[PATCH] Documentation: riscv: tableize memory layout
Bagas Sanjaya
bagasdotme at gmail.com
Sun Nov 6 02:02:40 PST 2022
The memory layout is written as table but it is inside literal code
block, which renders as preformatted text. Write the layout in reST
grid table instead.
Signed-off-by: Bagas Sanjaya <bagasdotme at gmail.com>
---
Documentation/riscv/vm-layout.rst | 120 +++++++++++++++---------------
1 file changed, 58 insertions(+), 62 deletions(-)
diff --git a/Documentation/riscv/vm-layout.rst b/Documentation/riscv/vm-layout.rst
index 5b36e45fef60bd..139320e35de81f 100644
--- a/Documentation/riscv/vm-layout.rst
+++ b/Documentation/riscv/vm-layout.rst
@@ -30,70 +30,66 @@ the RISC-V Linux Kernel resides.
RISC-V Linux Kernel SV39
------------------------
-::
-
- ========================================================================================================================
- Start addr | Offset | End addr | Size | VM area description
- ========================================================================================================================
- | | | |
- 0000000000000000 | 0 | 0000003fffffffff | 256 GB | user-space virtual memory, different per mm
- __________________|____________|__________________|_________|___________________________________________________________
- | | | |
- 0000004000000000 | +256 GB | ffffffbfffffffff | ~16M TB | ... huge, almost 64 bits wide hole of non-canonical
- | | | | virtual memory addresses up to the -256 GB
- | | | | starting offset of kernel mappings.
- __________________|____________|__________________|_________|___________________________________________________________
- |
- | Kernel-space virtual memory, shared between all processes:
- ____________________________________________________________|___________________________________________________________
- | | | |
- ffffffc6fee00000 | -228 GB | ffffffc6feffffff | 2 MB | fixmap
- ffffffc6ff000000 | -228 GB | ffffffc6ffffffff | 16 MB | PCI io
- ffffffc700000000 | -228 GB | ffffffc7ffffffff | 4 GB | vmemmap
- ffffffc800000000 | -224 GB | ffffffd7ffffffff | 64 GB | vmalloc/ioremap space
- ffffffd800000000 | -160 GB | fffffff6ffffffff | 124 GB | direct mapping of all physical memory
- fffffff700000000 | -36 GB | fffffffeffffffff | 32 GB | kasan
- __________________|____________|__________________|_________|____________________________________________________________
- |
- |
- ____________________________________________________________|____________________________________________________________
- | | | |
- ffffffff00000000 | -4 GB | ffffffff7fffffff | 2 GB | modules, BPF
- ffffffff80000000 | -2 GB | ffffffffffffffff | 2 GB | kernel
- __________________|____________|__________________|_________|____________________________________________________________
+ +------------------+---------+------------------+---------+----------------------------------------------------------+
+ | Start addr | Offset | End addr | Size | VM area description |
+ +==================+=========+==================+=========+==========================================================+
+ | 0000000000000000 | 0 | 0000003fffffffff | 256 GB | user-space virtual memory, different per mm |
+ +------------------+---------+------------------+---------+----------------------------------------------------------+
+ | 0000004000000000 | +256 GB | ffffffbfffffffff | ~16M TB | ... huge, almost 64 bits wide hole of non-canonical |
+ | | | | | virtual memory addresses up to the -256 GB |
+ | | | | | starting offset of kernel mappings. |
+ +------------------+---------+------------------+---------+----------------------------------------------------------+
+ | Kernel-space virtual memory, shared between all processes: |
+ +------------------+---------+------------------+---------+----------------------------------------------------------+
+ | ffffffc6fee00000 | -228 GB | ffffffc6feffffff | 2 MB | fixmap |
+ +------------------+---------+------------------+---------+----------------------------------------------------------+
+ | ffffffc6ff000000 | -228 GB | ffffffc6ffffffff | 16 MB | PCI io |
+ +------------------+---------+------------------+---------+----------------------------------------------------------+
+ | ffffffc700000000 | -228 GB | ffffffc7ffffffff | 4 GB | vmemmap |
+ +------------------+---------+------------------+---------+----------------------------------------------------------+
+ | ffffffc800000000 | -224 GB | ffffffd7ffffffff | 64 GB | vmalloc/ioremap space |
+ +------------------+---------+------------------+---------+----------------------------------------------------------+
+ | ffffffd800000000 | -160 GB | fffffff6ffffffff | 124 GB | direct mapping of all physical memory |
+ +------------------+---------+------------------+---------+----------------------------------------------------------+
+ | fffffff700000000 | -36 GB | fffffffeffffffff | 32 GB | kasan |
+ +------------------+---------+------------------+---------+----------------------------------------------------------+
+ | Identical layout to the 39-bit one from here on: |
+ +------------------+---------+------------------+---------+----------------------------------------------------------+
+ | ffffffff00000000 | -4 GB | ffffffff7fffffff | 2 GB | modules, BPF |
+ +------------------+---------+------------------+---------+----------------------------------------------------------+
+ | ffffffff80000000 | -2 GB | ffffffffffffffff | 2 GB | kernel |
+ +------------------+---------+------------------+---------+----------------------------------------------------------+
RISC-V Linux Kernel SV48
------------------------
-::
-
- ========================================================================================================================
- Start addr | Offset | End addr | Size | VM area description
- ========================================================================================================================
- | | | |
- 0000000000000000 | 0 | 00007fffffffffff | 128 TB | user-space virtual memory, different per mm
- __________________|____________|__________________|_________|___________________________________________________________
- | | | |
- 0000800000000000 | +128 TB | ffff7fffffffffff | ~16M TB | ... huge, almost 64 bits wide hole of non-canonical
- | | | | virtual memory addresses up to the -128 TB
- | | | | starting offset of kernel mappings.
