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hw/i386/pc: Support hv-balloon 

Add the necessary plumbing for the hv-balloon driver to the PC machine.

Co-developed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
This commit is contained in:
Maciej S. Szmigiero 2023-08-23 23:36:35 +02:00
parent 259ebed45a
commit 9a52aa40dc
2 changed files with 23 additions and 0 deletions
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1
hw/i386/Kconfig
View File

@ -45,6 +45,7 @@ config PC
select ACPI_VMGENID
select VIRTIO_PMEM_SUPPORTED
select VIRTIO_MEM_SUPPORTED
select HV_BALLOON_SUPPORTED
config PC_PCI
bool

22
hw/i386/pc.c
View File

@ -27,6 +27,7 @@
#include "hw/i386/pc.h"
#include "hw/char/serial.h"
#include "hw/char/parallel.h"
#include "hw/hyperv/hv-balloon.h"
#include "hw/i386/fw_cfg.h"
#include "hw/i386/vmport.h"
#include "sysemu/cpus.h"
@ -57,6 +58,7 @@
#include "hw/i386/kvm/xen_evtchn.h"
#include "hw/i386/kvm/xen_gnttab.h"
#include "hw/i386/kvm/xen_xenstore.h"
#include "hw/mem/memory-device.h"
#include "e820_memory_layout.h"
#include "trace.h"
#include CONFIG_DEVICES
@ -1422,6 +1424,21 @@ static void pc_memory_unplug(HotplugHandler *hotplug_dev,
error_propagate(errp, local_err);
}
static void pc_hv_balloon_pre_plug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
/* The vmbus handler has no hotplug handler; we should never end up here. */
g_assert(!dev->hotplugged);
memory_device_pre_plug(MEMORY_DEVICE(dev), MACHINE(hotplug_dev), NULL,
errp);
}
static void pc_hv_balloon_plug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
memory_device_plug(MEMORY_DEVICE(dev), MACHINE(hotplug_dev));
}
static void pc_machine_device_pre_plug_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
@ -1452,6 +1469,8 @@ static void pc_machine_device_pre_plug_cb(HotplugHandler *hotplug_dev,
return;
}
pcms->iommu = dev;
} else if (object_dynamic_cast(OBJECT(dev), TYPE_HV_BALLOON)) {
pc_hv_balloon_pre_plug(hotplug_dev, dev, errp);
}
}
@ -1464,6 +1483,8 @@ static void pc_machine_device_plug_cb(HotplugHandler *hotplug_dev,
x86_cpu_plug(hotplug_dev, dev, errp);
} else if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MD_PCI)) {
virtio_md_pci_plug(VIRTIO_MD_PCI(dev), MACHINE(hotplug_dev), errp);
} else if (object_dynamic_cast(OBJECT(dev), TYPE_HV_BALLOON)) {
pc_hv_balloon_plug(hotplug_dev, dev, errp);
}
}
@ -1505,6 +1526,7 @@ static HotplugHandler *pc_get_hotplug_handler(MachineState *machine,
object_dynamic_cast(OBJECT(dev), TYPE_CPU) ||
object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MD_PCI) ||
object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_IOMMU_PCI) ||
object_dynamic_cast(OBJECT(dev), TYPE_HV_BALLOON) ||
object_dynamic_cast(OBJECT(dev), TYPE_X86_IOMMU_DEVICE)) {
return HOTPLUG_HANDLER(machine);
}