Re: [Xen-users] Is there a method to check my machine support VT-d without checking bios

["Nick Couchman" <Nick.Couchman@xxxxxxxxx>]

I don't know - if you're running Xen you need to use "xm dmesg" and not just 
"dmesg" and look for I/O virtualisation.

-Nick

>>> On 2013/01/22 at 08:43, lei yang <yanglei.fage@xxxxxxxxx> wrote: 
> On Tue, Jan 22, 2013 at 10:26 PM, Nick Couchman <Nick.Couchman@xxxxxxxxx> 
> wrote:
>>>>> On 2013/01/21 at 19:45, lei yang <yanglei.fage@xxxxxxxxx> wrote:
>>> Hi experts,
>>>
>>> Is there a method to check my machine support VT-d without checking
>>> bios, I want use a script or tool to get this
>>>
>>>
>>> Lei
>>
>> Yes...if you look at the "xm dmesg" output, you should see one of the 
> following lines:
>>
>> (XEN) I/O virtualisation enabled
>>
>> or
>>
>> (XEN) I/O virtualisation disabled
>>
>>
>> If you see the "disabled" version of the message, check your BIOS to see if 
> it just needs to be turned on.  Also, if you see disabled, grab the model 
> number of your CPU and check the CPU specs to see if the CPU support I/O 
> Virtualization.  I'm not sure about AMD, but Intel's site has very 
> easy-to-read 
> specs for the CPUs that tell you about the various features they support.
>>
> 
> 
> Does blow can prove it supports vt-d which mentioned in
> http://www.linux-kvm.org/page/How_to_assign_devices_with_VT-d_in_KVM
> 
>         dmesg | grep -e DMAR -e IOMMU
> 
>      ...
>      DMAR:DRHD base: 0x000000feb03000 flags: 0x0
>      IOMMU feb03000: ver 1:0 cap c9008020e30260 ecap 1000
> 
> 
> I'm not sure what output for no-vt-d intel board
> 
> 
> Lei
> 
> 
> 
>> -Nick
>>
>>
>>
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