summary refs log tree commit diff stats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--hw/intc/Kconfig3
-rw-r--r--hw/intc/loongarch_dintc.c212
-rw-r--r--hw/intc/meson.build1
-rw-r--r--hw/loongarch/Kconfig1
-rw-r--r--hw/loongarch/virt.c110
-rw-r--r--include/hw/intc/loongarch_dintc.h36
-rw-r--r--include/hw/loongarch/virt.h34
-rw-r--r--include/hw/pci-host/ls7a.h2
-rw-r--r--target/loongarch/cpu-csr.h9
-rw-r--r--target/loongarch/cpu.c29
-rw-r--r--target/loongarch/cpu.h36
-rw-r--r--target/loongarch/csr.c5
-rw-r--r--target/loongarch/machine.c25
-rw-r--r--target/loongarch/tcg/csr_helper.c21
-rw-r--r--target/loongarch/tcg/helper.h1
-rw-r--r--target/loongarch/tcg/insn_trans/trans_privileged.c.inc1
16 files changed, 499 insertions, 27 deletions
diff --git a/hw/intc/Kconfig b/hw/intc/Kconfig
index 7547528f2c..9f456d7e43 100644
--- a/hw/intc/Kconfig
+++ b/hw/intc/Kconfig
@@ -109,3 +109,6 @@ config LOONGARCH_PCH_MSI
 
