From 305b1523250faf9675919def94906775992ce52d Mon Sep 17 00:00:00 2001 From: Jan Glauber Date: Tue, 15 Mar 2011 17:08:22 +0100 Subject: [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 Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/cacheflush.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/s390/include') diff --git a/arch/s390/include/asm/cacheflush.h b/arch/s390/include/asm/cacheflush.h index 7e1f7762062..43a5c78046d 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 */ -- cgit v1.2.3-70-g09d2