From a3e53273ad52551b61c0cdb8f48a19eb22c05831 Mon Sep 17 00:00:00 2001
From: Bharata B Rao <bharata@linux.vnet.ibm.com>
Date: Thu, 27 Apr 2017 10:48:22 +0530
Subject: cpus: Fix CPU unplug for MTTCG

Ensure that the unplugged CPU thread is destroyed and the waiting
thread is notified about it. This is needed for CPU unplug to work
correctly in MTTCG mode.

Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 cpus.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'cpus.c')

diff --git a/cpus.c b/cpus.c
index 740b8dc3f8..79f780b654 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1483,6 +1483,12 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
                 /* Ignore everything else? */
                 break;
             }
+        } else if (cpu->unplug) {
+            qemu_tcg_destroy_vcpu(cpu);
+            cpu->created = false;
+            qemu_cond_signal(&qemu_cpu_cond);
+            qemu_mutex_unlock_iothread();
+            return NULL;
         }
 
         atomic_mb_set(&cpu->exit_request, 0);
-- 
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