Re: [PATCH] ACPI: Implement overriding of arbitrary ACPI tables via initrd

H. Peter Anvin
2012-03-25T04:18:13Z

On 03/24/2012 03:21 PM, H. Peter Anvin wrote:
> The attached cpio-parsing code compiles to 458 bytes on x86-64 and 476
> bytes on i386, and that is without any library dependencies at all.
> Again, it will completely stop at the first compressed data item, so any
> such kernel objects absolutely will have to be first. In good Linux
> tradition, it is also completely untested.
>
> However, given that very reasonable size I would think that this is a
> reasonable approach. Anyone who has a better suggestion for the
> namespace than "kernel/"?
>

The more I think about it the more I really think this is the right
approach. For microcode, this means we don't have to worry about
creating a super-container for the various microcode formats; we can
simply have:

kernel/x86/microcode/GenuineIntel
kernel/x86/microcode/AuthenticAMD

... which solves the problem neatly.

It does beg the question if you want to be able to have multiple:

kernel/acpi/...

... files, to make managing different tables easier, or is that overkill?

-hpa