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Networking in Qemu with Xilinx-zcu102 machine

From: asif siddiqui
Subject: Networking in Qemu with Xilinx-zcu102 machine
Date: Tue, 8 Jun 2021 22:39:19 +0530

Hello All,

I am working on the networking between my host OS linux and guest OS QNX(Running on top of qemu). I have an interface xzynq0 in my guest OS with a static/dynamic IP address. 

I am executing the qemu command as follows - 

qemu-system-aarch64 -M xlnx-zcu102 -m 8G -serial mon:stdio -display none -device loader,file=QNX_IFS.bin,cpu-num=0 -netdev bridge,br=virbr0,id=net0,helper=/usr/lib/qemu/qemu-bridge-helper -nographic  -global xlnx,zynqmp-boot.cpu-num=0 -global xlnx,zynqmp-boot.use-pmufw=true
But the observation is when i try to ping the guest OS with some IP from my host OS, it is showing destination unreachable or when i try to ping from my guest to host it shows host is down. 

I do have a virbr0 bridge in my host os - 

virbr0    Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          inet addr:  Bcast:  Mask:
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B) 

And in my guest OS the interface is - 

address: 00:0a:35:02:78:10
media: Ethernet 100baseTX full-duplex
status: active
inet netmask 0xffffff00 broadcast
inet6 fe80::20a:35ff:fe02:7810%xzynq0 prefixlen 64 scopeid 0x11

Can you please help me out here what am i missing to enable the networking. Is it the case that bridge is not getting set correctly ? Or what can be the possible reasons for the same ? 


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