Max Filippov a8f0c31fa8 xtensa: noMMU: allow handling protection faults ...

Many xtensa CPU cores without full MMU still have memory protection
features capable of raising exceptions for invalid instruction
fetches/data access. Allow handling such exceptions. This improves
behavior of processes that pass invalid memory pointers to syscalls in
noMMU configs: in case of exception the kernel instead of killing the
process is now able to return -EINVAL from a syscall.

Introduce CONFIG_PFAULT that controls whether protection fault code is
enabled and register handlers for common memory protection exceptions
when it is enabled.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

2022-05-01 19:51:21 -07:00

..

cache.c

xtensa: simplify coherent_kvaddr logic

2021-04-04 15:39:03 -07:00

fault.c

xtensa: noMMU: allow handling protection faults

2022-05-01 19:51:21 -07:00

highmem.c

xtensa/mm/highmem: Make generic kmap_atomic() work correctly

2020-11-16 21:19:24 +01:00

init.c

mm: move mem_init_print_info() into mm_init()

2021-04-30 11:20:42 -07:00

ioremap.c

mm: reorder includes after introduction of linux/pgtable.h

2020-06-09 09:39:13 -07:00

kasan_init.c

mm: pgtable: add shortcuts for accessing kernel PMD and PTE

2020-06-09 09:39:13 -07:00

Makefile

xtensa: noMMU: allow handling protection faults

2022-05-01 19:51:21 -07:00

misc.S

xtensa: simplify coherent_kvaddr logic

2021-04-04 15:39:03 -07:00

mmu.c

xtensa: move asid_cache from fault.c to mmu.c

2022-05-01 19:51:20 -07:00

tlb.c

xtensa: define update_mmu_tlb function

2022-03-22 09:45:09 -07:00