Merge tag 'x86_cache_for_v7.2_rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip

Pull x86 resource control updates from Borislav Petkov:
 "Preparatory work for MPAM counter assignment:

   - Simplify the error handling path when creating monitor group event
     configuration directories

   - Make the MBM event filter configurable only on architectures that
     support it and expose this with the respective file modes in the
     event config

   - Disallow the MBA software controller on systems where MBM counters
     are assignable, as it requires continuous bandwidth measurement
     that assignable counters do not guarantee

   - Replace a compile-time Kconfig option for fixed counter assignment
     with a per-architecture runtime property, and expose whether the
     counter assignment mode is changeable to userspace

   - Continue counter allocation across all domains instead of aborting
     at the first failure

   - Document that automatic MBM counter assignment is best effort and
     may not assign counters to all domains

   - Document the behavior of task ID 0 and idle tasks in the resctrl
     tasks file"

* tag 'x86_cache_for_v7.2_rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip:
  fs/resctrl: Document tasks file behaviour for task id 0 and idle tasks
  fs/resctrl: Document that automatic counter assignment is best effort
  fs/resctrl: Continue counter allocation after failure
  fs/resctrl: Add monitor property 'mbm_cntr_assign_fixed'
  fs/resctrl: Disallow the software controller when MBM counters are assignable
  x86,fs/resctrl: Create 'event_filter' files read only if they're not configurable
  fs/resctrl: Tidy up the error path in resctrl_mkdir_event_configs()

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