 config LOONGARCH_EXTIOI
     bool
+
+config LOONGARCH_DINTC
+    bool
diff --git a/hw/intc/loongarch_dintc.c b/hw/intc/loongarch_dintc.c
new file mode 100644
index 0000000000..dc8f7ffdf6
--- /dev/null
+++ b/hw/intc/loongarch_dintc.c
@@ -0,0 +1,212 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * QEMU LoongArch direct interrupt controller.
+ *
+ * Copyright (C) 2025 Loongson Technology Corporation Limited
+ */
+
+#include "qemu/osdep.h"
+#include "hw/sysbus.h"
+#include "hw/irq.h"
+#include "hw/intc/loongarch_pch_msi.h"
+#include "hw/intc/loongarch_pch_pic.h"
+#include "hw/intc/loongarch_dintc.h"
+#include "hw/pci/msi.h"
+#include "hw/misc/unimp.h"
+#include "migration/vmstate.h"
+#include "trace.h"
+#include "hw/qdev-properties.h"
+#include "target/loongarch/cpu.h"
+#include "qemu/error-report.h"
+#include "system/hw_accel.h"
+
+/* msg addr field */
+FIELD(MSG_ADDR, IRQ_NUM, 4, 8)
+FIELD(MSG_ADDR, CPU_NUM, 12, 8)
+FIELD(MSG_ADDR, FIX, 28, 12)
+
+static uint64_t loongarch_dintc_mem_read(void *opaque,
+                                        hwaddr addr, unsigned size)
+{
+    return 0;
+}
+
+static void do_set_vcpu_dintc_irq(CPUState *cs, run_on_cpu_data data)
+{
+    int irq = data.host_int;
+    CPULoongArchState *env;
+
+    env = &LOONGARCH_CPU(cs)->env;
+    cpu_synchronize_state(cs);
+    set_bit(irq, (unsigned long *)&env->CSR_MSGIS);
+}
+
+static void loongarch_dintc_mem_write(void *opaque, hwaddr addr,
+                                     uint64_t val, unsigned size)
+{
+    int irq_num, cpu_num = 0;
+    LoongArchDINTCState *s = LOONGARCH_DINTC(opaque);
+    uint64_t msg_addr = addr + VIRT_DINTC_BASE;
+    CPUState *cs;
+
+    cpu_num = FIELD_EX64(msg_addr, MSG_ADDR, CPU_NUM);
+    cs = cpu_by_arch_id(cpu_num);
+    irq_num = FIELD_EX64(msg_addr, MSG_ADDR, IRQ_NUM);
+
+    async_run_on_cpu(cs, do_set_vcpu_dintc_irq,
+                         RUN_ON_CPU_HOST_INT(irq_num));
+    qemu_set_irq(s->cpu[cpu_num].parent_irq, 1);
+}
+
+static const MemoryRegionOps loongarch_dintc_ops = {
+    .read = loongarch_dintc_mem_read,
+    .write = loongarch_dintc_mem_write,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+static void loongarch_dintc_realize(DeviceState *dev, Error **errp)
+{
+    LoongArchDINTCState *s = LOONGARCH_DINTC(dev);
+    LoongArchDINTCClass *lac = LOONGARCH_DINTC_GET_CLASS(dev);
+    MachineState *machine = MACHINE(qdev_get_machine());
+    MachineClass *mc = MACHINE_GET_CLASS(machine);
+    const CPUArchIdList  *id_list;
+    int i;
+
+    Error *local_err = NULL;
+    lac->parent_realize(dev, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
+    assert(mc->possible_cpu_arch_ids);
+    id_list = mc->possible_cpu_arch_ids(machine);
+    s->num_cpu = id_list->len;
+    s->cpu = g_new(DINTCCore, s->num_cpu);
+    if (s->cpu == NULL) {
+        error_setg(errp, "Memory allocation for DINTCCore fail");
+        return;
+    }
+
+    for (i = 0; i < s->num_cpu; i++) {
+        s->cpu[i].arch_id = id_list->cpus[i].arch_id;
+        s->cpu[i].cpu = CPU(id_list->cpus[i].cpu);
+        qdev_init_gpio_out(dev, &s->cpu[i].parent_irq, 1);
+    }
+
+    return;
+}
+
+static void loongarch_dintc_unrealize(DeviceState *dev)
+{
+    LoongArchDINTCState *s = LOONGARCH_DINTC(dev);
+    g_free(s->cpu);
+}
+
+static void loongarch_dintc_init(Object *obj)
+{
+    LoongArchDINTCState *s = LOONGARCH_DINTC(obj);
+    SysBusDevice *shd = SYS_BUS_DEVICE(obj);
+    memory_region_init_io(&s->dintc_mmio, OBJECT(s), &loongarch_dintc_ops,
+                          s, TYPE_LOONGARCH_DINTC, VIRT_DINTC_SIZE);
+    sysbus_init_mmio(shd, &s->dintc_mmio);
+    msi_nonbroken = true;
+    return;
+}
+
+static DINTCCore *loongarch_dintc_get_cpu(LoongArchDINTCState *s,
+                                        DeviceState *dev)
+{
+    CPUClass *k = CPU_GET_CLASS(dev);
+    uint64_t arch_id = k->get_arch_id(CPU(dev));
+    int i;
+
+    for (i = 0; i < s->num_cpu; i++) {
+        if (s->cpu[i].arch_id == arch_id) {
+            return &s->cpu[i];
+        }
+    }
+
+    return NULL;
+}
+
+static void loongarch_dintc_cpu_plug(HotplugHandler *hotplug_dev,
+                                   DeviceState *dev, Error **errp)
+{
+    LoongArchDINTCState *s = LOONGARCH_DINTC(hotplug_dev);
+    Object *obj = OBJECT(dev);
+    DINTCCore *core;
+    int index;
+
+    if (!object_dynamic_cast(obj, TYPE_LOONGARCH_CPU)) {
+        warn_report("LoongArch DINTC: Invalid %s device type",
+                                       object_get_typename(obj));
+        return;
+    }
+    core = loongarch_dintc_get_cpu(s, dev);
+    if (!core) {
+        return;
+    }
+
+    core->cpu = CPU(dev);
+    index = core - s->cpu;
+
+    /* connect dintc msg irq to cpu irq */
+    qdev_connect_gpio_out(DEVICE(s), index, qdev_get_gpio_in(dev, INT_DMSI));
+    return;
+}
+
+static void loongarch_dintc_cpu_unplug(HotplugHandler *hotplug_dev,
+                                     DeviceState *dev, Error **errp)
+{
+    LoongArchDINTCState *s = LOONGARCH_DINTC(hotplug_dev);
+    Object *obj = OBJECT(dev);
+    DINTCCore *core;
+
+    if (!object_dynamic_cast(obj, TYPE_LOONGARCH_CPU)) {
+        warn_report("LoongArch DINTC: Invalid %s device type",
+                                       object_get_typename(obj));
+        return;
+    }
+
+    core = loongarch_dintc_get_cpu(s, dev);
+
+    if (!core) {
+        return;
+    }
+
+    core->cpu = NULL;
+}
+
+static void loongarch_dintc_class_init(ObjectClass *klass, const void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
+    LoongArchDINTCClass *lac = LOONGARCH_DINTC_CLASS(klass);
+
+    dc->unrealize = loongarch_dintc_unrealize;
+    device_class_set_parent_realize(dc, loongarch_dintc_realize,
+                                    &lac->parent_realize);
+    hc->plug = loongarch_dintc_cpu_plug;
+    hc->unplug = loongarch_dintc_cpu_unplug;
+}
+
+static const TypeInfo loongarch_dintc_info = {
+    .name          = TYPE_LOONGARCH_DINTC,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(LoongArchDINTCState),
+    .instance_init = loongarch_dintc_init,
+    .class_init    = loongarch_dintc_class_init,
+    .interfaces    = (const InterfaceInfo[]) {
+        { TYPE_HOTPLUG_HANDLER },
+        { }
+    },
+};
+
+static void loongarch_dintc_register_types(void)
+{
+    type_register_static(&loongarch_dintc_info);
+}
+
+type_init(loongarch_dintc_register_types)
diff --git a/hw/intc/meson.build b/hw/intc/meson.build
index 3efb276b6e..faae20b93d 100644
--- a/hw/intc/meson.build
+++ b/hw/intc/meson.build
@@ -80,3 +80,4 @@ specific_ss.add(when: 'CONFIG_LOONGARCH_PCH_MSI', if_true: files('loongarch_pch_
 specific_ss.add(when: 'CONFIG_LOONGARCH_EXTIOI', if_true: files('loongarch_extioi.c', 'loongarch_extioi_common.c'))
 specific_ss.add(when: ['CONFIG_KVM', 'CONFIG_LOONGARCH_EXTIOI'],
                if_true: files('loongarch_extioi_kvm.c'))
+specific_ss.add(when: 'CONFIG_LOONGARCH_DINTC', if_true: files('loongarch_dintc.c'))
diff --git a/hw/loongarch/Kconfig b/hw/loongarch/Kconfig
index bb2838b7b5..8024ddf1f3 100644
--- a/hw/loongarch/Kconfig
+++ b/hw/loongarch/Kconfig
@@ -15,6 +15,7 @@ config LOONGARCH_VIRT
     select LOONGARCH_PCH_PIC
     select LOONGARCH_PCH_MSI
     select LOONGARCH_EXTIOI
+    select LOONGARCH_DINTC
     select LS7A_RTC
     select SMBIOS
     select ACPI_CPU_HOTPLUG
diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c
index bd5cff1f1e..c1760423ee 100644
--- a/hw/loongarch/virt.c
+++ b/hw/loongarch/virt.c
@@ -28,6 +28,7 @@
 #include "hw/intc/loongarch_extioi.h"
 #include "hw/intc/loongarch_pch_pic.h"
 #include "hw/intc/loongarch_pch_msi.h"
+#include "hw/intc/loongarch_dintc.h"
 #include "hw/pci-host/ls7a.h"
 #include "hw/pci-host/gpex.h"
 #include "hw/misc/unimp.h"
@@ -48,6 +49,30 @@
 #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)
 {
@@ -356,13 +381,17 @@ static void virt_cpu_irq_init(LoongArchVirtMachineState *lvms)
                              &error_abort);
         hotplug_handler_plug(HOTPLUG_HANDLER(lvms->extioi), DEVICE(cs),
                              &error_abort);
+	if (lvms->dintc) {
+            hotplug_handler_plug(HOTPLUG_HANDLER(lvms->dintc), DEVICE(cs),
+                                 &error_abort);
+        }
     }
 }
 
