Re: [Xen-devel] [PATCH 16/16] HACK: xen: arm: map PCI controller ranges region MMIOs to dom0.

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Thu, 2013-11-21 at 14:32 +0000, Julien Grall wrote:
> 
> On 11/20/2013 02:48 PM, Ian Campbell wrote:
> > The ranges property of a node with device_type = "pci" is defined in ePAPR
> > 2.3.8. Map the appropriate MMIO regions through to dom0.
> >
> > This is a hack/PoC since it actually crashes for some reason. Hence it
> > contains a hacked in hardcoded list suitable for Xgene while I figure this
> > out.
> >
> > This should also eventually handle the interrupt-map and (ePAPR 2.4.3.1) and
> > possibly dma-ranges (ePAPR 2.3.9) and msi-ranges (unspeciifed?) too.
> 
> 
> For pci ranges, you can add a new bus in dt_bues. So you won't need 
> specific code in domain_build.c and we will be able to use it later.
> You can take a look to linux/drivers/of/address.c

Won't we still need to handle the resulting extra MMIO addresses which
are not part of the reg region?

> Mapping interrupt should be OK. I don't see any reason that will fail 
> with the current code because IRQ are all under the GIC controller.

We need to parse interrupt-map because the child interrupts are not
listed in the regular interrupts property.

Ian.


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