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s390/boot: account Real Memory Copy and Lowcore areas

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

Fixes: 4df29d2b90 ("s390/smp: rework absolute lowcore access")
Fixes: 2f0e8aae26 ("s390/mm: rework memcpy_real() to avoid DAT-off mode")
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Alexander Gordeev 2023-08-04 15:24:28 +02:00 • committed by Heiko Carstens
parent a984f27ec2
commit 09cd4ffafb
1 changed files with 2 additions and 1 deletions
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3
arch/s390/boot/startup.c
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@ -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;