[Xen-devel] [RFC PATCH] Scan initramfs for microcode cpio archive. (v1)

[Konrad Rzeszutek Wilk <konrad@xxxxxxxxxx>]

Greetings,

Please see the following patch which implements a mechanism to scan
the initramfs for the format of an microcode files. This is a feature
that the Linux kernel has since v3.10 - where it searches in the
initramfs for an archive of the microcode blob. The format is documented
in the Linux tree and the commit description contains it.

The tool to make this work is the initramfs creator. The author has
provided an RFC patch: 
http://article.gmane.org/gmane.linux.kernel.initramfs/3318
which does that.

That, along with this patch, allows the Xen hypervisor to update the
microcode during bootup. Please review attached RFC patch.


 docs/misc/xen-command-line.markdown |   12 +++
 xen/arch/x86/microcode.c            |  160 ++++++++++++++++++++++++++++++++---
 xen/common/Makefile                 |    2 +-
 xen/common/earlycpio.c              |  151 +++++++++++++++++++++++++++++++++
 xen/include/xen/earlycpio.h         |   15 +++
 5 files changed, 326 insertions(+), 14 deletions(-)
Konrad Rzeszutek Wilk (1):
      microcode: Scan the initramfs payload for microcode blob.


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