[Qemu-devel] [PATCH 8/8] Revert "spapr: Ensure CPU cores are added contiguously and removed in LIFO order"

[Igor Mammedov <imammedo@redhat.com>]

From: David Gibson <david@gibson.dropbear.id.au>

This reverts commit 5cbc64de25973e9129c5a7897734a06ac64b9aff.

We've now removed the limitations which made out-of-order cpu hotplug
cause problems.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 hw/ppc/spapr_cpu_core.c | 21 +--------------------
 1 file changed, 1 insertion(+), 20 deletions(-)

diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
index f68e88d..dc5deb7 100644
--- a/hw/ppc/spapr_cpu_core.c
+++ b/hw/ppc/spapr_cpu_core.c
@@ -126,23 +126,12 @@ static void spapr_core_release(DeviceState *dev, void *opaque)
 void spapr_core_unplug(HotplugHandler *hotplug_dev, DeviceState *dev,
                        Error **errp)
 {
-    sPAPRMachineState *spapr = SPAPR_MACHINE(OBJECT(hotplug_dev));
     CPUCore *cc = CPU_CORE(dev);
     sPAPRDRConnector *drc =
         spapr_dr_connector_by_id(SPAPR_DR_CONNECTOR_TYPE_CPU, cc->core_id);
     sPAPRDRConnectorClass *drck;
     Error *local_err = NULL;
-    int smt = kvmppc_smt_threads();
-    int index = cc->core_id / smt;
-    int spapr_max_cores = max_cpus / smp_threads;
-    int i;
 
-    for (i = spapr_max_cores - 1; i > index; i--) {
-        if (spapr->cores[i]) {
-            error_setg(errp, "core-id %d should be removed first", i * smt);
-            return;
-        }
-    }
     g_assert(drc);
 
     drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
@@ -225,7 +214,7 @@ void spapr_core_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
     sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(OBJECT(hotplug_dev));
     sPAPRMachineState *spapr = SPAPR_MACHINE(OBJECT(hotplug_dev));
     int spapr_max_cores = max_cpus / smp_threads;
-    int index, i;
+    int index;
     int smt = kvmppc_smt_threads();
     Error *local_err = NULL;
     CPUCore *cc = CPU_CORE(dev);
@@ -263,14 +252,6 @@ void spapr_core_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
         goto out;
     }
 
-    for (i = 0; i < index; i++) {
-        if (!spapr->cores[i]) {
-            error_setg(&local_err, "core-id %d should be added first",
-                       i * smt);
-            goto out;
-        }
-    }
-
 out:
     g_free(base_core_type);
     error_propagate(errp, local_err);
-- 
2.7.4