During GED device creation at Virt Machine initialization, add a new vCPU
hotplug event to the existing set of supported GED device events. Additionally,
initialize the memory map for the vCPU hotplug *control device*, which will
provide an interface to exchange ACPI events between QEMU/VMM and the Guest
Kernel.
Signed-off-by: Salil Mehta <salil.me...@huawei.com>
Reviewed-by: Gavin Shan <gs...@redhat.com>
---
hw/arm/virt.c | 5 ++++-
include/hw/arm/virt.h | 1 +
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 00fd65b4e1..b9df428049 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -81,6 +81,7 @@
#include "hw/mem/pc-dimm.h"
#include "hw/mem/nvdimm.h"
#include "hw/acpi/generic_event_device.h"
+#include "hw/acpi/cpu_hotplug.h"
#include "hw/virtio/virtio-md-pci.h"
#include "hw/virtio/virtio-iommu.h"
#include "hw/char/pl011.h"
@@ -181,6 +182,7 @@ static const MemMapEntry base_memmap[] = {
[VIRT_NVDIMM_ACPI] = { 0x09090000, NVDIMM_ACPI_IO_LEN},
[VIRT_PVTIME] = { 0x090a0000, 0x00010000 },
[VIRT_SECURE_GPIO] = { 0x090b0000, 0x00001000 },
+ [VIRT_CPUHP_ACPI] = { 0x090c0000, ACPI_CPU_HOTPLUG_REG_LEN},
[VIRT_MMIO] = { 0x0a000000, 0x00000200 },
/* ...repeating for a total of NUM_VIRTIO_TRANSPORTS, each of that size */
[VIRT_PLATFORM_BUS] = { 0x0c000000, 0x02000000 },
@@ -678,7 +680,7 @@ static inline DeviceState *create_acpi_ged(VirtMachineState
*vms)
DeviceState *dev;
MachineState *ms = MACHINE(vms);
int irq = vms->irqmap[VIRT_ACPI_GED];
- uint32_t event = ACPI_GED_PWR_DOWN_EVT;
+ uint32_t event = ACPI_GED_PWR_DOWN_EVT | ACPI_GED_CPU_HOTPLUG_EVT;
if (ms->ram_slots) {
event |= ACPI_GED_MEM_HOTPLUG_EVT;
@@ -694,6 +696,7 @@ static inline DeviceState *create_acpi_ged(VirtMachineState
*vms)
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, vms->memmap[VIRT_ACPI_GED].base);
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 1,
vms->memmap[VIRT_PCDIMM_ACPI].base);
+ sysbus_mmio_map(SYS_BUS_DEVICE(dev), 3, vms->memmap[VIRT_CPUHP_ACPI].base);
sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, qdev_get_gpio_in(vms->gic,
irq));
return dev;
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index 362422413c..b5bfb75f71 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -78,6 +78,7 @@ enum {
VIRT_PCDIMM_ACPI,
VIRT_ACPI_GED,
VIRT_NVDIMM_ACPI,
+ VIRT_CPUHP_ACPI,
VIRT_PVTIME,
VIRT_LOWMEMMAP_LAST,
};
--
2.34.1
