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s390/kasan: add support for mem= kernel parameter

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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>
This commit is contained in:
Vasily Gorbik 2018-09-26 13:46:26 +02:00 committed by Martin Schwidefsky
parent 12e55fa194
commit 78333d1f90
1 changed files with 3 additions and 0 deletions
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3
arch/s390/mm/kasan_init.c
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@ -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)) {