From 5dff03813f46f267bc1ecb334901e916346692ff Mon Sep 17 00:00:00 2001 From: Vasily Gorbik Date: Sun, 19 Nov 2017 11:54:14 +0100 Subject: 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 Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky --- lib/Kconfig.kasan | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'lib') 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 -- cgit