ChangeLog/7.0

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Revision as of 17:25, 21 February 2022 by Pm215 (talk | contribs) (→‎Arm)

System emulation

Incompatible changes

Consult the 'Removed features' page for details of suggested replacement functionality

New deprecated options and features

Consult the "Deprecated Features" chapter of the QEMU System Emulation User's Guide for further details of the deprecations and their suggested replacements.

68k

Alpha

Arm

  • The virt board has gained a new control knob to disable passing a RNG seed in the DTB (dtb-kaslr-seed)
  • The AST2600 SoC now supports a dummy version of the i3c device
  • The virt board can now run guests with KVM on hosts with restricted IPA ranges
  • The virt board now supports virtio-mem-pci
  • The virt board now supports specifying the guest CPU topology
  • On the virt board, we now enable PAuth when using KVM or hvf and the host CPU supports it
  • xlnx-versal-virt now emulates the PMC SLCR
  • xlnx-versal-virt now emulates the OSPI flash memory controller
  • The Arm GICv3 ITS now emulates the previously missing MOVI and MOVALL commands
  • New board model: mori-bmc

AVR

Hexagon

HPPA

  • Support up to 16 virtual CPUs
  • Improved artist graphics driver for HP-UX VDE, HP-UX CDE and Linux framebuffer
  • Mouse cursor focus and positioning now works much better under HP-UX X11
  • Emulated TOC button can be triggered with "nmi" in the qemu monitor
  • Added support for Qemu SCSI boot order option
  • Possibility to change system HOSTID for HP-UX and Linux
  • Added firmware 16x32 pixel bitmap font for use on HDPI screens
  • Ability to choose serial or graphical console as default firmware console

Microblaze

MIPS

Nios2

OpenRISC

PowerPC

Renesas RX

Renesas SH

RISC-V

Extensions

  • Add support for ratified 1.0 Vector extension
  • Support for the Zve64f and Zve32f extensions
  • Drop support for draft 0.7.1 Vector extension
  • Support Zfhmin and Zfh extensions
  • RISC-V KVM support
  • Mark Hypervisor extension as non experimental
  • Enable Hypervisor extension by default
  • Support for svnapot, svinval and svpbmt extensions
  • Experimental support for 128-bit CPUs
  • Initial support for XVentanaCondOps custom extension
  • stval and mtval support for illegal instructions
  • Support for the UXL field in xstatus

Machines

  • OpenSBI binary loading support for the Spike machine
  • Improve kernel loading for non-Linux platforms
  • SiFive PDMA 64-bit support
  • Support 32 cores on the virt machine

Fixes

  • Fix illegal instruction when PMP is disabled
  • Corrections for the Vector extension
  • Fixes for OpenTitan timer
  • Correction of OpenTitan PLIC stride length
  • Removal of OpenSBI ELFs
  • Fix trap cause for RV32 HS-mode CSR access from RV64 HS-mode

s390x

SPARC

Tricore

x86

KVM

x86_64

AMD SEV

Xtensa

Device emulation and assignment

ACPI

Audio

Block devices

Graphics

I2C

Input devices

IPMI

Multi-process QEMU

Network devices

NVDIMM

NVMe

Emulated NVMe Controller

PCI/PCIe

SCSI

SD card

SMBIOS

TPM

USB

VFIO

virtio

Xen

fw_cfg

9pfs

virtiofs

  • Fix for CVE-2022-0358 - behaviour with supplementary groups and SGID directories
  • Improved security label support
  • The virtiofsd in qemu is now starting to be deprecated; please start using and contributing to Rust virtiofsd

Semihosting

Audio

Character devices

Crypto subsystem

Authorization subsystem

GUI

GDBStub

TCG Plugins

  • new coverage plugin in contrib which support drcov format traces

Host support

Memory backends

Migration

Monitor

QMP

HMP

Network

Block device backends and tools

  • A bug in caching block status has been fixed that was causing over-eager treatment of a format layer as all data rather than detecting holes, if an earlier block status query had merely been checking for which portions of the backing chain were allocated. While the bug did not affect guest-visible data, it caused some performance regressions, particularly noticeable and easy to trigger when using 'qemu-nbd --allocation-depth'.

Tracing

Miscellaneous

User-mode emulation

  • fixed a bug that caused issues mapping the ARM commpage on 32 bit builds

binfmt_misc

Hexagon

TCG

User-mode emulation (linux-user, bsd-user) will enforce guest alignment constraints and raise SIGBUS to the guest program as appropriate.

ARM

Support for for ARMv4 and ARMv5 hosts has been dropped. These older Arm versions do not have support for misaligned memory access; such support was added to ARMv6. Since ARMv5 is quite old, it is presumed that such systems do not have sufficient RAM to even run QEMU, and so practically speaking no systems are impacted.

Guest agent

  • Support Windows 11 for guest-get-osinfo command
  • Fix memory leaks in Windows guest-get-fsinfo command

Build Information

Python

GIT submodules

Container Based Builds

  • a large number of containers are now updated by lcitool

VM Based Builds

Build Dependencies

Windows

Testing and CI

Known issues