Re: [Xen-devel] [PATCH v3 0/7] enable Cache QoS Monitoring (CQM) feature

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2013-11-29 at 13:48 +0800, dongxiao.xu@xxxxxxxxx wrote:
> From: Dongxiao Xu <dongxiao.xu@xxxxxxxxx>
> 
> Changes from v2:
>  - Address comments from Andrew Cooper, including:
>    * Merging tools stack changes into one patch.
>    * Reduce the IPI number to one per socket.
>    * Change structures for CQM data exchange between tools and Xen.
>    * Misc of format/variable/function name changes.
>  - Address comments from Konrad Rzeszutek Wilk, including:
>    * Simplify the error printing logic.
>    * Add xsm check for the new added hypercalls.
> 
> Changes from v1:
>  - Address comments from Andrew Cooper, including:
>    * Change function names, e.g., alloc_cqm_rmid(), system_supports_cqm(), 
> etc.
>    * Change some structure element order to save packing cost.
>    * Correct some function's return value.
>    * Some programming styles change.
>    * ...
> 
> Future generations of Intel Xeon processor may offer monitoring capability in
> each logical processor to measure specific quality-of-service metric,
> for example, the Cache QoS Monitoring to get L3 cache occupancy.
> Detailed information please refer to Intel SDM chapter 17.14.

Is this being proposed for 4.4? I think it is rather late to be adding
such stuff.

>  tools/flask/policy/policy/modules/xen/xen.if |    2 +-
>  tools/flask/policy/policy/modules/xen/xen.te |    5 +-
>  tools/libxc/xc_domain.c                      |   48 ++++++
>  tools/libxc/xenctrl.h                        |   12 ++
>  tools/libxl/Makefile                         |    3 +-
>  tools/libxl/libxl.h                          |    5 +
>  tools/libxl/libxl_create.c                   |    3 +
>  tools/libxl/libxl_pqos.c                     |  108 +++++++++++++
>  tools/libxl/libxl_types.idl                  |    1 +
>  tools/libxl/xl.h                             |    3 +
>  tools/libxl/xl_cmdimpl.c                     |  138 ++++++++++++++++
>  tools/libxl/xl_cmdtable.c                    |   15 ++
>  xen/arch/x86/Makefile                        |    1 +
>  xen/arch/x86/cpu/intel.c                     |    6 +
>  xen/arch/x86/domain.c                        |   13 ++
>  xen/arch/x86/domctl.c                        |   40 +++++
>  xen/arch/x86/pqos.c                          |  219 
> ++++++++++++++++++++++++++
>  xen/arch/x86/setup.c                         |    3 +
>  xen/arch/x86/sysctl.c                        |   89 +++++++++++
>  xen/common/domctl.c                          |    5 +-
>  xen/include/asm-x86/cpufeature.h             |    1 +
>  xen/include/asm-x86/domain.h                 |    2 +
>  xen/include/asm-x86/msr-index.h              |    5 +
>  xen/include/asm-x86/pqos.h                   |   46 ++++++
>  xen/include/public/domctl.h                  |   26 +++
>  xen/include/public/sysctl.h                  |   11 ++
>  xen/include/xen/sched.h                      |    3 +
>  xen/xsm/flask/hooks.c                        |    7 +
>  xen/xsm/flask/policy/access_vectors          |   17 +-
>  29 files changed, 830 insertions(+), 7 deletions(-)
>  create mode 100644 tools/libxl/libxl_pqos.c
>  create mode 100644 xen/arch/x86/pqos.c
>  create mode 100644 xen/include/asm-x86/pqos.h
> 



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