Function kvm_dintc_realize() is added if kvm_irqchip_in_kernel is
set. It is to create and initialize DINTC device in kernel mode.
and use kvm_irqchip_send_msi() to send msi to kernel.
Signed-off-by: Song Gao <[email protected]>
---
hw/intc/loongarch_dintc.c | 13 +++++++++
hw/intc/loongarch_dintc_kvm.c | 48 +++++++++++++++++++++++++++++++
hw/intc/meson.build | 2 ++
include/hw/intc/loongarch_dintc.h | 10 +++++++
4 files changed, 73 insertions(+)
create mode 100644 hw/intc/loongarch_dintc_kvm.c
diff --git a/hw/intc/loongarch_dintc.c b/hw/intc/loongarch_dintc.c
index c42a919df4..b8bd7ae015 100644
--- a/hw/intc/loongarch_dintc.c
+++ b/hw/intc/loongarch_dintc.c
@@ -53,6 +53,15 @@ static void loongarch_dintc_mem_write(void *opaque, hwaddr
addr,
cs = cpu_by_arch_id(cpu_num);
irq_num = FIELD_EX64(msg_addr, MSG_ADDR, IRQ_NUM);
+ if (kvm_irqchip_in_kernel()) {
+ MSIMessage msg;
+
+ msg.address = msg_addr;
+ msg.data = val;
+ kvm_irqchip_send_msi(kvm_state, msg);
+ return;
+ }
+
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);
@@ -95,6 +104,10 @@ static void loongarch_dintc_realize(DeviceState *dev, Error
**errp)
qdev_init_gpio_out(dev, &s->cpu[i].parent_irq, 1);
}
+ if (kvm_irqchip_in_kernel()) {
+ kvm_dintc_realize(dev, errp);
+ }
+
return;
}
diff --git a/hw/intc/loongarch_dintc_kvm.c b/hw/intc/loongarch_dintc_kvm.c
new file mode 100644
index 0000000000..1137bcd9a6
--- /dev/null
+++ b/hw/intc/loongarch_dintc_kvm.c
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * LoongArch DINTC interrupt kvm support
+ *
+ * Copyright (C) 2025 Loongson Technology Corporation Limited
+ */
+
+#include "qemu/osdep.h"
+#include "hw/intc/loongarch_dintc.h"
+#include "linux/kvm.h"
+#include "qapi/error.h"
+#include "system/kvm.h"
+
+void kvm_dintc_realize(DeviceState *dev, Error **errp)
+{
+ LoongArchDINTCState *lds = LOONGARCH_DINTC(dev);
+ int ret;
+
+ ret = kvm_create_device(kvm_state, KVM_DEV_TYPE_LOONGARCH_DMSINTC, false);
+ if (ret < 0) {
+ fprintf(stderr, "create KVM_DEV_TYPE_LOONGARCH_AVEC failed: %s\n",
+ strerror(-ret));
+ abort();
+ }
+ lds->dev_fd = ret;
+
+ /* init dintc config */
+ lds->msg_addr_base = VIRT_DINTC_BASE;
+ lds->msg_addr_size = VIRT_DINTC_SIZE;
+
+ ret = kvm_device_access(lds->dev_fd, KVM_DEV_LOONGARCH_DMSINTC_GRP_CTRL,
+ KVM_DEV_LOONGARCH_DMSINTC_MSG_ADDR_BASE,
+ &lds->msg_addr_base, true, NULL);
+ if (ret < 0) {
+ fprintf(stderr, "KVM_DEV_LOONGARCH_DINTC_MSG_ADDR_BASE failed: %s\n",
+ strerror(ret));
+ abort();
+ }
+
+ ret = kvm_device_access(lds->dev_fd, KVM_DEV_LOONGARCH_DMSINTC_GRP_CTRL,
+ KVM_DEV_LOONGARCH_DMSINTC_MSG_ADDR_SIZE,
+ &lds->msg_addr_size, true, NULL);
+ if (ret < 0) {
+ fprintf(stderr, "KVM_DEV_LOONGARCH_DINTC_MSG_ADDR_SIZE failed: %s\n",
+ strerror(ret));
+ abort();
+ }
+}
diff --git a/hw/intc/meson.build b/hw/intc/meson.build
index 96742df090..015c1e67e4 100644
--- a/hw/intc/meson.build
+++ b/hw/intc/meson.build
@@ -82,3 +82,5 @@ specific_ss.add(when: 'CONFIG_LOONGARCH_EXTIOI', if_true:
files('loongarch_extio
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'))
+specific_ss.add(when: ['CONFIG_KVM', 'CONFIG_LOONGARCH_DINTC'],
+ if_true: files('loongarch_dintc_kvm.c'))
diff --git a/include/hw/intc/loongarch_dintc.h
b/include/hw/intc/loongarch_dintc.h
index 1f4f65705a..95a7879e26 100644
--- a/include/hw/intc/loongarch_dintc.h
+++ b/include/hw/intc/loongarch_dintc.h
@@ -9,8 +9,13 @@
#include "hw/core/sysbus.h"
#include "hw/loongarch/virt.h"
#include "system/memory.h"
+#include "hw/pci-host/ls7a.h"
#define NR_VECTORS 256
+#define IRQ_BIT_BASE 5
+#define IRQ_BIT_LEN 8
+#define CPU_BIT_BASE 13
+#define CPU_BIT_LEN 8
#define TYPE_LOONGARCH_DINTC "loongarch_dintc"
OBJECT_DECLARE_TYPE(LoongArchDINTCState, LoongArchDINTCClass, LOONGARCH_DINTC)
@@ -25,7 +30,10 @@ struct LoongArchDINTCState {
SysBusDevice parent_obj;
MemoryRegion dintc_mmio;
DINTCCore *cpu;
+ int dev_fd;
uint32_t num_cpu;
+ uint64_t msg_addr_base;
+ uint64_t msg_addr_size;
};
struct LoongArchDINTCClass {
@@ -34,3 +42,5 @@ struct LoongArchDINTCClass {
DeviceRealize parent_realize;
DeviceUnrealize parent_unrealize;
};
+
+void kvm_dintc_realize(DeviceState *dev, Error **errp);
