[PATCH 10/15] hw/intc/loongarch_pch: Add irqchip-in-kernel property

[Bibo Mao]

With PCH PCI irqchip, property irqchip-in-kernel is added to indicate
whether feature irqchip_in_kernel is supported or not. This property can
be enabled only if it works in KVM mode.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
---
 hw/intc/loongarch_pch_pic.c         | 14 ++++++++++++++
 include/hw/intc/loongarch_pch_pic.h |  1 +
 2 files changed, 15 insertions(+)

diff --git a/hw/intc/loongarch_pch_pic.c b/hw/intc/loongarch_pch_pic.c
index cbba2fc284..3729ab9700 100644
--- a/hw/intc/loongarch_pch_pic.c
+++ b/hw/intc/loongarch_pch_pic.c
@@ -10,6 +10,8 @@
 #include "qemu/log.h"
 #include "hw/irq.h"
 #include "hw/intc/loongarch_pch_pic.h"
+#include "hw/qdev-properties.h"
+#include "system/kvm.h"
 #include "trace.h"
 #include "qapi/error.h"
 
@@ -264,6 +266,7 @@ static void loongarch_pic_realize(DeviceState *dev, Error 
**errp)
 {
     LoongArchPICCommonState *s = LOONGARCH_PIC_COMMON(dev);
     LoongarchPICClass *lpc = LOONGARCH_PIC_GET_CLASS(dev);
+    LoongarchPICState *lps = LOONGARCH_PIC(dev);
     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
     Error *local_err = NULL;
 
@@ -273,6 +276,11 @@ static void loongarch_pic_realize(DeviceState *dev, Error 
**errp)
         return;
     }
 
+    if (lps->irqchip_in_kernel && !kvm_enabled()) {
+        error_setg(errp, "PCH_PCI irqchip_in_kernel works only in kvm mode");
+        return;
+    }
+
     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),
@@ -281,6 +289,11 @@ static void loongarch_pic_realize(DeviceState *dev, Error 
**errp)
     sysbus_init_mmio(sbd, &s->iomem);
 }
 
+static const Property loongarch_pic_properties[] = {
+    DEFINE_PROP_BOOL("irqchip-in-kernel", LoongarchPICState,
+                     irqchip_in_kernel, false),
+};
+
 static void loongarch_pic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -291,6 +304,7 @@ static void loongarch_pic_class_init(ObjectClass *klass, 
const void *data)
                                        NULL, &lpc->parent_phases);
     device_class_set_parent_realize(dc, loongarch_pic_realize,
                                     &lpc->parent_realize);
+    device_class_set_props(dc, loongarch_pic_properties);
 }
 
 static const TypeInfo loongarch_pic_types[] = {
diff --git a/include/hw/intc/loongarch_pch_pic.h 
b/include/hw/intc/loongarch_pch_pic.h
index 839a59a43b..40fe550c0b 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;
+    bool irqchip_in_kernel;
 };
 
 struct LoongarchPICClass {
-- 
2.39.3