s390/mm: Allow large pages only for aligned physical addresses

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Do not allow creation of large pages against physical addresses,
which itself are not aligned on the correct boundary. Failure to
do so might lead to referencing wrong memory as result of the way
DAT works.

Fixes: c98d2ecae0 ("s390/mm: Uncouple physical vs virtual address spaces")
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

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Alexander Gordeev 2024-06-07 14:19:48 +02:00 • committed by Vasily Gorbik

parent b01b8151ef

commit d8073dc6bc

1 changed files with 8 additions and 2 deletions

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arch/s390/boot/vmem.c

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