[U-Boot] x86: Booting Linux v4.7+ broken

[Yinghai Lu]

On Tue, Sep 27, 2016 at 2:28 AM, Stefan Roese <sr at denx.de> wrote:
> Hi!
>
> I just tried to boot a recent Linux kernel on a BayTrail based
> x86 board and noticed that booting Linux kernel version v4.7+
> does not work. git bisecting leads to this kernel commit
> changing the compressed image format:
>
> 974f221c:
> x86/boot: Move compressed kernel to the end of the decompression buffer
>
> Before digging deeper into this, I would like to check if
> someone else has been hit by this problem and perhaps already
> has a solution / fix for U-Boots zimage command. Or a quick
> idea how to solve this.
>

could be u-boot does not copy whole setup header that include _init_size.

in kexec the code like:


        /* only copy setup_header */
        setup_header_size = kernel[0x201] + 0x202 - 0x1f1;
        if (setup_header_size > 0x7f)
                setup_header_size = 0x7f;
        memcpy((unsigned char *)real_mode + 0x1f1, kernel + 0x1f1,
                 setup_header_size);