Configuring PCI Pass Through over Cloud

Perform the following steps to configure PCI pass through over cloud:

Configure nova-scheduler (controller).

Add PciPassthroughFilter filter to nova.conf with the following command:

[filter_scheduler]
enabled_filters = <your filters>, PciPassthroughFilter
available_filters = nova.scheduler.filters.all_filters

Locate vendor_id and product_id of the Adax card (compute).
Execute the following lspci commnd to show vendor_id and product_id:
```
lspci -v |grep -i Adax -B 2 -A 8
```
Sample Output:

In the above output, 14:00.0 is the PCI address of the Adax card, Using this address, the vendor_id and product_id can be listed with the following command:
```
lspci -nn -s 14:00.0
```
Sample Output:
In the above output, 14:00.0 is the PCI address of the Adax card, Using this address, the vendor_id and product_id can be listed as follows:
- vendor_id=1957
- product_id=0091
Configure nova-api (controller).
Add Adax card to nova.conf file on the controller:

The type of the card must be type-PCI. Name can be anything.

Example:

In this example the card name is Adax1:

Note: If multiple Adax cards are connected to a host, multiple alias needs to be created. In this example, one Adax card is connected to a host.
Update flavor with the card name (controller or cli box).
Execute the following command:
```
openstack flavor set Adax --property 
"pci_passthrough:alias"="Adax1:1"
```
Note: To connect multiple Adax cards to a VM, use Adax1:2 (connect 2 cards), Adax1:3 (connect 3 cards).
Configure nova-compute (compute)
Whitelist Adax1 card on the compute node in nova.conf with the following command:
```
[pci]
pci_passthrough_whitelist = "{"vendor_id":"1957","product_id":"0091"}"
```

Restart the controller and compute services.

Restart the controller services with the following command:

systemctl restart openstack-nova-api.service
  openstack-nova-conductor.service
  openstack-nova-consoleauth.service
 openstack-nova-metadata-api.service
 openstack-nova-scheduler.service

Restart the compute services with the following command:
```
systemctl restart openstack-nova-compute.service
```