Re: pci passthrough issue introduced between 4.14.1 and 4.15.0

[George Dunlap <dunlapg@umich.edu>]

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On Tue, Jun 1, 2021 at 8:34 AM AL13N <alien@rmail.be> wrote:

> Not 100% it's a bug or something i did wrong, but,
>
> with xl create i start a PV with 3 pci passthroughs
>
> after wards, xl pci-list shows all 3 nicely
>
> looking at the domU boot logs, pcifront is only creating one pci device
> and lspci in the guest shows only 1 pci entry
>
> in at least 4.14.1 it still works.
>
> looking deeper, if you start with only 1 entry or 0 and you do
> pci-attach for the other pci entries, all of this works fine.
>
> this is the pci section in question:
>
> pci=['0000:04:00.0,permissive=1',
> '0000:00:1a.0,permissive=1,rdm_policy=relaxed,seize=1',
> '0000:00:1d.0,permissive=1,rdm_policy=relaxed,seize=1']
>
> this works fine in 4.12.1 and 4.14.1, but fails in 4.15.0, however
>
> booting with pci=['0000:04:00.0,permissive=1'] and then doing
>
> []# xl pci-attach <domain>
> '0000:00:1a.0,permissive=1,rdm_policy=relaxed,seize=1'
> []# xl pci-attach <domain>
> '0000:00:1d.0,permissive=1,rdm_policy=relaxed,seize=1'
>
> also works,
>

Sounds like it might be a tools issue?

 -George

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