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by ec109685 2767 days ago
That’s not true. Your guest application has access to all Linux system calls in the guest VM.

You can see here the security model: https://github.com/firecracker-microvm/firecracker/blob/mast...

The firecracker process itself is limited in the system calls it can make, but kvm allows the guest Linux process the ability to expose a full set of system calls to end user applications.