[PATCH RFC 09/22] arm/cpuhp: Init GED framework with cpu hotplug events

[Salil Mehta]

ACPI GED(as described in the ACPI 6.2 spec) can be used to generate ACPI events
when OSPM/guest receives an interrupt listed in the _CRS object of GED. OSPM
then maps or demultiplexes the event by evaluating _EVT method.

This change adds the support of cpu hotplug event initialization in the
existing GED framework.

Co-developed-by: Keqian Zhu <zhukeqi...@huawei.com>
Signed-off-by: Salil Mehta <salil.me...@huawei.com>
---
 hw/acpi/generic_event_device.c         | 8 ++++++++
 hw/arm/virt.c                          | 3 ++-
 include/hw/acpi/generic_event_device.h | 5 +++++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
index 1cb34111e5..0f2c8a959e 100644
--- a/hw/acpi/generic_event_device.c
+++ b/hw/acpi/generic_event_device.c
@@ -25,6 +25,7 @@ static const uint32_t ged_supported_events[] = {
     ACPI_GED_MEM_HOTPLUG_EVT,
     ACPI_GED_PWR_DOWN_EVT,
     ACPI_GED_NVDIMM_HOTPLUG_EVT,
+    ACPI_GED_CPU_HOTPLUG_EVT,
 };
 
 /*
@@ -305,6 +306,13 @@ static void acpi_ged_initfn(Object *obj)
      sysbus_init_mmio(sbd, &s->container_memhp);
      acpi_memory_hotplug_init(&s->container_memhp, OBJECT(dev),
                               &s->memhp_state, 0);
+
+     s->cpuhp.device = OBJECT(s);
+     memory_region_init(&s->container_cpuhp, OBJECT(dev), "cpuhp container",
+                        ACPI_CPU_HOTPLUG_REG_LEN);
+     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->container_cpuhp);
+     cpu_hotplug_hw_init(&s->container_cpuhp, OBJECT(dev),
+                         &s->cpuhp_state, 0);
 }
 
 static void acpi_ged_class_init(ObjectClass *class, void *data)
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index fe37babe35..e9ead0e2dd 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -552,7 +552,7 @@ 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;
@@ -567,6 +567,7 @@ 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), 2, vms->memmap[VIRT_CPUHP_ACPI].base);
     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, qdev_get_gpio_in(vms->gic, 
irq));
 
     qdev_init_nofail(dev);
diff --git a/include/hw/acpi/generic_event_device.h 
b/include/hw/acpi/generic_event_device.h
index 90a9180db5..b04037cf62 100644
--- a/include/hw/acpi/generic_event_device.h
+++ b/include/hw/acpi/generic_event_device.h
@@ -62,6 +62,7 @@
 #include "hw/sysbus.h"
 #include "hw/acpi/memory_hotplug.h"
 #include "hw/acpi/ghes.h"
+#include "hw/acpi/cpu_hotplug.h"
 
 #define ACPI_POWER_BUTTON_DEVICE "PWRB"
 
@@ -84,6 +85,7 @@
 #define ACPI_GED_MEM_HOTPLUG_EVT   0x1
 #define ACPI_GED_PWR_DOWN_EVT      0x2
 #define ACPI_GED_NVDIMM_HOTPLUG_EVT 0x4
+#define ACPI_GED_CPU_HOTPLUG_EVT    0x8
 
 typedef struct GEDState {
     MemoryRegion evt;
@@ -94,6 +96,9 @@ typedef struct AcpiGedState {
     SysBusDevice parent_obj;
     MemHotplugState memhp_state;
     MemoryRegion container_memhp;
+    CPUHotplugState cpuhp_state;
+    MemoryRegion container_cpuhp;
+    AcpiCpuHotplug cpuhp;
     GEDState ged_state;
     uint32_t ged_event_bitmap;
     qemu_irq irq;
-- 
2.17.1