linux/arch/riscv/mm
Nick Hu 8ad8b72721
riscv: Add KASAN support
This patch ports the feature Kernel Address SANitizer (KASAN).

Note: The start address of shadow memory is at the beginning of kernel
space, which is 2^64 - (2^39 / 2) in SV39. The size of the kernel space is
2^38 bytes so the size of shadow memory should be 2^38 / 8. Thus, the
shadow memory would not overlap with the fixmap area.

There are currently two limitations in this port,

1. RV64 only: KASAN need large address space for extra shadow memory
region.

2. KASAN can't debug the modules since the modules are allocated in VMALLOC
area. We mapped the shadow memory, which corresponding to VMALLOC area, to
the kasan_early_shadow_page because we don't have enough physical space for
all the shadow memory corresponding to VMALLOC area.

Signed-off-by: Nick Hu <nickhu@andestech.com>
Reported-by: Greentime Hu <green.hu@gmail.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-01-22 13:09:58 -08:00
..
cacheflush.c riscv: export flush_icache_all to modules 2019-12-27 21:51:01 -08:00
context.c riscv: add nommu support 2019-11-17 15:17:39 -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: abstract out CSR names for supervisor vs machine mode 2019-11-05 09:20:42 -08:00
hugetlbpage.c riscv: Introduce huge page support for 32/64bit kernel 2019-07-03 15:23:38 -07:00
init.c riscv: mm: use __pa_symbol for kernel symbols 2020-01-03 00:33:34 -08:00
kasan_init.c riscv: Add KASAN support 2020-01-22 13:09:58 -08:00
Makefile riscv: Add KASAN support 2020-01-22 13:09:58 -08:00
tlbflush.c RISC-V: Issue a tlb page flush if possible 2019-10-29 11:32:18 -07:00