Intro

  • 文章不对CXL、Linux内核进行深究，可视为hello world研究

  • 对于QEMU基本的使用知识，节省篇幅不再赘述，并省略繁琐细节

软件环境

宿主机&客户机

ubuntu-22.04.2-live-server-amd64

QEMU 8.0.3

https://download.qemu.org/qemu-8.0.3.tar.xz

Download QEMU - QEMU

按照官方流程进行编译

启动虚拟机

qemu-system-x86_64 -M q35,cxl=on -accel kvm -cpu host -m 4096 -smp 4 -drive file=drive \
    -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=12,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,memdev=cxl-mem1,lsa=cxl-lsa1,id=cxl-pmem0 \
    -M cxl-fmw.0.targets.0=cxl.1,cxl-fmw.0.size=4G

启动后应该可以在/dev目录下找到CXL文件

REF

在ubuntu上执行QEMU的编译安装_ubuntu安装qemu_田园诗人之园的博客-CSDN博客

linux报错：/bin/sh: 1: flex: not found scripts/Makefile.host:9: recipe for target ‘scripts/kconfig/lexe_锅锅是锅锅的博客-CSDN博客

How To Emulate CXL Devices using KVM and QEMU - Steve Scargall