 static void virt_irq_init(LoongArchVirtMachineState *lvms)
 {
     DeviceState *pch_pic, *pch_msi;
-    DeviceState *ipi, *extioi;
+    DeviceState *ipi, *extioi, *dintc;
     SysBusDevice *d;
     int i, start, num;
 
@@ -408,6 +437,33 @@ static void virt_irq_init(LoongArchVirtMachineState *lvms)
      *    +--------+ +---------+ +---------+
      *    | UARTs  | | Devices | | Devices |
      *    +--------+ +---------+ +---------+
+     *
+     *
+     *  Advanced Extended IRQ model
+     *
+     *  +-----+     +---------------------------------+     +-------+
+     *  | IPI | --> |        CPUINTC                  | <-- | Timer |
+     *  +-----+     +---------------------------------+     +-------+
+     *                      ^            ^          ^
+     *                      |            |          |
+     *             +-------------+ +----------+ +---------+     +-------+
+     *             |   EIOINTC   | |   DINTC  | | LIOINTC | <-- | UARTs |
+     *             +-------------+ +----------+ +---------+     +-------+
+     *             ^            ^       ^
+     *             |            |       |
+     *        +---------+  +---------+  |
+     *        | PCH-PIC |  | PCH-MSI |  |
+     *        +---------+  +---------+  |
+     *          ^     ^           ^     |
+     *          |     |           |     |
+     *  +---------+ +---------+ +---------+
+     *  | Devices | | PCH-LPC | | Devices |
+     *  +---------+ +---------+ +---------+
+     *                  ^
+     *                  |
+     *             +---------+
+     *             | Devices |
+     *             +---------+
      */
 
     /* Create IPI device */
@@ -415,6 +471,14 @@ static void virt_irq_init(LoongArchVirtMachineState *lvms)
     lvms->ipi = ipi;
     sysbus_realize_and_unref(SYS_BUS_DEVICE(ipi), &error_fatal);
 
