ChangeLog/1.6

System emulation

If the kernel supports it, virtio-ccw supports ioeventfd and vhost when running on KVM.

Firmware can be exposed to the guest as a flash device (using -pflash) also when running on KVM.
In addition to the "xenfv" machine type, which is kept for backwards compatibility, Xen can now use the pc machine type (including versioned machine types) using "-M pc -machine accel=xen". Note that using PV-on-HVM drivers requires "-M pc -machine accel=xen -device xen-platform".

info block now returns different output for HMP. HMP is not a programmatic interface, please use QMP if you need a stable programmatic interface.

The "whitelist" that lets packagers specify which block device formats are supported by QEMU will now allow specifying formats that QEMU should only allow when opened as read-only. The --block-drv-whitelist configure option is thus split in two new options, --block-drv-rw-whitelist and --block-drv-ro-whitelist.
Support for a new block device background job. Started by drive-backup, it will backup a disk's content to a new file. Unlike drive-mirror, the new file will include the source disk's content at the time the backup job was started. Atomic backup of multiple disks is supported using the "transaction" QMP command.
Several bugfixes for VMDK and curl backends.
Support for thin provisioning ("discard") on qcow2 images. When a device is opened with "-drive ...,discard=on", discard requests from the guest are forwarded to the underlying file system or block device as is the case for "raw" format images.

Initial support for live migration over RDMA using "migrate x-rdma:HOST:PORT".

On Win32, the state directory will be placed under CSIDL_COMMON_APPDATA, which typically is "C:\Documents and Settings\All Users\Application Data".

linux-user does not support anymore *at system calls on glibc versions older than 2.5.
New TCG target for aarch64.
Build ARM, Microblaze and PPC targets will now use a bundled libfdt if the library is not available on the host.