RE: [Xen-devel] [rfc 00/18] ioemu: use devfn instead of slots as the unit for passthrough

["Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>]

xen-devel-bounces@xxxxxxxxxxxxxxxxxxx <> wrote:
> On 05/03/2009 09:05, "Simon Horman" <horms@xxxxxxxxxxxx> wrote:
> 
>> * I have not accounted for MSI devices/functions at this time,
>>   but my understanding is that they don't need a GSI at all.
>>   So it should be just a matter of giving them a device
>>   and making sure nothing else uses it.
> 
> Depending on how critical your
> no-sharing-between-passthru-devices is, you
> might need to be careful with this. Just because a device is MSI-capable
> doesn't mean the guest OS will use it (I don't know how common
> that would be

I think most OS will support a option to disable MSI, like Vista or Linux.

Thanks
Yunhong Jiang

> in practice though!) -- generally there will be a legacy INTx operation mode
> which you might want to consider allocating GSIs for. Just a point of
> information. 
> 
> -- Keir
> 
> 
> 
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