Re: [Xen-devel] [Xen-users] [SUCCESS] Xen 4.2-unstable Changeset 25099: VGA Passthrough to Windows 8 Consumer Preview HVM domU

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Mon, Mar 26, 2012 at 11:00:51PM +0800, Teo En Ming (Zhang Enming) wrote:
> On 26/03/2012 22:15, Martin Wolf wrote:
>> Am 26.03.2012 14:40, schrieb Teo En Ming (Zhang Enming):
>>> On 26/03/2012 20:23, Pavel Mateja wrote:
>>>>> On 26/03/2012 17:15, Pavel Mateja wrote:
>>>>>>> Dear Xen users, developers and David Techer,
>>>>>>>
>>>>>>> I have just downloaded, compiled, and installed Xen 4.2-unstable
>>>>>>> Changeset *_25099_* with Xen VGA Passthrough patches. Xen VGA
>>>>>>> Passthrough to Windows 8 Consumer Preview HVM domU is 
>>>>>>> successful. Or I
>>>>>>> should say *PARTIALLY* successful. Why? Please see the screenshots
>>>>>>> below.
>>>>>> Hi,
>>>>>> which CPU do you have? Intel E6300?
>>>>>> Did you notice that CPU doesn't support VT-d?
>>>>> Dear Pavel Mateja,
>>>>>
>>>>> My CPU is Intel Pentium Dual Core E6300 2.8 GHz which supports Intel
>>>>> Virtualization Technology, i.e. VT-x, not VT-d.
>>>>>
>>>>> BUT, my Intel DQ45CB desktop motherboard supports Intel VT-d. The
>>>>> motherboard BIOS also has VT-d option.
>>>>>
>>>>> Thank you very much.
>>>> Hi again,
>>>> I'm affraid you have to cross-reference
 
>>>> http://processormatch.intel.com/CompDB/SearchResult.aspx?BoardName=DQ45CB 
>>>> 
>>>>
>>>> and
>>>> http://ark.intel.com/search/advanced?VTD=true
>>> Dear Pavel Mateja,
>>>
>>> I can confirm my Intel Pentium Dual Core E6300 2.8 GHz supports VT-x  
>>> and my Intel DQ45CB desktop board and motherboard BIOS supports VT-d. 
>>> Would you like to have a photo screenshot of the motherboard BIOS  
>>> showing the VT-d option? This is concrete evidence showing that my  
>>> hardware configuration supports VT-d. I can even post a video if you  
>>> want it.
>>>
>>> Thank you very much.
>>>
>> afaik the vt-d support was in the chipset for the core2duo / quad  
>> series and was moved to the cpu since the core "i" series. so i guess  
>> he is right.
>>
> Oh I see.
>

Also you can verify the VT-d IOMMU support from Xen dmesg:
http://wiki.xen.org/wiki/Xen_Common_Problems#How_can_I_check_if_my_hardware_has_an_IOMMU_.28VT-d.29_and_it.27s_enabled_and_supported.3F

-- Pasi


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