Function kvm_pic_realize() is added if kvm_irqchip_in_kernel() return true.
It is to notify KVM kernel to create and initialize PCH PCI device in
kernel mode.
Signed-off-by: Bibo Mao <maob...@loongson.cn>
---
hw/intc/loongarch_pch_pic.c | 14 ++++++++---
hw/intc/loongarch_pic_kvm.c | 38 +++++++++++++++++++++++++++++
hw/intc/meson.build | 2 ++
include/hw/intc/loongarch_pch_pic.h | 3 +++
4 files changed, 53 insertions(+), 4 deletions(-)
create mode 100644 hw/intc/loongarch_pic_kvm.c
diff --git a/hw/intc/loongarch_pch_pic.c b/hw/intc/loongarch_pch_pic.c
index cbba2fc284..01fe6a1a39 100644
--- a/hw/intc/loongarch_pch_pic.c
+++ b/hw/intc/loongarch_pch_pic.c
@@ -10,6 +10,7 @@
#include "qemu/log.h"
#include "hw/irq.h"
#include "hw/intc/loongarch_pch_pic.h"
+#include "system/kvm.h"
#include "trace.h"
#include "qapi/error.h"
@@ -275,10 +276,15 @@ static void loongarch_pic_realize(DeviceState *dev, Error
**errp)
qdev_init_gpio_out(dev, s->parent_irq, s->irq_num);
qdev_init_gpio_in(dev, pch_pic_irq_handler, s->irq_num);
- memory_region_init_io(&s->iomem, OBJECT(dev),
- &loongarch_pch_pic_ops,
- s, TYPE_LOONGARCH_PIC, VIRT_PCH_REG_SIZE);
- sysbus_init_mmio(sbd, &s->iomem);
+
+ if (kvm_irqchip_in_kernel()) {
+ kvm_pic_realize(dev, errp);
+ } else {
+ memory_region_init_io(&s->iomem, OBJECT(dev),
+ &loongarch_pch_pic_ops,
+ s, TYPE_LOONGARCH_PIC, VIRT_PCH_REG_SIZE);
+ sysbus_init_mmio(sbd, &s->iomem);
+ }
}
static void loongarch_pic_class_init(ObjectClass *klass, const void *data)
diff --git a/hw/intc/loongarch_pic_kvm.c b/hw/intc/loongarch_pic_kvm.c
new file mode 100644
index 0000000000..ee77f04a13
--- /dev/null
+++ b/hw/intc/loongarch_pic_kvm.c
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * LoongArch kvm pch pic interrupt support
+ *
+ * Copyright (C) 2025 Loongson Technology Corporation Limited
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/boards.h"
+#include "hw/intc/loongarch_pch_pic.h"
+#include "hw/loongarch/virt.h"
+#include "hw/pci-host/ls7a.h"
+#include "system/kvm.h"
+
+void kvm_pic_realize(DeviceState *dev, Error **errp)
+{
+ LoongarchPICState *lps = LOONGARCH_PIC(dev);
+ uint64_t pch_pic_base = VIRT_PCH_REG_BASE;
+ int ret;
+
+ ret = kvm_create_device(kvm_state, KVM_DEV_TYPE_LOONGARCH_PCHPIC, false);
+ if (ret < 0) {
+ fprintf(stderr, "Create KVM_LOONGARCH_PCHPIC failed: %s\n",
+ strerror(-ret));
+ abort();
+ }
+
+ lps->dev_fd = ret;
+ ret = kvm_device_access(lps->dev_fd, KVM_DEV_LOONGARCH_PCH_PIC_GRP_CTRL,
+ KVM_DEV_LOONGARCH_PCH_PIC_CTRL_INIT,
+ &pch_pic_base, true, NULL);
+ if (ret < 0) {
+ fprintf(stderr, "KVM_LOONGARCH_PCH_PIC_INIT failed: %s\n",
+ strerror(-ret));
+ abort();
+ }
+}
diff --git a/hw/intc/meson.build b/hw/intc/meson.build
index 1cc999771d..3137521a4a 100644
--- a/hw/intc/meson.build
+++ b/hw/intc/meson.build
@@ -74,6 +74,8 @@ specific_ss.add(when: 'CONFIG_LOONGARCH_IPI', if_true:
files('loongarch_ipi.c'))
specific_ss.add(when: ['CONFIG_KVM', 'CONFIG_LOONGARCH_IPI'],
if_true: files('loongarch_ipi_kvm.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_KVM', 'CONFIG_LOONGARCH_PCH_PIC'],
+ if_true: files('loongarch_pic_kvm.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'],
diff --git a/include/hw/intc/loongarch_pch_pic.h
b/include/hw/intc/loongarch_pch_pic.h
index 839a59a43b..4b52f1165f 100644
--- a/include/hw/intc/loongarch_pch_pic.h
+++ b/include/hw/intc/loongarch_pch_pic.h
@@ -16,6 +16,7 @@ OBJECT_DECLARE_TYPE(LoongarchPICState, LoongarchPICClass,
LOONGARCH_PIC)
struct LoongarchPICState {
LoongArchPICCommonState parent_obj;
+ int dev_fd;
};
struct LoongarchPICClass {
@@ -25,4 +26,6 @@ struct LoongarchPICClass {
ResettablePhases parent_phases;
};
+void kvm_pic_realize(DeviceState *dev, Error **errp);
+
#endif /* HW_LOONGARCH_PCH_PIC_H */
--
2.39.3
