s390/head: initialize all new psws

Initialize all new psws with disabled wait psws, except for the restart new
psw. This way every unexpected exception, svc, machine check, or interrupt
is handled properly.

Reviewed-by: Vasily Gorbik <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>

Author: hcahca

arch/s390/boot/head.S

@@ -64,14 +64,22 @@ __HEAD
 	.long	0x02000690,0x60000050
 	.long	0x020006e0,0x20000050
 
-	.org	__LC_RST_NEW_PSW		# 0x1a0
+# The restart psw points to ipl_entry, which allows to load a kernel image
+# into memory and starting it by a psw restart on any cpu.
+# All other default psw new locations contain a disabled wait psw where the
+# address indicates which psw was loaded.
+	.org	__LC_RST_NEW_PSW
 	.quad	0,IPL_START
-	.org	__LC_EXT_NEW_PSW		# 0x1b0
-	.quad	0x0002000180000000,0x1b0	# disabled wait
-	.org	__LC_PGM_NEW_PSW		# 0x1d0
-	.quad	0x0002000180000000,0x1d0	# disabled wait
-	.org	__LC_IO_NEW_PSW			# 0x1f0
-	.quad	0x0002000180000000,0x1f0	# disabled wait
+	.org	__LC_EXT_NEW_PSW
+	.quad	0x0002000180000000,__LC_EXT_NEW_PSW
+	.org	__LC_SVC_NEW_PSW
+	.quad	0x0002000180000000,__LC_SVC_NEW_PSW
+	.org	__LC_PGM_NEW_PSW
+	.quad	0x0002000180000000,__LC_PGM_NEW_PSW
+	.org	__LC_MCK_NEW_PSW
+	.quad	0x0002000180000000,__LC_MCK_NEW_PSW
+	.org	__LC_IO_NEW_PSW
+	.quad	0x0002000180000000,__LC_IO_NEW_PSW
 
 	.org	IPL_START
 ipl_start: