Commit 09cd4ffa authored by Alexander Gordeev's avatar Alexander Gordeev Committed by Heiko Carstens
Browse files

s390/boot: account Real Memory Copy and Lowcore areas 



Real Memory Copy and (absolute) Lowcore areas are
not accounted when virtual memory layout is set up.

Fixes: 4df29d2b ("s390/smp: rework absolute lowcore access")
Fixes: 2f0e8aae ("s390/mm: rework memcpy_real() to avoid DAT-off mode")
Acked-by: default avatarHeiko Carstens <hca@linux.ibm.com>
Signed-off-by: default avatarAlexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
parent a984f27e

arch/s390/boot/startup.c

+2 −1
Original line number Diff line number Diff line
@@ -185,7 +185,8 @@ static unsigned long setup_kernel_memory_layout(void) 
	vmemmap_size = SECTION_ALIGN_UP(pages) * sizeof(struct page);



	/* choose kernel address space layout: 4 or 3 levels. */

	vsize = round_up(ident_map_size, _REGION3_SIZE) + vmemmap_size + MODULES_LEN;

	vsize = round_up(ident_map_size, _REGION3_SIZE) + vmemmap_size +

		MODULES_LEN + MEMCPY_REAL_SIZE + ABS_LOWCORE_MAP_SIZE;

	vsize = size_add(vsize, vmalloc_size);

	if (IS_ENABLED(CONFIG_KASAN) || (vsize > _REGION2_SIZE)) {

		asce_limit = _REGION1_SIZE;