run-cxl-x86_64

#!/bin/bash
# Copyright (c) Stephen Bates, Shai Bergman 2022
#
# run-cxl-x86_64
# ---------------
#
# A shell script to boot up a VM that has CXL enabled end-points on
# an x86_64 machine. As of this point the versioning is:
#
# QEMU: 7.2.0-rc3
# Kernel: cxl-pending branch of:
#   https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git/
# Distro: Ubuntu 22.04
# Tested on Intel Xeon silver 4216 and AMD EPYC 7282
#
# Note: Can create pmem region with cxl-cli - but cannot online it

USAGE="Usage: `basename $0` -i IMAGE_FILE BZIMAGE"
QEMU_BIN=${QEMU_BIN:-qemu-system-x86_64}
IMAGE=

while getopts i: OPT; do
     case "$OPT" in
        i)
            IMAGE=$OPTARG
            ;;
        \?)
            echo $USAGE >&2
            exit 1
            ;;
    esac
done

shift $((OPTIND-1))

KERNEL=$1

$QEMU_BIN \
    -machine type=q35,hmat=on,nvdimm=on,cxl=on \
    -enable-kvm -cpu host,migratable=no \
    -nographic \
    -serial mon:stdio \
    -m 4G,maxmem=10G \
    -smp 4,sockets=1,maxcpus=4 \
    -numa node,nodeid=0,cpus=0-3,memdev=m0 \
    -drive if=none,file=./images/cxl.qcow2,format=qcow2,id=hd \
    -device virtio-blk-pci,drive=hd \
    -device e1000,netdev=user0 -netdev user,id=user0,hostfwd=tcp::2222-:22 \
    -rtc clock=host \
    -kernel $KERNEL -append "nokaslr norandmaps root=/dev/vda1 console=ttyS0 \
        earlyprintk=serial,ttyS0 ignore_loglevel printk_delay=0" \
    -object memory-backend-ram,id=m0,size=4G \
    -object memory-backend-file,id=cxl-mem1,share=on,mem-path=/tmp/cxltest.raw,size=256M \
    -object memory-backend-file,id=cxl-lsa1,share=on,mem-path=/tmp/lsa.raw,size=256M \
    -device pxb-cxl,bus_nr=52,bus=pcie.0,id=cxl.1 \
    -device cxl-rp,port=0,bus=cxl.1,id=root_port13,chassis=0,slot=2 \
    -device cxl-type3,bus=root_port13,volatile-memdev=cxl-mem1,lsa=cxl-lsa1,id=cxl-pmem0 \
    -M cxl-fmw.0.targets.0=cxl.1,cxl-fmw.0.size=256M