[Xen-devel] [PATCH] x86: Small Fix for cmci threashold set value

["Ke, Liping" <liping.ke@xxxxxxxxx>]

Hi, Keir

 

Below is a small patch for fixing CMCI Threshold set problem. When generating

new threshold value, we must firstly clean old value before or the new set value.

 

Thanks& Regards,

Criping

 

 

Small fix for CMCI Threshold set problem. When generating new threshold value,

we must firstly clean old value before or the new set value since the new

value might be different with the old (BIOS might pre-set some threshold).

 

Signed-off-by: Liping Ke<liping.ke@xxxxxxxxx>

Signed-off-by: Ying Huang<ying.huang@xxxxxxxxx>

 

diff -r 02e9bafc1f62 xen/arch/x86/cpu/mcheck/mce_intel.c

--- a/xen/arch/x86/cpu/mcheck/mce_intel.c  Tue Mar 30 13:29:53 2010 +0800

+++ b/xen/arch/x86/cpu/mcheck/mce_intel.c        Tue Mar 30 13:41:03 2010 +0800

@@ -824,6 +824,8 @@

         clear_bit(i, __get_cpu_var(mce_banks_owned));

         goto out;

     }

+

+    val &= ~CMCI_THRESHOLD_MASK;

     wrmsrl(msr, val | CMCI_EN | CMCI_THRESHOLD);

     rdmsrl(msr, val);

 

Attachment: cmci_fix.patch
Description: cmci_fix.patch

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