Re: [PATCH v6 00/40] arm_mpam: Add KVM/arm64 and resctrl glue code

[Ben Horgan]

Hi Charles,

On 4/3/26 00:38, Rose, Charles wrote:
> Hi Ben,
> 
>> This version of the mpam missing pieces series sees a couple of things
>> dropped or hidden. Memory bandwith utilization with free-running counters
>> is dropped in preference of just always using 'mbm_event' mode (ABMC
>> emulation) which simplifies the code and allows for, in the future,
>> filtering by read/write traffic. So, for the interim, there is no memory
>> bandwidth utilization support. CDP is hidden behind config expert as
>> remount of resctrl fs could potentially lead to out of range PARTIDs being
>> used and the fix requires a change in fs/resctrl. The setting of MPAM2_EL2
>> (for pkvm/nvhe) is dropped as too expensive a write for not much value.
>>
>> There are a couple of 'fixes' at the start of the series which address
>> problems in the base driver but are only user visible due to this series.
>>
> 
> I tested cache occupancy and memory bandwidth allocation on a Dell PowerEdge XE8712 with NVIDIA Grace A02P. Both seem to work as expected.
> 
> For the series:
> 
> Tested-by: Charles Rose <charles.rose@xxxxxxxx>

Thanks for testing!