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From: Thomas Huth <thuth@redhat.com>
To: qemu-devel@nongnu.org, Peter Maydell <peter.maydell@linaro.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>,
	qemu-s390x@nongnu.org, Cornelia Huck <cohuck@redhat.com>,
	Marc Hartmayer <mhartmay@linux.ibm.com>,
	Janosch Frank <frankja@linux.ibm.com>
Subject: [PULL 14/16] pc-bios: s390x: Go into disabled wait when encountering a PGM exception
Date: Tue,  6 Oct 2020 20:31:20 +0200	[thread overview]
Message-ID: <20201006183122.155609-15-thuth@redhat.com> (raw)
In-Reply-To: <20201006183122.155609-1-thuth@redhat.com>

From: Janosch Frank <frankja@linux.ibm.com>

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>
---
 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)
-- 
2.18.2



  parent reply	other threads:[~2020-10-06 18:40 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-06 18:31 [PULL 00/16] s390-ccw bios update Thomas Huth
2020-10-06 18:31 ` [PULL 01/16] pc-bios/s390-ccw/Makefile: Compile with -std=gnu99, -fwrapv and -fno-common Thomas Huth
2020-10-06 18:31 ` [PULL 02/16] pc-bios/s390-ccw: Move ipl-related code from main() into a separate function Thomas Huth
2020-10-06 18:31 ` [PULL 03/16] pc-bios/s390-ccw: Introduce ENODEV define and remove guards of others Thomas Huth
2020-10-06 18:31 ` [PULL 04/16] pc-bios/s390-ccw: Move the inner logic of find_subch() to a separate function Thomas Huth
2020-10-06 18:31 ` [PULL 05/16] pc-bios/s390-ccw: Do not bail out early if not finding a SCSI disk Thomas Huth
2020-10-06 18:31 ` [PULL 06/16] pc-bios/s390-ccw: Scan through all devices if no boot device specified Thomas Huth
2020-10-06 18:31 ` [PULL 07/16] pc-bios/s390-ccw: Allow booting in case the first virtio-blk disk is bad Thomas Huth
2020-10-06 18:31 ` [PULL 08/16] pc-bios/s390-ccw/main: Remove superfluous call to enable_subchannel() Thomas Huth
2020-10-06 18:31 ` [PULL 09/16] pc-bios/s390-ccw: fix off-by-one error Thomas Huth
2020-10-06 18:31 ` [PULL 10/16] pc-bios/s390-ccw: break loop if a null block number is reached Thomas Huth
2020-10-06 18:31 ` [PULL 11/16] pc-bios: s390x: Fix bootmap.c zipl component entry data handling Thomas Huth
2020-10-06 18:31 ` [PULL 12/16] pc-bios: s390x: Save PSW rework Thomas Huth
2020-10-06 18:31 ` [PULL 13/16] pc-bios: s390x: Use reset PSW if avaliable Thomas Huth
2020-10-06 18:31 ` Thomas Huth [this message]
2020-10-06 18:31 ` [PULL 15/16] pc-bios/s390: Update the s390-ccw bios binaries Thomas Huth
2020-10-06 18:31 ` [PULL 16/16] tests/qtest/cdrom: Add more s390x-related boot tests Thomas Huth
2020-10-07  5:59 ` [PULL 00/16] s390-ccw bios update Christian Borntraeger
2020-10-08 10:32 ` Peter Maydell

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