Feature virtual extioi is loongArch virt machine property rather than
vCPU property in qemu side. However it is vCPU property in KVM kernel
side, here add loongArch virt machine property checking and enable virt
extioi feature when vCPU is created.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
---
 target/loongarch/kvm/kvm.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/target/loongarch/kvm/kvm.c b/target/loongarch/kvm/kvm.c
index 9b0ff510fe..c55f6f896c 100644
--- a/target/loongarch/kvm/kvm.c
+++ b/target/loongarch/kvm/kvm.c
@@ -21,6 +21,7 @@
 #include "exec/address-spaces.h"
 #include "hw/boards.h"
 #include "hw/irq.h"
+#include "hw/loongarch/virt.h"
 #include "qemu/log.h"
 #include "hw/loader.h"
 #include "system/runstate.h"
@@ -1023,6 +1024,7 @@ static int kvm_cpu_check_pmu(CPUState *cs, Error **errp)
 
 static int kvm_cpu_check_pv_features(CPUState *cs, Error **errp)
 {
+    MachineState *ms = MACHINE(qdev_get_machine());
     LoongArchCPU *cpu = LOONGARCH_CPU(cs);
     CPULoongArchState *env = cpu_env(cs);
     bool kvm_supported;
@@ -1055,6 +1057,14 @@ static int kvm_cpu_check_pv_features(CPUState *cs, Error **errp)
         env->pv_features |= BIT(KVM_FEATURE_STEAL_TIME);
     }
 
+    if (object_dynamic_cast(OBJECT(ms), TYPE_LOONGARCH_VIRT_MACHINE)) {
+        LoongArchVirtMachineState *lvms = LOONGARCH_VIRT_MACHINE(ms);
+
+        if (lvms->veiointc != ON_OFF_AUTO_OFF) {
+            env->pv_features |= BIT(KVM_FEATURE_VIRT_EXTIOI);
+        }
+    }
+
     return 0;
 }
 
-- 
2.39.3