1 files changed, 24 insertions, 0 deletions
diff --git a/hw/i386/x86-iommu.c b/hw/i386/x86-iommu.c
index 7440cb8d60..abc3c03158 100644
--- a/hw/i386/x86-iommu.c
+++ b/hw/i386/x86-iommu.c
@@ -53,6 +53,30 @@ void x86_iommu_iec_notify_all(X86IOMMUState *iommu, bool global,
     }
 }
 
+/* Generate one MSI message from VTDIrq info */
+void x86_iommu_irq_to_msi_message(X86IOMMUIrq *irq, MSIMessage *msg_out)
+{
+    X86IOMMU_MSIMessage msg = {};
+
+    /* Generate address bits */
+    msg.dest_mode = irq->dest_mode;
+    msg.redir_hint = irq->redir_hint;
+    msg.dest = irq->dest;
+    msg.__addr_hi = irq->dest & 0xffffff00;
+    msg.__addr_head = cpu_to_le32(0xfee);
+    /* Keep this from original MSI address bits */
+    msg.__not_used = irq->msi_addr_last_bits;
+
+    /* Generate data bits */
+    msg.vector = irq->vector;
+    msg.delivery_mode = irq->delivery_mode;
+    msg.level = 1;
+    msg.trigger_mode = irq->trigger_mode;
+
+    msg_out->address = msg.msi_addr;
+    msg_out->data = msg.msi_data;
+}
+
 /* Default X86 IOMMU device */
 static X86IOMMUState *x86_iommu_default = NULL;