diff options
| author | Vasily Gorbik <gor@linux.ibm.com> | 2017-11-19 11:54:14 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-10-09 11:21:29 +0200 |
| commit | 5dff03813f46f267bc1ecb334901e916346692ff (patch) | |
| tree | e9bbcc7ed939aca9e7c180d7946e1f728bc7883c /arch/s390/include | |
| parent | 135ff163939294f5573927ca890699ed619c0031 (diff) | |
s390/kasan: add option for 4-level paging support
By default 3-level paging is used when the kernel is compiled with
kasan support. Add 4-level paging option to support systems with more
then 3TB of physical memory and to cover 4-level paging specific code
with kasan as well.
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/kasan.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/s390/include/asm/kasan.h b/arch/s390/include/asm/kasan.h index 8b9ae18430ad..70930fe5c496 100644 --- a/arch/s390/include/asm/kasan.h +++ b/arch/s390/include/asm/kasan.h @@ -7,8 +7,13 @@ #ifdef CONFIG_KASAN #define KASAN_SHADOW_SCALE_SHIFT 3 +#ifdef CONFIG_KASAN_S390_4_LEVEL_PAGING +#define KASAN_SHADOW_SIZE \ + (_AC(1, UL) << (_REGION1_SHIFT - KASAN_SHADOW_SCALE_SHIFT)) +#else #define KASAN_SHADOW_SIZE \ (_AC(1, UL) << (_REGION2_SHIFT - KASAN_SHADOW_SCALE_SHIFT)) +#endif #define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL) #define KASAN_SHADOW_START KASAN_SHADOW_OFFSET #define KASAN_SHADOW_END (KASAN_SHADOW_START + KASAN_SHADOW_SIZE) |