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s390/bp: add missing BPENTER to program check handler 

When leaving interpretive execution because of a program check BPENTER
should be called like it is done on interrupt exit as well.

Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2023-02-28 13:57:47 +01:00 committed by Vasily Gorbik
parent eeac8ede17
commit fed626db8b
1 changed files with 1 additions and 0 deletions
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arch/s390/kernel/entry.S
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@ -355,6 +355,7 @@ ENTRY(pgm_check_handler)
#if IS_ENABLED(CONFIG_KVM)
# cleanup critical section for program checks in __sie64a
OUTSIDE %r9,.Lsie_gmap,.Lsie_done,1f
BPENTER __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
SIEEXIT
lghi %r10,_PIF_GUEST_FAULT
#endif