Re: [PATCH v12 12/26] x86/resctrl: Add data structures and definitions for ABMC assignment

Reinette Chatre
2025-04-11T21:01:55Z

Hi Babu,

On 4/3/25 5:18 PM, Babu Moger wrote:
> The ABMC feature provides an option to the user to assign a hardware
> counter to an RMID, event pair and monitor the bandwidth as long as the
> counter is assigned. The bandwidth events will be tracked by the hardware
> until the user changes the configuration. Each resctrl group can configure
> maximum two counters, one for total event and one for local event.
>
> The ABMC feature implements an MSR L3_QOS_ABMC_CFG (C000_03FDh).
> Configuration is done by setting the counter id, bandwidth source (RMID)
> and bandwidth configuration supported by BMEC (Bandwidth Monitoring Event
> Configuration).

Apart from the BMEC optimization in patch #1 and patch #2 this is the
first and only mention of BMEC dependency I see in this series while I do
not see implementation support for this. What am I missing?

Reinette