gpu : add gpu sensor app
The commit adds a dbus sensor app that uses MCTP VDM protocol to read
temperature sensor value from the gpu.
The MCTP VDM protocol is an extension of the OCP specification -
'''
https://www.opencompute.org/documents/ocp-gpu-accelerator-management-interfaces-v1-pdf
'''
Tested.
Copy the gpusensor app on gb200nvl-obmc machine and run it.
```
root@gb200nvl-obmc:~# ./gpusensor
```
The app runs without errors.
```
root@gb200nvl-obmc:~# busctl tree xyz.openbmc_project.GpuSensor
└─ /xyz
└─ /xyz/openbmc_project
└─ /xyz/openbmc_project/sensors
```
Change-Id: Iee7376a9116489052c690f2e3a1ca8d0f29564dd
Signed-off-by: Harshit Aghera <haghera@nvidia.com>
diff --git a/meson.options b/meson.options
index de733c9..f927eb2 100644
--- a/meson.options
+++ b/meson.options
@@ -65,6 +65,12 @@
description: 'Enable PSU sensor.',
)
option(
+ 'gpu',
+ type: 'feature',
+ value: 'enabled',
+ description: 'Enable GPU sensor.',
+)
+option(
'external',
type: 'feature',
value: 'enabled',