Re: [DistroKit] [PATCH v2 2/4] v8a: kernel: enable initramfs in kernel config

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

On 09.06.23 12:28, Johannes Zink wrote:
> Enable zstd compressed initramfs images for all v8a boards.
> This allows to boot an initrd passed to the bootloader without touching
> the rootfs on a blockdevice.
> 
> Signed-off-by: Johannes Zink <j.zink@pengutronix.de>
> 
> ---
> 
> Changes:
> 
> v1 -> v2:
>  - as gzip generation was dropped in the previous patch, also drop it in
>    the kernel initramfs config. Only zstd is supported for compressed
>    initramfs now.
> ---
>  configs/platform-v8a/kernelconfig | 15 ++++++++++++---
>  1 file changed, 12 insertions(+), 3 deletions(-)
> 
> diff --git a/configs/platform-v8a/kernelconfig b/configs/platform-v8a/kernelconfig
> index 3c0fed78de15..090c50b1dc50 100644
> --- a/configs/platform-v8a/kernelconfig
> +++ b/configs/platform-v8a/kernelconfig
> @@ -205,7 +205,15 @@ CONFIG_NET_NS=y
>  CONFIG_SCHED_AUTOGROUP=y
>  # CONFIG_SYSFS_DEPRECATED is not set
>  # CONFIG_RELAY is not set
> -# CONFIG_BLK_DEV_INITRD is not set
> +CONFIG_BLK_DEV_INITRD=y

Will probably need exception in configs/bsp.ref.

> +CONFIG_INITRAMFS_SOURCE=""
> +# CONFIG_RD_GZIP is not set
> +# CONFIG_RD_BZIP2 is not set
> +# CONFIG_RD_LZMA is not set
> +# CONFIG_RD_XZ is not set
> +# CONFIG_RD_LZO is not set
> +# CONFIG_RD_LZ4 is not set
> +CONFIG_RD_ZSTD=y
>  # CONFIG_BOOT_CONFIG is not set
>  # CONFIG_INITRAMFS_PRESERVE_MTIME is not set
>  CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
> @@ -6163,9 +6171,9 @@ CONFIG_ZLIB_INFLATE=y
>  CONFIG_ZLIB_DEFLATE=y
>  CONFIG_LZO_COMPRESS=m
>  CONFIG_LZO_DECOMPRESS=m
> -CONFIG_ZSTD_COMMON=m
> +CONFIG_ZSTD_COMMON=y
>  CONFIG_ZSTD_COMPRESS=m
> -CONFIG_ZSTD_DECOMPRESS=m
> +CONFIG_ZSTD_DECOMPRESS=y
>  CONFIG_XZ_DEC=y
>  CONFIG_XZ_DEC_X86=y
>  CONFIG_XZ_DEC_POWERPC=y
> @@ -6176,6 +6184,7 @@ CONFIG_XZ_DEC_SPARC=y
>  # CONFIG_XZ_DEC_MICROLZMA is not set
>  CONFIG_XZ_DEC_BCJ=y
>  # CONFIG_XZ_DEC_TEST is not set
> +CONFIG_DECOMPRESS_ZSTD=y
>  CONFIG_GENERIC_ALLOCATOR=y
>  CONFIG_INTERVAL_TREE=y
>  CONFIG_XARRAY_MULTI=y
> 

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