Configuring PCI Pass Through over Openstack Cloud

2.2 Configuring PCI Pass Through over Openstack 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 eLynx card (compute).
Execute the following lspci commnd to show vendor_id and product_id:
```
lspci -vvv -nn | grep -i "10ee:7035" -A 11
```
Sample Output:
```
[root@host2 ~]$  lspci -vvv -nn | grep -i "10ee:7035"  -A 2
07:00.0 Network controller [0280]: Xilinx Corporation Device [10ee:7035] (rev 10)
        Subsystem: Xilinx Corporation Device [10ee:0007]
        Physical Slot: 2
```
In the above output:
- 07:00.0 is the PCI address of the eLYNX card.
- The value “10ee:7035” represents Vendor ID (10ee) and Product ID (7035)
- Physical Slot: 2 indicates the physical PCIe slot where the eLYNX card is inserted.
Configure nova-api (controller).
Add eLynx card to nova.conf file on the controller:

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

Example:
```
[pci] 
pci_passthrough_whitelist = "{"vendor_id":"10ee","product_id":"7035"}"
alias = "{"vendor_id":"10ee","product_id":"7035",”device_type”:”type-PCI”,”name”:”elynx1}"
```
In this example the card name is eLynx1:

Note: If multiple eLynx cards are connected to a host, multiple alias needs to be created.
Update flavor with the card name (controller or cli box).
Execute the following command:
```
openstack flavor set elynx_flavor --property
        "pci_passthrough:alias"="elynx1:1"
```

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
```