On Mon, 2016-06-27 at 15:22 -0300, Thiago Jung Bauermann wrote:
> Am Donnerstag, 23 Juni 2016, 17:54:49 schrieb Geoff Levand:
> > +linux,usable-memory
> > +-------------------
> > +
> > +This property is set on PowerPC and arm64 by kexec-tools during kdump
> > +to tell the crash kernel the base address of its reserved area of memory,
> > and +the size. e.g.
> > +
> > +/ {
> > + chosen {
> > + linux,usable-memory = <0x9 0xf0000000 0x0 0x10000000>;
> > + };
> > +};
>
> On powerpc, linux,usable-memory isn't in /chosen. It is put by kexec-tools
> in each /memory node and has the same format as the reg property. During
> early boot, the kernel goes through the /memory nodes to find usable memory
> and for each node, if there's a linux,usable-memory property it will use it
> instead of the reg property to find the ranges of memory it can use (see
> early_init_dt_scan_memory in drivers/of/fdt.c).
Yep that sounds right to me.
Added in:
ba7594852f4e ("[PATCH] powerpc: Add support for "linux,usable-memory" on memory nodes")
cheers