+    /* Create DINTC device*/
+    if (virt_has_dmsi(lvms)) {
+        dintc = qdev_new(TYPE_LOONGARCH_DINTC);
+        lvms->dintc = dintc;
+        sysbus_realize_and_unref(SYS_BUS_DEVICE(dintc), &error_fatal);
+        sysbus_mmio_map(SYS_BUS_DEVICE(dintc), 0, VIRT_DINTC_BASE);
+    }
+
     /* Create EXTIOI device */
     extioi = qdev_new(TYPE_LOONGARCH_EXTIOI);
     lvms->extioi = extioi;
@@ -540,6 +604,10 @@ static MemTxResult virt_iocsr_misc_write(void *opaque, hwaddr addr,
             return MEMTX_OK;
         }
 
+        if (virt_has_dmsi(lvms) && val & BIT_ULL(IOCSRM_DMSI_EN)) {
+            lvms->misc_status |= BIT_ULL(IOCSRM_DMSI_EN);
+        }
+
         features = address_space_ldl(&lvms->as_iocsr,
                                      EXTIOI_VIRT_BASE + EXTIOI_VIRT_CONFIG,
                                      attrs, NULL);
@@ -575,6 +643,9 @@ static MemTxResult virt_iocsr_misc_read(void *opaque, hwaddr addr,
         break;
     case FEATURE_REG:
         ret = BIT(IOCSRF_MSI) | BIT(IOCSRF_EXTIOI) | BIT(IOCSRF_CSRIPI);
+        if (virt_has_dmsi(lvms)) {
+            ret |= BIT(IOCSRF_DMSI);
+        }
         if (kvm_enabled()) {
             ret |= BIT(IOCSRF_VM);
         }
@@ -604,6 +675,10 @@ static MemTxResult virt_iocsr_misc_read(void *opaque, hwaddr addr,
         if (features & BIT(EXTIOI_ENABLE_INT_ENCODE)) {
             ret |= BIT_ULL(IOCSRM_EXTIOI_INT_ENCODE);
         }
+        if (virt_has_dmsi(lvms) &&
+            (lvms->misc_status & BIT_ULL(IOCSRM_DMSI_EN))) {
+            ret |= BIT_ULL(IOCSRM_DMSI_EN);
+        }
         break;
     default:
         g_assert_not_reached();
@@ -683,6 +758,25 @@ 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 +811,7 @@ 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 +942,8 @@ 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);
@@ -1010,6 +1107,9 @@ static void virt_cpu_unplug(HotplugHandler *hotplug_dev,
     /* Notify ipi and extioi irqchip to remove interrupt routing to CPU */
     hotplug_handler_unplug(HOTPLUG_HANDLER(lvms->ipi), dev, &error_abort);
     hotplug_handler_unplug(HOTPLUG_HANDLER(lvms->extioi), dev, &error_abort);
+    if (lvms->dintc) {
+        hotplug_handler_unplug(HOTPLUG_HANDLER(lvms->dintc), dev, &error_abort);
+    }
 
     /* Notify acpi ged CPU removed */
     hotplug_handler_unplug(HOTPLUG_HANDLER(lvms->acpi_ged), dev, &error_abort);
@@ -1034,6 +1134,10 @@ static void virt_cpu_plug(HotplugHandler *hotplug_dev,
         hotplug_handler_plug(HOTPLUG_HANDLER(lvms->extioi), dev, &error_abort);
     }
 
+    if (lvms->dintc) {
+        hotplug_handler_plug(HOTPLUG_HANDLER(lvms->dintc), dev, &error_abort);
+    }
+
     if (lvms->acpi_ged) {
         hotplug_handler_plug(HOTPLUG_HANDLER(lvms->acpi_ged), dev,
                              &error_abort);
@@ -1241,6 +1345,10 @@ 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
diff --git a/include/hw/intc/loongarch_dintc.h b/include/hw/intc/loongarch_dintc.h
new file mode 100644
index 0000000000..0b0b5347b2
--- /dev/null
+++ b/include/hw/intc/loongarch_dintc.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * LoongArch  direct interrupt controller definitions
+ *
+ * Copyright (C) 2025 Loongson Technology Corporation Limited
+ */
+
+#include "qom/object.h"
+#include "hw/sysbus.h"
+#include "hw/loongarch/virt.h"
+
+
+#define NR_VECTORS     256
+
+#define TYPE_LOONGARCH_DINTC "loongarch_dintc"
+OBJECT_DECLARE_TYPE(LoongArchDINTCState, LoongArchDINTCClass, LOONGARCH_DINTC)
+
+typedef struct DINTCCore {
+    CPUState *cpu;
+    qemu_irq parent_irq;
+    uint64_t arch_id;
+} DINTCCore;
+
+struct LoongArchDINTCState {
+    SysBusDevice parent_obj;
+    MemoryRegion dintc_mmio;
+    DINTCCore *cpu;
+    uint32_t num_cpu;
+};
+
+struct LoongArchDINTCClass {
+    SysBusDeviceClass parent_class;
+
+    DeviceRealize parent_realize;
+    DeviceUnrealize parent_unrealize;
+};
diff --git a/include/hw/loongarch/virt.h b/include/hw/loongarch/virt.h
index 602feab0f0..cd97bdfb8d 100644
--- a/include/hw/loongarch/virt.h
+++ b/include/hw/loongarch/virt.h
@@ -13,6 +13,27 @@
 #include "hw/block/flash.h"
 #include "hw/loongarch/boot.h"
 
