>>> On 10.11.16 at 18:21, <konrad.w...@oracle.com> wrote: > On Thu, Nov 10, 2016 at 04:20:34PM +0100, Roger Pau Monné wrote: >> > 0a:11.4 Ethernet controller: Intel Corporation 82576 Virtual Function >> > (rev 01) >> > Subsystem: Super Micro Computer Inc Device 10c9 >> > Flags: bus master, fast devsel, latency 0 >> > [virtual] Memory at fbdb8000 (64-bit, non-prefetchable) [size=16K] >> > [virtual] Memory at fbd98000 (64-bit, non-prefetchable) [size=16K] >> > Capabilities: [70] MSI-X: Enable+ Count=3 Masked- >> > Capabilities: [a0] Express Endpoint, MSI 00 >> > Capabilities: [100] Advanced Error Reporting >> > Capabilities: [150] Alternative Routing-ID Interpretation (ARI) >> > Kernel driver in use: igbvf >> >> So it seems that the memory for individual VFs is taken from the BARs listed >> inside of PCI_EXT_CAP_ID_SRIOV. > > Yup! I think that is right as the BIOS also enable SR-IOV to figure out how > many bus addresses to reserve for the PCIe device - and then it turn it off. > (I know this as I had a motherboard with half-broken implemention that booted > in OS with VFs already there).
But remember that in the common case you won't be able to access the SR-IOV capability structure before launching Dom0 (as being located in extended config space). Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
