ChangeLog/2.2: Difference between revisions
(→ABI breaking: remove, see incompatible changes) |
(as of 4f2280b2190e39aa6761cc8188626ed9aad350c1) |
||
| Line 9: | Line 9: | ||
=== ARM === | === ARM === | ||
* Support for loading a device tree even with no -kenel option or when booting ELF images | |||
* Support for input interrupts in the PL061 GPIO controller | |||
* TCG can emulate watchpoints. | |||
=== LM32 === | === LM32 === | ||
=== Microblaze === | === Microblaze === | ||
=== MIPS === | === MIPS === | ||
=== PowerPC === | === PowerPC === | ||
* Mac OS X 10.2, 10.3 and 10.4 guests run with the mac99 machine type. | |||
* Bugfixes and optimization for TCG emulation of PowerPC targets. | |||
==== IBM (pSeries) ==== | |||
* Support for the "nmi" monitor command, to enter the kernel debugger. | * Support for the "nmi" monitor command, to enter the kernel debugger. | ||
==== | ==== Freescale (BookE) ==== | ||
* Breakpoint support on KVM. | |||
=== s390 === | === s390 === | ||
* Support for boot from DASD. | |||
* Support for memory hotplug. | |||
=== SPARC === | === SPARC === | ||
* Emulation of TCX hardware acceleration. | |||
=== TriCore === | |||
* New target. | |||
=== x86 === | === x86 === | ||
* Support for IOMMU (VT-d) emulation on the Q35 machine type, enabled with "-machine iommu=on" | |||
==== KVM ==== | ==== KVM ==== | ||
<!-- * More robust live migration of the kvm pv clock --> | <!-- * More robust live migration of the kvm pv clock --> | ||
| Line 31: | Line 43: | ||
* Support for ARI forwarding on PCIe root ports. | * Support for ARI forwarding on PCIe root ports. | ||
==== USB ==== | ==== USB ==== | ||
* Support for hot-plugging XHCI/EHCI/UHCI controllers (in the case of EHCI/UHCI, only if there are no companion controllers) | |||
==== VFIO ==== | ==== VFIO ==== | ||
=== GUI === | === GUI === | ||
| Line 45: | Line 58: | ||
* Support for Parallels images larger than 2TB. | * Support for Parallels images larger than 2TB. | ||
* Network-based drivers (NBD, libiscsi, etc.) now work on Win32 hosts too. | * Network-based drivers (NBD, libiscsi, etc.) now work on Win32 hosts too. | ||
* qemu-img source cache option? | |||
* qemu-nbd has a new --detect-zeroes option. | |||
== TCG == | == TCG == | ||
* In icount mode, it is possible to slow down emulation to match the requested CPU frequency (thus ensuring that the host and guest clocks remain aligned). This is enabled with "-icount N,align=on". | * In icount mode, it is possible to slow down emulation to match the requested CPU frequency (thus ensuring that the host and guest clocks remain aligned). This is enabled with "-icount N,align=on". | ||
* A new "victim TLB" provides a 5-10% performance improvement. | |||
== Tracing == | == Tracing == | ||
* QEMU provides a SystemTap script that outputs binary trace data, for use in flight-recorder mode. The resulting traces can be parsed with QEMU's simpletrace.py script (using the --no-header command-line option). | * QEMU provides a SystemTap script that outputs binary trace data, for use in flight-recorder mode. The resulting traces can be parsed with QEMU's simpletrace.py script (using the --no-header command-line option). | ||
Revision as of 13:46, 24 September 2014
System emulation
Incompatible changes
Future incompatible changes
- Three options are using different names on the command line and in configuration file. In particular:
- The "acpi" configuration file section matches command-line option "acpitable";
- The "boot-opts" configuration file section matches command-line option "boot";
- The "smp-opts" configuration file section matches command-line option "smp".
- Starting with QEMU xyz.jkl, -readconfig will standardize on the name for the command line option.
ARM
- Support for loading a device tree even with no -kenel option or when booting ELF images
- Support for input interrupts in the PL061 GPIO controller
- TCG can emulate watchpoints.
LM32
Microblaze
MIPS
PowerPC
- Mac OS X 10.2, 10.3 and 10.4 guests run with the mac99 machine type.
- Bugfixes and optimization for TCG emulation of PowerPC targets.
IBM (pSeries)
- Support for the "nmi" monitor command, to enter the kernel debugger.
Freescale (BookE)
- Breakpoint support on KVM.
s390
- Support for boot from DASD.
- Support for memory hotplug.
SPARC
- Emulation of TCX hardware acceleration.
TriCore
- New target.
x86
- Support for IOMMU (VT-d) emulation on the Q35 machine type, enabled with "-machine iommu=on"
KVM
Xen
- QEMU can now boot a bzImage or multiboot kernel under Xen, using the command line option -kernel.
Xtensa
Device emulation and assignment
SCSI
- Passthrough of vendor-specific commands now works (only with the virtio-scsi HBA).
PCI/PCIe
- MSIs are now (correctly) disabled until bus master DMA is enabled for the device.
- Support for ARI forwarding on PCIe root ports.
USB
- Support for hot-plugging XHCI/EHCI/UHCI controllers (in the case of EHCI/UHCI, only if there are no companion controllers)
VFIO
GUI
Monitor
Migration
Network
Block devices in system emulation
- Many fixes to AHCI emulation.
- The list of functionality now supported in threaded virtio-blk backend is growing: new in 2.2 are resizing of disks, device hot-unplug, and the embedded NBD server.
Various
Block devices and tools
- Support for Archipelago as a QEMU block backend
- QEMU is more resistent against failure of large allocations in the block layer
- Support for Parallels images larger than 2TB.
- Network-based drivers (NBD, libiscsi, etc.) now work on Win32 hosts too.
- qemu-img source cache option?
- qemu-nbd has a new --detect-zeroes option.
TCG
- In icount mode, it is possible to slow down emulation to match the requested CPU frequency (thus ensuring that the host and guest clocks remain aligned). This is enabled with "-icount N,align=on".
- A new "victim TLB" provides a 5-10% performance improvement.
Tracing
- QEMU provides a SystemTap script that outputs binary trace data, for use in flight-recorder mode. The resulting traces can be parsed with QEMU's simpletrace.py script (using the --no-header command-line option).