ChangeLog/2.1

(as of commit e00fcfeab3d452cba3d0a08991a39ab15df66424)

System emulation

Future incompatible changes

• Three options are using different names on the command line and in configuration file. In particular:
  • The "acpi" configuration file section matches command-line option "acpitable";
  • The "boot-opts" configuration file section matches command-line option "boot";
  • The "smp-opts" configuration file section matches command-line option "smp".

Starting with QEMU xyz.jkl, -readconfig will standardize on the name for the command line option.

ARM

• Improvements to Allwinner SoC emulation.
• Initial support in TCG for EL2 and EL3.
• Much more complete support for AArch64.

LM32

Support for semihosting.

Microblaze

• Support for u-boot initrd images.

Power

• Support for VFIO (with guest-side IOMMU) on pSeries.

x86

• QEMU now presents version 0x14 for the emulated local APIC, for consistency with KVM and improved compatibility with Mac OS X.
• More faithful SMBus controller emulation.
• More faithful CPL (current privilege level) emulation in TCG mode.

Device emulation and assignment

SCSI

• Support for MSI and MSI-X in the megasas emulation.

USB

• Support for file-sharing via MTP emulation
• Host USB3 device can be attached to a EHCI (USB 2.0) controller in the guest

VFIO

• Support for RTL8168 NICs.

GUI

• Many bug fixes for the GTK+ interface.
• Mouse wheel support for the SDL 2.0 interface.

Monitor

• More commands support command-line completion.

Migration

• Many fixes to XBZRLE.

Block devices in system emulation

• Filenames can be JSON objects preceded by "json:", for example json:{'driver':'raw','file.filename':'test.img'}. This new syntax can be used in the file property for -drive, but also in qemu-io, qemu-img or backing file names.

Block devices and tools

• Support for compressed (streamOptimized) VMDK images as conversion targets.

TCG

• Improvement to AArch64, Alpha, ia64, MIPS, S390 and SPARC backends.

User-mode emulation

• Support for opening /proc/self/exe.