The primary hwthread ceases the scheduler of secondary hwthread by
bringing them into NAP. Then, the secondary is ready for guest.
Signed-off-by: Liu Ping Fan <pingf...@linux.vnet.ibm.com>
---
arch/powerpc/kvm/book3s_hv.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 4348abd..7896c31 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -1593,15 +1593,22 @@ static int on_primary_thread(void)
{
int cpu = smp_processor_id();
int thr;
+ struct cpumask msk;
/* Are we on a primary subcore? */
if (cpu_thread_in_subcore(cpu))
return 0;
thr = 0;
+#ifdef KVMPPC_ENABLE_SECONDARY
+ while (++thr < threads_per_subcore)
+ cpumask_set_cpu(thr, &msk);
+ stop_cpus_async(&msk, kvmppc_secondary_stopper, NULL);
+#else
while (++thr < threads_per_subcore)
if (cpu_online(cpu + thr))
return 0;
+#endif
/* Grab all hw threads so they can't go into the kernel */
for (thr = 1; thr < threads_per_subcore; ++thr) {
--
1.8.3.1
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