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Subject[PATCH v5 0/7] ocxl: Implement Power9 as_notify/wait for OpenCAPI
Date
From: Alastair D'Silva <alastair@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.

Changelog:
v5:
Remove stray brace
Fix bad rename of ocxl_ioctl_platform to ocxl_ioctl_features
v4:
Remove the "unique" statement from the set_thread_tidr function and
move the text explaining why it is safe from the commit message
to the function description
v3:
Fix references to POWER9
Remove stray whitespace edit from docs
Add more details to commit message for "use task_pid_nr()"
Retitle patch 6 to indicate OCXL rather than CPU features
v2:
Rename get_platform IOCTL to get_features
Move stray edit from patch 1 to patch 3

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 POWER9
ocxl: Add an IOCTL so userspace knows what OCXL features are available
ocxl: Document new OCXL IOCTLs

Documentation/accelerators/ocxl.rst | 11 ++++
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 | 101 +---------------------------------
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, 163 insertions(+), 105 deletions(-)

--
2.14.3

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