[PATCH v3 5/5] pc-bios: s390x: Go into disabled wait when encountering a PGM exception

[Janosch Frank]

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 <fran...@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntrae...@de.ibm.com>
---
 pc-bios/s390-ccw/start.S | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pc-bios/s390-ccw/start.S b/pc-bios/s390-ccw/start.S
index 939aac3a7c..775b45baeb 100644
--- a/pc-bios/s390-ccw/start.S
+++ b/pc-bios/s390-ccw/start.S
@@ -44,6 +44,9 @@ done:
         larl  %r2, external_new_psw
         stg   %r1, 8(%r2)
         mvc   0x1b0(16),0(%r2)
+        /* set up a pgm exception disabled wait psw */
+        larl  %r2, disabled_wait_psw
+        mvc   0x01d0(16), 0(%r2)
         j      main            /* And call C */
 
 memsetxc:
-- 
2.25.1