lkml.org 
[lkml]   [2020]   [Jul]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 0/3] bootconfig: Add value override operator
On Wed, 15 Jul 2020 16:45:04 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:

> On Thu, 16 Jul 2020 01:00:21 +0900
> Masami Hiramatsu <mhiramat@kernel.org> wrote:
>
> > With this change, if the bootloader wants to change some value
> > in the default bootconfig, it doesn't need to parse the existing
> > bootconfig, but it can just append the new configs at the tail
> > of the bootconfig and update the footer (size, checksum and magic
> > word).
>
> I wonder if we should support multiple bootconfigs instead of updating
> the size/checksum/magic?
>
> So the end of the initrd would have:
>
> [data][size/checksum/magic][more-data][size/checksum/magic]
>
>
> And the kernel could do the following:
>
> 1. read the end of the initrd for bootconfig
> 2. If found parse the bootconfig data.
> 3. look at the content before the bootconfig
> 4. if another bootconfig exists, goto 2.
>

Yeah, that is possible. But since the total size of the bootconfig
is limited to 32KB (this means data + 1st footer + more-data),
I would like to give a chance of sanity check to the bootloader.

Thank you,

--
Masami Hiramatsu <mhiramat@kernel.org>

\
 
 \ /
  Last update: 2020-07-16 00:39    [W:0.060 / U:0.104 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site