+#define IOCSRF_TEMP             0
+#define IOCSRF_NODECNT          1
+#define IOCSRF_MSI              2
+#define IOCSRF_EXTIOI           3
+#define IOCSRF_CSRIPI           4
+#define IOCSRF_FREQCSR          5
+#define IOCSRF_FREQSCALE        6
+#define IOCSRF_DVFSV1           7
+#define IOCSRF_GMOD             9
+#define IOCSRF_VM               11
+#define IOCSRF_DMSI             15
+
+#define VERSION_REG             0x0
+#define FEATURE_REG             0x8
+#define VENDOR_REG              0x10
+#define CPUNAME_REG             0x20
+#define MISC_FUNC_REG           0x420
+#define IOCSRM_EXTIOI_EN        48
+#define IOCSRM_EXTIOI_INT_ENCODE 49
+#define IOCSRM_DMSI_EN          51
+
 #define LOONGARCH_MAX_CPUS      256
 
 #define VIRT_FWCFG_BASE         0x1e020000UL
@@ -50,6 +71,7 @@ struct LoongArchVirtMachineState {
     Notifier     powerdown_notifier;
     OnOffAuto    acpi;
     OnOffAuto    veiointc;
+    OnOffAuto    dmsi;
     char         *oem_id;
     char         *oem_table_id;
     DeviceState  *acpi_ged;
@@ -65,6 +87,9 @@ struct LoongArchVirtMachineState {
     DeviceState *extioi;
     struct memmap_entry *memmap_table;
     unsigned int memmap_entries;
+    uint64_t misc_feature;
+    uint64_t misc_status;
+    DeviceState *dintc;
 };
 
 #define TYPE_LOONGARCH_VIRT_MACHINE  MACHINE_TYPE_NAME("virt")
@@ -72,6 +97,15 @@ OBJECT_DECLARE_SIMPLE_TYPE(LoongArchVirtMachineState, LOONGARCH_VIRT_MACHINE)
 void virt_acpi_setup(LoongArchVirtMachineState *lvms);
 void virt_fdt_setup(LoongArchVirtMachineState *lvms);
 
+static inline bool virt_has_dmsi(LoongArchVirtMachineState *lvms)
+{
+    if (!(lvms->misc_feature & BIT(IOCSRF_DMSI))) {
+        return false;
+    }
+
+    return true;
+}
+
 static inline bool virt_is_veiointc_enabled(LoongArchVirtMachineState *lvms)
 {
     if (lvms->veiointc == ON_OFF_AUTO_OFF) {
diff --git a/include/hw/pci-host/ls7a.h b/include/hw/pci-host/ls7a.h
index 79d4ea8501..bfdbfe3614 100644
--- a/include/hw/pci-host/ls7a.h
+++ b/include/hw/pci-host/ls7a.h
@@ -24,6 +24,8 @@
 #define VIRT_PCH_REG_BASE        0x10000000UL
 #define VIRT_IOAPIC_REG_BASE     (VIRT_PCH_REG_BASE)
 #define VIRT_PCH_MSI_ADDR_LOW    0x2FF00000UL
+#define VIRT_DINTC_SIZE          0x100000UL
+#define VIRT_DINTC_BASE          0x2FE00000UL
 #define VIRT_PCH_REG_SIZE        0x400
 #define VIRT_PCH_MSI_SIZE        0x8
 
diff --git a/target/loongarch/cpu-csr.h b/target/loongarch/cpu-csr.h
index 0834e91f30..f296eb8d06 100644
--- a/target/loongarch/cpu-csr.h
+++ b/target/loongarch/cpu-csr.h
@@ -34,11 +34,13 @@ FIELD(CSR_MISC, ALCL, 12, 4)
 FIELD(CSR_MISC, DWPL, 16, 3)
 
