View source for How to generate an initrd image with Yocto

== How to generate an initramf image with Yocto ==


To build an '''initramfs''', you only need to specify the '''initramfs''' image name (e.g., INITRAMFS_IMAGE) and its type (e.g., INITRAMFS_FSTYPES). 

  INITRAMFS_IMAGE = "core-image-tiny-initramfs"
  INITRAMFS_FSTYPES = "cpio.gz"

Moreover, the kernel requires these features to load and uncompress the initramfs: 

  CONFIG_BLK_DEV_INITRD=y
  CONFIG_INITRAMFS_SOURCE=""
  CONFIG_RD_GZIP=y
  CONFIG_DECOMPRESS_GZIP=y

In addition if you want the initramfs to be packaged into the kernel binary instead of being a separate binary (or a different image node of a kernel fitimage) use this setting:

  INITRAMFS_IMAGE_BUNDLE = "1"