ChangeLog/2.2: Difference between revisions
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* QEMU is more resistent against failure of large allocations in the block layer | * QEMU is more resistent against failure of large allocations in the block layer | ||
* 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. | |||
== 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". | ||
Revision as of 10:04, 1 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
LM32
Microblaze
MIPS
PowerPC
IBM
Freescale
s390
SPARC
x86
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.
USB
VFIO
GUI
Monitor
Migration
Network
Block devices in system emulation
- Many fixes to AHCI emulation.
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.
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".
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).