On Thu, Nov 18, 2010 at 12:09:18PM +0900, Isaku Yamahata wrote: > Right now, qemu is internally ready to handle pci-to-pci bridge emulators > and it's quite easy to add a new simple p2p bridge emulator. > Just a single function to initialize vid/did and a single PCIDevinceInfo. > > But it's difficult to use multi pci buses at the moment > because other part isn't ready. It's only for developers > who are interested in this area. > > BTW, how many pci buses/slots/functions do you want at most? > > > What we have in the upstream repository is > - various fixes for p2p bridge support > - the library for p2p bridge support > - pcie root/upstream/downstream port emulators which is p2p bridges > ioh3420/xio3130_upstream/xio3130_downstream > > What is missing for multiple pci buses is > - a new PC machine description which has multiple pci buses > My Q35 chipset patch will provide this.
IMHO, what we really need is a way to specify bridges through qdev. Not a machine with a hard-coded buses. The firmware paths used by Gleb's code might supply a good syntax to specify topology. > - a simple P2P bridge emulator for pc architecture > - seabios support > - DSDT for a new machine which has multi pci buses(IRQ routing) > - pv pci bus numbering Interesting. What's the motivation for this? > this isn't a must, I suppose > I have those patches locally. > > thanks, > > On Wed, Nov 17, 2010 at 12:58:43PM +0200, Michael S. Tsirkin wrote: > > On Tue, Nov 16, 2010 at 11:20:52AM -0800, Anjali Kulkarni wrote: > > > Hi, > > > > > > Can you elaborate what you mean by bridge support? I would really like to > > > go > > > to 256 interfaces. > > > > > > Anjali > > > > Isaku Yamahata wrote most of it, I'll let him comment. > > > > -- > > MST > > > > -- > yamahata
