qemu/hw-arm-virt-Factor-out-some-CPU-init-codes-to-pre_pl.patch

From 3a0af1446395e74476a763ca12713b28c099a144 Mon Sep 17 00:00:00 2001
From: Keqian Zhu <zhukeqian1@huawei.com>
Date: Mon, 6 Apr 2020 12:50:54 +0800
Subject: [PATCH] hw/arm/virt: Factor out some CPU init codes to pre_plug hook

The init path of hotplugged CPU is pre_plug/realize/plug, so we
must move these init code in machvirt_init to pre_plug hook, to
let them be shared by all CPUs.

Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
---
 hw/arm/virt.c | 108 +++++++++++++++++++++++++++-----------------------
 1 file changed, 58 insertions(+), 50 deletions(-)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 64532b61b2..83f4887e57 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -196,6 +196,8 @@ static const char *valid_cpus[] = {
     ARM_CPU_TYPE_NAME("max"),
 };

+static MemoryRegion *secure_sysmem;
+
 static bool cpu_type_valid(const char *cpu)
 {
     int i;
@@ -1629,7 +1631,6 @@ static void machvirt_init(MachineState *machine)
     MachineClass *mc = MACHINE_GET_CLASS(machine);
     const CPUArchIdList *possible_cpus;
     MemoryRegion *sysmem = get_system_memory();
-    MemoryRegion *secure_sysmem = NULL;
     int n, virt_max_cpus;
     MemoryRegion *ram = g_new(MemoryRegion, 1);
     bool firmware_loaded;
@@ -1752,57 +1753,10 @@ static void machvirt_init(MachineState *machine)
         }

         cpuobj = object_new(possible_cpus->cpus[n].type);
-        object_property_set_int(cpuobj, possible_cpus->cpus[n].arch_id,
-                                "mp-affinity", NULL);
+        aarch64 &= object_property_get_bool(cpuobj, "aarch64", NULL);

         cs = CPU(cpuobj);
         cs->cpu_index = n;
-
-        numa_cpu_pre_plug(&possible_cpus->cpus[cs->cpu_index], DEVICE(cpuobj),
-                          &error_fatal);
-
-        aarch64 &= object_property_get_bool(cpuobj, "aarch64", NULL);
-
-        if (!vms->secure) {
-            object_property_set_bool(cpuobj, false, "has_el3", NULL);
-        }
-
-        if (!vms->virt && object_property_find(cpuobj, "has_el2", NULL)) {
-            object_property_set_bool(cpuobj, false, "has_el2", NULL);
-        }
-
-        if (vms->psci_conduit != QEMU_PSCI_CONDUIT_DISABLED) {
-            object_property_set_int(cpuobj, vms->psci_conduit,
-                                    "psci-conduit", NULL);
-
-            /* Secondary CPUs start in PSCI powered-down state */
-            if (n > 0) {
-                object_property_set_bool(cpuobj, true,
-                                         "start-powered-off", NULL);
-            }
-        }
-
-        if (vmc->kvm_no_adjvtime &&
-            object_property_find(cpuobj, "kvm-no-adjvtime", NULL)) {
-            object_property_set_bool(cpuobj, true, "kvm-no-adjvtime", NULL);
-        }
-
-        if (vmc->no_pmu && object_property_find(cpuobj, "pmu", NULL)) {
-            object_property_set_bool(cpuobj, false, "pmu", NULL);
-        }
-
-        if (object_property_find(cpuobj, "reset-cbar", NULL)) {
-            object_property_set_int(cpuobj, vms->memmap[VIRT_CPUPERIPHS].base,
-                                    "reset-cbar", &error_abort);
-        }
-
-        object_property_set_link(cpuobj, OBJECT(sysmem), "memory",
-                                 &error_abort);
-        if (vms->secure) {
-            object_property_set_link(cpuobj, OBJECT(secure_sysmem),
-                                     "secure-memory", &error_abort);
-        }
-
         object_property_set_bool(cpuobj, true, "realized", &error_fatal);
         object_unref(cpuobj);
     }
@@ -2089,10 +2043,16 @@ out:
 static void virt_cpu_pre_plug(HotplugHandler *hotplug_dev,
                               DeviceState *dev, Error **errp)
 {
-    CPUState *cs = CPU(dev);
     ARMCPUTopoInfo topo;
+    Object *cpuobj = OBJECT(dev);
+    CPUState *cs = CPU(dev);
     ARMCPU *cpu = ARM_CPU(dev);
     MachineState *ms = MACHINE(hotplug_dev);
+    MachineClass *mc = MACHINE_GET_CLASS(hotplug_dev);
+    VirtMachineState *vms = VIRT_MACHINE(hotplug_dev);
+    VirtMachineClass *vmc = VIRT_MACHINE_GET_CLASS(hotplug_dev);
+    const CPUArchIdList *possible_cpus = mc->possible_cpu_arch_ids(ms);
+    MemoryRegion *sysmem = get_system_memory();
     int smp_cores = ms->smp.cores;
     int smp_threads = ms->smp.threads;

@@ -2145,6 +2105,54 @@ static void virt_cpu_pre_plug(HotplugHandler *hotplug_dev,
         return;
     }
     cpu->thread_id = topo.smt_id;
+
+    /* Init some properties */
+
+    object_property_set_int(cpuobj, possible_cpus->cpus[cs->cpu_index].arch_id,
+                            "mp-affinity", NULL);
+
+    numa_cpu_pre_plug(&possible_cpus->cpus[cs->cpu_index], DEVICE(cpuobj),
+                      &error_fatal);
+
+    if (!vms->secure) {
+        object_property_set_bool(cpuobj, false, "has_el3", NULL);
+    }
+
+    if (!vms->virt && object_property_find(cpuobj, "has_el2", NULL)) {
+        object_property_set_bool(cpuobj, false, "has_el2", NULL);
+    }
+
+    if (vms->psci_conduit != QEMU_PSCI_CONDUIT_DISABLED) {
+        object_property_set_int(cpuobj, vms->psci_conduit,
+                                "psci-conduit", NULL);
+
+        /* Secondary CPUs start in PSCI powered-down state */
+        if (cs->cpu_index > 0) {
+            object_property_set_bool(cpuobj, true,
+                                     "start-powered-off", NULL);
+        }
+    }
+
+    if (vmc->kvm_no_adjvtime &&
+        object_property_find(cpuobj, "kvm-no-adjvtime", NULL)) {
+        object_property_set_bool(cpuobj, true, "kvm-no-adjvtime", NULL);
+    }
+
+    if (vmc->no_pmu && object_property_find(cpuobj, "pmu", NULL)) {
+        object_property_set_bool(cpuobj, false, "pmu", NULL);
+    }
+
+    if (object_property_find(cpuobj, "reset-cbar", NULL)) {
+        object_property_set_int(cpuobj, vms->memmap[VIRT_CPUPERIPHS].base,
+                                "reset-cbar", &error_abort);
+    }
+
+    object_property_set_link(cpuobj, OBJECT(sysmem), "memory",
+                             &error_abort);
+    if (vms->secure) {
+        object_property_set_link(cpuobj, OBJECT(secure_sysmem),
+                                 "secure-memory", &error_abort);
+    }
 }

 static void virt_cpu_plug(HotplugHandler *hotplug_dev,
--
2.19.1