CPU Pinning Alder Lake

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Possible improvements:
/usr/share/qubes/templates/libvirt/xen-user.xml

{% extends 'libvirt/xen.xml' %}
{% block basic %}
        {% if vm.features.get('vcpu_pin_pcores', '0') == '1' -%}
        <vcpu>{{ vm.vcpus }}</vcpu>
            <cputune>
                {% for i in range(vm.vcpus) %}
                    <vcpupin vcpu='{{ i }}' cpuset='{{ i }}'/>
                {% endfor %}
            </cputune>
        {% else -%}
        <vcpu>{{ vm.vcpus }}</vcpu>
            <cputune>
                {% for i in range(vm.vcpus) %}
                    <vcpupin vcpu='{{ i }}' cpuset='16-23'/>
                {% endfor %}
            </cputune>
        {% endif -%}
        {{ super() }}
{% endblock %}

Set vcpu_pin_pcores feature to 1 for the qubes that should use P-cores:

qvm-features GamingQube vcpu_pin_pcores 1

Other qubes will use E-cores.

Automatically set the HVM stubdomains to use specific cores using libxl hook: