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SubjectRe: [PATCH V2 22/23] pci, acpi: Match PCI config space accessors against platfrom specific quirks.
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On Monday 21 December 2015, David Daney wrote:
> On 12/21/2015 06:10 AM, Arnd Bergmann wrote:
> > On Monday 21 December 2015, Gabriele Paoloni wrote:
>
> > or require the BIOS to work around the hardware
> > quirks differently (e.g. by trapping config space access through secure
> > firmware, or going through an AML method to be defined).
>
> Some systems don't seem to have this capability. For example, in ARMv8
> (A.K.A. arm64), I haven't been able to figure out how to trap these
> accesses to EL3 for emulation. The specification is 5700 pages long
> though, so perhaps I missed that bit.

How about using AML then? This would be similar to what CHRP used with
RTAS calls to do PCI config space access.

Arnd


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