On Tue, 2011-09-06 at 10:36 +0200, Jan Kiszka wrote: > On 2011-09-06 10:12, Michael S. Tsirkin wrote: > > On Tue, Sep 06, 2011 at 10:52:41AM +0300, Avi Kivity wrote: > >>> > >>> BTW, the same is also true for that optional per-vector masking of > >>> legacy MSI. Are there devices in the field that actually support this? I > >>> haven't found one so far and tend to consider this feature not worth > >>> implementing. > >> > >> Don't know. I don't like implementing features on the basis of bug > >> reports, though. On the other hand we can't really test it without > >> a real device. > > > > Linux will use this capability if present. So > > we could add support for an emulated device (e.g. e1000), > > then test with nested virt once iommu emulation lands :) > > Yeah, would be kind of cool. Still, I would feel better having it tested > against a real silicon as well. Also to prove that there is a real need. > > So, in case someone stumbles for such a device (bit 8 set in MSI control > word), please let us know! Doesn't any device that supports MSI-X supports per-vector masking? >From the spec: "MSI and MSI-X each support per-vector masking. Per-vector masking is an optional extension to MSI, and a standard feature with MSI-X" -- Sasha. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
