s390/traps,mm: add conditional trap handlers

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Add conditional trap handlers similar to conditional system calls
(COND_SYSCALL), to reduce the number of ifdefs.

Trap handlers which may or may not exist depending on config options
are supposed to have a COND_TRAP entry, which redirects to
default_trap_handler() for non-existent trap handlers during link
time.

This allows to get rid of the secure execution trap handlers for the
!PGSTE case.

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

...

This commit is contained in:

Heiko Carstens 2021-04-09 10:34:43 +02:00

parent 61311e3289

commit 17a363dcd2

3 changed files with 12 additions and 18 deletions

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1

arch/s390/kernel/entry.h

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11

arch/s390/kernel/traps.c

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18

arch/s390/mm/fault.c

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