On 14/11/2017 06:22, Anish wrote:
> Hi Andriy,
> Newer AMD IOMMU has EFR capability which is missing here, something like:
> ivhd0: PCI cap 0x190b640f@0x40 feature:19<IOTLB,EFR>
> Is this an old chipset?

Yes, this is an old 900 series chipset (990X).

> Also ivhd has fault interrupt enabled which is very
> helpful in debugging:
> [root@ryzen /home/anish/FreeBSD/head]# vmstat -ia |grep ivh
> irq256: ivhd0:fault                    0          0
> irq257: ivhd1:fault                    0          0

irq256: ivhd0:fault                    0          0

> Another thing to worth checking is PCI config space of ivhd/IOMMU if you have
not already done so.

For what should I look there?

Andriy Gapon
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