[PATCH v2 0/3] perf: marvell: LLC-TAD PMU MPAM filtering support

[Geetha sowjanya]

This series extends the Marvell LLC-TAD PMU driver for CN10K and CN20K
platforms by adding MPAM-based filtering support and introducing CN20K
hardware support.

Patch 1 adds optional MPAM partition-id (partid) filtering for the subset
of events that support it. The partid and partid_en fields are exposed via
the PMU format attribute, while platforms that do not support filtering
continue to expose a reduced event set without these fields.

This patch also includes several fixes and cleanups:
  - Avoid modifying platform_get_resource() bounds in-place
  - Validate the MMIO window size against tad-cnt
  - Correct ordering of perf registration and CPU hotplug with proper unwind
  - Align the filter-enable bit in config1 with the sysfs format (bit 9)

Patch 2 adds support for the CN20K LLC-TAD PMU. Compared to CN10K, CN20K
uses different PFC/PRF register offsets and introduces additional events.
This patch:
  - Adds a CN20K (V3) profile with platform-specific register offsets
  - Extends the event map and hides CN20K-only events on CN10K
  - Implements CN20K-specific MPAM encoding for filtering
  - Ensures correct counter initialization using local64_set(prev_count)
  - Adds device discovery via OF and ACPI (MRVL000F)

Patch 3 updates the Devicetree binding documentation to add support for
"marvell,cn20k-tad-pmu"


Changes since v1
----------------
- config1: use bit 9 for MPAM filter enable consistently with partid_en in
  the PMU format; allow only bits 0..9 in event_init on CN10K/CN20K paths.
- Hide V3-only sysfs events on V1.
- Reset prev_count when starting counters after clearing hardware.
- DT binding: explain non-fallback compatibles for CN10K vs CN20K.

Tanmay Jagdale (1):
  perf: marvell: Add MPAM partid filtering to CN10K TAD PMU

Geetha sowjanya (2):
  perf: marvell: Add CN20K LLC-TAD PMU support
  dt-bindings: perf: marvell: Extend CN10K TAD PMU binding for CN20K

Signed-off-by: Geetha sowjanya <gakula at marvell.com>

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2.25.1