[PATCH v3 25/29] hw/arm/virt: Let virt support pci hotplug/unplug GED event

[Eric Auger <eric.auger@redhat.com>]

Set up the IO registers used to communicate between QEMU
and ACPI.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

---
v2 -> v3:
- remove acpi_ged_state->pcihp_state.use_acpi_hotplug_bridge = true;
- use sysbus_mmio_map_name for all regs (Igor)
- create_pcie left at its original place

v1 -> v2:
- use ACPI_PCIHP_REGION_NAME
---
 include/hw/acpi/generic_event_device.h |  1 +
 hw/arm/virt.c                          | 19 +++++++++++++++++--
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/include/hw/acpi/generic_event_device.h b/include/hw/acpi/generic_event_device.h
index ec8e1abe0a..8f5d903146 100644
--- a/include/hw/acpi/generic_event_device.h
+++ b/include/hw/acpi/generic_event_device.h
@@ -111,6 +111,7 @@ typedef struct GEDState {
 } GEDState;
 
 #define ACPI_PCIHP_REGION_NAME "pcihp container"
+#define ACPI_MEMHP_REGION_NAME "memhp container"
 
 struct AcpiGedState {
     SysBusDevice parent_obj;
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 41be8f6dbb..8c882e0794 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -684,6 +684,8 @@ static inline DeviceState *create_acpi_ged(VirtMachineState *vms)
     DeviceState *dev;
     MachineState *ms = MACHINE(vms);
     SysBusDevice *sbdev;
+    AcpiGedState *acpi_ged_state;
+    AcpiPciHpState *pcihp_state;
     int irq = vms->irqmap[VIRT_ACPI_GED];
     uint32_t event = ACPI_GED_PWR_DOWN_EVT;
 
@@ -696,13 +698,26 @@ static inline DeviceState *create_acpi_ged(VirtMachineState *vms)
     }
 
     dev = qdev_new(TYPE_ACPI_GED);
+    acpi_ged_state = ACPI_GED(dev);
+    pcihp_state = &acpi_ged_state->pcihp_state;
+    if (pcihp_state->use_acpi_hotplug_bridge) {
+        event |= ACPI_GED_PCI_HOTPLUG_EVT;
+    }
     qdev_prop_set_uint32(dev, "ged-event", event);
     object_property_set_link(OBJECT(dev), "bus", OBJECT(vms->bus), &error_abort);
     sbdev = SYS_BUS_DEVICE(dev);
     sysbus_realize_and_unref(sbdev, &error_fatal);
 
-    sysbus_mmio_map(sbdev, 0, vms->memmap[VIRT_ACPI_GED].base);
-    sysbus_mmio_map(sbdev, 1, vms->memmap[VIRT_PCDIMM_ACPI].base);
+    sysbus_mmio_map_name(sbdev, TYPE_ACPI_GED, vms->memmap[VIRT_ACPI_GED].base);
+    sysbus_mmio_map_name(sbdev, ACPI_MEMHP_REGION_NAME,
+                         vms->memmap[VIRT_PCDIMM_ACPI].base);
+    if (pcihp_state->use_acpi_hotplug_bridge) {
+        int pcihp_region_index;
+
+        pcihp_region_index = sysbus_mmio_map_name(sbdev, ACPI_PCIHP_REGION_NAME,
+                                                  vms->memmap[VIRT_ACPI_PCIHP].base);
+        assert(pcihp_region_index >= 0);
+    }
     sysbus_connect_irq(sbdev, 0, qdev_get_gpio_in(vms->gic, irq));
 
     return dev;
-- 
2.49.0