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s390: move vmalloc option parsing to startup code

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Few other crucial memory setup options are already handled in
the startup code. Those values are needed by kaslr and kasan
implementations. "vmalloc" is the last piece required for future
improvements such as early decision on kernel page levels depth required
for actual memory setup, as well as vmalloc memory area access monitoring
in kasan.

Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Vasily Gorbik
2019-08-02 12:28:20 +02:00
parent f62f7dcbf0
commit 59793c5ab9
4 changed files with 9 additions and 11 deletions
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1
arch/s390/include/asm/pgtable.h
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@@ -86,6 +86,7 @@ extern unsigned long zero_page_mask;
*/
extern unsigned long VMALLOC_START;
extern unsigned long VMALLOC_END;
#define VMALLOC_DEFAULT_SIZE ((128UL << 30) - MODULES_LEN)
extern struct page *vmemmap;
#define VMEM_MAX_PHYS ((unsigned long) vmemmap)