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

[lei yang <yanglei.fage@xxxxxxxxx>]

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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