Re: [OE-core] [PATCH v6 10/21] kernel-uboot.bbclass: deploy the vmlinux kernel binary

[Bruce Ashfield <bruce.ashfield@gmail.com>]

In message: [OE-core] [PATCH v6 10/21] kernel-uboot.bbclass: deploy the vmlinux kernel binary
on 02/06/2025 Adrian Freihofer via lists.openembedded.org wrote:

> From: Adrian Freihofer <adrian.freihofer@siemens.com>
> 
> Extend the kernel-uboot.bbclass to build and deploy the kernel binary
> intended for inclusion in a FIT image.
> Note that the kernel used in a FIT image is a stripped (and optionally
> compressed) vmlinux ELF binary - not a self-extracting format like
> zImage, which is already available in the deploy directory if needed
> separately.
> 
> The kernel.bbclass inherits all classes listed in the KERNEL_CLASSES
> variable. By default, KERNEL_CLASSES is defined as:
>   KERNEL_CLASSES ?= " kernel-uimage "
> Since kernel-uimage.bbclass inherits from kernel-uboot.bbclass, the
> creation and deployment of the kernel binary for inclusion in a FIT
> image happens automatically by default.
> 
> Signed-off-by: Adrian Freihofer <adrian.freihofer@siemens.com>
> ---
>  meta/classes-recipe/kernel-uboot.bbclass | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/meta/classes-recipe/kernel-uboot.bbclass b/meta/classes-recipe/kernel-uboot.bbclass
> index d2a63524ece..e26ba6f0aa9 100644
> --- a/meta/classes-recipe/kernel-uboot.bbclass
> +++ b/meta/classes-recipe/kernel-uboot.bbclass
> @@ -56,4 +56,13 @@ uboot_prep_kimage() {
>  	fi
>  
>  	printf "$linux_comp" > "$output_dir/linux_comp"
> -}
> \ No newline at end of file
> +}
> +
> +kernel_do_deploy:append() {
> +	# Provide the kernel artifacts to post processing recipes e.g. for creating a FIT image
> +	uboot_prep_kimage "$deployDir"
> +	# For x86 a setup.bin needs to be include"d in a fitImage as well
> +	if [ -e ${KERNEL_OUTPUT_DIR}/setup.bin ]; then
> +		install -D "${B}/${KERNEL_OUTPUT_DIR}/setup.bin" "$deployDir/"
> +	fi

Isn't this adding extra steps / overhead to a user of kernel-uboot
bbclass that isn't building or using a fitimage ?

Bruce

> +}
> -- 
> 2.49.0
> 

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