linux/arch/riscv/mm
Vitaly Wool 44c9225729
RISC-V: enable XIP
Introduce XIP (eXecute In Place) support for RISC-V platforms.
It allows code to be executed directly from non-volatile storage
directly addressable by the CPU, such as QSPI NOR flash which can
be found on many RISC-V platforms. This makes way for significant
optimization of RAM footprint. The XIP kernel is not compressed
since it has to run directly from flash, so it will occupy more
space on the non-volatile storage. The physical flash address used
to link the kernel object files and for storing it has to be known
at compile time and is represented by a Kconfig option.

XIP on RISC-V will for the time being only work on MMU-enabled
kernels.

Signed-off-by: Vitaly Wool <vitaly.wool@konsulko.com>
[Alex: Rebase on top of "Move kernel mapping outside the linear mapping" ]
Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
[Palmer: disable XIP for allyesconfig]
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2021-04-26 08:31:28 -07:00
..
cacheflush.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
context.c RISC-V: Implement ASID allocator 2021-02-18 23:18:06 -08:00
extable.c riscv: abstract out CSR names for supervisor vs machine mode 2019-11-05 09:20:42 -08:00
fault.c riscv: Move kernel mapping outside of linear mapping 2021-04-26 08:25:04 -07:00
hugetlbpage.c hugetlbfs: remove hugetlb_add_hstate() warning for existing hstate 2020-06-03 20:09:46 -07:00
init.c RISC-V: enable XIP 2021-04-26 08:31:28 -07:00
kasan_init.c riscv: add __init section marker to some functions 2021-04-26 08:25:07 -07:00
Makefile riscv: Fixup patch_text panic in ftrace 2021-01-14 15:09:04 -08:00
pageattr.c RISC-V Patches for the 5.11 Merge Window, Part 1 2020-12-18 10:43:07 -08:00
physaddr.c riscv: Move kernel mapping outside of linear mapping 2021-04-26 08:25:04 -07:00
ptdump.c riscv: add __init section marker to some functions 2021-04-26 08:25:07 -07:00
tlbflush.c RISC-V: Issue a tlb page flush if possible 2019-10-29 11:32:18 -07:00