hw/riscv/virt: Add serial alias in DTB

Add an "aliases" node with a "serial0" entry for the single UART
in the riscv virt machine.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2774
Signed-off-by: Vasilis Liaskovitis <vliaskovitis@suse.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20250116161007.39710-1-vliaskovitis@suse.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 241389d72f8a25898543c299452a9f064207f6de..dae46f4733cd59bfeb4d0eef29f8cb617bd472a8 100644 (file)
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -971,6 +971,7 @@ static void create_fdt_uart(RISCVVirtState *s, const MemMapEntry *memmap,
     }
 
     qemu_fdt_setprop_string(ms->fdt, "/chosen", "stdout-path", name);
+    qemu_fdt_setprop_string(ms->fdt, "/aliases", "serial0", name);
 }
 
 static void create_fdt_rtc(RISCVVirtState *s, const MemMapEntry *memmap,
@@ -1180,6 +1181,8 @@ static void create_fdt(RISCVVirtState *s, const MemMapEntry *memmap)
     qemu_fdt_setprop(ms->fdt, "/chosen", "rng-seed",
                      rng_seed, sizeof(rng_seed));
 
+    qemu_fdt_add_subnode(ms->fdt, "/aliases");
+
     create_fdt_flash(s, memmap);
     create_fdt_fw_cfg(s, memmap);
     create_fdt_pmu(s);