Re: [PATCH v6 27/40] arm_mpam: resctrl: Add monitor initialisation and domain boilerplate

[Gavin Shan]

On 3/14/26 12:46 AM, Ben Horgan wrote:
> Add the boilerplate that tells resctrl about the mpam monitors that are
> available. resctrl expects all (non-telemetry) monitors to be on the L3 and
> so advertise them there and invent an L3 resctrl resource if required. The
> L3 cache itself has to exist as the cache ids are used as the domain
> ids.
>
> Bring the resctrl monitor domains online and offline based on the cpus
> they contain.
>
> Support for specific monitor types is left to later.
>
> Tested-by: Punit Agrawal <punit.agrawal@xxxxxxxxxxxxxxxx>
> Reviewed-by: Zeng Heng <zengheng4@xxxxxxxxxx>
> Reviewed-by: Jonathan Cameron <jonathan.cameron@xxxxxxxxxx>
> Signed-off-by: Ben Horgan <ben.horgan@xxxxxxx>
> ---
> New patch but mostly moved from the existing patches to
> separate the monitors from the controls and the boilerplate
> from the specific counters.
> Use l3->mon_capable in resctrl_arch_mon_capable() as
> resctrl_enable_mon_event() now returns a bool.
>
> Changes since v5:
> Use r->mon_capable instead of resctrl_arch_mon_capable() as specific
> to the resource
> Comment line wrap
> Include offline_ctrl_domain cleanup from controls boilerplate patch
> Include any_mon_comp finding and
> Halve num_rmid when cdp_enabled
> Move mpam_resctrl_get_mon_domain_from_cpu() from boilerplate patch
> ---
>   drivers/resctrl/mpam_internal.h |  15 +++
>   drivers/resctrl/mpam_resctrl.c  | 231 ++++++++++++++++++++++++++++++--
>   2 files changed, 235 insertions(+), 11 deletions(-)

Reviewed-by: Gavin Shan <gshan@xxxxxxxxxx>