Re: [Xen-devel] How to switch VGA passthrough live

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Fri, 4 Jun 2010, 于佳耕 wrote:
> 
> Hi,
> 
> I want to switch video card live between two HVMs. My simplest idea is that 
> when the HVM has the permission to access
> passthrough video card, and another HVM will be paused. If switch from A to 
> B, execute commands :
> 
> xm pause A ;
> 
> xm pci-detach A  00:00:02.0 ;
> 
> xm pci-attach B 00:00:02.0 ;
> 
> xm unpause B.
> 
>  
> 
> I have a try, but failed. The pseudo-code is as below. Can you give me some 
> ideas? Any suggestions will be thankful.
> 

pci-detach needs cooperation from the guest, how the guest is supposed
to handle the acpi interrupt if it is paused?

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