Add optee compatible string for dtb to force linux
to boot optee module.

Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>
---
 hw/arm/virt.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 656b008..7d712f3 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1335,6 +1335,22 @@ static void create_platform_bus(VirtMachineState *vms)
                                 sysbus_mmio_get_region(s, 0));
 }
 
+static void create_secure_tee(VirtMachineState *vms)
+{
+    char *firmware;
+    char *optee;
+
+    firmware = g_strdup_printf("/firmware");
+    qemu_fdt_add_subnode(vms->fdt, firmware);
+
+    optee = g_strdup_printf("/firmware/optee");
+    qemu_fdt_add_subnode(vms->fdt, optee);
+    qemu_fdt_setprop_string(vms->fdt, optee, "compatible", "linaro,optee-tz");
+
+    g_free(optee);
+    g_free(firmware);
+}
+
 static void create_secure_ram(VirtMachineState *vms,
                               MemoryRegion *secure_sysmem)
 {
@@ -1720,6 +1736,7 @@ static void machvirt_init(MachineState *machine)
     if (vms->secure) {
         create_secure_ram(vms, secure_sysmem);
         create_uart(vms, VIRT_SECURE_UART, secure_sysmem, serial_hd(1));
+        create_secure_tee(vms);
     }
 
     vms->highmem_ecam &= vms->highmem && (!firmware_loaded || aarch64);
-- 
2.17.1