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

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 03/03/2009 05:57, "Yuji Shimada" <shimada-yxb@xxxxxxxxxxxxxxx> wrote:

>> Your approach is also no good for PCI hotplug, since I'm pretty sure you
>> cannot update GSI bindings after the guest has booted. Unless there's some
>> ACPI magic that could be employed in this case.
> 
> If you want to assign many devices to guest, it is one of approaches
> to expand GSIs statically.  You can support hot-plug easily.

How many devices do you want to assign? Bear in mind that most guests will
support MSI anyway, so this INTx issue is rather moot. I'd rather stretch
what we have than introduce extra INTx modes, requiring backward
compatibility, etc.

 -- Keir



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