Re: [PATCH v16 24/32] x86/resctrl: Add energy/perf choices to rdt boot option

[Reinette Chatre]

Hi Tony,

On 12/10/25 3:14 PM, Tony Luck wrote:
> Legacy resctrl features are enumerated by X86_FEATURE_* flags. These may be
> overridden by quirks to disable features in the case of errata.  Users can
> use kernel command line options to either disable a feature, or to force
> enable a feature that was disabled by a quirk.
> 
> A different approach is needed for hardware features that do not have an
> X86_FEATURE_* flag.
> 
> Update parsing of the "rdt=" boot parameter to call the telemetry driver
> directly to handle new "perf" and "energy" options that controls activation
> of telemetry monitoring of the named type. By itself a "perf" or "energy" option
> controls the forced enabling or disabling (with ! prefix) of all event groups of
> the named type. A ":guid" suffix allows for fine grain control per event group.
> 
> Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
> ---

Reviewed-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>

Reinette