[Qemu-arm] [PATCH v2 04/24] hw/arm/virt: explicitly allocate cpu_index for cpus

[Igor Mammedov]

Currently cpu_index is implicitly auto assigned during
cpu.realize() time cpu_exec_realizefn()->cpu_list_add().

It happens to match index in possible_cpus so take
control over it and make board initialize cpu_index
to possible_cpus index explicitly. It will at least
document that board is in control of it and when
'-device cpu' support comes it will keep cpu_index
stable regardless of order cpus are created so it won't
break migration.
Within this series it will be used for internal
conversion from storing cpu_index based NUMA node
bitmaps to property based mapping with possible_cpus,
And will allow map cpu_index to a CPU entry in
possible_cpus array.

Signed-off-by: Igor Mammedov <address@hidden>
Reviewed-by: Andrew Jones <address@hidden>
---
 hw/arm/virt.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index e2c5626..acc748e 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1349,6 +1349,7 @@ static void machvirt_init(MachineState *machine)
     possible_cpus = mc->possible_cpu_arch_ids(machine);
     for (n = 0; n < possible_cpus->len; n++) {
         Object *cpuobj;
+        CPUState *cs;
 
         if (n >= smp_cpus) {
             break;
@@ -1358,6 +1359,9 @@ static void machvirt_init(MachineState *machine)
         object_property_set_int(cpuobj, possible_cpus->cpus[n].arch_id,
                                 "mp-affinity", NULL);
 
+        cs = CPU(cpuobj);
+        cs->cpu_index = n;
+
         if (!vms->secure) {
             object_property_set_bool(cpuobj, false, "has_el3", NULL);
         }
-- 
2.7.4