On Mon, Oct 31, 2022 at 07:02:30PM +0100, Björn Töpel wrote: > + > + > +RISC-V Linux Kernel SV57 > +------------------------ > + > +:: > + > + ======================================================================================================================== > + Start addr | Offset | End addr | Size | VM area description > + ======================================================================================================================== > + | | | | > + 0000000000000000 | 0 | 00ffffffffffffff | 64 PB | user-space virtual memory, different per mm > + __________________|____________|__________________|_________|___________________________________________________________ > + | | | | > + 0100000000000000 | +64 PB | feffffffffffffff | ~16K PB | ... huge, almost 64 bits wide hole of non-canonical > + | | | | virtual memory addresses up to the -64 PB > + | | | | starting offset of kernel mappings. > + __________________|____________|__________________|_________|___________________________________________________________ > + | > + | Kernel-space virtual memory, shared between all processes: > + ____________________________________________________________|___________________________________________________________ > + | | | | > + ff1bfffffee00000 | -57 PB | ff1bfffffeffffff | 2 MB | fixmap > + ff1bffffff000000 | -57 PB | ff1bffffffffffff | 16 MB | PCI io > + ff1c000000000000 | -57 PB | ff1fffffffffffff | 1 PB | vmemmap > + ff20000000000000 | -56 PB | ff5fffffffffffff | 16 PB | vmalloc/ioremap space > + ff60000000000000 | -40 PB | ffdffffeffffffff | 32 PB | direct mapping of all physical memory > + ffdfffff00000000 | - 8 PB | fffffffeffffffff | 8 PB | 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 > + __________________|____________|__________________|_________|____________________________________________________________ The memory layout figure above should have been in table format (it is written as such, isn't it?): ---- >8 ---- diff --git a/Documentation/riscv/vm-layout.rst b/Documentation/riscv/vm-layout.rst index 35f76798b6e41b..f87b63a0cc9cfa 100644 --- a/Documentation/riscv/vm-layout.rst +++ b/Documentation/riscv/vm-layout.rst @@ -102,34 +102,32 @@ RISC-V Linux Kernel SV48 RISC-V Linux Kernel SV57 ------------------------ -:: - - ======================================================================================================================== - Start addr | Offset | End addr | Size | VM area description - ======================================================================================================================== - | | | | - 0000000000000000 | 0 | 00ffffffffffffff | 64 PB | user-space virtual memory, different per mm - __________________|____________|__________________|_________|___________________________________________________________ - | | | | - 0100000000000000 | +64 PB | feffffffffffffff | ~16K PB | ... huge, almost 64 bits wide hole of non-canonical - | | | | virtual memory addresses up to the -64 PB - | | | | starting offset of kernel mappings. - __________________|____________|__________________|_________|___________________________________________________________ - | - | Kernel-space virtual memory, shared between all processes: - ____________________________________________________________|___________________________________________________________ - | | | | - ff1bfffffee00000 | -57 PB | ff1bfffffeffffff | 2 MB | fixmap - ff1bffffff000000 | -57 PB | ff1bffffffffffff | 16 MB | PCI io - ff1c000000000000 | -57 PB | ff1fffffffffffff | 1 PB | vmemmap - ff20000000000000 | -56 PB | ff5fffffffffffff | 16 PB | vmalloc/ioremap space - ff60000000000000 | -40 PB | ffdffffeffffffff | 32 PB | direct mapping of all physical memory - ffdfffff00000000 | - 8 PB | fffffffeffffffff | 8 PB | 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 | 00ffffffffffffff | 64 PB | user-space virtual memory, different per mm | + +------------------+--------+------------------+---------+--------------------------------------------------------------+ + | 0100000000000000 | +64 PB | feffffffffffffff | ~16K PB | ... huge, almost 64 bits wide hole of non-canonical | + | | | | | virtual memory addresses up to the -64 PB | + | | | | | starting offset of kernel mappings. | + +------------------+--------+------------------+---------+--------------------------------------------------------------+ + | Kernel-space virtual memory, shared between all processes: | + +------------------+--------+------------------+---------+--------------------------------------------------------------+ + | ff1bfffffee00000 | -57 PB | ff1bfffffeffffff | 2 MB | fixmap | + +------------------+--------+------------------+---------+--------------------------------------------------------------+ + | ff1bffffff000000 | -57 PB | ff1bffffffffffff | 16 MB | PCI io | + +------------------+--------+------------------+---------+--------------------------------------------------------------+ + | ff1c000000000000 | -57 PB | ff1fffffffffffff | 1 PB | vmemmap | + +------------------+--------+------------------+---------+--------------------------------------------------------------+ + | ff20000000000000 | -56 PB | ff5fffffffffffff | 16 PB | vmalloc/ioremap space | + +------------------+--------+------------------+---------+--------------------------------------------------------------+ + | ff60000000000000 | -40 PB | ffdffffeffffffff | 32 PB | direct mapping of all physical memory | + +------------------+--------+------------------+---------+--------------------------------------------------------------+ + | ffdfffff00000000 | -8 PB | fffffffeffffffff | 8 PB | 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 | + +------------------+--------+------------------+---------+--------------------------------------------------------------+ However, for consistency, other similar figures should also be converted to tables (as separate patch). Thanks. -- An old man doll... just what I always wanted! - Clara
Attachment:
signature.asc
Description: PGP signature
