ACPI will be enabled by default. Add a switch to turn off
for testing and debug purposes.

Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
---
 hw/riscv/virt.c         | 29 +++++++++++++++++++++++++++++
 include/hw/riscv/virt.h |  2 ++
 2 files changed, 31 insertions(+)

diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 4118d28468..89d5b9d8aa 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -50,6 +50,7 @@
 #include "hw/pci-host/gpex.h"
 #include "hw/display/ramfb.h"
 #include "hw/acpi/aml-build.h"
+#include "qapi/qapi-visit-common.h"
 
 /*
  * The virt machine physical address space used by some of the devices
@@ -1526,6 +1527,7 @@ static void virt_machine_instance_init(Object *obj)
 
     s->oem_id = g_strndup(ACPI_BUILD_APPNAME6, 6);
     s->oem_table_id = g_strndup(ACPI_BUILD_APPNAME8, 8);
+    s->acpi = ON_OFF_AUTO_AUTO;
 }
 
 static char *virt_get_aia_guests(Object *obj, Error **errp)
@@ -1600,6 +1602,28 @@ static void virt_set_aclint(Object *obj, bool value, Error **errp)
     s->have_aclint = value;
 }
 
+bool virt_is_acpi_enabled(RISCVVirtState *s)
+{
+    return s->acpi != ON_OFF_AUTO_OFF;
+}
+
+static void virt_get_acpi(Object *obj, Visitor *v, const char *name,
+                          void *opaque, Error **errp)
+{
+    RISCVVirtState *s = RISCV_VIRT_MACHINE(obj);
+    OnOffAuto acpi = s->acpi;
+
+    visit_type_OnOffAuto(v, name, &acpi, errp);
+}
+
+static void virt_set_acpi(Object *obj, Visitor *v, const char *name,
+                          void *opaque, Error **errp)
+{
+    RISCVVirtState *s = RISCV_VIRT_MACHINE(obj);
+
+    visit_type_OnOffAuto(v, name, &s->acpi, errp);
+}
+
 static HotplugHandler *virt_machine_get_hotplug_handler(MachineState *machine,
                                                         DeviceState *dev)
 {
@@ -1671,6 +1695,11 @@ static void virt_machine_class_init(ObjectClass *oc, void *data)
     sprintf(str, "Set number of guest MMIO pages for AIA IMSIC. Valid value "
                  "should be between 0 and %d.", VIRT_IRQCHIP_MAX_GUESTS);
     object_class_property_set_description(oc, "aia-guests", str);
+    object_class_property_add(oc, "acpi", "OnOffAuto",
+                              virt_get_acpi, virt_set_acpi,
+                              NULL, NULL);
+    object_class_property_set_description(oc, "acpi",
+                                          "Enable ACPI");
 }
 
 static const TypeInfo virt_machine_typeinfo = {
diff --git a/include/hw/riscv/virt.h b/include/hw/riscv/virt.h
index 6c7885bf89..62efebaa32 100644
--- a/include/hw/riscv/virt.h
+++ b/include/hw/riscv/virt.h
@@ -58,6 +58,7 @@ struct RISCVVirtState {
     int aia_guests;
     char *oem_id;
     char *oem_table_id;
+    OnOffAuto acpi;
 };
 
 enum {
@@ -123,4 +124,5 @@ enum {
 #define FDT_APLIC_INT_MAP_WIDTH (FDT_PCI_ADDR_CELLS + FDT_PCI_INT_CELLS + \
                                  1 + FDT_APLIC_INT_CELLS)
 
+bool virt_is_acpi_enabled(RISCVVirtState *s);
 #endif
-- 
2.34.1