ChangeLog/1.0: Difference between revisions
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== General == | == General == | ||
* i386-softmmu is no longer named ''qemu'' but instead referred to as ''qemu-system-i386'' for better consistency with other targets. A new tool is likely to be introduced that uses the ''qemu'' name so distributions are advised to not undo this change. | |||
* A new monitor command "info mtree" can show the hierarchy of memory regions in the guest. | |||
== Block devices (disks) == | |||
* QEMU now supports I/O latency accounting in the monitor command "info blockstats". | |||
* Errors are now tracked per device and are shown by the monitor command "info block". | |||
* All image formats now support asynchronous operation. IDE and SCSI emulation will use this feature, while other devices (notably floppy and SD) will not. | |||
=== IDE/ATAPI === | |||
* A large number of bugs were fixed regarding CD media change and tray locking. | |||
=== SCSI === | |||
* Memory management errors could crash QEMU when scsi-disk encountered I/O errors. Many instances of this problem were fixed. | |||
* The accuracy of error handling for SCSI emulation has been greatly improved. | |||
* SCSI devices can now be addressed by channel, target (id) and LUN. Not all emulated HBAs will support this feature (in particular, the LSI controller will not). | |||
* Block device pass through is now supported through a new scsi-block device. The scsi-block device works with block devices (like /dev/sda or /dev/sr0) rather than /dev/sgN devices, and is more efficient because it does not consume arbitrary amounts of memory when the guest does large data transfers. | |||
* SCSI CD-ROMs now report media changed events. | |||
* SCSI CD-ROMs now support DVD images. | |||
* Bugfixes for IDE media change also apply to SCSI. | |||
* SCSI devices now report a unit attention condition when the system is started or reset. This may cause problems with old firmware versions. | |||
== USB == | |||
== Spice == | |||
== User-mode networking (SLIRP) == | |||
* SLIRP can handle process ARP replies and gratuitous ARP requests from the guest. | |||
== virtio-9p == | |||
== ARM == | |||
* QEMU now supports VFPv4 fused multiply-accumulate instructions. | |||
* QEMU now supports UDIV and SDIV in ARM mode. | |||
== PPC == | |||
* | === pSeries == | ||
* sPAPR VIO devices can now be created with -device. | |||
== SPARC == | |||
== x86 == | |||
=== KVM === | |||
== | === Xen === | ||
Revision as of 08:58, 2 November 2011
General
- i386-softmmu is no longer named qemu but instead referred to as qemu-system-i386 for better consistency with other targets. A new tool is likely to be introduced that uses the qemu name so distributions are advised to not undo this change.
- A new monitor command "info mtree" can show the hierarchy of memory regions in the guest.
Block devices (disks)
- QEMU now supports I/O latency accounting in the monitor command "info blockstats".
- Errors are now tracked per device and are shown by the monitor command "info block".
- All image formats now support asynchronous operation. IDE and SCSI emulation will use this feature, while other devices (notably floppy and SD) will not.
IDE/ATAPI
- A large number of bugs were fixed regarding CD media change and tray locking.
SCSI
- Memory management errors could crash QEMU when scsi-disk encountered I/O errors. Many instances of this problem were fixed.
- The accuracy of error handling for SCSI emulation has been greatly improved.
- SCSI devices can now be addressed by channel, target (id) and LUN. Not all emulated HBAs will support this feature (in particular, the LSI controller will not).
- Block device pass through is now supported through a new scsi-block device. The scsi-block device works with block devices (like /dev/sda or /dev/sr0) rather than /dev/sgN devices, and is more efficient because it does not consume arbitrary amounts of memory when the guest does large data transfers.
- SCSI CD-ROMs now report media changed events.
- SCSI CD-ROMs now support DVD images.
- Bugfixes for IDE media change also apply to SCSI.
- SCSI devices now report a unit attention condition when the system is started or reset. This may cause problems with old firmware versions.
USB
Spice
User-mode networking (SLIRP)
- SLIRP can handle process ARP replies and gratuitous ARP requests from the guest.
virtio-9p
ARM
- QEMU now supports VFPv4 fused multiply-accumulate instructions.
- QEMU now supports UDIV and SDIV in ARM mode.
PPC
= pSeries
- sPAPR VIO devices can now be created with -device.