This is a note to let you know that I've just added the patch titled
x86, cpu: Fix regression in AMD errata checking code
to the 2.6.32-longterm tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/longterm/longterm-queue-2.6.32.git;a=summary
The filename of the patch is:
x86-cpu-fix-regression-in-amd-errata-checking-code.patch
and it can be found in the queue-2.6.32 subdirectory.
If you, or anyone else, feels it should not be added to the 2.6.32 longterm
tree,
please let <[email protected]> know about it.
>From 07a7795ca2e6e66d00b184efb46bd0e23d90d3fe Mon Sep 17 00:00:00 2001
From: Hans Rosenfeld <[email protected]>
Date: Wed, 18 Aug 2010 16:19:50 +0200
Subject: x86, cpu: Fix regression in AMD errata checking code
From: Hans Rosenfeld <[email protected]>
commit 07a7795ca2e6e66d00b184efb46bd0e23d90d3fe upstream.
A bug in the family-model-stepping matching code caused the presence of
errata to go undetected when OSVW was not used. This causes hangs on
some K8 systems because the E400 workaround is not enabled.
Signed-off-by: Hans Rosenfeld <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: H. Peter Anvin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/x86/kernel/cpu/amd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -689,7 +689,7 @@ bool cpu_has_amd_erratum(const int *erra
}
/* OSVW unavailable or ID unknown, match family-model-stepping range */
- ms = (cpu->x86_model << 8) | cpu->x86_mask;
+ ms = (cpu->x86_model << 4) | cpu->x86_mask;
while ((range = *erratum++))
if ((cpu->x86 == AMD_MODEL_RANGE_FAMILY(range)) &&
(ms >= AMD_MODEL_RANGE_START(range)) &&
Patches currently in longterm-queue-2.6.32 which might be from
[email protected] are
/home/gregkh/linux/longterm/longterm-queue-2.6.32/queue-2.6.32/x86-cpu-fix-regression-in-amd-errata-checking-code.patch
/home/gregkh/linux/longterm/longterm-queue-2.6.32/queue-2.6.32/x86-cpu-amd-errata-checking-framework.patch
/home/gregkh/linux/longterm/longterm-queue-2.6.32/queue-2.6.32/x86-cpu-clean-up-amd-erratum-400-workaround.patch
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