On 3/14/2017 4:33 PM, Allain Legacy wrote: > From: Matt Peters <matt.pet...@windriver.com> > > Allow the BAR setup to succeed if a device has at least 1 BAR region > defined. Previously, the device probe would only succeed if at least one > memory BAR existed, but there are devices that have only port I/O BARs. > > For example, on Virtual Box a virtio device has only a single I/O BAR > because by default MSI-X is not enabled. While in qemu/kvm the virtio > device has MSI-X enabled and therefore has both an I/O and Memory BAR. > > The following are excerpts from "lspci -nnvvvv -s 00:09.0" on both types of > systems. > > Virtual Box: > > Region 0: I/O ports at d260 [size=32] > Capabilities: [80] #00 [0000] > > QEMU/KVM: > > Region 0: I/O ports at c060 [size=32] > Region 1: Memory at febd1000 (32-bit, non-prefetchable) [size=4K] > Expansion ROM at feb80000 [disabled] [size=256K] > Capabilities: [40] MSI-X: Enable+ Count=3 Masked- > Vector table: BAR=1 offset=00000000 > PBA: BAR=1 offset=00000800 > > Signed-off-by: Matt Peters <matt.pet...@windriver.com> > Signed-off-by: Allain Legacy <allain.leg...@windriver.com>
Acked-by: Ferruh Yigit <ferruh.yi...@intel.com>
