linux-kernel - [PATCH 0/3] Xen Microcode update driver for 2.6.38

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Date:	Thu, 11 Nov 2010 15:58:03 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Xen-devel <xen-devel@...ts.xensource.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Subject: [PATCH 0/3] Xen Microcode update driver for 2.6.38

From: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>

Hi all,

This series adds a new microcode driver for Xen.  The Xen hypervisor
can deal with all the low-level details of doing a microcode update
(Intel vs AMD, doing all the physical CPUs present on the system,
current and future, etc), so all the driver has to do is make a
hypercall to upload the microcode into Xen.

This only works on a privileged domain, of course.  But the Xen driver
also detects any time we're running paravirtualized under Xen to
prevent any attempts at a microcode update from a non-privileged
domain as well.

Thanks,
	J

Jeremy Fitzhardinge (2):
  xen: add CPU microcode update driver
  xen/microcode: partially enable even for non-privileged kernels

Stephen Tweedie (1):
  xen dom0: Add support for the platform_ops hypercall

 arch/x86/include/asm/microcode.h     |    9 ++
 arch/x86/include/asm/xen/hypercall.h |    8 ++
 arch/x86/kernel/Makefile             |    1 +
 arch/x86/kernel/microcode_core.c     |    5 +-
 arch/x86/kernel/microcode_xen.c      |  201 ++++++++++++++++++++++++++++++
 arch/x86/xen/Kconfig                 |    8 ++
 include/xen/interface/platform.h     |  222 ++++++++++++++++++++++++++++++++++
 include/xen/interface/xen.h          |    2 +
 8 files changed, 455 insertions(+), 1 deletions(-)
 create mode 100644 arch/x86/kernel/microcode_xen.c
 create mode 100644 include/xen/interface/platform.h

-- 
1.7.2.3

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