RE: device passthrough

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Thanks, Chris,

Do you know where is the patch, I just need something quick and dirty for now, my shining new board does have VT-d but the BIOS is not ready yet, I want to have something "working" now.

Mu 

> -----Original Message-----
> From: Chris Wright [mailto:chrisw@xxxxxxxxxxxx] 
> Sent: Friday, May 28, 2010 12:33 PM
> To: Mu Lin
> Cc: kvm@xxxxxxxxxxxxxxx
> Subject: Re: device passthrough
> 
> * Mu Lin (mul@xxxxxxxxxxx) wrote:
> > Is there any method to directly assign a device to Guest OS 
>  without VT-d?
> 
> Assuming you mean a PCI device, no, there isn't.
> 
> Without an IOMMU[1] you can't directly assign a PCI device to 
> a guest (nor is it safe).  There have been patches floating 
> around to allow this, but they don't maintain secure isolation.
> 
> thanks,
> -chris
> 
> [1] VT-d is an Intel chipset feature, so you could certainly 
> do it on an AMD platform that has an AMD IOMMU.
> --
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