[PATCH v1 00/11] arm_mpam: minor fixes at v7.2

[Ben Horgan]

This is a bunch of small fixes for hypothetical problems in the driver. They
were found by a mixture of messing around with a software model, inspection and
llm review.

The first two patches ensure the error interrupt isn't accidentally disabled
when register state is lost. Patch 3 keeps the feature accounting correct but
has no functional change. Patches 4 to 7 fix mbwu save/restore but this is not
relied on as we plan to just use resctrl assigned counters and these are
unassigned when a domain goes offline. Also, MSC afffinity of a region smaller
than a resctrl domain has not been seen. Patch 8 makes read_mon_cdp_safe()
behaviour the same for cdp_enabled and not. Patch 9 fixes an infinite loop in
a system using all the PARTIDs which is much bigger than anything than anything
I've seen. Patch 10 stops some allocations failing on similiarly big systems.

Based on v7.2-rc2

Ben Horgan (11):
  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 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

 drivers/resctrl/mpam_devices.c | 124 ++++++++++++++++++++-------------
 drivers/resctrl/mpam_resctrl.c |   4 +-
 2 files changed, 76 insertions(+), 52 deletions(-)

-- 
2.43.0