Re: [PATCH 0/3] bootconfig: Add value override operator

[Steven Rostedt]

On Thu, 16 Jul 2020 01:00:21 +0900
Masami Hiramatsu <mhiramat@xxxxxxxxxx> 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.

-- Steve