Commit b2658540 authored by Alexander Gordeev's avatar Alexander Gordeev Committed by Heiko Carstens
Browse files

s390/pgtable: add REGION3_KERNEL_EXEC protection 



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: default avatarHeiko Carstens <hca@linux.ibm.com>
Signed-off-by: default avatarAlexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
parent bf2b4af2

arch/s390/include/asm/pgtable.h

+6 −0
Original line number Diff line number Diff line
@@ -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)

{