Currently, mkimage options in U-Boot recipes are fixed, which limits flexibility for platforms that require additional mkimage arguments. Introduce FIT_MKIMAGE_EXTRA_OPTS to allow passing extra options to mkimage during image generation.
This is a generic need because different SoCs and boot configurations often require mkimage flags beyond the defaults. By exposing this variable, we provide a clean and extensible mechanism for developers to meet hardware-specific and security requirements without hardcoding options in recipes. Example: UBOOT_MKIMAGE_EXTRA_OPTS = "-B 8 -E" will result in the mkimage command being invoked as: `mkimage -B 8 -E -f fit-image.its fitImage` - `-E` enables external data in FIT images, which is essential for modular boot setups, secure boot workflows, and reducing image size. - `-B 8` enforces 8-byte alignment, ensuring compatibility with boot ROM requirements, improving memory access efficiency, and supporting predictable offsets for multi-component FIT images. Signed-off-by: Kavinaya S <[email protected]> --- meta/classes-recipe/kernel-fit-image.bbclass | 1 + meta/conf/image-fitimage.conf | 3 +++ meta/lib/oe/fitimage.py | 3 +++ 3 files changed, 7 insertions(+) diff --git a/meta/classes-recipe/kernel-fit-image.bbclass b/meta/classes-recipe/kernel-fit-image.bbclass index fd0d21ceee..66c766e90b 100644 --- a/meta/classes-recipe/kernel-fit-image.bbclass +++ b/meta/classes-recipe/kernel-fit-image.bbclass @@ -56,6 +56,7 @@ python do_compile() { d.getVar('HOST_PREFIX'), d.getVar('UBOOT_ARCH'), d.getVar("FIT_CONF_PREFIX"), oe.types.boolean(d.getVar('FIT_KERNEL_SIGN_ENABLE')), d.getVar("FIT_KERNEL_SIGN_KEYDIR"), d.getVar("UBOOT_MKIMAGE"), d.getVar("UBOOT_MKIMAGE_DTCOPTS"), + d.getVar('FIT_MKIMAGE_EXTRA_OPTS'), d.getVar("UBOOT_MKIMAGE_SIGN"), d.getVar("UBOOT_MKIMAGE_SIGN_ARGS"), d.getVar('FIT_HASH_ALG'), d.getVar('FIT_SIGN_ALG'), d.getVar('FIT_PAD_ALG'), d.getVar('FIT_KERNEL_SIGN_KEYNAME'), diff --git a/meta/conf/image-fitimage.conf b/meta/conf/image-fitimage.conf index 090ee148f4..ae1e79ecde 100644 --- a/meta/conf/image-fitimage.conf +++ b/meta/conf/image-fitimage.conf @@ -44,6 +44,9 @@ FIT_SUPPORTED_INITRAMFS_FSTYPES ?= "cpio.lz4 cpio.lzo cpio.lzma cpio.xz cpio.zst # DTBs are provided separately in a FIT image. FIT_LINUX_BIN ?= "linux.bin" +# Additional mkimage options for FIT image creation +FIT_MKIMAGE_EXTRA_OPTS ?= "" + # Allow user to select the default DTB for FIT image when multiple dtb's exists. FIT_CONF_DEFAULT_DTB ?= "" diff --git a/meta/lib/oe/fitimage.py b/meta/lib/oe/fitimage.py index f303799155..bb19d92c8e 100644 --- a/meta/lib/oe/fitimage.py +++ b/meta/lib/oe/fitimage.py @@ -156,6 +156,7 @@ class ItsNodeRootKernel(ItsNode): def __init__(self, description, address_cells, host_prefix, arch, conf_prefix, sign_enable=False, sign_keydir=None, mkimage=None, mkimage_dtcopts=None, + mkimage_extra_opts=None, mkimage_sign=None, mkimage_sign_args=None, hash_algo=None, sign_algo=None, pad_algo=None, sign_keyname_conf=None, @@ -177,6 +178,7 @@ class ItsNodeRootKernel(ItsNode): self._sign_keydir = sign_keydir self._mkimage = mkimage self._mkimage_dtcopts = mkimage_dtcopts + self._mkimage_extra_opts = shlex.split(mkimage_extra_opts) if mkimage_extra_opts else [] self._mkimage_sign = mkimage_sign self._mkimage_sign_args = mkimage_sign_args self._hash_algo = hash_algo @@ -483,6 +485,7 @@ class ItsNodeRootKernel(ItsNode): def run_mkimage_assemble(self, itsfile, fitfile): cmd = [ self._mkimage, + *self._mkimage_extra_opts, '-f', itsfile, fitfile ] -- 2.34.1
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