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powerpc/vphn: Improve recognition of PRRN/VPHN

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powerpc/vphn: On Power systems with shared configurations of CPUs
and memory, there are some issues with the association of additional
CPUs and memory to nodes when hot-adding resources.  This patch
updates the initialization checks to independently recognize PRRN
or VPHN support.

Signed-off-by: Michael Bringmann <mwb@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Bringmann 2017-09-08 15:47:36 -05:00 committed by Michael Ellerman
parent 17f444c054
commit a3496e9137
1 changed files with 4 additions and 4 deletions
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8
arch/powerpc/mm/numa.c
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@ -1531,15 +1531,14 @@ int start_topology_update(void)
if (firmware_has_feature(FW_FEATURE_PRRN)) {
if (!prrn_enabled) {
prrn_enabled = 1;
vphn_enabled = 0;
#ifdef CONFIG_SMP
rc = of_reconfig_notifier_register(&dt_update_nb);
#endif
}
} else if (firmware_has_feature(FW_FEATURE_VPHN) &&
}
if (firmware_has_feature(FW_FEATURE_VPHN) &&
lppaca_shared_proc(get_lppaca())) {
if (!vphn_enabled) {
prrn_enabled = 0;
vphn_enabled = 1;
setup_cpu_associativity_change_counters();
init_timer_deferrable(&topology_timer);
@ -1562,7 +1561,8 @@ int stop_topology_update(void)
#ifdef CONFIG_SMP
rc = of_reconfig_notifier_unregister(&dt_update_nb);
#endif
} else if (vphn_enabled) {
}
if (vphn_enabled) {
vphn_enabled = 0;
rc = del_timer_sync(&topology_timer);
}