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| author | Heiko Carstens <hca@linux.ibm.com> | 2020-09-09 18:10:29 +0300 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2020-09-14 12:38:35 +0300 |
| commit | 08c8e685c7c9223f9c4ad6365e02bebd3f106480 (patch) | |
| tree | 0125da74f6c62816182837dfcae925c640fbc4a0 /arch/s390/include | |
| parent | 6bf9a639e76e1da8eb1ed29e037e900106e1dff4 (diff) | |
| download | linux-08c8e685c7c9223f9c4ad6365e02bebd3f106480.tar.xz | |
s390: add ARCH_HAS_DEBUG_WX support
Checks the whole kernel address space for W+X mappings. Note that
currently the first lowcore page unfortunately has to be mapped
W+X. Therefore this not reported as an insecure mapping.
For the very same reason the wording is also different to other
architectures if the test passes:
On s390 it is "no unexpected W+X pages found" instead of
"no W+X pages found".
Tested-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/ptdump.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/s390/include/asm/ptdump.h b/arch/s390/include/asm/ptdump.h new file mode 100644 index 000000000000..f960b2896606 --- /dev/null +++ b/arch/s390/include/asm/ptdump.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _ASM_S390_PTDUMP_H +#define _ASM_S390_PTDUMP_H + +void ptdump_check_wx(void); + +static inline void debug_checkwx(void) +{ + if (IS_ENABLED(CONFIG_DEBUG_WX)) + ptdump_check_wx(); +} + +#endif /* _ASM_S390_PTDUMP_H */ |