s390/kasan: add support for mem= kernel parameter
Handle mem= kernel parameter in kasan to limit physical memory.
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>
diff --git a/arch/s390/mm/kasan_init.c b/arch/s390/mm/kasan_init.c
index 5b25324..5598214 100644
--- a/arch/s390/mm/kasan_init.c
+++ b/arch/s390/mm/kasan_init.c
@@ -268,6 +268,9 @@ void __init kasan_early_init(void)
memsize = get_mem_detect_end();
if (!memsize)
kasan_early_panic("cannot detect physical memory size\n");
+ /* respect mem= cmdline parameter */
+ if (memory_end_set && memsize > memory_end)
+ memsize = memory_end;
memsize = min(memsize, KASAN_SHADOW_START);
if (IS_ENABLED(CONFIG_KASAN_S390_4_LEVEL_PAGING)) {