Prepare ENV:
guest check disk script /home/disk.sh:
root@vm-198-185 /home $ cat disk.sh 
#!/bin/bash
for((i=0;i<1000;i++)) ;do 
	n=`lsblk -nd -o name,size,serial|grep TARGET_DISK|wc -l`
        lsblk -nd -o name,size,serial
	if (( n<4 ));then
		echo "Wrong:`date`"
        	sleep 0.5
	else
		break
	fi
done
echo "$i"

login guest script:
#!/bin/bash

[[ "$1" == "" ]] && ip="10.72.142.207" || ip="$1"
for ((i = 0; i < 60; i++)); do
  if ping $ip -c 1 -W 1 > /dev/null; then break; fi;
  sleep 1;echo -n "."
done
echo
ssh $ip /home/disk.sh


1.Boot VM
[[ "$1" == "" ]] && os=rhel100 || os=$1
echo $os
/usr/libexec/qemu-kvm \
-name 'avocado-vt-vm1'  \
-machine q35,memory-backend=mem-machine_mem \
-device '{"id": "pcie-root-port-0", "driver": "pcie-root-port", "multifunction": true, "bus": "pcie.0", "addr": "0x1", "chassis": 1}' \
-device '{"id": "pcie-pci-bridge-0", "driver": "pcie-pci-bridge", "addr": "0x0", "bus": "pcie-root-port-0"}'  \
-nodefaults \
-device '{"driver": "VGA", "bus": "pcie.0", "addr": "0x2"}' \
-m 12288 \
-object '{"size": 12884901888, "id": "mem-machine_mem", "qom-type": "memory-backend-ram"}'  \
-smp 10,maxcpus=10,cores=5,threads=1,dies=1,sockets=2  \
-cpu 'Cascadelake-Server-noTSX',+kvm_pv_unhalt \
\
-device '{"id": "pcie-root-port-1", "port": 1, "driver": "pcie-root-port", "addr": "0x1.0x1", "bus": "pcie.0", "chassis": 2}' \
-device '{"driver": "qemu-xhci", "id": "usb1", "bus": "pcie-root-port-1", "addr": "0x0"}' \
-device '{"driver": "usb-tablet", "id": "usb-tablet1", "bus": "usb1.0", "port": "1"}' \
-object '{"qom-type": "iothread", "id": "iothread0"}' \
-object '{"qom-type": "iothread", "id": "iothread1"}' \
-object '{"qom-type": "throttle-group", "x-bps-total": 163840, "x-iops-total": 40, "x-iops-total-max": 50, "x-iops-total-max-length": 10, "x-bps-total-max": 204800, "x-bps-total-max-length": 10, "id": "group1"}' \
-object '{"qom-type": "throttle-group", "x-bps-total": 204800, "x-iops-total": 50, "x-iops-total-max": 60, "x-iops-total-max-length": 10, "x-bps-total-max": 245760, "x-bps-total-max-length": 10, "id": "group2"}' \
-device '{"id": "pcie-root-port-2", "port": 2, "driver": "pcie-root-port", "addr": "0x1.0x2", "bus": "pcie.0", "chassis": 3}' \
-device '{"id": "virtio_scsi_pci0", "driver": "virtio-scsi-pci", "bus": "pcie-root-port-2", "addr": "0x0", "iothread": "iothread0"}' \
-blockdev '{"node-name": "file_image1", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "native", "filename": "'/home/kvm_autotest_root/images/$os.qcow2'", "cache": {"direct": true, "no-flush": false}}' \
-blockdev '{"node-name": "drive_image1", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_image1"}' \
-device '{"driver": "scsi-hd", "id": "image1", "drive": "drive_image1", "write-cache": "on"}' \
-blockdev '{"node-name": "file_stg1", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "native", "filename": "/home/kvm_autotest_root/images/mstg1.qcow2", "cache": {"direct": true, "no-flush": false}}' \
-blockdev '{"node-name": "qcow2_stg1", "driver": "qcow2", "file": "file_stg1", "read-only": false, "cache": {"direct": true, "no-flush": false}}' \
-blockdev '{"node-name": "drive_stg1", "driver": "throttle", "throttle-group": "group1", "file": "qcow2_stg1"}' \
-device '{"driver": "scsi-hd", "id": "stg1", "drive": "drive_stg1", "write-cache": "on", "serial": "TARGET_DISK1"}' \
-blockdev '{"node-name": "file_stg2", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "native", "filename": "/home/kvm_autotest_root/images/mstg2.qcow2", "cache": {"direct": true, "no-flush": false}}' \
-blockdev '{"node-name": "qcow2_stg2", "driver": "qcow2", "file": "file_stg2", "read-only": false, "cache": {"direct": true, "no-flush": false}}' \
-blockdev '{"node-name": "drive_stg2", "driver": "throttle", "throttle-group": "group1", "file": "qcow2_stg2"}' \
-device '{"driver": "scsi-hd", "id": "stg2", "drive": "drive_stg2", "write-cache": "on", "serial": "TARGET_DISK2"}' \
-blockdev '{"node-name": "file_stg3", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "native", "filename": "/home/kvm_autotest_root/images/mstg3.qcow2", "cache": {"direct": true, "no-flush": false}}' \
-blockdev '{"node-name": "qcow2_stg3", "driver": "qcow2", "file": "file_stg3", "read-only": false, "cache": {"direct": true, "no-flush": false}}' \
-blockdev '{"node-name": "drive_stg3", "driver": "throttle", "throttle-group": "group2", "file": "qcow2_stg3"}' \
-device '{"driver": "scsi-hd", "id": "stg3", "drive": "drive_stg3", "write-cache": "on", "serial": "TARGET_DISK3"}' \
-blockdev '{"node-name": "file_stg4", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "native", "filename": "/home/kvm_autotest_root/images/mstg4.qcow2", "cache": {"direct": true, "no-flush": false}}' \
-blockdev '{"node-name": "qcow2_stg4", "driver": "qcow2", "file": "file_stg4", "read-only": false, "cache": {"direct": true, "no-flush": false}}' \
-blockdev '{"node-name": "drive_stg4", "driver": "throttle", "throttle-group": "group2", "file": "qcow2_stg4"}' \
-device '{"driver": "scsi-hd", "id": "stg4", "drive": "drive_stg4", "write-cache": "on", "serial": "TARGET_DISK4"}' \
-device '{"id": "pcie-root-port-3", "port": 3, "driver": "pcie-root-port", "addr": "0x1.0x3", "bus": "pcie.0", "chassis": 4}' \
-device '{"driver": "virtio-net-pci", "mac": "9a:bb:aa:b4:7b:2f", "id": "idbIhL3Q", "netdev": "idK1r2tJ", "bus": "pcie-root-port-3", "addr": "0x0"}' \
-netdev  '{"id": "idK1r2tJ", "type": "tap", "vhost": true}'  \
-vnc :5 \
-monitor stdio \
-qmp tcp:0:5955,server=on,wait=off \
-rtc base=utc,clock=host,driftfix=slew  \
-boot menu=off,order=cdn,once=c,strict=off \
-enable-kvm \
-device '{"id": "pcie_extra_root_port_0", "driver": "pcie-root-port", "multifunction": true, "bus": "pcie.0", "addr": "0x3", "chassis": 5}' \
-chardev socket,id=socket-serial,path=/var/tmp/socket-serial,logfile=/var/tmp/file-serial.log,mux=on,server=on,wait=off \
-serial chardev:socket-serial \
-chardev file,path=/var/tmp/file-bios.log,id=file-bios \
-device isa-debugcon,chardev=file-bios,iobase=0x402 \

2.run login guest script
./guest.sh $ip

3.check the output