Arnd Bergmann 418cb6c8e0
PCI: hv: Generify PCI probing ...
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=y 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, MSI
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.
Link: https://lore.kernel.org/r/20210726180657.142727-6-boqun.feng@gmail.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de >
Signed-off-by: Boqun Feng <boqun.feng@gmail.com >
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com >
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