CODEWITHSUNDEEP
qemukvm
Noamiko
Noamiko

Reputation: 749

How to run QEMU without TCG and without KVM

I'm trying to shut down a virtual core while my QEMU Virtual Machine is running.

For that purpose, I need to use the function qemu_cpu_kick() which is found at cpus.c:

void qemu_cpu_kick(CPUState *cpu)
{
    qemu_cond_broadcast(cpu->halt_cond);
    if (!tcg_enabled() && !cpu->thread_kicked) {
            qemu_cpu_kick_thread(cpu);
            cpu->thread_kicked = true;
    }
}

It works well - only if I enable KVM. However, I need to have KVM disabled, and once I disable KVM - the tcg_enabled() function returns true, and the cpu doesn't shut down.

Is it possible to disable TCG?

I didn't find any knob regarding TCG; --disable-tcg, as well as other trials, do not work. I tried to reconfigure my compilation with --disable-tcg-interpreter, but still nothing changes.

So, how can I disable TCG ? Or, alternatively - is there a better way to shut down a virtual cpu?

Thanks!

Upvotes: 6

Views: 4699

Answers (1)

Noamiko
Noamiko

Reputation: 749

Well, as I understood, running QEMU without KVM forces QEMU to use the Tiny Code Generator (TCG) instead of KVM. So, running QEMU without KVM and without TCG is simply not possible!

Upvotes: 5

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