Comment 2 for bug 1868692

With the current build:
sudo qemu-system-x86_64 --enable-kvm --nographic --nodefaults -S -qmp-pretty stdio
{"execute":"qmp_capabilities"}
{"execute":"query-cpu-definitions"}
        {
            "name": "qemu64",
            "typename": "qemu64-x86_64-cpu",
            "unavailable-features": [
                "svm"
            ],
            "static": false,
            "migration-safe": true
        },

vmx isn't in /usr/share/libvirt/cpu_map/x86_qemu64.xml but it wasn't before and got auto-added. So lets recheck the new build before tweaking too many knobs at once (and XML changes can be done at runtime without rebuild).