My Proxmox evsieve hooks for controlling custom events on the host while inside a GPU-passthrough VM. Allows switching between passthrough VMs.

evsieve-hooks.service

[Unit]
Description=Run custom evsieve hooks.

[Service]
Type=simple
ExecStart=bash -c '/usr/local/sbin/evsieve-hooks.sh'
Restart=always
RestartSec=1s

[Install]
WantedBy=multi-user.target

evsieve-hooks.sh

#!/bin/bash
source /root/.bashrc
KEY="$1"

if [ -z "$KEY" ]; then
        key_combo="key:rightshift key:rightalt key:rightctrl"

        evsieve --input /dev/input/by-id/uinput-persist-redragon-K580-keyboard0 \
                --hook $key_combo key:delete exec-shell="$0 delete" \
                --hook $key_combo key:f5 exec-shell="$0 f5" \
                --hook $key_combo key:f9 exec-shell="$0 f9" \
                --hook $key_combo key:f10 exec-shell="$0 f10" \
                --hook $key_combo key:f11 exec-shell="$0 f11" \
                --hook $key_combo key:f12 exec-shell="$0 f12"
else
        MAX_ATTEMPTS="5" # How many attempts to run command before giving up. (Each attempt is 1 second)

        attempt()
        {
                command="$1"
                attempts="${2:-0}"

                if [ "$attempts" -ge "$MAX_ATTEMPTS" ]; then
                        echo "Failed to run command, giving up.."
                        return
                fi

                eval "$command"

                if [ "$?" -ne 0 ]; then
                        sleep 1
                        attempt "$command" "$(($attempts+1))"
                        return
                fi
        }

        shutdown_proxmox()
        {
                systemctl poweroff
        }

        primary_gpu_vm_1()
        {
                attempt 'qm shutdown 101'
                attempt 'qm shutdown 111'
                sleep 2
                attempt 'qm start 105'
        }

        primary_gpu_vm_2()
        {
                attempt 'qm shutdown 105'
                attempt 'qm shutdown 111'
                sleep 2
                attempt 'qm start 101'
        }

        primary_gpu_vm_3()
        {
                return
        }

        primary_gpu_vm_4()
        {
                attempt 'qm shutdown 101'
                attempt 'qm shutdown 105'
                sleep 2
                attempt 'qm start 111'
        }

        secondary_gpu_vm_1()
        {
                attempt 'qm start 103'
        }

        case "$KEY" in
                delete)
                        shutdown_proxmox
                ;;
                f5)
                        secondary_gpu_vm_1
                ;;
                f9)
                        primary_gpu_vm_1
                ;;
                f10)
                        primary_gpu_vm_2
                ;;
                f11)
                        primary_gpu_vm_3
                ;;
                f12)
                        primary_gpu_vm_4
                ;;
        esac
fi