 #define LOONGARCH_CSR_ECFG           0x4 /* Exception config */
-FIELD(CSR_ECFG, LIE, 0, 13)
+FIELD(CSR_ECFG, LIE, 0, 15)        /* bit 15 is msg interrupt enabled */
+FIELD(CSR_ECFG, MSGINT, 14, 1)
 FIELD(CSR_ECFG, VS, 16, 3)
 
 #define LOONGARCH_CSR_ESTAT          0x5 /* Exception status */
-FIELD(CSR_ESTAT, IS, 0, 13)
+FIELD(CSR_ESTAT, IS, 0, 15)        /* bit 15 is msg interrupt enabled */
+FIELD(CSR_ESTAT, MSGINT, 14, 1)
 FIELD(CSR_ESTAT, ECODE, 16, 6)
 FIELD(CSR_ESTAT, ESUBCODE, 22, 9)
 
@@ -186,6 +188,9 @@ FIELD(CSR_MERRCTL, ISMERR, 0, 1)
 
 #define LOONGARCH_CSR_CTAG           0x98 /* TagLo + TagHi */
 
+#define LOONGARCH_CSR_MSGIS(N)       (0xa0 + N)
+#define LOONGARCH_CSR_MSGIR               0xa4
+
 /* Direct map windows CSRs*/
 #define LOONGARCH_CSR_DMW(N)         (0x180 + N)
 FIELD(CSR_DMW, PLV0, 0, 1)
diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c
index 55ee317bf2..993602fb8c 100644
--- a/target/loongarch/cpu.c
+++ b/target/loongarch/cpu.c
@@ -495,6 +495,25 @@ static void loongarch_set_lasx(Object *obj, bool value, Error **errp)
     cpu->env.cpucfg[2] = FIELD_DP32(val, CPUCFG2, LASX, value);
 }
 
+static bool loongarch_get_msgint(Object *obj, Error **errp)
+{
+    return LOONGARCH_CPU(obj)->msgint != ON_OFF_AUTO_OFF;
+}
+
+static void loongarch_set_msgint(Object *obj, bool value, Error **errp)
+{
+    LoongArchCPU *cpu = LOONGARCH_CPU(obj);
+
+    cpu->msgint = value ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF;
+
+    if (kvm_enabled()) {
+        /* kvm feature detection in function kvm_arch_init_vcpu */
+        return;
+    }
+
+     cpu->env.cpucfg[1] = FIELD_DP32(cpu->env.cpucfg[1], CPUCFG1, MSG_INT, value);
+}
+
 static void loongarch_cpu_post_init(Object *obj)
 {
     LoongArchCPU *cpu = LOONGARCH_CPU(obj);
@@ -507,6 +526,8 @@ static void loongarch_cpu_post_init(Object *obj)
                              loongarch_set_lsx);
     object_property_add_bool(obj, "lasx", loongarch_get_lasx,
                              loongarch_set_lasx);
+    object_property_add_bool(obj, "msgint", loongarch_get_msgint,
+                             loongarch_set_msgint);
     /* lbt is enabled only in kvm mode, not supported in tcg mode */
     if (kvm_enabled()) {
         kvm_loongarch_cpu_post_init(cpu);
@@ -614,6 +635,7 @@ static void loongarch_la464_initfn(Object *obj)
     env->CSR_PRCFG3 = FIELD_DP64(env->CSR_PRCFG3, CSR_PRCFG3, STLB_WAYS, 7);
     env->CSR_PRCFG3 = FIELD_DP64(env->CSR_PRCFG3, CSR_PRCFG3, STLB_SETS, 8);
 
+    cpu->msgint = ON_OFF_AUTO_OFF;
     loongarch_la464_init_csr(obj);
     loongarch_cpu_post_init(obj);
 }
@@ -644,12 +666,19 @@ static void loongarch_la132_initfn(Object *obj)
     data = FIELD_DP32(data, CPUCFG1, HP, 1);
     data = FIELD_DP32(data, CPUCFG1, CRC, 1);
     env->cpucfg[1] = data;
+    cpu->msgint = ON_OFF_AUTO_OFF;
 }
 
 static void loongarch_max_initfn(Object *obj)
 {
+    LoongArchCPU *cpu = LOONGARCH_CPU(obj);
     /* '-cpu max' for TCG: we use cpu la464. */
     loongarch_la464_initfn(obj);
+
+    if (tcg_enabled()) {
+        cpu->env.cpucfg[1] = FIELD_DP32(cpu->env.cpucfg[1], CPUCFG1, MSG_INT, 1);
+        cpu->msgint = ON_OFF_AUTO_AUTO;
+    }
 }
 
 static void loongarch_cpu_reset_hold(Object *obj, ResetType type)
diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h
index c8b96f74dc..b8e3b46c3a 100644
--- a/target/loongarch/cpu.h
+++ b/target/loongarch/cpu.h
@@ -21,27 +21,6 @@
 #include "cpu-csr.h"
 #include "cpu-qom.h"
 
