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Titel: QEMU v0.15.0  BeitragVerfasst am: 09.08.2011, 14:27 Uhr
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Eine neue Version des Open Source Machine Emulators QEMU, mit Untersützung für eine Vielzahl von Prozessoren, wurde veröffentlicht. Download hier: http://download.savannah.gnu.org/releases/qemu/. ChangeLog hier.


A new version of QEMU, an open source machine emulator for various CPUs, has been released. Download here: http://download.savannah.gnu.org/releases/qemu/, ChangeLog.

Zitat:
0.15.0
Targets
  • New targets added: Lattice Mico32 (LM32) and UniCore32.

ARM
  • Many bugs in Neon and other ARMv6 and ARMv7 instructions have been fixed
  • Floating point instructions now generally handle NaNs and floating point status flags correctly
  • Dummy implementations of cp15 performance counters and cp14 debug registers mean we can boot more recent Linux kernels that probe for these features
  • SA-1110/SA-1100 support has been added
  • New machine models: ARM Versatile Express (machine "vexpress-a9"), Sharp Zaurus SL-5500 (machine "collie")

LM32
  • Basic support for LM32 EVR evaluation board
  • Full-featured support for the Milkymist SoC including video rendering.
  • Almost complete opcode testsuite

SPARC
  • Sparc32: Improvements to OpenBIOS make Solaris 8 boot possible.
  • Sparc64: fix sdivx and udivx instructions, enabling booting HelenOS up to the command prompt (commit).
  • Minor Sparc32 and Sparc64 fixes.

Hosts
ARM
  • Support QEMU´s host C code being compiled in Thumb mode (as some gccs do by default)

KVM
Common
  • Countless fixes ported over from qemu-kvm, core is now shared with that tree, i.e. has the same quality
  • Pimped up threading model, now fully synchronized with qemu-kvm tree
  • Removed dependency on external kernel headers, all supported KVM features are now built into the binary

x86
  • Paravirtual kvmclock fixes
  • Stable guest TSC across migration
  • Support for SMEP CPU feature
  • Support for VIA CPU features
  • Reworked & fixed MCE support

Devices
virtio-serial
  • Various fixes for hot-unplug of ports
  • Disallow generic ports at id 0: port number 0 is reserved for console ports for backward compatibility; ´-device virtserialport,nr=0´ is now not allowed.
  • Allow re-use of a chardev after a port using it gets unplugged
  • Add trace events

RTC
  • MC146818 (for PCs): Follow host clock resets to the past immediately (instead of freezing the clock)

Balloon
  • Fix use-after-free bug that lead to qemu crash when ´balloon 0´ was issued in the monitor
  • Multiple balloon devices are now forbidden; it doesn´t make sense to have more than one device at a time.
  • Negative balloon values are now rejected. The previous behaviour was to silently deflate the balloon (negative values were parsed as very high positive values)
  • Fix memory leaks on exit or unplug of the virtio-balloon device
  • Fix migration after unplugging of the virtio-balloon device. Previously, the destination aborted migration for a missing section.

Block Layer
  • Added missing -drive options to the man page
  • Expose live snapshot support in QMP using the snapshot-blkdev-sync command (commit)
  • Fixed removable media support to not cache the media size. Before this fix, the guest OS would see the old CD-ROM size even after changing the medium. (commit)

qemu-img
  • qemu-img convert and rebase now support the -p option which enables progress display (commit)
  • qemu-img commit, convert and rebase now support the -t option which allows to specify a cache mode that should be used to open the image (commit)
  • The performance of qemu-img convert has been improved (commit)

Block Drivers
qcow2
  • Improved the performance of creating/deleting internal snapshots (commit)

qed
  • Support for growing images with qemu-img resize(commit)
  • Periodically flush and clear need check bit to reduce chance of leaving image files dirty on power failure (commit)
  • Fix consistency check on 32-bit hosts (commit)

VMDK
  • Support for the monolithicFlat subformat (commit)

Sheepdog
  • Can now preallocate images during creation (commit)

RBD
  • Use the higher level librbd instead of just librados (commit)

IDE Emulation
  • Added support for the TRIM command (commit)
  • Instead of the device ide-drive for both hard disks and CD-ROMs we have now separate ide-hd and ide-cd devices (commit)
  • Fixed confusion between the Busmaster IDE status register and internal error state, which could lead to crashes (commit)

CDROM Emulation
    li> Many fixes to comply with ATAPI specification
  • GET_EVENT_STATUS_NOTIFICATION: Implement ´media´ subcommand that helps report tray open/close, media present/absent states to guests. Newer Linux guests (kernels 2.6.38+) rely on this command to revalidate discs.
  • Major code refactoring and cleanup

virtio-blk
  • The serial number of the drive is now exposed as a qdev property (commit)

SCSI Disk Emulation
  • Instead of the device scsi-disk for both hard disks and CD-ROMs we have now separate scsi-hd and scsi-cd devices (commit)

Networking
User space (slirp)
  • Fixed DHCP support in restrict (host-only) mode
  • Ping packet forwarding to external hosts via unprivileged ICMP sockets of Linux 3.0

QMP / Monitor
  • Support for two new QMP commands: inject-nmi (commit) and snapshot-blkdev-sync (commit)
  • Fixed some issues with the JSON parser (several commits, first one here)
  • Added the guest agent (commit)

Tracing
  • Make simpletrace.py a Python module for trace analysis scripts (blog), (commit)
  • Make ´simple´ backend thread-safe (commit)
  • Add tracetool --probe-prefix optional argument to prefix DTrace probe names (commit)

Linux-user
  • Added support for ppoll, sched_{g,s}etaffinity, epoll, pselect6, prlimit64 syscalls
  • Add s390x and unicore32 linux-user targets
  • Fix loading binaries from Linux/sparc64 rootfs (commit)
  • Numerous bugfixes

New build dependencies (mandatory and optional)
  • glib-2.0 (mandatory)
  • libcurl 7.15.4 or better (optional, required for CURL block driver support)
  • spice 0.6.0 or better (optional)

Other stuff



Related links:
[ PC Emus / Virtual Machines ][ MAC Emus ]

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