ChangeLog/0.15

From QEMU

0.15.0

Targets

  • New targets added: LatticeMico32 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")

MIPS

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SH4

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PPC

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s390x

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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)

MIPS

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IA64

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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

PPC

  • ...

s390x

  • ...

Devices

IDE / AHCI

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SCSI

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USB

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virtio

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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

PCI/PCI Express

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Sound

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Video

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RTC

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

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

  • 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

Spice

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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

Retrieved from "https://wiki.qemu.org/index.php?title=ChangeLog/0.15&oldid=1576"