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s390/pgtable: add REGION3_KERNEL_EXEC protection

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Similar to existing PAGE_KERNEL_EXEC and SEGMENT_KERNEL_EXEC
memory protection add REGION3_KERNEL_EXEC attribute that
could be set on PUD pgtable entries.

Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Alexander Gordeev 2022-12-02 19:07:07 +01:00 committed by Heiko Carstens
parent bf2b4af2ed
commit b265854060
1 changed files with 6 additions and 0 deletions
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6
arch/s390/include/asm/pgtable.h
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@ -477,6 +477,12 @@ static inline int is_module_addr(void *addr)
_REGION3_ENTRY_YOUNG | \
_REGION_ENTRY_PROTECT | \
_REGION_ENTRY_NOEXEC)
#define REGION3_KERNEL_EXEC __pgprot(_REGION_ENTRY_TYPE_R3 | \
_REGION3_ENTRY_LARGE | \
_REGION3_ENTRY_READ | \
_REGION3_ENTRY_WRITE | \
_REGION3_ENTRY_YOUNG | \
_REGION3_ENTRY_DIRTY)
static inline bool mm_p4d_folded(struct mm_struct *mm)
{