Function kvm_extioi_realize() is added if kvm_irqchip_in_kernel is
set. It is to create and initialize ExtIOI device in kernel mode.
Signed-off-by: Bibo Mao <maob...@loongson.cn>
---
hw/intc/loongarch_extioi.c | 31 ++++++++++++--------
hw/intc/loongarch_extioi_kvm.c | 46 ++++++++++++++++++++++++++++++
hw/intc/meson.build | 2 ++
include/hw/intc/loongarch_extioi.h | 3 ++
4 files changed, 70 insertions(+), 12 deletions(-)
create mode 100644 hw/intc/loongarch_extioi_kvm.c
diff --git a/hw/intc/loongarch_extioi.c b/hw/intc/loongarch_extioi.c
index 7c38c4c9b7..837f649d6c 100644
--- a/hw/intc/loongarch_extioi.c
+++ b/hw/intc/loongarch_extioi.c
@@ -12,6 +12,7 @@
#include "hw/irq.h"
#include "hw/loongarch/virt.h"
#include "system/address-spaces.h"
+#include "system/kvm.h"
#include "hw/intc/loongarch_extioi.h"
#include "trace.h"
@@ -351,23 +352,29 @@ static void loongarch_extioi_realize(DeviceState *dev,
Error **errp)
return;
}
- for (i = 0; i < EXTIOI_IRQS; i++) {
- sysbus_init_irq(sbd, &s->irq[i]);
- }
-
- qdev_init_gpio_in(dev, extioi_setirq, EXTIOI_IRQS);
- memory_region_init_io(&s->extioi_system_mem, OBJECT(s), &extioi_ops,
- s, "extioi_system_mem", 0x900);
- sysbus_init_mmio(sbd, &s->extioi_system_mem);
-
if (s->features & BIT(EXTIOI_HAS_VIRT_EXTENSION)) {
- memory_region_init_io(&s->virt_extend, OBJECT(s), &extioi_virt_ops,
- s, "extioi_virt", EXTIOI_VIRT_SIZE);
- sysbus_init_mmio(sbd, &s->virt_extend);
s->features |= EXTIOI_VIRT_HAS_FEATURES;
} else {
s->status |= BIT(EXTIOI_ENABLE);
}
+
+ if (kvm_irqchip_in_kernel()) {
+ kvm_extioi_realize(dev, errp);
+ } else {
+ for (i = 0; i < EXTIOI_IRQS; i++) {
+ sysbus_init_irq(sbd, &s->irq[i]);
+ }
+
+ qdev_init_gpio_in(dev, extioi_setirq, EXTIOI_IRQS);
+ memory_region_init_io(&s->extioi_system_mem, OBJECT(s), &extioi_ops,
+ s, "extioi_system_mem", 0x900);
+ sysbus_init_mmio(sbd, &s->extioi_system_mem);
+ if (s->features & BIT(EXTIOI_HAS_VIRT_EXTENSION)) {
+ memory_region_init_io(&s->virt_extend, OBJECT(s), &extioi_virt_ops,
+ s, "extioi_virt", EXTIOI_VIRT_SIZE);
+ sysbus_init_mmio(sbd, &s->virt_extend);
+ }
+ }
}
static void loongarch_extioi_unrealize(DeviceState *dev)
diff --git a/hw/intc/loongarch_extioi_kvm.c b/hw/intc/loongarch_extioi_kvm.c
new file mode 100644
index 0000000000..e6d5dd379a
--- /dev/null
+++ b/hw/intc/loongarch_extioi_kvm.c
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * LoongArch EXTIOI interrupt kvm support
+ *
+ * Copyright (C) 2025 Loongson Technology Corporation Limited
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/typedefs.h"
+#include "hw/intc/loongarch_extioi.h"
+#include "linux/kvm.h"
+#include "qapi/error.h"
+#include "system/kvm.h"
+
+void kvm_extioi_realize(DeviceState *dev, Error **errp)
+{
+ LoongArchExtIOICommonState *lecs = LOONGARCH_EXTIOI_COMMON(dev);
+ LoongArchExtIOIState *les = LOONGARCH_EXTIOI(dev);
+ int ret;
+
+ ret = kvm_create_device(kvm_state, KVM_DEV_TYPE_LOONGARCH_EIOINTC, false);
+ if (ret < 0) {
+ fprintf(stderr, "create KVM_LOONGARCH_EIOINTC failed: %s\n",
+ strerror(-ret));
+ abort();
+ }
+
+ les->dev_fd = ret;
+ ret = kvm_device_access(les->dev_fd, KVM_DEV_LOONGARCH_EXTIOI_GRP_CTRL,
+ KVM_DEV_LOONGARCH_EXTIOI_CTRL_INIT_NUM_CPU,
+ &lecs->num_cpu, true, NULL);
+ if (ret < 0) {
+ fprintf(stderr, "KVM_LOONGARCH_EXTIOI_INIT_NUM_CPU failed: %s\n",
+ strerror(-ret));
+ abort();
+ }
+
+ ret = kvm_device_access(les->dev_fd, KVM_DEV_LOONGARCH_EXTIOI_GRP_CTRL,
+ KVM_DEV_LOONGARCH_EXTIOI_CTRL_INIT_FEATURE,
+ &lecs->features, true, NULL);
+ if (ret < 0) {
+ fprintf(stderr, "KVM_LOONGARCH_EXTIOI_INIT_FEATURE failed: %s\n",
+ strerror(-ret));
+ abort();
+ }
+}
diff --git a/hw/intc/meson.build b/hw/intc/meson.build
index 602da304b0..70e7548c52 100644
--- a/hw/intc/meson.build
+++ b/hw/intc/meson.build
@@ -74,3 +74,5 @@ specific_ss.add(when: 'CONFIG_LOONGARCH_IPI', if_true:
files('loongarch_ipi.c'))
specific_ss.add(when: 'CONFIG_LOONGARCH_PCH_PIC', if_true:
files('loongarch_pch_pic.c', 'loongarch_pic_common.c'))
specific_ss.add(when: 'CONFIG_LOONGARCH_PCH_MSI', if_true:
files('loongarch_pch_msi.c'))
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'))
diff --git a/include/hw/intc/loongarch_extioi.h
b/include/hw/intc/loongarch_extioi.h
index 4a6ae903e9..69565e14ab 100644
--- a/include/hw/intc/loongarch_extioi.h
+++ b/include/hw/intc/loongarch_extioi.h
@@ -15,6 +15,7 @@ OBJECT_DECLARE_TYPE(LoongArchExtIOIState,
LoongArchExtIOIClass, LOONGARCH_EXTIOI
struct LoongArchExtIOIState {
LoongArchExtIOICommonState parent_obj;
+ int dev_fd;
};
struct LoongArchExtIOIClass {
@@ -25,4 +26,6 @@ struct LoongArchExtIOIClass {
ResettablePhases parent_phases;
};
+void kvm_extioi_realize(DeviceState *dev, Error **errp);
+
#endif /* LOONGARCH_EXTIOI_H */
--
2.39.3
