Re: [Xen-devel] [PATCH v3 0/4] Intel Code and Data Prioritization (CDP) feature enabling

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

On Mon, Sep 14, 2015 at 11:27:03AM +0800, He Chen wrote:
> Changes in v3:
> - x86: remove redundant CDP field in cat_socket_enable (suggested by Chao)
> - tools: simplify CBM setting function in tools (suggested by Jan)
> - docs: Add boot parameter description (suggested by Chao & Ian)
> - code style
> 
> 
> Changes in v2:
> - x86: Enable CDP by boot parameter instead of enabling/disabling CDP at
> runtime (suggested by Andrew)
> - 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

The subject can simply be:
    x86: detect and initialize CDP (Code/Data Prioritization) feature

Chao
>   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/xen-command-line.markdown |   8 +-
>  docs/misc/xl-psr.markdown           |  42 ++++++-
>  tools/libxc/include/xenctrl.h       |   7 +-
>  tools/libxc/xc_psr.c                |  17 ++-
>  tools/libxl/libxl.h                 |   1 +
>  tools/libxl/libxl_psr.c             |  20 ++-
>  tools/libxl/libxl_types.idl         |   3 +
>  tools/libxl/xl_cmdimpl.c            |  49 ++++++--
>  tools/libxl/xl_cmdtable.c           |   3 +
>  xen/arch/x86/domctl.c               |  32 ++++-
>  xen/arch/x86/psr.c                  | 240 
> +++++++++++++++++++++++++++++-------
>  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, 399 insertions(+), 74 deletions(-)
> 
> -- 
> 1.9.1
> 
> 
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