[GIT PULL/PATCH 00/27] MPAM driver changes for v7.4

[James Morse]

Hi Catalin, Will,

These are the MPAM driver change for v7.4 to either pick or pull the signed tag.

I don't think the drivers/acpi/arm64/mpam.c change needs an ACK from the ACPI
folk. It only affects the MPAM driver by adding an mpam-fb-id we're expecting
to need in the future. (that whole pattern is to be future proof for DT).

Sudeep originally thought it unnecessary, but after some clarification:
https://lore.kernel.org/linux-arm-kernel/20260924-snobbish-brainy-velociraptor-06bdd4@sudeepholla/


Thanks,

James
---
The following changes since commit eb0fde98fee407118bfcb10e38400494e0699201:

  arm64: mpam: Document when to set arm64.nompam (2026-10-01 17:00:43 +0100)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git tags/mpam/for-next/v7.4_v2

for you to fetch changes up to cb351e3f304b260fc2f11cca5ed819fc9ac7c46d:

  arm_mpam: detect and enable MPAM-Fb PCC support (2026-10-02 18:27:11 +0100)

----------------------------------------------------------------
 - Fix a list of theoretical issues with the driver.
 - Add mailing list and a missing file to MAINTAINERS.
 - Add support for a firmware-backed MPAM interface.

----------------------------------------------------------------

Andre Przywara (13):
  arm_mpam: let low level MSC accessors return an error
  arm_mpam: propagate MSC access errors for hw_probe functions
  arm_mpam: propagate MSC access errors for MBWU counters
  arm_mpam: propagate MSC access errors for msmon helpers
  arm_mpam: propagate MSC access errors for __ris_msmon_read()
  arm_mpam: propagate MSC access errors for state saving function
  arm_mpam: propagate MSC access errors for mpam_reprogram_ris_partid()
  arm_mpam: propagate MSC access errors for interrupt control
  arm_mpam: propagate MSC access errors in mpam_reset_class_locked()
  arm_mpam: prepare mon_sel locking for MPAM-Fb
  arm_mpam: add MPAM-Fb MSC firmware access support
  arm_mpam: change MPAM-Fb error IRQ to use a threaded IRQ handler
  arm_mpam: detect and enable MPAM-Fb PCC support

Ben Horgan (13):
  arm_mpam: Move MPAMF_ECR write helpers to allow reuse
  arm_mpam: Restore the error interrupt enable from mpam_cpu_online()
  arm_mpam: Set mpam_feat_msmon_mbwu_31counter when there are bandwidth
    counters
  arm_mpam: Add missing mon_sel locking in MBWU save and restore
  arm_mpam: Ensure MBWU counters are reset on restore
  arm_mpam: Use __ris_msmon_read() for saving MBWU state
  arm_mpam: Initialize all of struct mon_read in
    mpam_restore_mbwu_state()
  arm_mpam: resctrl: Correct check that existing class is L3
  arm_mpam: resctrl: Make read_mon_cdp_safe() self consistent
  arm_mpam: Don't loop forever if there is the maximum possible amount
    of PARTIDs
  arm_mpam: Switch to kvzmalloc_objs() for allocation of component cfg
  arm_mpam: resctrl: Don't stop early when tearing down a class
  MAINTAINERS: Use linux-arm-kernel list for the MPAM driver

Fuad Tabba (1):
  MAINTAINERS: Add mpam.rst to the MPAM DRIVER entry

 MAINTAINERS                     |    2 +
 drivers/acpi/arm64/mpam.c       |    6 +-
 drivers/resctrl/Kconfig         |    2 +
 drivers/resctrl/Makefile        |    2 +-
 drivers/resctrl/mpam_devices.c  | 1049 +++++++++++++++++++++++--------
 drivers/resctrl/mpam_fb.c       |  258 ++++++++
 drivers/resctrl/mpam_internal.h |   70 ++-
 drivers/resctrl/mpam_resctrl.c  |   13 +-
 include/linux/arm_mpam.h        |    2 +-
 9 files changed, 1104 insertions(+), 300 deletions(-)
 create mode 100644 drivers/resctrl/mpam_fb.c

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2.53.0