s390/mm: enable ARCH_HAS_SET_DIRECT_MAP

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Implement the set_direct_map_*() API, which allows to invalidate and set
default permissions to pages within the direct mapping.

Note that kernel_page_present(), which is also supposed to be part of this
API, is intentionally not implemented. The reason for this is that
kernel_page_present() is only used (and currently only makes sense) for
suspend/resume, which isn't supported on s390.

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

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Heiko Carstens 2023-04-14 14:30:44 +02:00 • committed by Vasily Gorbik

parent 17c51b1ba9

commit 0490d6d7ba

3 changed files with 43 additions and 0 deletions

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1

arch/s390/Kconfig

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7

arch/s390/include/asm/set_memory.h

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35

arch/s390/mm/pageattr.c

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