-#define IOCSRF_TEMP             0
-#define IOCSRF_NODECNT          1
-#define IOCSRF_MSI              2
-#define IOCSRF_EXTIOI           3
-#define IOCSRF_CSRIPI           4
-#define IOCSRF_FREQCSR          5
-#define IOCSRF_FREQSCALE        6
-#define IOCSRF_DVFSV1           7
-#define IOCSRF_GMOD             9
-#define IOCSRF_VM               11
-
-#define VERSION_REG             0x0
-#define FEATURE_REG             0x8
-#define VENDOR_REG              0x10
-#define CPUNAME_REG             0x20
-#define MISC_FUNC_REG           0x420
-#define IOCSRM_EXTIOI_EN        48
-#define IOCSRM_EXTIOI_INT_ENCODE 49
-
-#define IOCSR_MEM_SIZE          0x428
-
 #define FCSR0_M1    0x1f         /* FCSR1 mask, Enables */
 #define FCSR0_M2    0x1f1f0000   /* FCSR2 mask, Cause and Flags */
 #define FCSR0_M3    0x300        /* FCSR3 mask, Round Mode */
@@ -238,9 +217,10 @@ FIELD(CSR_CRMD, WE, 9, 1)
 extern const char * const regnames[32];
 extern const char * const fregnames[32];
 
-#define N_IRQS      13
+#define N_IRQS      15
 #define IRQ_TIMER   11
 #define IRQ_IPI     12
+#define INT_DMSI    14
 
 #define LOONGARCH_STLB         2048 /* 2048 STLB */
 #define LOONGARCH_MTLB         64   /* 64 MTLB */
@@ -254,6 +234,13 @@ FIELD(TLB_MISC, ASID, 1, 10)
 FIELD(TLB_MISC, VPPN, 13, 35)
 FIELD(TLB_MISC, PS, 48, 6)
 
+/*Msg interrupt registers */
+#define N_MSGIS                4
+FIELD(CSR_MSGIS, IS, 0, 63)
+FIELD(CSR_MSGIR, INTNUM, 0, 8)
+FIELD(CSR_MSGIR, ACTIVE, 31, 1)
+FIELD(CSR_MSGIE, PT, 0, 8)
+
 #define LSX_LEN    (128)
 #define LASX_LEN   (256)
 
@@ -371,6 +358,10 @@ typedef struct CPUArchState {
     uint64_t CSR_DBG;
     uint64_t CSR_DERA;
     uint64_t CSR_DSAVE;
+    /* Msg interrupt registers */
+    uint64_t CSR_MSGIS[N_MSGIS];
+    uint64_t CSR_MSGIR;
+    uint64_t CSR_MSGIE;
     struct {
         uint64_t guest_addr;
     } stealtime;
@@ -413,6 +404,7 @@ struct ArchCPU {
     OnOffAuto pmu;
     OnOffAuto lsx;
     OnOffAuto lasx;
+    OnOffAuto msgint;
     OnOffAuto kvm_pv_ipi;
     OnOffAuto kvm_steal_time;
     int32_t socket_id;  /* socket-id of this CPU */
diff --git a/target/loongarch/csr.c b/target/loongarch/csr.c
index 7ea0a30450..f973780bba 100644
--- a/target/loongarch/csr.c
+++ b/target/loongarch/csr.c
@@ -97,6 +97,11 @@ static CSRInfo csr_info[] = {
     CSR_OFF(DBG),
     CSR_OFF(DERA),
     CSR_OFF(DSAVE),
+    CSR_OFF_ARRAY(MSGIS, 0),
+    CSR_OFF_ARRAY(MSGIS, 1),
+    CSR_OFF_ARRAY(MSGIS, 2),
+    CSR_OFF_ARRAY(MSGIS, 3),
+    CSR_OFF(MSGIR),
 };
 
 CSRInfo *get_csr(unsigned int csr_num)
diff --git a/target/loongarch/machine.c b/target/loongarch/machine.c
index 4e70f5c879..73190fb367 100644
--- a/target/loongarch/machine.c
+++ b/target/loongarch/machine.c
@@ -45,6 +45,26 @@ static const VMStateDescription vmstate_fpu = {
     },
 };
 
