Messages in this thread | | | From | Jeremy Fitzhardinge <> | Subject | [PATCH 0/2] x86/microcode: support for microcode update in Xen dom0 | Date | Fri, 28 Jan 2011 16:26:52 -0800 |
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From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Hi all,
I'm proposing this for 2.6.39.
This series adds a new "Xen" microcode update type, in addition to Intel and AMD.
The Xen hypervisor is responsible for performing the actual microcode update (since only it knows what physical CPUs are in the system and has sufficient privilege to access them), but it requires the dom0 kernel to provide the actual microcode update data.
Xen update mechanism is uniform independent of the CPU type, but the driver must know where to find the data file, which depends on the CPU type. And since the update hypercall updates all CPUs, we only need to execute it once on any CPU - but for simplicity it just runs it only on (V)CPU 0.
Thanks, J
Jeremy Fitzhardinge (1): xen: add CPU microcode update driver
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 | 198 ++++++++++++++++++++++++++++++ arch/x86/xen/Kconfig | 4 + include/xen/interface/platform.h | 222 ++++++++++++++++++++++++++++++++++ include/xen/interface/xen.h | 2 + 8 files changed, 448 insertions(+), 1 deletions(-) create mode 100644 arch/x86/kernel/microcode_xen.c create mode 100644 include/xen/interface/platform.h
-- 1.7.3.5
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