Re: [Xen-devel] [PATCH 7/7] xen/arm: Blacklist some sun7i UARTs

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Fri, 2013-09-20 at 20:02 +0100, Julien Grall wrote:

> > +    /*
> > +     * These UARTs share a page with the Xen console UART, so we don't
> > +     * want to map them through.
> > +     */
> > +    DT_MATCH_PATH("/soc@01c00000/serial@01c28000"),
> > +    DT_MATCH_PATH("/soc@01c00000/serial@01c28400"),
> > +    DT_MATCH_PATH("/soc@01c00000/serial@01c28800"),
> > +    DT_MATCH_PATH("/soc@01c00000/serial@01c28c00"),
> 
> Can we blacklist all the UARTs via a DT_MATCH_COMPATIBLE? It's better 
> than relying on the path that can be changed easily in the device tree.

There are other UARTS (at 0x1c29xxx) which could safely be exposed to
dom0. Perhaps it is better to just blacklist the whole lot though.

Ultimately this is just a hack for the fact that Xen is not currently
smart enough to figure out which devices conflict in this way...

Ian.


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