From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Cc: linuxppc-dev@ozlabs.org
Subject: [PATCH] powerpc: Fix 460EX/460GT machine check handling
Date: Wed, 12 Nov 2008 13:02:43 +1100 [thread overview]
Message-ID: <20081112020409.4FFBCDDDDB@ozlabs.org> (raw)
Those cores use the 440A type machine check (ie, they have
MCSRR0/MCSRR1). They thus need to call the appropriate fixup
function to hook the right variant of the exception.
Without this, all machine checks become fatal due to loss
of context when entering the exception handler.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
arch/powerpc/kernel/cpu_setup_44x.S | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- linux-work.orig/arch/powerpc/kernel/cpu_setup_44x.S 2008-11-12 12:51:24.000000000 +1100
+++ linux-work/arch/powerpc/kernel/cpu_setup_44x.S 2008-11-12 13:01:03.000000000 +1100
@@ -34,7 +34,12 @@ _GLOBAL(__setup_cpu_440grx)
blr
_GLOBAL(__setup_cpu_460ex)
_GLOBAL(__setup_cpu_460gt)
- b __init_fpu_44x
+ mflr r4
+ bl __init_fpu_44x
+ bl __fixup_440A_mcheck
+ mtlr r4
+ blr
+
_GLOBAL(__setup_cpu_440gx)
_GLOBAL(__setup_cpu_440spe)
b __fixup_440A_mcheck
next reply other threads:[~2008-11-12 2:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-12 2:02 Benjamin Herrenschmidt [this message]
2008-11-12 11:27 ` [PATCH] powerpc: Fix 460EX/460GT machine check handling Josh Boyer
2008-11-12 11:50 ` Benjamin Herrenschmidt
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