On 12.01.2015 22:20, Peter Maydell wrote: > On 12 January 2015 at 21:06, Alexander Graf <ag...@suse.de> wrote: >> >> >> On 12.01.15 21:08, Peter Maydell wrote: >>> On 12 January 2015 at 17:38, Alexander Graf <ag...@suse.de> wrote: >>>> I'd prefer to keep things as easy as we humanly can for now. Then add >>>> MSI. And if we then realize that we still need 4 rather than 1 shared >>>> interrupt lines we can still change it :) >>> >>> Except that that would be a breaking change, so I would prefer >>> to think ahead where possible; at some point there will come >>> a time when we really can't make breaking changes to this >>> board any more... >> >> Works for me, then we stay at a single interrupt line. The only reason >> we have 4 in PCI is that back in the day you could have non-sharing PCI >> devices that were essentially ISA ones. > > Well, also your typical small system probably doesn't have more > than 4 PCI slots and so 4 IRQs is enough to give them each one. > Most small VMs probably won't have more than four PCI devices > either... > > -- PMM >
This solution with 4 slots, 4 irqs would be preferable to me.. Ciao, Claudio
