[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 7/7] xen/arm: get the number of cpus from device tree
On Tue, 2012-11-13 at 15:42 +0000, Stefano Stabellini wrote: > diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c > index 3d1f0f4..5b6dab9 100644 > --- a/xen/common/device_tree.c > +++ b/xen/common/device_tree.c > @@ -153,6 +153,25 @@ const char *device_tree_bootargs(const void *fdt) > return prop->data; > } > > +int device_tree_cpus(const void *fdt) > +{ > + int node = 0, depth = 1; > + int cpus = 0; > + > + node = fdt_path_offset(fdt, "/cpus/cpu"); > + if ( node < 0 ) > + return 1; /* we have at least one cpu */ > + > + while ( node >= 0 && depth >= 0 ) { > + if ( strncmp(fdt_get_name(fdt, node, NULL), "cpu", 3) ) > + continue; > + node = fdt_next_node(fdt, node, &depth); > + cpus++; Do we not need to track the largest <n> for each cpu@<n> which we see, in order to handle systems with e.g. CPUs 0, 1, 4 & 5? There are some helpers in device_tree.c to walk over trees like this, are none of them suitable? _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |