s390/entry: compare gmap asce to determine guest/host fault

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With the current implementation, there are some cornercases where
a host fault would be treated as a guest fault, for example
when the sie instruction causes a program check. Therefore store
the gmap asce in ptregs, and use that to compare the primary asce
from the fault instead of matching instruction addresses.

Suggested-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

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Sven Schnelle 2024-03-13 09:51:22 +01:00 • committed by Heiko Carstens

parent 29e5bc0f02

commit 64c3431808

3 changed files with 18 additions and 19 deletions

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2

arch/s390/include/asm/ptrace.h

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31

arch/s390/kernel/entry.S

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4

arch/s390/mm/fault.c

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