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| author | Nipun Gupta <nipun.gupta@amd.com> | 2023-03-13 18:56:30 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-29 12:26:32 +0200 |
| commit | 2959ab247061e67485d83b6af8feb3761ec08cb9 (patch) | |
| tree | 833d78510e724d5e12d96aa72fb9ce0409a030f5 /Documentation | |
| parent | 71d74aaa15b49d2ea6927706ee2a7debc88fe3c2 (diff) | |
| download | linux-stable-2959ab247061e67485d83b6af8feb3761ec08cb9.tar.gz linux-stable-2959ab247061e67485d83b6af8feb3761ec08cb9.tar.bz2 linux-stable-2959ab247061e67485d83b6af8feb3761ec08cb9.zip | |
cdx: add the cdx bus driver
Introduce AMD CDX bus, which provides a mechanism for scanning
and probing CDX devices. These devices are memory mapped on
system bus for Application Processors(APUs).
CDX devices can be changed dynamically in the Fabric and CDX
bus interacts with CDX controller to rescan the bus and
rediscover the devices.
Signed-off-by: Nipun Gupta <nipun.gupta@amd.com>
Reviewed-by: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@amd.com>
Tested-by: Nikhil Agarwal <nikhil.agarwal@amd.com>
Link: https://lore.kernel.org/r/20230313132636.31850-2-nipun.gupta@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-cdx | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-cdx b/Documentation/ABI/testing/sysfs-bus-cdx new file mode 100644 index 000000000000..43b4e161f226 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-cdx @@ -0,0 +1,12 @@ +What: /sys/bus/cdx/rescan +Date: March 2023 +Contact: nipun.gupta@amd.com +Description: + Writing y/1/on to this file will cause rescan of the bus + and devices on the CDX bus. Any new devices are scanned and + added to the list of Linux devices and any devices removed are + also deleted from Linux. + + For example:: + + # echo 1 > /sys/bus/cdx/rescan |