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Re: [Xen-devel] [rfc 00/18] ioemu: use devfn instead of slots as the uni
| To: | Simon Horman <horms@xxxxxxxxxxxx>, Yuji Shimada <shimada-yxb@xxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [rfc 00/18] ioemu: use devfn instead of slots as the unit for passthrough |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Mon, 23 Feb 2009 03:31:30 -0800 |
| Cc: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx> |
| Delivery-date: | Mon, 23 Feb 2009 03:31:58 -0800 |
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| Thread-index: | AcmVg7p93Er4v6PzTjq3frgUAnmLxwAJosHw |
| Thread-topic: | [Xen-devel] [rfc 00/18] ioemu: use devfn instead of slots as the unit for passthrough |
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On 22/02/2009 22:55, "Simon Horman" <horms@xxxxxxxxxxxx> wrote: >> The another solution is expanding GSI to 127. I don't sure it is >> possible, but sharing virtual GSI will not occur. > > That thought crossed my mind too, I will investigate further. > But I think that ideally it would need to be expanded to 143 > as the first 16 GSI are currently reserved for ISA. Can't xend or qemu do a search of PCI slot space to pick a virtual devfn:intx that doesn't conflict (or that purposely does conflict, if there are any cases where you want that)? 32 non-legacy GSIs should be enough to avoid any aliasing if a bit of effort is put in to avoid it. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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