Messages in this thread | | | Subject | Re: [PATCH] [powerpc] Export memory limit via device tree | From | Benjamin Herrenschmidt <> | Date | Wed, 11 Jul 2012 15:36:53 +1000 |
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> diff --git a/arch/powerpc/kernel/machine_kexec.c b/arch/powerpc/kernel/machine_kexec.c > index c957b12..0c9695d 100644 > --- a/arch/powerpc/kernel/machine_kexec.c > +++ b/arch/powerpc/kernel/machine_kexec.c > @@ -207,6 +207,12 @@ static struct property crashk_size_prop = { > .value = &crashk_size, > }; > > +static struct property memory_limit_prop = { > + .name = "linux,memory-limit", > + .length = sizeof(phys_addr_t), > + .value = &memory_limit, > +}; > +
AFAIK. phys_addr_t can change size, so instead make it point to a known fixes size quantity (a u64).
> + > + /* memory-limit is needed for constructing the crash regions */ > + prop = of_find_property(node, memory_limit_prop.name, NULL); > + if (prop) > + prom_remove_property(node, prop); > + > + if (memory_limit) > + prom_add_property(node, &memory_limit_prop); > +
There's a patch floating around making prom_update_property properly handle both pre-existing and non-pre-existing props, you should probably base yourself on top of it. I'm about to stick that patch in powerpc -next
Cheers, Ben.
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