QEMU Version

ver	date
Qemu 7.0	2020-04-30
Qemu 6.0	2020-04-30
Qemu 5.0	2020-04-29
Qemu 4.2.0	2019-12-13
Qemu 4.0.0	2019-04-24
Qemu 2.1.2	2018-04-24

• https://wiki.qemu.org/Planning
• https://wiki.qemu.org/ChangeLog
• https://github.com/airbus-seclab/qemu_blog

Qemu 7.0

• x86 - Intel AMX
• https://wiki.qemu.org/ChangeLog/7.0
  • https://news.ycombinator.com/item?id=31093564

Qemu 6.0

• tcg 支持 macOS ARM
• 68k virt mahcine
• arm
  • ARMv8.1-M Helium arch, Cortex-M55 CPU
  • ARMv8.4 TTST, SEL2, DIT
  • ARMv8.5 MemTag
  • mps3-an524, mps3-an547 board
  • xlnx-zynqmp, xlnx-versal, sbsa-ref, npcm7xx, sabrelite
• MIPS Loongson-3 virt machine
• virtiofs USE_KILLPRIV_V2
• virtio-vga scaling resolution based on client window size
• 废弃 -writeconfig - 语法参数等无法保证正确
• -machine 新增 ACPI 选项 oem-id, oem-table-id
• -machine x-remote, -device x-pci-proxy-dev 多进程 QEMU - 目前只支持 lsi53c895 SCSI
• 支持将 usb 传输数据转储到文件 - 用于 wireshark 分析 - pcap=<file>

Qemu 5.2

• x86 KVM 异步 page faults - -cpu ...,kvm-async-pf-int
  • Linux 5.8+
• NVMe 1.3
• SMBIOS OEM 字符串可从文件读取

Qemu 5.1

• 2020-08-11
• RPi 支持 USB 控制器
  • guest 添加 dwc_otg.fiq_fsm_enable=0
• AMD X86 支持 迁移 嵌套虚拟化
• 支持 Linux keyring 传递 secret
• LUKS keyslot 管理
• qcow2 支持 zstd - compression_type=zstd
• AVR 架构

# 添加 keyslot
qemu-img amend \
  --object secret,id=sec0,data=current_password \
  --object secret,id=sec1,data=new_password \
  --image-opts driver=luks,file.filename=test.luks,key-secret=sec0 \ #image has to be opened with --image-opts to pass current secret
-o state=active,new-secret=sec1,[keyslot=1] #keyslot is optional
# 移除
qemu-img amend \
  --object secret,id=sec0,data=current_password \
  --object secret,id=sec1,data=new_password \
  --image-opts driver=luks,file.filename=test.luks,key-secret=sec0 \
  -o state=inactive,old-secret=sec1

Qemu 5.0

• 5.0.0 - 2020-04-29
• virtiofsd - 映射主机目录
  • Linux 5.4 支持 VirtIO-FS
• D-Bus QEMU 进程 Live-Migration
• block
  • 支持压缩备份镜像
  • qemu-img measure 支持 LUKS， convert 支持跳过 zero
  • qemu-storage-daemon 支持访问存储，不需要启动 VM

# ./virtiofsd -o vhost_user_socket=/tmp/vhostqemu -o source=$TESTDIR -o cache=always

qemu-system-x86_64 -M pc -cpu host --enable-kvm -smp 2 \
  -m 4G -object memory-backend-file,id=mem,size=4G,mem-path=/dev/shm,share=on -numa node,memdev=mem \
  -chardev socket,id=char0,path=/tmp/vhostqemu -device vhost-user-fs-pci,queue-size=1024,chardev=char0,tag=myfs \
  -chardev stdio,mux=on,id=mon -mon chardev=mon,mode=readline -device virtio-serial-pci -device virtconsole,chardev=mon -vga none -display none \
  -drive if=virtio,file=rootfsimage.qcow2

mount -t virtiofs myfs /mnt

# DAX
#  -device vhost-user-fs-pci,queue-size=1024,chardev=char0,tag=myfs,cache-size=2G

Qemu 4.2.0

• 4.2.0 - 2019-12-13
• x86
  • VMX 可通过 -cpu 启用或停用
  • microvm 使用 virtio-mmio 而不是 PCI 作为性能基线优化
  • macOS -accel hvf 稳定

Qemu 4.1.0

• https://www.qemu.org/2019/08/16/qemu-4-1-0/

Qemu 4.0.0

• https://www.qemu.org/2019/04/24/qemu-4-0-0/

Qemu 3.1.0

• ARM
• qemu-img tool can now generate LUKS-encrypted files through ‘convert’ command
• https://www.qemu.org/2018/12/12/qemu-3-1-0/

Qemu 3.0.0

• 完整的 ARM 7 模拟
• Sparc32
• Sparc64
• SDL 2
• GTK 3
• https://www.qemu.org/2018/08/15/qemu-3-0-0/

Qemu 2.12

• Initial support for Raspberry Pi 3 machine model
• Experimental support for two new virtualization accelerators: Apple's Hypervisor.framework ("-accel hvf") and Microsoft's Windows Hypervisor Platform Extensions ("-accel whpx")
• -nic 取代 -net 参数
  • -nic user -> -net nic -net user
• ChangeLog/2.12