Wire up S3 and S4 sleep by setting relevant slp-typs bits for
GED and generate _S3 and _S4 methods in acpi table.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 hw/loongarch/acpi-build.c | 18 ++++++++++++++++++
 hw/loongarch/virt.c       |  3 +++
 2 files changed, 21 insertions(+)

diff --git a/hw/loongarch/acpi-build.c b/hw/loongarch/acpi-build.c
index af45ce526d6e..2cb1696b579b 100644
--- a/hw/loongarch/acpi-build.c
+++ b/hw/loongarch/acpi-build.c
@@ -416,6 +416,24 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, MachineState *machine)
     acpi_dsdt_add_tpm(dsdt, lvms);
 #endif
     /* System State Package */
+    scope = aml_scope("\\");
+    pkg = aml_package(4);
+    aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S3));
+    aml_append(pkg, aml_int(0)); /* ignored */
+    aml_append(pkg, aml_int(0)); /* reserved */
+    aml_append(pkg, aml_int(0)); /* reserved */
+    aml_append(scope, aml_name_decl("_S3", pkg));
+    aml_append(dsdt, scope);
+
+    scope = aml_scope("\\");
+    pkg = aml_package(4);
+    aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S4));
+    aml_append(pkg, aml_int(0)); /* ignored */
+    aml_append(pkg, aml_int(0)); /* reserved */
+    aml_append(pkg, aml_int(0)); /* reserved */
+    aml_append(scope, aml_name_decl("_S4", pkg));
+    aml_append(dsdt, scope);
+
     scope = aml_scope("\\");
     pkg = aml_package(4);
     aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5));
diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c
index 66cef201abe0..a4b55f00a32b 100644
--- a/hw/loongarch/virt.c
+++ b/hw/loongarch/virt.c
@@ -615,6 +615,9 @@ static DeviceState *create_acpi_ged(DeviceState *pch_pic,
     }
     dev = qdev_new(TYPE_ACPI_GED);
     qdev_prop_set_uint32(dev, "ged-event", event);
+    qdev_prop_set_uint32(dev, "slp-typs", (1 << ACPI_GED_SLP_TYP_S3) |
+                         (1 << ACPI_GED_SLP_TYP_S4) |
+                         (1 << ACPI_GED_SLP_TYP_S5));
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     /* ged event */

-- 
2.43.0