diff options
| author | Jan Glauber <jang@linux.vnet.ibm.com> | 2011-03-15 12:08:22 -0400 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2011-03-15 12:08:23 -0400 |
| commit | 305b1523250faf9675919def94906775992ce52d (patch) | |
| tree | 2dcbe253cf463eca3c0dfcc9ee8ac7b97cfa5021 /arch/s390/include | |
| parent | d54cddb620fa493968111f479029dcd910fcb921 (diff) | |
[S390] Write protect module text and RO data
Implement write protection for kernel modules text and read-only
data sections by implementing set_memory_[ro|rw] on s390.
Since s390 has no execute bit in the pte's NX is not supported.
set_memory_[ro|rw] will only work on normal pages and not on
large pages, so in case a large page should be modified bail
out with a warning.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/cacheflush.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/s390/include/asm/cacheflush.h b/arch/s390/include/asm/cacheflush.h index 7e1f77620624..43a5c78046db 100644 --- a/arch/s390/include/asm/cacheflush.h +++ b/arch/s390/include/asm/cacheflush.h | |||
| @@ -8,4 +8,8 @@ | |||
| 8 | void kernel_map_pages(struct page *page, int numpages, int enable); | 8 | void kernel_map_pages(struct page *page, int numpages, int enable); |
| 9 | #endif | 9 | #endif |
| 10 | 10 | ||
| 11 | int set_memory_ro(unsigned long addr, int numpages); | ||
| 12 | int set_memory_rw(unsigned long addr, int numpages); | ||
| 13 | int set_memory_nx(unsigned long addr, int numpages); | ||
| 14 | |||
| 11 | #endif /* _S390_CACHEFLUSH_H */ | 15 | #endif /* _S390_CACHEFLUSH_H */ |