Adds support to ARM virtualization to allow handling
generic error ACPI Event via GED & error source device.

It is aligned with Linux Kernel patch:
https://lore.kernel.org/lkml/1272350481-27951-8-git-send-email-ying.huang@intel.com/

Co-authored-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Co-authored-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Igor Mammedov <imammedo@redhat.com>
---
 hw/acpi/ghes.c           |  3 +++
 hw/arm/virt-acpi-build.c |  1 +
 hw/arm/virt.c            | 12 +++++++++++-
 include/hw/acpi/ghes.h   |  3 +++
 include/hw/arm/virt.h    |  1 +
 5 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index e9511d9b8f71..13b105c5d02d 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -444,6 +444,9 @@ int acpi_ghes_record_errors(uint8_t source_id, uint64_t physical_address)
     return ret;
 }
 
+NotifierList acpi_generic_error_notifiers =
+    NOTIFIER_LIST_INITIALIZER(error_device_notifiers);
+
 bool acpi_ghes_present(void)
 {
     AcpiGedState *acpi_ged_state;
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index f76fb117adff..1769467d23b2 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -858,6 +858,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
     }
 
     acpi_dsdt_add_power_button(scope);
+    aml_append(scope, aml_error_device());
 #ifdef CONFIG_TPM
     acpi_dsdt_add_tpm(scope, vms);
 #endif
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 687fe0bb8bc9..22448e5c5b73 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -677,7 +677,7 @@ 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_ERROR_EVT;
 
     if (ms->ram_slots) {
         event |= ACPI_GED_MEM_HOTPLUG_EVT;
@@ -1009,6 +1009,13 @@ static void virt_powerdown_req(Notifier *n, void *opaque)
     }
 }
 
+static void virt_generic_error_req(Notifier *n, void *opaque)
+{
+    VirtMachineState *s = container_of(n, VirtMachineState, generic_error_notifier);
+
+    acpi_send_event(s->acpi_dev, ACPI_GENERIC_ERROR);
+}
+
 static void create_gpio_keys(char *fdt, DeviceState *pl061_dev,
                              uint32_t phandle)
 {
@@ -2385,6 +2392,9 @@ static void machvirt_init(MachineState *machine)
 
     if (has_ged && aarch64 && firmware_loaded && virt_is_acpi_enabled(vms)) {
         vms->acpi_dev = create_acpi_ged(vms);
+        vms->generic_error_notifier.notify = virt_generic_error_req;
+        notifier_list_add(&acpi_generic_error_notifiers,
+                          &vms->generic_error_notifier);
     } else {
         create_gpio_devices(vms, VIRT_GPIO, sysmem);
     }
diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
index 674f6958e905..fb80897e7eac 100644
--- a/include/hw/acpi/ghes.h
+++ b/include/hw/acpi/ghes.h
@@ -23,6 +23,9 @@
 #define ACPI_GHES_H
 
 #include "hw/acpi/bios-linker-loader.h"
+#include "qemu/notify.h"
+
+extern NotifierList acpi_generic_error_notifiers;
 
 /*
  * Values for Hardware Error Notification Type field
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index a4d937ed45ac..ad9f6e94dcc5 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -175,6 +175,7 @@ struct VirtMachineState {
     DeviceState *gic;
     DeviceState *acpi_dev;
     Notifier powerdown_notifier;
+    Notifier generic_error_notifier;
     PCIBus *bus;
     char *oem_id;
     char *oem_table_id;
-- 
2.46.0