Re: [Xen-devel] [PATCH v2 0/4] Intel Code/Data Prioritization(CDP) feature enabling

[Chao Peng <chao.p.peng@xxxxxxxxxxxxxxx>]

On Wed, Sep 09, 2015 at 01:16:44PM +0800, He Chen wrote:
> Changes in v2:
> - x86: Enable CDP by boot parameter instead of enabling/disabling CDP at
> runtime (suggested by Andrew)

As you added a new boot option, you also need a patch for
docs/misc/xen-command-line.markdown.

Chao
> - tools: remove psr-cat-cdp-enable/disable xl commands
> - code style
> 
> Code/Data Prioritization(CDP) is offered in Intel Broadwell and later server
> platforms, which is an extension of CAT. CDP enables isolation and separate
> prioritization of code and data fetches to the L3 cache in a software
> configurable manner, which can enable workload prioritization and tuning of
> cache capacity to the characteristics of the workload. CDP extends Cache
> Allocation Technology (CAT) by providing separate code and data capacity bit
> masks(CBM) per Class of Service (COS). CDP is used on VM basis in the Xen
> implementation.
> 
> More information about CDP, please refer to Intel SDM, Volumn 3, section 17.16
> http://www.intel.com/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-software-developer-manual-325462.pdf
> 
> This patch series enables CDP feature in Xen based on CAT code, and extends
> CBM operation functions to support CDP. For all the changes, please see in
> each patch.
> 
> This patchset has been tested on Intel Broadwell server platform.
> 
> To make this patchset better, any comment or suggestion is welcomed, I would
> really appreciate it.
> 
> Thanks
> 
> He Chen (4):
>   x86: Support enable CDP by boot parameter and add get CDP status
>   x86: add domctl cmd to set/get CDP code/data CBM
>   tools: add tools support for Intel CDP
>   docs: add document to introduce CDP command
> 
>  docs/man/xl.pod.1               |  14 +++
>  docs/misc/xl-psr.markdown       |  44 +++++++-
>  tools/libxc/include/xenctrl.h   |   7 +-
>  tools/libxc/xc_psr.c            |  17 ++-
>  tools/libxl/libxl.h             |  10 ++
>  tools/libxl/libxl_psr.c         |  32 +++++-
>  tools/libxl/libxl_types.idl     |   3 +
>  tools/libxl/xl.h                |   2 +
>  tools/libxl/xl_cmdimpl.c        |  52 +++++++--
>  tools/libxl/xl_cmdtable.c       |   5 +
>  xen/arch/x86/domctl.c           |  32 +++++-
>  xen/arch/x86/psr.c              | 237 
> ++++++++++++++++++++++++++++++++--------
>  xen/arch/x86/sysctl.c           |   5 +-
>  xen/include/asm-x86/msr-index.h |   3 +
>  xen/include/asm-x86/psr.h       |  23 +++-
>  xen/include/public/domctl.h     |   4 +
>  xen/include/public/sysctl.h     |   2 +
>  17 files changed, 420 insertions(+), 72 deletions(-)
> 
> -- 
> 1.9.1
> 
> 
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> http://lists.xen.org/xen-devel

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