Re: [vfio-users] Question about iommu groups

2019-06-18 Thread Alex Williamson
On Tue, 18 Jun 2019 16:47:58 +0100 James Courtier-Dutton wrote: > On Tue, 18 Jun 2019 at 16:18, Alex Williamson > wrote: > > > [cc +vfio-users] > > > > You need a version of the hot reset unit test that accepts multiple > > devices since each is in a separate group. The grouping on the Asus >

Re: [vfio-users] Question about iommu groups

2019-06-18 Thread James Courtier-Dutton
On Tue, 18 Jun 2019 at 16:18, Alex Williamson wrote: > [cc +vfio-users] > > You need a version of the hot reset unit test that accepts multiple > devices since each is in a separate group. The grouping on the Asus > system you provided is preferred, it's not a problem. Thanks, > > Do you have s

Re: [vfio-users] Question about iommu groups

2019-06-18 Thread Alex Williamson
[cc +vfio-users] On Tue, 18 Jun 2019 15:33:36 +0100 James Courtier-Dutton wrote: > Hi, > > I could not see anywhere it mentioning ACS in the dmesg logs, so I don't > think it is using ACS. > > Is there some way to tell from the logs that ACS is involved. See previous reply. > I have 2 AMD Th

Re: [vfio-users] Question about iommu groups

2019-06-18 Thread Alex Williamson
[cc +vfio-users] On Tue, 18 Jun 2019 15:23:08 +0100 James Courtier-Dutton wrote: > Hi, > > Attaching dmesg and lspci -nnvvv Vega 10 seems to have ACS, great. The root ports and the downstream switch ports also support ACS, great. The grouping seems correct from the bits I checked. System bo

Re: [vfio-users] Question about iommu groups

2019-06-18 Thread Alex Williamson
On Tue, 18 Jun 2019 11:43:58 +0100 James Courtier-Dutton wrote: > Hi, > > In the following list of iommu groups, I am wondering why sub-functions on > the same PCIe card are not being given the same IOMMU group as I would > expect. I can't provide any specifics without further details, a full '

[vfio-users] Question about iommu groups

2019-06-18 Thread James Courtier-Dutton
Hi, In the following list of iommu groups, I am wondering why sub-functions on the same PCIe card are not being given the same IOMMU group as I would expect. For example, I would have expected the GPU and the HMDI Audio for that GPU to be in the same IOMMU group. I am asking, because, with the c