On Wed, Jul 14, 2021 at 06:27:34PM +0800, Boqun Feng wrote: > From: Arnd Bergmann <arnd@xxxxxxxx> > > In order to support ARM64 Hyper-V PCI, we need to set up the bridge at > probing time because ARM64 is a PCI_DOMAIN_GENERIC arch and we don't > have pci_config_window (ARM64 sysdata) for a PCI root bus on Hyper-V, so > it's impossible to retrieve the information (e.g. PCI domains, irq > domains) from bus sysdata on ARM64 after creation. > > Originally in create_root_hv_pci_bus(), pci_create_root_bus() is used to > create the root bus and the corresponding bridge based on x86 sysdata. > Now we create a bridge first and then call pci_scan_root_bus_bridge(), > which allows us to do the necessary set-ups for the bridge. Also here and other patches in this series: s/irq/IRQ/ s/msi/MSI/ in subject lines, commit logs, comments.
