From: Shameer Kolothum <skolothumtho@nvidia.com>

No functional changes intended. This will be useful when we
add support for user-creatable smmuv3 device.

Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Nathan Chen <nathanc@nvidia.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Signed-off-by: Shameer Kolothum <skolothumtho@nvidia.com>
Reviewed-by: Donald Dutile <ddutile@redhat.com>
Message-id: 20250829082543.7680-5-skolothumtho@nvidia.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/arm/virt.c | 54 +++++++++++++++++++++++++++------------------------
 1 file changed, 29 insertions(+), 25 deletions(-)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 16a1ac3c2d9..bebe2d8cea9 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1444,19 +1444,43 @@ static void create_pcie_irq_map(const MachineState *ms,
                            0x7           /* PCI irq */);
 }
 
+static void create_smmuv3_dt_bindings(const VirtMachineState *vms, hwaddr base,
+                                      hwaddr size, int irq)
+{
+    char *node;
+    const char compat[] = "arm,smmu-v3";
+    const char irq_names[] = "eventq\0priq\0cmdq-sync\0gerror";
+    MachineState *ms = MACHINE(vms);
+
+    node = g_strdup_printf("/smmuv3@%" PRIx64, base);
+    qemu_fdt_add_subnode(ms->fdt, node);
+    qemu_fdt_setprop(ms->fdt, node, "compatible", compat, sizeof(compat));
+    qemu_fdt_setprop_sized_cells(ms->fdt, node, "reg", 2, base, 2, size);
+
+    qemu_fdt_setprop_cells(ms->fdt, node, "interrupts",
+            GIC_FDT_IRQ_TYPE_SPI, irq    , GIC_FDT_IRQ_FLAGS_EDGE_LO_HI,
+            GIC_FDT_IRQ_TYPE_SPI, irq + 1, GIC_FDT_IRQ_FLAGS_EDGE_LO_HI,
+            GIC_FDT_IRQ_TYPE_SPI, irq + 2, GIC_FDT_IRQ_FLAGS_EDGE_LO_HI,
+            GIC_FDT_IRQ_TYPE_SPI, irq + 3, GIC_FDT_IRQ_FLAGS_EDGE_LO_HI);
+
+    qemu_fdt_setprop(ms->fdt, node, "interrupt-names", irq_names,
+                     sizeof(irq_names));
+
+    qemu_fdt_setprop(ms->fdt, node, "dma-coherent", NULL, 0);
+    qemu_fdt_setprop_cell(ms->fdt, node, "#iommu-cells", 1);
+    qemu_fdt_setprop_cell(ms->fdt, node, "phandle", vms->iommu_phandle);
+    g_free(node);
+}
+
 static void create_smmu(const VirtMachineState *vms,
                         PCIBus *bus)
 {
     VirtMachineClass *vmc = VIRT_MACHINE_GET_CLASS(vms);
-    char *node;
-    const char compat[] = "arm,smmu-v3";
     int irq =  vms->irqmap[VIRT_SMMU];
     int i;
     hwaddr base = vms->memmap[VIRT_SMMU].base;
     hwaddr size = vms->memmap[VIRT_SMMU].size;
-    const char irq_names[] = "eventq\0priq\0cmdq-sync\0gerror";
     DeviceState *dev;
-    MachineState *ms = MACHINE(vms);
 
     if (vms->iommu != VIRT_IOMMU_SMMUV3 || !vms->iommu_phandle) {
         return;
@@ -1475,27 +1499,7 @@ static void create_smmu(const VirtMachineState *vms,
         sysbus_connect_irq(SYS_BUS_DEVICE(dev), i,
                            qdev_get_gpio_in(vms->gic, irq + i));
     }
-
-    node = g_strdup_printf("/smmuv3@%" PRIx64, base);
-    qemu_fdt_add_subnode(ms->fdt, node);
-    qemu_fdt_setprop(ms->fdt, node, "compatible", compat, sizeof(compat));
-    qemu_fdt_setprop_sized_cells(ms->fdt, node, "reg", 2, base, 2, size);
-
-    qemu_fdt_setprop_cells(ms->fdt, node, "interrupts",
-            GIC_FDT_IRQ_TYPE_SPI, irq    , GIC_FDT_IRQ_FLAGS_EDGE_LO_HI,
-            GIC_FDT_IRQ_TYPE_SPI, irq + 1, GIC_FDT_IRQ_FLAGS_EDGE_LO_HI,
-            GIC_FDT_IRQ_TYPE_SPI, irq + 2, GIC_FDT_IRQ_FLAGS_EDGE_LO_HI,
-            GIC_FDT_IRQ_TYPE_SPI, irq + 3, GIC_FDT_IRQ_FLAGS_EDGE_LO_HI);
-
-    qemu_fdt_setprop(ms->fdt, node, "interrupt-names", irq_names,
-                     sizeof(irq_names));
-
-    qemu_fdt_setprop(ms->fdt, node, "dma-coherent", NULL, 0);
-
-    qemu_fdt_setprop_cell(ms->fdt, node, "#iommu-cells", 1);
-
-    qemu_fdt_setprop_cell(ms->fdt, node, "phandle", vms->iommu_phandle);
-    g_free(node);
+    create_smmuv3_dt_bindings(vms, base, size, irq);
 }
 
 static void create_virtio_iommu_dt_bindings(VirtMachineState *vms)
-- 
2.43.0