hw/intc/loongarch_pch_msi: Inject MSI interrupt to kernel

If kvm_irqchip_in_kernel() return true, MSI interrupt can be injected
with API kvm_irqchip_send_msi() to KVM.

Reviewed-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Message-ID: <20250606063033.2557365-7-maobibo@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>

diff --git a/hw/intc/loongarch_pch_msi.c b/hw/intc/loongarch_pch_msi.c
index 06eb944da003e6744d5ce2c87117e32024ab85b1..f6d163158da3ac28c87dd654f7f1487cb3f1be74 100644 (file)
--- a/hw/intc/loongarch_pch_msi.c
+++ b/hw/intc/loongarch_pch_msi.c
@@ -13,6 +13,7 @@
 #include "hw/pci/msi.h"
 #include "hw/misc/unimp.h"
 #include "migration/vmstate.h"
+#include "system/kvm.h"
 #include "trace.h"
 
 static uint64_t loongarch_msi_mem_read(void *opaque, hwaddr addr, unsigned size)
@@ -26,6 +27,15 @@ static void loongarch_msi_mem_write(void *opaque, hwaddr addr,
     LoongArchPCHMSI *s = (LoongArchPCHMSI *)opaque;
     int irq_num;
 
+    if (kvm_irqchip_in_kernel()) {
+        MSIMessage msg;
+
+        msg.address = addr;
+        msg.data = val;
+        kvm_irqchip_send_msi(kvm_state, msg);
+        return;
+    }
+
     /*
      * vector number is irq number from upper extioi intc
      * need subtract irq base to get msi vector offset