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From:   George Hilliard <thirtythreeforty@gmail.com>
Date:   Thu, 21 Mar 2019 17:10:38 -0600
Message-ID: <CACmrr9hj6A_ZgbgO=bHuueav1FEc4jQ2-T9ddASa61Qe4mKR9g@mail.gmail.com>
Subject: Re: [RESEND PATCH] mips: ralink: allow zboot
To:     Aaro Koskinen <aaro.koskinen@iki.fi>
Cc:     Paul Burton <paul.burton@mips.com>, linux-mips@vger.kernel.org,
        linux-kernel@vger.kernel.org
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My version of U-Boot complains if I compile out LZMA support:
---
=> tftpboot 0x81000000 uImage; tftpboot 0x84000000 hawkeye.dtb; bootm
0x81000000 - 0x84000000
(snip)
Bytes transferred = 7349 (1cb5 hex)
## Booting kernel from Legacy Image at 81000000 ...
   Image Name:   Linux-5.1.0-rc1
   Image Type:   MIPS Linux Kernel Image (lzma compressed)
   Data Size:    1465871 Bytes = 1.4 MiB
   Load Address: 80000000
   Entry Point:  80344338
   Verifying Checksum ... OK
## Flattened Device Tree blob at 84000000
   Booting using the fdt blob at 0x84000000
   Uncompressing Kernel Image ... Unimplemented compression type 3
exit not allowed from main input shell.
=>
---

Thanks,
George

On Thu, Mar 21, 2019 at 4:56 PM Aaro Koskinen <aaro.koskinen@iki.fi> wrote:
>
> Hi,
>
> On Thu, Mar 21, 2019 at 11:03:34AM -0600, George Hilliard 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.
>
> With zboot the decompressor is included in the image so no bootloader
> support is needed.
>
> A.