rpmb: add virtio rpmb support

The RPMB partition cannot be accessed via standard block layer, but by a set of specific commands: WRITE, READ, GET_WRITE_COUNTER, and PROGRAM_KEY. Such a partition provides authenticated and replay protected access, hence suitable as a secure storage.

Signed-off-by: wanggang26 <wanggang26@xiaomi.com>

drivers/virtio/Make.defs

@@ -48,6 +48,10 @@ ifeq ($(CONFIG_DRIVERS_VIRTIO_RNG),y)
   CSRCS += virtio-rng.c
 endif
 
+ifeq ($(CONFIG_DRIVERS_VIRTIO_RPMB),y)
+  CSRCS += virtio-rpmb.c
+endif
+
 ifeq ($(CONFIG_DRIVERS_VIRTIO_SERIAL),y)
   CSRCS += virtio-serial.c
 endif
@@ -55,6 +59,7 @@ endif
 ifeq ($(CONFIG_DRIVERS_VIRTIO_SOUND),y)
   CSRCS += virtio-snd.c
 endif
+
 # Include build support
 
 DEPPATH += --dep-path virtio