Re: [Xen-devel] [PATCH v5 21/24] tools: L2 CAT: support get HW info for L2 CAT.

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On Wed, 2017-01-18 at 10:02 +0800, Yi Sun wrote:
> This patch implements xl/xc changes to support get HW info
> for L2 CAT.
> 
> 'xl psr-hwinfo' is updated to show both L3 CAT and L2 CAT
> info.
> 
> Example(on machine which only supports L2 CAT):
> Cache Monitoring Technology (CMT):
> Enabled         : 0
> Cache Allocation Technology (CAT): L3
> libxl: error: libxl_psr.c:100:libxl__psr_cat_log_err_msg: CAT is not
> enabled on the socket: No such file or directory
> Failed to get l3 cat info
> Cache Allocation Technology (CAT): L2
> Socket ID       : 0
> Maximum COS     : 3
> CBM length      : 8
> Default CBM     : 0xff
>
I think we settled, in v4, for not having this awkward error message
showing itself in this way "only" because of (legitimate!) lack of
hardware support for some of the features?

https://lists.xenproject.org/archives/html/xen-devel/2017-01/msg00604.html
https://lists.xenproject.org/archives/html/xen-devel/2017-01/msg00792.html
https://lists.xenproject.org/archives/html/xen-devel/2017-01/msg00797.html

Nevertheless, I've had a look at the code, and it looks good to me.

Regards,
Dario
-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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