On 20.05.2021 02:36, Boris Ostrovsky wrote: > > On 5/18/21 12:13 PM, Jan Beulich wrote: >> >> @@ -95,22 +95,25 @@ static int __xen_pcibk_add_pci_dev(struc >> >> /* >> * Keep multi-function devices together on the virtual PCI bus, except >> - * virtual functions. >> + * that we want to keep virtual functions at func 0 on their own. They >> + * aren't multi-function devices and hence their presence at func 0 >> + * may cause guests to not scan the other functions. > > > So your reading of the original commit is that whatever the issue it was, > only function zero was causing the problem? In other words, you are not > concerned that pci_scan_slot() may now look at function 1 and skip all > higher-numbered function (assuming the problem is still there)?
I'm not sure I understand the question: Whether to look at higher numbered slots is a function of slot 0's multi-function bit alone, aiui. IOW if slot 1 is being looked at in the first place, slots 2-7 should also be looked at. Jan
