| Thomas Gleixner | ec8f24b | 2019-05-19 13:07:45 +0100 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0-only |
| Frederic Barrat | b97f022 | 2018-01-23 12:31:45 +0100 | [diff] [blame] | 2 | # |
| 3 | # Open Coherent Accelerator (OCXL) compatible devices |
| 4 | # |
| 5 | |
| 6 | config OCXL_BASE |
| 7 | bool |
| Frederic Barrat | b97f022 | 2018-01-23 12:31:45 +0100 | [diff] [blame] | 8 | select PPC_COPRO_BASE |
| 9 | |
| 10 | config OCXL |
| 11 | tristate "OpenCAPI coherent accelerator support" |
| Linus Torvalds | 96685f8 | 2020-10-16 12:21:15 -0700 | [diff] [blame] | 12 | depends on HOTPLUG_PCI_POWERNV |
| Frederic Barrat | b97f022 | 2018-01-23 12:31:45 +0100 | [diff] [blame] | 13 | select OCXL_BASE |
| Frederic Barrat | b97f022 | 2018-01-23 12:31:45 +0100 | [diff] [blame] | 14 | default m |
| 15 | help |
| 16 | Select this option to enable the ocxl driver for Open |
| 17 | Coherent Accelerator Processor Interface (OpenCAPI) devices. |
| 18 | |
| 19 | OpenCAPI allows FPGA and ASIC accelerators to be coherently |
| 20 | attached to a CPU over an OpenCAPI link. |
| 21 | |
| 22 | The ocxl driver enables userspace programs to access these |
| 23 | accelerators through devices in /dev/ocxl/. |
| 24 | |
| Alexander A. Klimov | 0749713 | 2020-07-13 19:55:06 +0200 | [diff] [blame] | 25 | For more information, see https://opencapi.org. |
| Frederic Barrat | b97f022 | 2018-01-23 12:31:45 +0100 | [diff] [blame] | 26 | |
| 27 | This is not to be confused with the support for IBM CAPI |
| 28 | accelerators (CONFIG_CXL), which are PCI-based instead of a |
| 29 | dedicated OpenCAPI link, and don't follow the same protocol. |
| 30 | |
| 31 | If unsure, say N. |