[Qemu-devel] [PATCH 20/21] target-i386: implement machine->hot_add_cpu hook

[Igor Mammedov]

Signed-off-by: Igor Mammedov <imamm...@redhat.com>
---
 hw/i386/pc.c |   22 ++++++++++++++++++++++
 1 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 5e50127..b649ed5 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -54,6 +54,7 @@
 #include "qemu/config-file.h"
 #include "hw/acpi/acpi.h"
 #include "hw/cpu/icc_bus.h"
+#include "hw/boards.h"
 
 /* debug PC/ISA interrupts */
 //#define DEBUG_IRQ
@@ -914,6 +915,25 @@ static X86CPU *pc_new_cpu(const char *cpu_model, int64_t 
apic_id, Error **errp)
     return cpu;
 }
 
+static void do_cpu_hot_add(const int64_t id, Error **errp)
+{
+    int64_t apic_id = x86_cpu_apic_id_from_index(id);
+
+    if (cpu_exists(apic_id)) {
+        error_setg(errp, "Unable to add CPU: %" PRIi64
+                   ", it already exists", id);
+        return;
+    }
+
+    if (id >= max_cpus) {
+        error_setg(errp, "Unable to add CPU: %" PRIi64
+                   ", max allowed: %d", id, max_cpus - 1);
+        return;
+    }
+
+    pc_new_cpu(machine_args->cpu_model, apic_id, errp);
+}
+
 void pc_cpus_init(const char *cpu_model)
 {
     int i;
@@ -928,7 +948,9 @@ void pc_cpus_init(const char *cpu_model)
 #else
         cpu_model = "qemu32";
 #endif
+        machine_args->cpu_model = cpu_model;
     }
+    current_machine->hot_add_cpu = do_cpu_hot_add;
 
     icc_bridge = SYS_BUS_DEVICE(object_resolve_path_type("icc-bridge",
                                                  TYPE_ICC_BRIDGE, NULL));
-- 
1.7.1