ChangeLog/2.5

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Revision as of 11:10, 7 October 2015 by Paolo Bonzini (talk | contribs) (update as of 5fdb4671b08e0d1631447e81348b2b50a6b85bf7)

System emulation

Incompatible changes

  • The mips32r5-generic CPU was renamed to P5600

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".
-readconfig will standardize on the name for the command line option.
  • Behavior of automatic calculation of SMP topology when some SMP topology options for -smp are omitted (sockets, cores, threads) will change in the future. If guest ABI needs to be preserved on upgrades while using the SMP topology options, users should either set set all options explicitly (sockets, cores, threads), or omit all of them.
  • Image encryption is fatally flawed, and will be dropped entirely. It'll remain available only in qemu-img, so you can use 'qemu-img convert' to convert encrypted images to uncrypted ones.
  • Host floppy device pass-through (block driver "host_floppy") is deprecated, and will be dropped in a future release.
  • Block device parameter aio=native has no effect without cache.direct=on. It will be made an error.
  • A few devices will be configured with explicit properties instead of implicitly. Unlikely to affect users; for the full list, see the 2.3 ChangeLog.
  • QMP command blockdev-add is still a work in progress. It doesn't support all block drivers, it lacks a matching blockdev-del, and more. It might change incompatibly.

Alpha

ARM

  • The "virt" machine type supports passing SMBIOS to the firmware.
  • Semihosting support on AArch64
  • New i.MX31 SoC.
  • The ZynqMP platform supports AHCI.
  • Support for VGICv3 in KVM

MIPS

  • The mips32r5-generic CPU was renamed to P5600

PowerPC

  • Support for memory hotplug on pSeries guests
  • The shipped version of SLOF includes GPT support.

s390

  • Storage keys are migrated.
  • New "info skeys" command in HMP to dump the storage key for a given address.
  • Support for virtio 1.0 in the virtio-ccw devices.

SH

SPARC

TileGX

  • New target.

x86

KVM

  • Support for Hyper-V-compatible reporting of crashes.

Xen

  • Support for passthrough of Intel integrated GPUs.

Device emulation and assignment

ACPI

Audio

Block devices

Character devices

IDE

Mouse/keyboard

Network

SCSI

  • scsi-generic devices now can be used together with a "readonly=on" backend.

PCI/PCIe

TPM

VFIO

virtio

VGA

Character devices

GUI

  • New syntax for enabling TLS in the VNC server:
    • Equivalent to -vnc hostname:0,tls: -object tls-creds-anon,id=tls0,endpoint=server -vnc hostname:0,tls-creds=tls0
    • Equivalent to -vnc hostname:0,tls,x509=/path/to/certs: -object tls-creds-x509,id=tls0,endpoint=server,dir=/path/to/certs,verify-peer=no -vnc hostname:0,tls-creds=tls0
    • Equivalent to -vnc hostname:0,tls,x509verify=/path/to/certs: -object tls-creds-x509,id=tls0,endpoint=server,dir=/path/to/certs,verify-peer=yes -vnc hostname:0,tls-creds=tls0
  • The Cocoa GUI does not have show an 'open image file' dialog box anymore even if QEMU is started without arguments

Monitor

  • New "info iothreads" command.
  • New "query-qmp-schema" command allows the caller to introspect the QMP schema used by QEMU.

Migration

Network

  • Support for multiqueue in vhost-user.

Block devices in system emulation

Command-line options

TCG

Block devices and tools

  • New "reopen" command in qemu-io.

Audio

Guest agent

  • Support for dumping the configuration current file with --dump-conf
  • Win32 support for guest-set-user-password

User-mode emulation

  • The configure option --disable-guest-base has been removed.

Build dependencies

Known issues

  • SDL audio only works with SDL 1.x.
  • 64-bit QEMU crashes on Windows (Fix)