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pc-bios: s390x: Go into disabled wait when encountering a PGM exception 

Let's setup a PGM PSW, so we won't load 0s when a program exception
happens. Instead we'll load a disabled wait PSW.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20201006094249.50640-5-frankja@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Janosch Frank 2020-10-06 05:42:49 -04:00 committed by Thomas Huth
parent 42ab98e7d7
commit 25f5adea5a
1 changed files with 4 additions and 1 deletions
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5
pc-bios/s390-ccw/start.S
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@ -34,7 +34,10 @@ remainder:
larl %r2,memsetxc larl %r2,memsetxc
ex %r3,0(%r2) ex %r3,0(%r2)
done: done:
j main /* And call C */ /* set up a pgm exception disabled wait psw */
larl %r2, disabled_wait_psw
mvc 0x01d0(16), 0(%r2)
j main /* And call C */
memsetxc: memsetxc:
xc 0(1,%r1),0(%r1) xc 0(1,%r1),0(%r1)