[Qemu-devel] [PATCH v2 9/9] s390x/cpu: Allow hot plug/unplug of CPUs

[Matthew Rosato <mjrosato@linux.vnet.ibm.com>]

Allow hotplug of s390-cpu devices via device_add, and unplug
via device_del.

Signed-off-by: Matthew Rosato <mjrosato@linux.vnet.ibm.com>
---
 target-s390x/cpu.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/target-s390x/cpu.c b/target-s390x/cpu.c
index 4b83a09..a4be7b7 100644
--- a/target-s390x/cpu.c
+++ b/target-s390x/cpu.c
@@ -31,6 +31,7 @@
 #include "trace.h"
 #ifndef CONFIG_USER_ONLY
 #include "sysemu/arch_init.h"
+#include "hw/s390x/sclp.h"
 #include "sysemu/sysemu.h"
 #endif
 
@@ -225,6 +226,12 @@ static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
 #endif
 
     scc->parent_realize(dev, errp);
+
+#if !defined(CONFIG_USER_ONLY)
+    if (dev->hotplugged) {
+        raise_irq_cpu_hotplug();
+    }
+#endif
 }
 
 static void s390_cpu_initfn(Object *obj)
@@ -398,6 +405,10 @@ static void s390_cpu_class_init(ObjectClass *oc, void *data)
     scc->parent_realize = dc->realize;
     dc->realize = s390_cpu_realizefn;
 
+    /* Necessary prep-work for s390-cpu is handled in
+     * instance_init() and realize(), so allow device_add */
+    dc->cannot_instantiate_with_device_add_yet = false;
+
     scc->parent_reset = cc->reset;
 #if !defined(CONFIG_USER_ONLY)
     scc->load_normal = s390_cpu_load_normal;
-- 
1.9.1