On Sat, Apr 15, 2017 at 5:06 PM, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> wrote: > On Sat, 2017-04-15 at 11:36 -0500, Bjorn Helgaas wrote: >> > I agree in principle. I'm surprised that PowerPC is the only one >> > interested here though, what about other platforms who want to use >> > KVM and PCI pass-through and use Linux to assign BARs ? >> >> If I understand correctly, the problem is with BARs smaller than a >> page, and this happens more on PowerPC because larger page sizes are >> more common there. > > Yes, it happens "more". That doesn't mean it doesn't happen at all on > others :-) Anyway, I'm not objecting, just surprised. Yeah, I agree. Maybe the devices interesting for pass-through tend to have BARs of least 4KB? Those would never be a problem on x86. But I have absolutely no data either way.
