[vfio-users] IOMMU Group with PCI Bridge and 10gbe nic

[Zachary Boley]

I actually have 2 nics and 1 lan nic and I pass one of them to windows and
use the other for host, its pretty easy in virtmanager especially if they
are in their own groups.

On Sep 14, 2017 3:11 PM, "Allen Dial" <adial at mac.com> wrote:

> Hi VFIO-Users,
>
> I have 2 of 3 2 port NICs that I would like to passthrough to guest vms
> but am not sure how best to go about it as 1, they get divided up (not the
> biggest issue other than I don't know how I will tell which one is which
> physically out the back of the machine) but more importantly they each get
> grouped with pci bridges in their iommu groups.
>
> Is it possible to pass 4 of the interfaces to vms and keep 2 of them for
> the host?
>
> Below is some hopefully helpful information from the terminal:
>
> group 39
> /sys/kernel/iommu_groups/39/devices/0000:42:02.0
> 42:02.0 PCI bridge: Integrated Device Technology, Inc. [IDT] PES24T3G2 PCI
> Express Gen2 Switch (rev 02)
> /sys/kernel/iommu_groups/39/devices/0000:43:00.0
> 43:00.0 Ethernet controller: MYRICOM Inc. Myri-10G Dual-Protocol NIC (rev
> 01)
>
> group 40
> /sys/kernel/iommu_groups/40/devices/0000:42:04.0
> 42:04.0 PCI bridge: Integrated Device Technology, Inc. [IDT] PES24T3G2 PCI
> Express Gen2 Switch (rev 02)
> /sys/kernel/iommu_groups/40/devices/0000:44:00.0
> 44:00.0 Ethernet controller: MYRICOM Inc. Myri-10G Dual-Protocol NIC (rev
> 01)
>
> group 42
> /sys/kernel/iommu_groups/42/devices/0000:47:02.0
> 47:02.0 PCI bridge: Integrated Device Technology, Inc. [IDT] PES24T3G2 PCI
> Express Gen2 Switch (rev 02)
> /sys/kernel/iommu_groups/42/devices/0000:48:00.0
> 48:00.0 Ethernet controller: MYRICOM Inc. Myri-10G Dual-Protocol NIC (rev
> 01)
>
> group 43
> /sys/kernel/iommu_groups/43/devices/0000:47:04.0
> 47:04.0 PCI bridge: Integrated Device Technology, Inc. [IDT] PES24T3G2 PCI
> Express Gen2 Switch (rev 02)
> /sys/kernel/iommu_groups/43/devices/0000:49:00.0
> 49:00.0 Ethernet controller: MYRICOM Inc. Myri-10G Dual-Protocol NIC (rev
> 01)
>
> group 45
> /sys/kernel/iommu_groups/45/devices/0000:4b:02.0
> 4b:02.0 PCI bridge: Integrated Device Technology, Inc. [IDT] PES24T3G2 PCI
> Express Gen2 Switch (rev 02)
> /sys/kernel/iommu_groups/45/devices/0000:4c:00.0
> 4c:00.0 Ethernet controller: MYRICOM Inc. Myri-10G Dual-Protocol NIC (rev
> 01)
>
> group 46
> /sys/kernel/iommu_groups/46/devices/0000:4b:04.0
> 4b:04.0 PCI bridge: Integrated Device Technology, Inc. [IDT] PES24T3G2 PCI
> Express Gen2 Switch (rev 02)
> /sys/kernel/iommu_groups/46/devices/0000:4d:00.0
> 4d:00.0 Ethernet controller: MYRICOM Inc. Myri-10G Dual-Protocol NIC (rev
> 01)
>
> Thank you,
>
> Allen
>
>
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