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I want ask to increase supported CPU core on qemu kvm. When I creating new VM I see error like below

error: internal error: QEMU unexpectedly closed the monitor (vm='ID'): qemu-system-x86_64: -accel kvm: warning: Number of hotpluggable cpus requested (128) exceeds the recommended cpus supported by KVM (32).

What command or step to increase total cpus supported by kvm?

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I think you can use the qemu's option maxcpus. See the Qemu's Virtual CPU hotplug doc.

$ qemu-system-x86_64 -display none -no-user-config -m 2048 \ -nodefaults -monitor stdio -machine pc,accel=kvm,usb=off \ -smp 1,maxcpus=2 -cpu IvyBridge-IBRS \ -qmp unix:/tmp/qmp-sock,server=on,wait=off
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