s390/boot: Allow KASAN mapping to fallback to small pages

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For KASAN shadow mappings, switch from physmem_alloc_or_die() to
physmem_alloc() and return INVALID_PHYS_ADDR on allocation failure. This
allows gracefully falling back from large pages to smaller pages (1MB
or 4KB) if the allocation of 2GB size/aligned pages cannot be fulfilled.

Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

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Vasily Gorbik 2024-12-10 11:18:32 +01:00 • committed by Alexander Gordeev

parent aeb4358a52

commit 490a5e99ea

1 changed files with 7 additions and 3 deletions

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arch/s390/boot/vmem.c

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