IOMMU and VFs

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Hello,

I have the following issue:
Our HW device is SRIOV capable, I have tried passing through one of its Virtual Functions to a guest OS Running RH5.4 on the guest and the host.
The function is seen by "lspci" on the guest, however, when the HW tries to DMA the guest with the BDF of the VF, it sees all 0's.
Same operation succeeds when the virtual device runs on the host.
I have VT-d enabled in BIOS.
Is there is anything else I need to configure?

Thanks,
Yevgeny


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