From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: linux-kernel@vger.kernel.org, heiko.carstens@de.ibm.com
Subject: [S390] Misaligned wait PSW at memory detection.
Date: Mon, 4 Dec 2006 15:54:33 +0100 [thread overview]
Message-ID: <20061204145433.GT32059@skybase> (raw)
From: Heiko Carstens <heiko.carstens@de.ibm.com>
[S390] Misaligned wait PSW at memory detection.
If the memory detection code would ever reach the point where it would
load the wait psw, it would generate a specification exception and the
system would crash at ipl time. This is because of a misaligned wait
psw. It needs to be on a double word boundary instead of a word
boundary.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
arch/s390/kernel/head31.S | 3 ++-
1 files changed, 2 insertions(+), 1 deletion(-)
diff -urpN linux-2.6/arch/s390/kernel/head31.S linux-2.6-patched/arch/s390/kernel/head31.S
--- linux-2.6/arch/s390/kernel/head31.S 2006-11-29 22:57:37.000000000 +0100
+++ linux-2.6-patched/arch/s390/kernel/head31.S 2006-12-04 14:50:51.000000000 +0100
@@ -131,10 +131,11 @@ startup_continue:
.long init_thread_union
.Lpmask:
.byte 0
-.align 8
+ .align 8
.Lpcext:.long 0x00080000,0x80000000
.Lcr:
.long 0x00 # place holder for cr0
+ .align 8
.Lwaitsclp:
.long 0x010a0000,0x80000000 + .Lsclph
.Lrcp:
reply other threads:[~2006-12-04 14:55 UTC|newest]
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