Originally igb_uio had code for MSI, but it was broken. See my patches which fixed that and several other bugs.
On Tue, May 20, 2014 at 8:26 PM, Burakov, Anatoly <anatoly.burakov at intel.com > wrote: > Hi Stephen, > > > I am not sure that MSI-X has any advantage with only one IRQ, so MSI > would > > do. > > Igb_uio doesn't support MSI, so I never included MSI support. It can be > added though, but I don't see much point. > > > Then have the code look at the PCI capability of device and fallback to > INTX if > > needed. It should also check if INTX works, see kernel for details, > since some > > PCI emulation like VMware is broken. > > I believe VFIO itself does that already when it sets up interrupts. > > Best regards, > Anatoly Burakov > DPDK SW Engineer > > > >
