http://wiki.qemu.org/Index.html 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 Xen support merged (http://blog.xen.org/index.php/2011/05/13/xen-support-upstreamed-to-qemu/) --

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