linux

iv/linux

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Andrew Bresticker c657b70e80 riscv: Make VM_WRITE imply VM_READ

commit 7ab72c597356be1e7f0f3d856e54ce78527f43c8 upstream.

RISC-V does not presently have write-only mappings as that PTE bit pattern
is considered reserved in the privileged spec, so allow handling of read
faults in VMAs that have VM_WRITE without VM_READ in order to be consistent
with other architectures that have similar limitations.

Fixes: 2139619bcad7 ("riscv: mmap with PROT_WRITE but no PROT_READ is invalid")
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Andrew Bresticker <abrestic@rivosinc.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220915193702.2201018-2-abrestic@rivosinc.com/
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2022-10-26 12:34:22 +02:00

cacheflush.c

riscv: Flush current cpu icache before other cpus

2021-10-04 18:24:15 -07:00

context.c

riscv: add ASID-based tlbflushing methods

2021-06-30 20:55:39 -07:00

extable.c

riscv: abstract out CSR names for supervisor vs machine mode

2019-11-05 09:20:42 -08:00

fault.c

riscv: Make VM_WRITE imply VM_READ