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authorJan Glauber <jang@linux.vnet.ibm.com>2011-03-15 17:08:22 +0100
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2011-03-15 17:08:23 +0100
commit305b1523250faf9675919def94906775992ce52d (patch)
tree2dcbe253cf463eca3c0dfcc9ee8ac7b97cfa5021 /arch/s390/include
parentd54cddb620fa493968111f479029dcd910fcb921 (diff)
downloadop-kernel-dev-305b1523250faf9675919def94906775992ce52d.zip
op-kernel-dev-305b1523250faf9675919def94906775992ce52d.tar.gz
[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.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/s390/include/asm/cacheflush.h b/arch/s390/include/asm/cacheflush.h
index 7e1f776..43a5c78 100644
--- a/arch/s390/include/asm/cacheflush.h
+++ b/arch/s390/include/asm/cacheflush.h
@@ -8,4 +8,8 @@
void kernel_map_pages(struct page *page, int numpages, int enable);
#endif
+int set_memory_ro(unsigned long addr, int numpages);
+int set_memory_rw(unsigned long addr, int numpages);
+int set_memory_nx(unsigned long addr, int numpages);
+
#endif /* _S390_CACHEFLUSH_H */
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