Most Modern Laptop That Fully Supports Qubes OS

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What makes you think Xen doesn’t work well with P/E cores?

There’s a topic on CPU pinning. Rather than wasting your E cores you can pin your Dom0 and sys-vms to them while giving your other VMs P cores.

However I agree that having Xen 4.19 is not ideal. I would happily help if I can to get a newer version in.

CPU Pinning Alder Lake

If you have an Alder Lake or newer Intel CPU, you probably want the option to load a qube on the P or E cores, and this might help someone who is new to xen. https://dev.qubes-os.org/projects/core-admin/en/latest/libvirt.html https://libvirt.org/formatdomain.html#cpu-allocation Dom0 First, you need to add the following to GRUB_CMDLINE_XEN_DEFAULT dom0_max_vcpus=4 dom0_vcpus_pin If you want to use SMT read the notes at the end. The CPU I’m using is the 12900K, which has 16 physical cores an…

On the contrary, SMT(HyperThreading) has often been touted as vulnerable to side-channel attacks. Most laptop CPUs which aint big-little do have HyperThreading and disabling it would further reduce performance.