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Re: [Xen-devel] Design doc of adding ACPI support for arm64 on Xen

On 05/08/15 12:49, Shannon Zhao wrote:
>> That's great!
>> Keep in mind that many ARM platforms have non-PCI busses, so I think
>> we'll need an amba and a platform bus_notifier too, in addition to the
>> existing pci bus notifier.
> Thanks for your reminding. I thought about amba. Since ACPI of current
> linux kernel doesn't support probe amba bus devices, so this
> bus_notifier will not be used at the moment. But there are some voice
> that we need to make ACPI support amba on the linux arm kernel mail
> list. And to me it doesn't matter to add the amba bus_notifier.

This comment raised one question. What happen if the hardware has MMIO
region not described in the ACPI?

Does the driver would have to call a specific xen function to register
the missing I/O?


Julien Grall

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