RE: [Xen-devel] Intel VT-d Support

["Li, Haicheng" <haicheng.li@xxxxxxxxx>]

Igor Chubin wrote:
> Hello all,
> 
> 
> please tell me, how can I be sure that
> my Xen installation is built with Intel VT-d support?
> 
> Something like
> 
> xm info | grep -i KEY-REGULAR-EXPRESSION
> xm dmesg | grep -i KEY-REGULAR-EXPRESSION

Use "xm dmesg | grep -i vt-d".

> 
> What a line should I look for?

Find the line "Intel VT-d has been enabled."
 
> And if my installation was really built with VT-d support,
> how can I be sure, that Xen has successfully
> initialized VT-d hardware?

Try assigning a pci device to hvm guest as [1] describes. If vt-d is not
enabled or the device is not hidden, the guest creation will fail.
otherwise, you can use `lspci` in the guest to find out the device
assigned.

> I have read [1] and the lists archives
> and found no answers for my question.
> 
> 
> 
> Thank you in advance.
> 
> 
> 
> [1] http://wiki.xensource.com/xenwiki/VTdHowTo



-- haicheng

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