On Mon, 06 Feb 2017 10:43:09 -0800
John Baldwin <j...@freebsd.org> wrote:

> On Monday, February 06, 2017 02:41:34 PM Andrew Turner wrote:
> > Author: andrew
> > Date: Mon Feb  6 14:41:34 2017
> > New Revision: 313342
> > URL: https://svnweb.freebsd.org/changeset/base/313342
> > 
> > Log:
> >   Only build the ACPI PCI drivers on x86, they are unlikely to be
> > used on arm64 without dignificant changes.
> >   
> >   Obtained from:    ABT Systems Ltd
> >   Sponsored by:     The FreeBSD Foundation  
> 
> I still think this is not really the right approach.  Nothing about
> _BBN, _CRS, or _PRT, etc. is x86-specific.
> 

the main issue is the code assumes a single PCIe root controller, e.g.
the pci_cfg* KPI won't work on ThunderX with 6 independent PCIe root
controllers. I expect much of the code could be re-enabled on arm64,
however for now it's easier to disable it.

Andrew
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