how to enable network on FVP

Hello,

I have just done the test with the latest Foundation model (1)  and latest images from Linaro (2) and I do get the expected output from ifconfig (3).

(1): the model is from https://developer.arm.com/products/system-design/fixed-virtual-platforms and started with this command line:

Foundation_Platform --cores=1  --no-secure-memory --visualization --use-real-time  --gicv3 --data=bl1.bin@0x0 --data=fip.bin@0x8000000 --data=Image@0x80080000 --data=foundation-v8-gicv3.dtb@0x82000000 --data=ramdisk.img@0x84000000  --block-device=/media/simini01/Data2/linaro/17.10/lt-vexpress64-openembedded_lamp-armv8-gcc-4.9_20150912-729.img --network=nat

(2): https://community.arm.com/dev-platforms/b/documents/posts/using-linaros-deliverables-on-an-fvp and I have done the test with the pre-built image "latest-armlt + OpenEmbedded LAMP 15.09"

(3): This is the output I am getting:

...
Configuring network interfaces... [   75.230401] smc91x 1a000000.ethernet eth0: link up, 10Mbps, half-duplex, lpa 0x0000
udhcpc (v1.23.2) started
Sending discover...
Sending select for 172.20.51.1...
Lease of 172.20.51.1 obtained, lease time 86400
/etc/udhcpc.d/50default: Adding DNS 172.20.51.254
/etc/udhcpc.d/50default: Adding DNS 172.20.51.25
...
root@genericarmv8:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:02:F7:EF:DE:7A  
          inet addr:172.20.51.1  Bcast:172.20.51.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2 errors:0 dropped:0 overruns:0 frame:0
          TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:654 (654.0 B)  TX bytes:4505 (4.3 KiB)
          Interrupt:11 Base address:0xb000 DMA chan:ff

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:10 errors:0 dropped:0 overruns:0 frame:0
          TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:700 (700.0 B)  TX bytes:700 (700.0 B)

Could you confirm which version of the Foundation model, what command line and which SW stack you are using?

From a quick look, the version displayed for udhcp is more recent than mine, so it could be a SW issue.

Also note that to be able to communicate with the outside world using the "nat" network, you will also need to map ports from the host to the target with this option:

  --network-nat-ports=M  optional comma separated list of NAT port mappings
                         in the form: host_port=model_port e.g. 8022=22

Regards,

Simon

OP-TEE/build

As you can see, the default FVP version required by the script is "Linux64_GCC-4.9". I work around this by just adding a

directory named "Linux64_GCC-4.9" and copying the actual executable file under directory  "Linux64_GCC-4.7"

Also, my FVP host is standard ubuntu 16.04 with a IP 10.0.2.15,

I have tried several combinations of the following parameters, and nothing changed.

--network=nat \
--network-nat-subnet=10.0.2.0/2300 \  
--network-nat-ports=8022=22

according to your analysis, maybe I should try another FVP

I am very appreciative if you can give some more advice based on the info above.

thanks

***. 

I would recommend updating the model to the latest version (from https://developer.arm.com/products/system-design/fixed-virtual-platforms, it will be verison 11.2) but I doubt this is causing your issue, it is much more likely to be a SW issue.

I've followed the same instructions and had the same output, so I can confirm you are not doing anything wrong but network support on this particular SW stack is not working.
Based on the fact that the configuration does not allow for the --network option to be provided by default, I would assume this configuration has not been tested and is not the purpose of this script.

If you really need this SW stack, I would suggest contacting Linaro, otherwise you could use the SW stack described in https://community.arm.com/dev-platforms/b/documents/posts/using-linaros-deliverables-on-an-fvp .

Regards,

Simon