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| 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 /lib | |
| parent | s390/kasan: free early identity mapping structures (diff) | |
| download | linux-dev-5dff03813f46f267bc1ecb334901e916346692ff.tar.xz linux-dev-5dff03813f46f267bc1ecb334901e916346692ff.zip | |
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 'lib')
| -rw-r--r-- | lib/Kconfig.kasan | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan index befb127507c0..d0bad1bd9a2b 100644 --- a/lib/Kconfig.kasan +++ b/lib/Kconfig.kasan @@ -57,6 +57,15 @@ config KASAN_INLINE endchoice +config KASAN_S390_4_LEVEL_PAGING + bool "KASan: use 4-level paging" + depends on KASAN && S390 + help + Compiling the kernel with KASan disables automatic 3-level vs + 4-level paging selection. 3-level paging is used by default (up + to 3TB of RAM with KASan enabled). This options allows to force + 4-level paging instead. + config TEST_KASAN tristate "Module for testing kasan for bug detection" depends on m && KASAN |