Hello, 
I've recently tried libvirt api to manage virtual machine. 
The point of my work is to modify the topology of a virtual machine and test 
performances (add numa nodes, change number of cpu per numa, nvm devices, cxl, 
etc) 
As far as understand, when using virt-manager, qemu arguments stored in xml 
files can only be like the one that page: 
[ https://wiki.libvirt.org/QEMUSwitchToLibvirt.html | 
https://wiki.libvirt.org/QEMUSwitchToLibvirt.html ] 

But maybe I misundertood? 

For example, when I directly run qemu with arguments, I can add an arguments 
like this: 
qemu [...] -object memory-backend-ram,size=4G,id=ram0 
-object memory-backend-ram,size=2G,id=ram1 
-numa node,nodeid=0,memdev=ram0,cpus=0-3 
-numa node,nodeid=1,memdev=ram1,cpus=4-7 

To have 2 numa nodes with 4 cpus each. 
Is there an equivalent of -objet, -numa, -device; qemu arguments when using 
libvirt? Or arguments are restricted to the one described on wiki page? 

Thanks for you help, 
Have a good day, 
Pierre Clouzet 
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