Re: Setting nx bit in virtual CPU

[Avi Kivity <avi@redhat.com>]

On 04/07/2010 11:38 PM, Richard Simpson wrote:
> On 07/04/10 13:23, Avi Kivity wrote:
>    
>> On 04/07/2010 03:10 PM, Richard Simpson wrote:
>>      
>>> On 07/04/10 06:39, Avi Kivity wrote:
>>>
>>>        
>>>> On 04/07/2010 01:31 AM, Richard Simpson wrote:
>>>>
>>>>          
>>>>>
>>>>>            
>>>>>> 2.6.27 should be plenty fine for nx.  Really the important bit is that
>>>>>> the host kernel has nx enabled.  Can you check if that is so?
>>>>>>              
>>>> The attached script should verify it.
>>>>          
>>> IOError: [Errno 2] No such file or directory: '/dev/msr0'
>>>        
>> Run as root, please.  And check first that you have a file named
>> /dev/cpu/0/msr.
>>      
> Doh!
>
> gordon Code # ./check-nx
> nx: enabled
> gordon Code #
>
> OK, seems to be enabled just fine.  Any other ideas?  I am beginning to
> get that horrible feeling that there isn't a real problem and it is just
> me being dumb!
>    

I really hope so, because I am out of ideas... :)

Can you verify check-nx returns disabled on the guest?
Does /proc/cpuinfo show nx in the guest?

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.