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powerpc/numa: Prefer node id queried from vphn

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Node id queried from the static device tree may not
be correct. For example: it may always show 0 on a shared processor.
Hence prefer the node id queried from vphn and fallback on the device tree
based node id if vphn query fails.

Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200818081104.57888-3-srikar@linux.vnet.ibm.com
This commit is contained in:
Srikar Dronamraju 2020-08-18 13:41:03 +05:30 committed by Michael Ellerman
parent a874f1005e
commit 6398eaa268
1 changed files with 10 additions and 9 deletions
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17
arch/powerpc/mm/numa.c
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@ -728,20 +728,21 @@ static int __init parse_numa_properties(void)
*/
for_each_present_cpu(i) {
struct device_node *cpu;
int nid;
cpu = of_get_cpu_node(i, NULL);
BUG_ON(!cpu);
nid = of_node_to_nid_single(cpu);
of_node_put(cpu);
int nid = vphn_get_nid(i);
/*
* Don't fall back to default_nid yet -- we will plug
* cpus into nodes once the memory scan has discovered
* the topology.
*/
if (nid < 0)
continue;
if (nid == NUMA_NO_NODE) {
cpu = of_get_cpu_node(i, NULL);
BUG_ON(!cpu);
nid = of_node_to_nid_single(cpu);
of_node_put(cpu);
}
if (likely(nid > 0))
node_set_online(nid);
}