[PATCH V4] powerpc/prom: Export device tree physical address via proc

Segher Boessenkool segher at kernel.crashing.org
Sun Jul 18 02:41:24 EST 2010

>>>> Yes. Where would we get a list of memreserve sections?
>>> I would say the list of reserves that are not under the control of
>>> Linux should be explicitly described in the device tree proper.  For
>>> instance, if you have a region that firmware depends on, then have a
>>> node for describing the firmware and a property stating the memory
>>> regions that it depends on.  The memreserve regions can be generated
>>> from that.
>> Ok, so we could traverse the tree node-by-bode for a
>> persistent-memreserve property and add them to the /memreserve/  
>> list in
>> the kexec user space tools?
> I *think* that is okay, but I'd like to hear from Segher, Ben, Mitch,
> David Gibson, and other device tree experts on whether or not that
> exact property naming is a good one.

Let's take a step back: what exactly _are_ "memreserve sections", what
are they used for, who (kernel, firmware, bootloader, etc.) holds what
responsibility wrt them?


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