffffbfffffff 2TB vmemmap
+ ffffffffc0000000 ffffffffc07fffff 8MB [guard region]
+ ffffffffc0800000 ffffffffc17fffff 16MB PCI I/O space
+ ffffffffc1800000 ffffffffff7fffff 992MB fixed mappings (top down)
+ ffffffffff800000 ffffffffffffffff 8MB [guard region]
AArch64 Linux memory layout with 64KB pages + 3 levels (52-bit with HW support)::
@@ -49,13 +49,13 @@ AArch64 Linux memory layout with 64KB pages + 3 levels (52-bit with HW support):
fff0000000000000 ffff7fffffffffff ~4PB kernel logical memory map
[fffd800000000000 ffff7fffffffffff] 512TB [kasan shadow region]
ffff800000000000 ffff80007fffffff 2GB modules
- ffff800080000000 fffffbffefffffff 124TB vmalloc
- fffffbfff0000000 fffffbfffdffffff 224MB fixed mappings (top down)
- fffffbfffe000000 fffffbfffe7fffff 8MB [guard region]
- fffffbfffe800000 fffffbffff7fffff 16MB PCI I/O space
- fffffbffff800000 fffffbffffffffff 8MB [guard region]
- fffffc0000000000 ffffffdfffffffff ~4TB vmemmap
- ffffffe000000000 ffffffffffffffff 128GB [guard region]
+ ffff800080000000 fffffc1fbf7fffff 124TB vmalloc
+ fffffc1fbf800000 fffffc1fbfffffff 8MB [guard region]
+ fffffc1fc0000000 ffffffffbfffffff ~4TB vmemmap
+ ffffffffc0000000 ffffffffc07fffff 8MB [guard region]
+ ffffffffc0800000 ffffffffc17fffff 16MB PCI I/O space
+ ffffffffc1800000 ffffffffff7fffff 992MB fixed mappings (top down)
+ ffffffffff800000 ffffffffffffffff 8MB [guard region]
Translation table lookup with 4KB pages::
--
2.47.1
