Function kvm_loongarch_extioi_realize() is added if irqchip-in-kernel
property is enabled. It is to notify KVM kernel to create ExtIOI device
in kernel mode.
Signed-off-by: Bibo Mao <maob...@loongson.cn>
---
hw/intc/loongarch_extioi.c | 4 +++
hw/intc/loongarch_extioi_kvm.c | 46 ++++++++++++++++++++++++++++++
hw/intc/meson.build | 2 ++
include/hw/intc/loongarch_extioi.h | 3 ++
4 files changed, 55 insertions(+)
create mode 100644 hw/intc/loongarch_extioi_kvm.c
diff --git a/hw/intc/loongarch_extioi.c b/hw/intc/loongarch_extioi.c
index a737d49b12..854f54684b 100644
--- a/hw/intc/loongarch_extioi.c
+++ b/hw/intc/loongarch_extioi.c
@@ -376,6 +376,10 @@ static void loongarch_extioi_realize(DeviceState *dev,
Error **errp)
} else {
s->status |= BIT(EXTIOI_ENABLE);
}
+
+ if (kvm_enabled() && les->irqchip_in_kernel) {
+ kvm_loongarch_extioi_realize(dev, errp);
+ }
}
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..833ec856ee
--- /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_loongarch_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 c1d79d0a40..848a01f52c 100644
--- a/include/hw/intc/loongarch_extioi.h
+++ b/include/hw/intc/loongarch_extioi.h
@@ -16,6 +16,7 @@ OBJECT_DECLARE_TYPE(LoongArchExtIOIState,
LoongArchExtIOIClass, LOONGARCH_EXTIOI
struct LoongArchExtIOIState {
LoongArchExtIOICommonState parent_obj;
bool irqchip_in_kernel;
+ int dev_fd;
};
struct LoongArchExtIOIClass {
@@ -26,4 +27,6 @@ struct LoongArchExtIOIClass {
ResettablePhases parent_phases;
};
+void kvm_loongarch_extioi_realize(DeviceState *dev, Error **errp);
+
#endif /* LOONGARCH_EXTIOI_H */
--
2.39.3
