[Xen-users] SR-IOV error "not enough MMIO resources for SR-IOV"

[Christian Zoffoli <czoffoli@xxxxxxxxxxx>]

Hi to all,
I'm trying to enable SR-IOV on an Intel 82576.
I've enabled IOMMU in bios and I've also added iommu=pv to xen command
line but when I try to load the igb driver with max_vfs=4 I cannot
enable SR-IOV.

I'm testing SUSE 11 SP1 with latest patches and the motherboard is a
supermicro H8DGU-LN4F+ with a couple of AMD 6168.

here is a part of the dmesg output


[    7.382215] igb 0000:08:00.1: Intel(R) Gigabit Ethernet Network
Connection
[    7.382294] igb 0000:08:00.1: eth0: (PCIe:2.5Gb/s:Width x4)
00:25:90:19:57:cf
[    7.382425] igb 0000:08:00.1: eth0: PBA No: ffffff-0ff
[    7.382473] igb 0000:08:00.1: Using MSI-X interrupts. 4 rx queue(s),
4 tx queue(s)
[    7.382846] igb 0000:02:00.0: power state changed by ACPI to D0
[    7.382994] igb 0000:02:00.0: power state changed by ACPI to D0
[    7.383057] igb 0000:02:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[    7.383183] igb 0000:02:00.0: setting latency timer to 64
[    7.383537] igb 0000:02:00.0: not enough MMIO resources for SR-IOV
[    7.383752] igb 0000:02:00.0: irq 573 (253) for MSI/MSI-X
[    7.383790] igb 0000:02:00.0: irq 572 (252) for MSI/MSI-X
[    7.383827] igb 0000:02:00.0: irq 571 (251) for MSI/MSI-X
[    7.383866] igb 0000:02:00.0: irq 570 (250) for MSI/MSI-X
[    7.383903] igb 0000:02:00.0: irq 569 (249) for MSI/MSI-X
[    7.383940] igb 0000:02:00.0: irq 568 (248) for MSI/MSI-X
[    7.384015] igb 0000:02:00.0: irq 567 (247) for MSI/MSI-X
[    7.384064] igb 0000:02:00.0: irq 566 (246) for MSI/MSI-X
[    7.384113] igb 0000:02:00.0: irq 565 (245) for MSI/MSI-X


Could anyone give me some hints? ...do you think it's a bios issue or
something else?


Best regards,
Christian

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