On 08/30/2012 02:29 AM, Thomas Renninger wrote:
From: "H. Peter Anvin" <hpa@xxxxxxxxxxxxxxx> Add a simple cpio decoder without library dependencies for the purpose of extracting components from the initramfs blob for early kernel uses. Intended consumers so far are microcode and ACPI override. Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx> CC: Thomas Renninger <trenn@xxxxxxx> Link: http://lkml.kernel.org/r/201203261651.29640.trenn@xxxxxxx Signed-off-by: Thomas Renninger <trenn@xxxxxxx>
I was trying to figure out if there is a way to do what you want (support for multiple files) without the problems of the callback interface. I think it is actually fairly straightforward; we need a prefix iterator (so you can give it a string like "kernel/acpi/" rather than a full filename) and it needs to be able to accept a "last" pointer so it can resume scanning at the point it last left off. That should be a pretty trivial change.
The other thing we presumably want to do -- and this is generic -- is to be able to handle multiple sources for the initramfs; at the very least there is built in vs provided from the boot loader. I had originally intended to just handle that by calling the earlycpio function once per block, but the "last left off" bit makes that a little harder. Need to think about that a little bit.
I am guessing that this may not need to be something we need from the very beginning, or am I wrong?
-hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
