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LoongArch: Support access filter to /dev/mem interface
authorHuacai Chen <chenhuacai@loongson.cn>
Wed, 12 Oct 2022 08:36:14 +0000 (16:36 +0800)
committerHuacai Chen <chenhuacai@loongson.cn>
Wed, 12 Oct 2022 08:36:14 +0000 (16:36 +0800)
commit235d074fdc9a69e3720b8bb6efeb7c6d30c12d8e
tree2ad87b94ebfa30791c7c9cf2ccf4eb41a263ceebtree | snapshot
parentb61a40afca164a9bd066f749beff3bf209c5e209commit | diff
LoongArch: Support access filter to /dev/mem interface

Accidental access to /dev/mem is obviously disastrous, but specific
access can be used by people debugging the kernel. So select GENERIC_
LIB_DEVMEM_IS_ALLOWED, as well as define ARCH_HAS_VALID_PHYS_ADDR_RANGE
and related helpers, to support access filter to /dev/mem interface.

Signed-off-by: Weihao Li <liweihao@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
arch/loongarch/Kconfig diff | blob | history
arch/loongarch/include/asm/io.h diff | blob | history
arch/loongarch/mm/mmap.c diff | blob | history
Domain: System / Kernel;