virt-pci: add platform bus support

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This driver registers PCI busses, but the underlying virtio protocol
could just as easily be used to provide a platform bus instead.  If the
virtio device node in the devicetree indicates that it's compatible with
simple-bus, register platform devices instead of handling it as a PCI
bus.

Only one platform bus is allowed and the logic MMIO region for the
platform bus is placed at an arbitrarily-chosen address away from the
PCI region.

Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

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Vincent Whitchurch 2023-01-27 15:30:27 +01:00 • committed by Richard Weinberger

parent 935f8f7a01

commit 522c532c4f

1 changed files with 91 additions and 0 deletions

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arch/um/drivers/virt-pci.c

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