On Thu, Mar 12, 2020 at 02:09:55PM +0800, Lu Baolu wrote: > @@ -128,6 +129,13 @@ dmar_alloc_pci_notify_info(struct pci_dev *dev, unsigned long event) > > BUG_ON(dev->is_virtfn); > > + /* > + * Ignore devices that have a domain number higher than what can > + * be looked up in DMAR, e.g. VMD subdevices with domain 0x10000 > + */ > + if (pci_domain_nr(dev->bus) > U16_MAX) I think this needs a well documented core PCI layer function, as that is where these "fake" domains are create.
