Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [PATCH V2 22/23] pci, acpi: Match PCI config space accessors against platfrom specific quirks. | Date | Mon, 21 Dec 2015 23:42:18 +0100 |
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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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