Support Maximum pcie devices(256)

Support Maximum pcie devices(256)

#!/bin/sh

MACHINE=q35
SMP=4,cores=2,threads=2,sockets=1
MEM=2G
GUEST_IMG=/home/RHEL7.0.raw
IMG_FORMAT=raw

CLI="/usr/libexec/qemu-kvm -enable-kvm -M $MACHINE -smp $SMP -m $MEM -name vm1 -drive file=$GUEST_IMG,if=none,id=guest-img,format=$GUEST_IMG,werror=stop,rerror=stop -device ide-hd,drive=guest-img,bus=ide.0,unit=0,id=os-disk,bootindex=1 -spice port=5931,disable-ticketing -vga qxl -monitor stdio -qmp tcp:0:6666,server,nowait -boot menu=on"

while [ ${i:=0} -lt ${1:-0} ]
do
    dstreamId=$((i))
    ustreamId=$((dstreamId/32))
    chassisId=$((dstreamId+1))
    blkDiskId=$((dstreamId))

    if [ $((dstreamId%32)) -eq 0 ]
    then
        CLI="$CLI -device ioh3420,bus=pcie.0,id=root.$ustreamId,slot=$ustreamId"
        CLI="$CLI -device x3130-upstream,bus=root.$ustreamId,id=upstream$ustreamId"
    fi

    CLI="$CLI -device xio3130-downstream,bus=upstream$ustreamId,id=downstream$dstreamId,chassis=$chassisId"
    CLI="$CLI -drive file=/home/disk/disk$blkDiskId,if=none,id=disk$blkDiskId,format=qcow2 "
    CLI="$CLI -device virtio-blk-pci,scsi=off,drive=disk$blkDiskId,id=virtio-blk$blkDiskId,bus=downstream$dstreamId"
    i=$((i+1))
done

$CLI