riscv: qemu: Enumerate virtio bus during early boot

Currently devices on the virtio bus is not automatically enumerated,
which means peripherals on the virtio bus are not discovered by their
drivers. This uses board_init() to do the virtio enumeration.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

2 files changed, 12 insertions, 0 deletions

diff --git a/board/emulation/qemu-riscv/Kconfig b/board/emulation/qemu-riscv/Kconfig
index af23363fcf..5ae56da764 100644
--- a/board/emulation/qemu-riscv/Kconfig
+++ b/board/emulation/qemu-riscv/Kconfig
@@ -18,5 +18,8 @@ config SYS_TEXT_BASE
 config BOARD_SPECIFIC_OPTIONS # dummy
         def_bool y
         imply SYS_NS16550
+        imply VIRTIO_MMIO
+        imply VIRTIO_NET
+        imply VIRTIO_BLK
 
 endif
diff --git a/board/emulation/qemu-riscv/qemu-riscv.c b/board/emulation/qemu-riscv/qemu-riscv.c
index 041e716c9b..2730a288fb 100644
--- a/board/emulation/qemu-riscv/qemu-riscv.c
+++ b/board/emulation/qemu-riscv/qemu-riscv.c
@@ -4,12 +4,21 @@
  */
 
 #include <common.h>
+#include <dm.h>
 #include <fdtdec.h>
+#include <virtio_types.h>
+#include <virtio.h>
 
 #define MROM_FDT_ADDR   0x1020
 
 int board_init(void)
 {
+        /*
+         * Make sure virtio bus is enumerated so that peripherals
+         * on the virtio bus can be discovered by their drivers
+         */
+        virtio_init();
+
         return 0;
 }