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| author | Heiko Carstens <hca@linux.ibm.com> | 2023-04-14 14:30:44 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2023-04-20 11:36:29 +0200 |
| commit | 0490d6d7ba0a479fdd805da54ae25220ce5b514d (patch) | |
| tree | ea909a411bcdc09f10a4070b3a0d1a9d15f37907 /arch/s390/include | |
| parent | 17c51b1ba9c2d4b497349ac1622aafe67be16103 (diff) | |
| download | linux-stable-0490d6d7ba0a479fdd805da54ae25220ce5b514d.tar.gz linux-stable-0490d6d7ba0a479fdd805da54ae25220ce5b514d.tar.bz2 linux-stable-0490d6d7ba0a479fdd805da54ae25220ce5b514d.zip | |
s390/mm: enable ARCH_HAS_SET_DIRECT_MAP
Implement the set_direct_map_*() API, which allows to invalidate and set
default permissions to pages within the direct mapping.
Note that kernel_page_present(), which is also supposed to be part of this
API, is intentionally not implemented. The reason for this is that
kernel_page_present() is only used (and currently only makes sense) for
suspend/resume, which isn't supported on s390.
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/set_memory.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/s390/include/asm/set_memory.h b/arch/s390/include/asm/set_memory.h index ec3f44c602eb..7a3eefd7a242 100644 --- a/arch/s390/include/asm/set_memory.h +++ b/arch/s390/include/asm/set_memory.h @@ -12,6 +12,8 @@ enum { _SET_MEMORY_NX_BIT, _SET_MEMORY_X_BIT, _SET_MEMORY_4K_BIT, + _SET_MEMORY_INV_BIT, + _SET_MEMORY_DEF_BIT, }; #define SET_MEMORY_RO BIT(_SET_MEMORY_RO_BIT) @@ -19,6 +21,8 @@ enum { #define SET_MEMORY_NX BIT(_SET_MEMORY_NX_BIT) #define SET_MEMORY_X BIT(_SET_MEMORY_X_BIT) #define SET_MEMORY_4K BIT(_SET_MEMORY_4K_BIT) +#define SET_MEMORY_INV BIT(_SET_MEMORY_INV_BIT) +#define SET_MEMORY_DEF BIT(_SET_MEMORY_DEF_BIT) int __set_memory(unsigned long addr, int numpages, unsigned long flags); @@ -58,4 +62,7 @@ static inline int set_memory_4k(unsigned long addr, int numpages) return __set_memory(addr, numpages, SET_MEMORY_4K); } +int set_direct_map_invalid_noflush(struct page *page); +int set_direct_map_default_noflush(struct page *page); + #endif |