s390/entry: rework entering DAT-on mode on CPU restart

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Instead of enforcing PSW_MASK_DAT bit on previously stored
in lowcore restart_psw.mask use the PSW_KERNEL_BITS mask
(which contains PSW_MASK_DAT) directly.

As result, the PSW mask stored in lowcore is only used to
enter the CPU restart routine, while PSW_KERNEL_BITS is
used to enter the kernel code - similarily to commit
64ea2977add2 ("s390/mm: start kernel with DAT enabled").

Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

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This commit is contained in:

Alexander Gordeev 2023-04-18 17:40:37 +02:00

parent b492425c70

commit edbe289898

1 changed files with 8 additions and 3 deletions

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arch/s390/kernel/entry.S

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