Host's GPIO access from within different qemu based VMs, say, the ones running in pve.

[Hongyi Zhao]

I noticed the explanations on the general-purpose input/output (GPIO)
on the wiki: <https://en.wikipedia.org/wiki/General-purpose_input/output>.

But I still don't know the specific access method to the GPIO on the
host's motherboard from within different qemu based VMs, say, the ones
running in pve (https://pve.proxmox.com), which is a famous open
source server virtualization management solution based on QEMU/KVM and
LXC. Any hints
will be highly appreciated.

Regards
-- 
Assoc. Prof. Hongyi Zhao <hongyi.zhao@gmail.com>
Theory and Simulation of Materials
Hebei Polytechnic University of Science and Technology engineering
NO. 552 North Gangtie Road, Xingtai, China