- __________________|____________|__________________|_________|___________________________________________________________
- |
- | Kernel-space virtual memory, shared between all processes:
- ____________________________________________________________|___________________________________________________________
- | | | |
- ffff8d7ffee00000 | -114.5 TB | ffff8d7ffeffffff | 2 MB | fixmap
- ffff8d7fff000000 | -114.5 TB | ffff8d7fffffffff | 16 MB | PCI io
- ffff8d8000000000 | -114.5 TB | ffff8f7fffffffff | 2 TB | vmemmap
- ffff8f8000000000 | -112.5 TB | ffffaf7fffffffff | 32 TB | vmalloc/ioremap space
- ffffaf8000000000 | -80.5 TB | ffffef7fffffffff | 64 TB | direct mapping of all physical memory
- ffffef8000000000 | -16.5 TB | fffffffeffffffff | 16.5 TB | kasan
- __________________|____________|__________________|_________|____________________________________________________________
- |
- | Identical layout to the 39-bit one from here on:
- ____________________________________________________________|____________________________________________________________
- | | | |
- ffffffff00000000 | -4 GB | ffffffff7fffffff | 2 GB | modules, BPF
- ffffffff80000000 | -2 GB | ffffffffffffffff | 2 GB | kernel
- __________________|____________|__________________|_________|____________________________________________________________
+ +------------------+-----------+------------------+---------+-------------------------------------------------------+
+ | Start addr | Offset | End addr | Size | VM area description |
+ +==================+===========+==================+=========+=======================================================+
+ | 0000000000000000 | 0 | 00007fffffffffff | 128 TB | user-space virtual memory, different per mm |
+ +------------------+-----------+------------------+---------+-------------------------------------------------------+
+ | 0000800000000000 | +128 TB | ffff7fffffffffff | ~16M TB | ... huge, almost 64 bits wide hole of non-canonical |
+ | | | | | virtual memory addresses up to the -128 TB |
+ | | | | | starting offset of kernel mappings. |
+ +------------------+-----------+------------------+---------+-------------------------------------------------------+
+ | Kernel-space virtual memory, shared between all processes: |
+ +------------------+-----------+------------------+---------+-------------------------------------------------------+
+ | ffff8d7ffee00000 | -114.5 TB | ffff8d7ffeffffff | 2 MB | fixmap |
+ +------------------+-----------+------------------+---------+-------------------------------------------------------+
+ | ffff8d7fff000000 | -114.5 TB | ffff8d7fffffffff | 16 MB | PCI io |
+ +------------------+-----------+------------------+---------+-------------------------------------------------------+
+ | ffff8d8000000000 | -114.5 TB | ffff8f7fffffffff | 2 TB | vmemmap |
+ +------------------+-----------+------------------+---------+-------------------------------------------------------+
+ | ffff8f8000000000 | -112.5 TB | ffffaf7fffffffff | 32 TB | vmalloc/ioremap space |
+ +------------------+-----------+------------------+---------+-------------------------------------------------------+
+ | ffffaf8000000000 | -80.5 TB | ffffef7fffffffff | 64 TB | direct mapping of all physical memory |
+ +------------------+-----------+------------------+---------+-------------------------------------------------------+
+ | ffffef8000000000 | -16.5 TB | fffffffeffffffff | 16.5 TB | kasan |
+ +------------------+-----------+------------------+---------+-------------------------------------------------------+
+ | Identical layout to the 39-bit one from here on: |
+ +------------------+-----------+------------------+---------+-------------------------------------------------------+
+ | ffffffff00000000 | -4 GB | ffffffff7fffffff | 2 GB | modules, BPF |
+ +------------------+-----------+------------------+---------+-------------------------------------------------------+
+ | ffffffff80000000 | -2 GB | ffffffffffffffff | 2 GB | kernel |
+ +------------------+-----------+------------------+---------+-------------------------------------------------------+
base-commit: 0cdb3579f1ee4c1e55acf8dfb0697b660067b1f8
--
An old man doll... just what I always wanted! - Clara
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