+static bool msgint_needed(void *opaque)
+{
+    LoongArchCPU *cpu = opaque;
+
+    return FIELD_EX64(cpu->env.cpucfg[1], CPUCFG1, MSG_INT);
+}
+
+static const VMStateDescription vmstate_msgint = {
+    .name = "cpu/msgint",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = msgint_needed,
+    .fields = (const VMStateField[]) {
+        VMSTATE_UINT64_ARRAY(env.CSR_MSGIS, LoongArchCPU, N_MSGIS),
+        VMSTATE_UINT64(env.CSR_MSGIR, LoongArchCPU),
+        VMSTATE_UINT64(env.CSR_MSGIE, LoongArchCPU),
+        VMSTATE_END_OF_LIST()
+    },
+};
+
 static const VMStateDescription vmstate_lsxh_reg = {
     .name = "lsxh_reg",
     .version_id = 1,
@@ -168,8 +188,8 @@ static const VMStateDescription vmstate_tlb = {
 /* LoongArch CPU state */
 const VMStateDescription vmstate_loongarch_cpu = {
     .name = "cpu",
-    .version_id = 3,
-    .minimum_version_id = 3,
+    .version_id = 4,
+    .minimum_version_id = 4,
     .fields = (const VMStateField[]) {
         VMSTATE_UINTTL_ARRAY(env.gpr, LoongArchCPU, 32),
         VMSTATE_UINTTL(env.pc, LoongArchCPU),
@@ -245,6 +265,7 @@ const VMStateDescription vmstate_loongarch_cpu = {
         &vmstate_tlb,
 #endif
         &vmstate_lbt,
+        &vmstate_msgint,
         NULL
     }
 };
diff --git a/target/loongarch/tcg/csr_helper.c b/target/loongarch/tcg/csr_helper.c
index 0d99e2c92b..7bfe6c6c0c 100644
--- a/target/loongarch/tcg/csr_helper.c
+++ b/target/loongarch/tcg/csr_helper.c
@@ -73,6 +73,27 @@ target_ulong helper_csrrd_tval(CPULoongArchState *env)
     return cpu_loongarch_get_constant_timer_ticks(cpu);
 }
 
+target_ulong helper_csrrd_msgir(CPULoongArchState *env)
+{
+    int irq, new;
+
+    irq = find_first_bit((unsigned long *)env->CSR_MSGIS, 256);
+    if (irq < 256) {
+        clear_bit(irq, (unsigned long *)env->CSR_MSGIS);
+        new = find_first_bit((unsigned long *)env->CSR_MSGIS, 256);
+        if (new < 256) {
+            return irq;
+        }
+
+        env->CSR_ESTAT = FIELD_DP64(env->CSR_ESTAT, CSR_ESTAT, MSGINT, 0);
+    } else {
+        /* bit 31 set 1 for no invalid irq */
+        irq = BIT(31);
+    }
+
+    return irq;
+}
+
 target_ulong helper_csrwr_estat(CPULoongArchState *env, target_ulong val)
 {
     int64_t old_v = env->CSR_ESTAT;
diff --git a/target/loongarch/tcg/helper.h b/target/loongarch/tcg/helper.h
index 1d5cb0198c..db57dbfc16 100644
--- a/target/loongarch/tcg/helper.h
+++ b/target/loongarch/tcg/helper.h
@@ -100,6 +100,7 @@ DEF_HELPER_1(rdtime_d, i64, env)
 DEF_HELPER_1(csrrd_pgd, i64, env)
 DEF_HELPER_1(csrrd_cpuid, i64, env)
 DEF_HELPER_1(csrrd_tval, i64, env)
+DEF_HELPER_1(csrrd_msgir, i64, env)
 DEF_HELPER_2(csrwr_stlbps, i64, env, tl)
 DEF_HELPER_2(csrwr_estat, i64, env, tl)
 DEF_HELPER_2(csrwr_asid, i64, env, tl)
diff --git a/target/loongarch/tcg/insn_trans/trans_privileged.c.inc b/target/loongarch/tcg/insn_trans/trans_privileged.c.inc
index 34cfab8879..a407ab51b7 100644
--- a/target/loongarch/tcg/insn_trans/trans_privileged.c.inc
+++ b/target/loongarch/tcg/insn_trans/trans_privileged.c.inc
@@ -83,6 +83,7 @@ void loongarch_csr_translate_init(void)
     SET_CSR_FUNC(TCFG,  NULL, gen_helper_csrwr_tcfg);
     SET_CSR_FUNC(TVAL,  gen_helper_csrrd_tval, NULL);
     SET_CSR_FUNC(TICLR, NULL, gen_helper_csrwr_ticlr);
+    SET_CSR_FUNC(MSGIR, gen_helper_csrrd_msgir, NULL);
 }
 #undef SET_CSR_FUNC