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[PATCH v4 4/4] pc-bios: s390x: Go into disabled wait when encountering a
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From: |
Janosch Frank |
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Subject: |
[PATCH v4 4/4] pc-bios: s390x: Go into disabled wait when encountering a PGM exception |
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Date: |
Tue, 6 Oct 2020 05:42:49 -0400 |
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>
---
pc-bios/s390-ccw/start.S | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/pc-bios/s390-ccw/start.S b/pc-bios/s390-ccw/start.S
index ce519300a1..4d5ad21653 100644
--- a/pc-bios/s390-ccw/start.S
+++ b/pc-bios/s390-ccw/start.S
@@ -34,7 +34,10 @@ remainder:
larl %r2,memsetxc
ex %r3,0(%r2)
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:
xc 0(1,%r1),0(%r1)
--
2.25.1