linux-kernel - Re: [PATCH v11 04/13] x86/cpufeatures: Add Bandwidth Monitoring Event Configuration feature flag

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Message-ID: <7ad9281a-11cb-f656-f7ec-afcfe94e2b11@amd.com>
Date:   Tue, 24 Jan 2023 14:12:18 -0600
From:   "Moger, Babu" <babu.moger@....com>
To:     Reinette Chatre <reinette.chatre@...el.com>,
        Borislav Petkov <bp@...en8.de>
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Subject: Re: [PATCH v11 04/13] x86/cpufeatures: Add Bandwidth Monitoring Event
 Configuration feature flag

Hi Reinette,

On 1/24/23 13:23, Reinette Chatre wrote:
> Hi Babu,
>
> On 1/24/2023 11:03 AM, Moger, Babu wrote:
>> Yes. It is available.  But, the feature BMEC is not explicitly available.
> I think your addition [1] to the resctrl documentation explains
> well how user space can determine which parts of BMEC are available:
>
> 		If the system supports Bandwidth Monitoring Event
> 		Configuration (BMEC), then the bandwidth events will
> 		be configurable. The output will be::
>
> 			# cat /sys/fs/resctrl/info/L3_MON/mon_features
> 			llc_occupancy
> 			mbm_total_bytes
> 			mbm_total_bytes_config
> 			mbm_local_bytes
> 			mbm_local_bytes_config
>
Yes. Sure. That works.

Thank you.

Babu