Hi Team,
Sorry for the disturbance. I have to ask for your help since I can't
solve the problem by googling.
*Below is the problem:*
I met a problem when I tried to use IVSHMEM. Command lspci does not show
the IVSHMEM device.
Below is the configuration from my side:
*1. guest vm xml configuration.*
<shmem name='ivshmem'>
<model type='ivshmem-plain'/>
<size unit='M'>2</size>
<address type='pci' domain='0x0000' bus='0x00' slot='0x10'
function='0x0'/>
</shmem>
*2. after the booting up and I found the qemu commandline ideedly have the
device option:*
ps aux | grep ivshmem
/usr/bin/qemu-system-x86_64
.......(ignore other options)
-object
memory-backend-file,id=shmmem-shmem0,mem-path=/dev/shm/hostmem,size=4194304,share=yes
-device ivshmem-plain,id=shmem0,memdev=shmmem-shmem0,bus=pcie.0,addr=0x10
*3. lspci command not shown the device.*
*4. lshw command indeedly show the device:*
*-memory UNCLAIMED
description: RAM memory
product: Inter-VM shared memory
vendor: Red Hat, Inc.
physical id: 10
bus info: pci@0000:00:10.0
version: 01
width: 64 bits
clock: 33MHz (30.3ns)
configuration: latency=0
resources: memory:fcc1c000-fcc1c0ff memory:fdc00000-fdffffff
My host and vm os is ubuntu 20.04 and version is:
#49~20.04.1-Ubuntu SMP Fri Feb 5 09:57:56 UTC 2021 x86_64 x86_64 x86_64
GNU/Linux
Also I have asked a question on stackoverflow website, I provide the link
for your reference:
https://stackoverflow.com/questions/66432392/comand-lspci-does-not-show-the-the-ivshmem-device
Thanks in advance.
Best regards,
Sean
