From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Wed, 12 Sep 2018 06:54:59 +0000 (+0200)
Subject: s390: add initial 64-bit restart PSW
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8e5a7627b5881ee0551b7ee02d41c2a983358842;p=linux.git

s390: add initial 64-bit restart PSW

To be able to start a kernel image loaded into memory with a
PSW restart, place a 64-bit restart PSW at 0x1a0 in absolute
lowcore.

Suggested-by: Dominik Klein <dominik.klein@linux.ibm.com>
Tested-by: Dominik Klein <dominik.klein@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/arch/s390/boot/head.S b/arch/s390/boot/head.S
index f721913b73f10..f1cdca8ad3cc2 100644
--- a/arch/s390/boot/head.S
+++ b/arch/s390/boot/head.S
@@ -60,6 +60,9 @@ __HEAD
 	.long	0x02000690,0x60000050
 	.long	0x020006e0,0x20000050
 
+	.org	0x1a0
+	.quad	0,iplstart
+
 	.org	0x200
 
 #