1 files changed, 50 insertions, 0 deletions

diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c
index bd5cff1f1e..256af63d73 100644
--- a/hw/loongarch/virt.c
+++ b/hw/loongarch/virt.c
@@ -48,6 +48,30 @@
 #include "qemu/error-report.h"
 #include "kvm/kvm_loongarch.h"
 
+static void virt_get_dmsi(Object *obj, Visitor *v, const char *name,
+                             void *opaque, Error **errp)
+{
+    LoongArchVirtMachineState *lvms = LOONGARCH_VIRT_MACHINE(obj);
+    OnOffAuto dmsi = lvms->dmsi;
+
+    visit_type_OnOffAuto(v, name, &dmsi, errp);
+
+}
+static void virt_set_dmsi(Object *obj, Visitor *v, const char *name,
+                              void *opaque, Error **errp)
+{
+    LoongArchVirtMachineState *lvms = LOONGARCH_VIRT_MACHINE(obj);
+
+    visit_type_OnOffAuto(v, name, &lvms->dmsi, errp);
+
+    if (lvms->dmsi == ON_OFF_AUTO_OFF) {
+        lvms->misc_feature &= ~BIT(IOCSRF_DMSI);
+        lvms->misc_status &= ~BIT_ULL(IOCSRM_DMSI_EN);
+    } else if (lvms->dmsi == ON_OFF_AUTO_ON) {
+        lvms->misc_feature = BIT(IOCSRF_DMSI);
+    }
+}
+
 static void virt_get_veiointc(Object *obj, Visitor *v, const char *name,
                               void *opaque, Error **errp)
 {
@@ -683,6 +707,25 @@ static void fw_cfg_add_memory(MachineState *ms)
     }
 }
 
+static void virt_check_dmsi(MachineState *machine)
+{
+    LoongArchCPU *cpu;
+    LoongArchVirtMachineState *lvms = LOONGARCH_VIRT_MACHINE(machine);
+
+    cpu = LOONGARCH_CPU(first_cpu);
+    if (lvms->dmsi == ON_OFF_AUTO_AUTO) {
+        if (cpu->msgint != ON_OFF_AUTO_OFF) {
+            lvms->misc_feature = BIT(IOCSRF_DMSI);
+        }
+    }
+
+    if (lvms->dmsi == ON_OFF_AUTO_ON && cpu->msgint == ON_OFF_AUTO_OFF) {
+        error_report("Fail to enable dmsi , cpu msgint is off "
+                     "pleass add cpu feature mesgint=on.");
+        exit(EXIT_FAILURE);
+    }
+}
+
 static void virt_init(MachineState *machine)
 {
     const char *cpu_model = machine->cpu_type;
@@ -717,6 +760,7 @@ static void virt_init(MachineState *machine)
         }
         qdev_realize_and_unref(DEVICE(cpuobj), NULL, &error_fatal);
     }
+    virt_check_dmsi(machine);
     fw_cfg_add_memory(machine);
 
     /* Node0 memory */
@@ -847,6 +891,8 @@ static void virt_initfn(Object *obj)
     if (tcg_enabled()) {
         lvms->veiointc = ON_OFF_AUTO_OFF;
     }
+
+    lvms->dmsi = ON_OFF_AUTO_AUTO;
     lvms->acpi = ON_OFF_AUTO_AUTO;
     lvms->oem_id = g_strndup(ACPI_BUILD_APPNAME6, 6);
     lvms->oem_table_id = g_strndup(ACPI_BUILD_APPNAME8, 8);
@@ -1241,6 +1287,10 @@ static void virt_class_init(ObjectClass *oc, const void *data)
         NULL, NULL);
     object_class_property_set_description(oc, "v-eiointc",
                             "Enable Virt Extend I/O Interrupt Controller.");
+    object_class_property_add(oc, "dmsi", "OnOffAuto",
+        virt_get_dmsi, virt_set_dmsi, NULL, NULL);
+    object_class_property_set_description(oc, "dmsi",
+                            "Enable direct Message-interrupts Controller.");
     machine_class_allow_dynamic_sysbus_dev(mc, TYPE_RAMFB_DEVICE);
     machine_class_allow_dynamic_sysbus_dev(mc, TYPE_UEFI_VARS_SYSBUS);
 #ifdef CONFIG_TPM