The Linux kernel SiFive UART driver expects an aliases node to be
present in the device tree, from which the driver extracts the port
number from "serial#" in the aliases node.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
---

 hw/riscv/sifive_u.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c
index 061d6d4..9945b82 100644
--- a/hw/riscv/sifive_u.c
+++ b/hw/riscv/sifive_u.c
@@ -283,6 +283,8 @@ static void create_fdt(SiFiveUState *s, const struct MemmapEntry *memmap,
     if (cmdline) {
         qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline);
     }
+    qemu_fdt_add_subnode(fdt, "/aliases");
+    qemu_fdt_setprop_string(fdt, "/aliases", "serial0", nodename);
     g_free(nodename);
 }
 
-- 
2.7.4