linux-kernel - Re: [PATCH] mips: ralink: allow zboot

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Message-ID: <CACmrr9jTF8RpYh5aztwgNpzC10otnd2UWokyKZX84W+yyODi0w@mail.gmail.com>
Date:   Thu, 21 Mar 2019 08:57:15 -0600
From:   George Hilliard <thirtythreeforty@...il.com>
To:     Paul Burton <paul.burton@...s.com>
Cc:     linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mips: ralink: allow zboot

Actually, I just thought about this: do I need to do a `make
olddefconfig` for all the ralink-based defconfigs to let them choose a
default compression method?  (I'm somewhat new to kernel
contributions, sorry if this is obvious.)

Thanks,
George

On Thu, Mar 21, 2019 at 8:08 AM George Hilliard
<thirtythreeforty@...il.com> wrote:
>
> Architecturally, there's nothing preventing compressed images from
> working.  Bootloaders built with support for the various compression
> methods can decompress and run the kernel.  In practice, many
> bootloaders do not support compressed images, but kernels for those
> boards should just not be compressed.
>
> Tested on an MT7688 with U-Boot doing LZMA decompression of uImage.
>
> Signed-off-by: George Hilliard <thirtythreeforty@...il.com>
> ---
>  arch/mips/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
> index 4a5f5b0ee9a9..b286fbbd9699 100644
> --- a/arch/mips/Kconfig
> +++ b/arch/mips/Kconfig
> @@ -619,6 +619,7 @@ config RALINK
>         select SYS_SUPPORTS_32BIT_KERNEL
>         select SYS_SUPPORTS_LITTLE_ENDIAN
>         select SYS_SUPPORTS_MIPS16
> +       select SYS_SUPPORTS_ZBOOT
>         select SYS_HAS_EARLY_PRINTK
>         select CLKDEV_LOOKUP
>         select ARCH_HAS_RESET_CONTROLLER
> --
> 2.21.0
>