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arm/virt: Add CPU hotplug framework

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Establish the CPU hotplug framework for arm/virt, we will add
necessary code legs to this framework gradually to realize CPU
hotplug finally.

Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
(cherry picked from commit 9dfe0cc4e9970f93b817068efd0bd6e0d98ca0b2)
This commit is contained in:
Chen Qun 2020-04-03 16:16:18 +08:00 committed by yezengruan
parent 5d3abd0f50
commit cfbdd7e3d7
1 changed files with 69 additions and 0 deletions
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69
arm-virt-Add-CPU-hotplug-framework.patch Normal file
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@ -0,0 +1,69 @@
From 209b3e4e522b8f7f41e495feaade96ee9a91e46a Mon Sep 17 00:00:00 2001
From: Keqian Zhu <zhukeqian1@huawei.com>
Date: Fri, 3 Apr 2020 16:16:18 +0800
Subject: [PATCH] arm/virt: Add CPU hotplug framework
Establish the CPU hotplug framework for arm/virt, we will add
necessary code legs to this framework gradually to realize CPU
hotplug finally.
Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
---
hw/arm/virt.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 9b73c479c4..11155fcb70 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -2586,6 +2586,18 @@ static void virt_memory_plug(HotplugHandler *hotplug_dev,
dev, &error_abort);
}
+static void virt_cpu_pre_plug(HotplugHandler *hotplug_dev,
+ DeviceState *dev, Error **errp)
+{
+ /* Currently nothing to do */
+}
+
+static void virt_cpu_plug(HotplugHandler *hotplug_dev,
+ DeviceState *dev, Error **errp)
+{
+ /* Currently nothing to do */
+}
+
static void virt_machine_device_pre_plug_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
@@ -2619,6 +2631,8 @@ static void virt_machine_device_pre_plug_cb(HotplugHandler *hotplug_dev,
qdev_prop_set_uint32(dev, "len-reserved-regions", 1);
qdev_prop_set_string(dev, "reserved-regions[0]", resv_prop_str);
g_free(resv_prop_str);
+ } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
+ virt_cpu_pre_plug(hotplug_dev, dev, errp);
}
}
@@ -2637,6 +2651,8 @@ static void virt_machine_device_plug_cb(HotplugHandler *hotplug_dev,
}
if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
virt_memory_plug(hotplug_dev, dev, errp);
+ } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
+ virt_cpu_plug(hotplug_dev, dev, errp);
}
if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_IOMMU_PCI)) {
PCIDevice *pdev = PCI_DEVICE(dev);
@@ -2717,7 +2733,8 @@ static HotplugHandler *virt_machine_get_hotplug_handler(MachineState *machine,
MachineClass *mc = MACHINE_GET_CLASS(machine);
if (device_is_dynamic_sysbus(mc, dev) ||
- (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM))) {
+ (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) ||
+ (object_dynamic_cast(OBJECT(dev), TYPE_CPU))) {
return HOTPLUG_HANDLER(machine);
}
if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_IOMMU_PCI)) {
--
2.27.0