On Thu, 1 Oct 2015 16:40:10 -0700 Alexander Duyck <alexander.duyck at gmail.com> wrote:
> Do you really need to map IORESOURCE bars? Most drivers I can think of > don't use IO BARs anymore. Maybe we could look at just dropping the > code and adding it back later if we have a use case that absolutely > needs it. Mapping is not strictly necessary, but for virtio it acts a way to communicate the regions. > Also how many devices actually need resources beyond BAR 0? I'm just > curious as I know BAR 2 on many of the Intel devices is the register > space related to MSI-X so now we have both the PCIe subsystem and user > space with access to this region. VMXNet3 needs 2 bars. Most use only one.
