Documentation Virtualization Beat

USB Emulation

• Support for USB 2.0 (EHCI) devices has been added.

CDROM Emulation

• Many fixes to comply with the 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

Upstream release notes

• Update to qemu 0.15, refer upstream changes at http://wiki.qemu.org/ChangeLog/0.15

Xen

• Xen support merged into qemu

x86

• Stable guest TSC across migration
• Support for VIA CPU features

General

• Several memory leak fixes in all virtio devices

qemu-img

• The performance of qemu-img convert has been improved
• qemu-img convert and rebase now support the -p option which enables progress display

qcow2

• Improved the performance of creating/deleting internal snapshots

Guest Agent

• Added the guest agent that supports snapshotting,