[PATCH 0/7] ocxl: Implement Power9 as_notify/wait for OpenCAPI

[Alastair D'Silva]

From: Alastair D'Silva <alastair at d-silva.org>

The Power 9 as_notify/wait feature provides a lower latency way to
signal a thread that work is complete. This series enables the use of
this feature from OpenCAPI adapters, as well as addressing a potential
starvation issue when allocating thread IDs.

Alastair D'Silva (7):
  powerpc: Add TIDR CPU feature for Power9
  powerpc: Use TIDR CPU feature to control TIDR allocation
  powerpc: use task_pid_nr() for TID allocation
  ocxl: Rename pnv_ocxl_spa_remove_pe to clarify it's action
  ocxl: Expose the thread_id needed for wait on p9
  ocxl: Add an IOCTL so userspace knows which platform the kernel
    requires
  ocxl: Document new OCXL IOCTLs

 Documentation/accelerators/ocxl.rst   | 10 ++++
 arch/powerpc/include/asm/cputable.h   |  3 +-
 arch/powerpc/include/asm/pnv-ocxl.h   |  2 +-
 arch/powerpc/include/asm/switch_to.h  |  1 -
 arch/powerpc/kernel/dt_cpu_ftrs.c     |  1 +
 arch/powerpc/kernel/process.c         | 99 +----------------------------------
 arch/powerpc/platforms/powernv/ocxl.c |  4 +-
 drivers/misc/ocxl/context.c           |  5 +-
 drivers/misc/ocxl/file.c              | 78 +++++++++++++++++++++++++++
 drivers/misc/ocxl/link.c              | 38 +++++++++++++-
 drivers/misc/ocxl/ocxl_internal.h     |  1 +
 include/misc/ocxl.h                   |  9 ++++
 include/uapi/misc/ocxl.h              | 14 +++++
 13 files changed, 161 insertions(+), 104 deletions(-)

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2.14.3