Incompatible changes
All onboard buses now have distinct names, so that all of them can be reached with "-device bus=...". As a result of this, some buses that used to have duplicates got renamed:
i2c-bus.0 to i2c-bus.1 for machines n800, n810;
virtio-mmio-bus.0 to virtio-mmio-bus.3 for vexpress-a15, vexpress-a9;
virtio-mmio-bus.0 to virtio-mmio-bus.31 for virt;
usb-bus.0 to usb-bus.1 for xilinx-zynq-a9, fulong2e;
ide.0 to ide.1 for isapc, mips, g3beige, mac99, prep;
This change requires care when doing migration from 1.x to 2.x QEMU; you need to specify bus=NEW explicitly on the destination for devices on the renamed bus.
Another bus rename is pci to pci.0 for pseries. This does not require as much care on migration; if you were specifying "bus=pci" explicitly, QEMU will not start unless you change that to "bus=pci.0".
qemu-system-arm no longer defaults to the obsolete "integratorcp" if no machine is specified on the command line (this was a recurring source of confusion). Users with existing integratorcp images will need to add "-M integratorcp" to the command line if it is not already present.
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 2.1, -readconfig will standardize on the name fo the command line option.
ARM
Support for "-M virt", a board type that only uses virtio devices
Support for "-cpu host" when running under KVM
Support for new 32-bit mode ARMv8 instructions in TCG
Support for all 64-bit mode ARMV8 user-accessible instructions except for the optional CRC and crypto extensions
Support for AArch64 disassembling (requires a C++ compiler to be installed on the host)
Initial support for KVM on AArch64 systems (some features such as migration are not yet implemented)
Support for the Canon PowerShot A1100 DIGIC board using "-M canon-a1100"
Support for the allwinner-a10-based board "-M cubieboard"
Support for flow control in the Cadence UART
"integratorcp" is no longer the default machine (see the 'incompatible changes' section above)
Power
Support for Altivec 2.07 and VSX instructions when running under TCG
Support for ISA 2.06 "load/store quadword instructions", "divide extended instructions" and "floating-point test instructions" when running under TCG
PReP is not anymore (incorrectly) included in qemu-system-ppcemb
Improved support for "-nodefaults" on the pSeries machine. Display devices created with "-device VGA" will be handled correctly in the device tree.
Support for boot order in pSeries emulation
s390
Support for adapter interrupts in virtio-cc2
SPARC
Support for Sun CG3 framebuffer with the Sun4m machine. The CG3 framebuffer can be requested with "-vga cg3".
Support for the CASA compare-and-swap instruction in TCG.
x86
On the Q35 machine, the HPET interrupt can now be attached to GSIs 16-23, like on real hardware.
The Q35 machine now supports CPU hotplug.
Two flash chips can be specified using the "-drive if=pflash" or "-pflash" options twice.
Memory layout has changed slightly; to improve performance, the PIIX4 machine ("-M pc") now has 3GB of low memory instead of 3.5GB if the guest has more than 3.5GB of memory. Similarly, the Q35 machine ("-M q35") now has 2GB instead of 2.75GB of low memory if the guest has more than 2.75GB of overall memory.
Support for migration of Intel MPX registers.
The Apple SMC device is now exposed in the ACPI tables.
On the PIIX machine, PCI hotplug now supports devices behind a bridge (only for bridges not added by hotplug; hot-plugged bridges can still use the PCI Standard Hot-Plug Controller).
Support for the Hyper-V reference time counter via the "hv-time" suboption of "-cpu". This can improve performance of Windows guests substantially for applications that do many floating-point or SIMD operations. (Requires KVM and Linux 3.14).
The distributed qemupciserial.inf file now allows installing multiport PCI serial devices on Windows too.
ACPI tables generated by QEMU can now be used by OVMF firmware. OVMF starting with SVN r15420 is needed. In particular hotplug, pvpanic device and other ACPI based features now work for OVMF.
KVM
x2apic is now enabled by default when KVM is in use.
Xen
PCI passthrough of devices with a ROM now works.
Xtensa
added support for ML605 and KC705 FPGA boards.
Cache-related opcodes now correctly check privilege level/memory accessibility.
either because they themselves are not ready or because a
dependency isn't. This is annotated by
PYTHON_VERSIONS_INCOMPATIBLE= 33 # not yet ported as of x.y.z
or
PYTHON_VERSIONS_INCOMPATIBLE= 33 # py-foo, py-bar
respectively, please use the same style for other packages,
and check during updates.
Use versioned_dependencies.mk where applicable.
Use REPLACE_PYTHON instead of handcoded alternatives, where applicable.
Reorder Makefile sections into standard order, where applicable.
Remove PYTHON_VERSIONS_INCLUDE_3X lines since that will be default
with the next commit.
Whitespace cleanups and other nits corrected, where necessary.
Changes:
System emulation
Device emulation
Audio
The HDA device emulation now includes a mixer by default.
Previously this had to be enabled with the configure argument
"--enable-mixemu" when building QEMU.
Audio will work correctly on systems without OSS (/dev/dsp).
On previous versions, those systems needed special arguments
to "configure" for audio to work out of the box.
Audio honors the QEMU_AUDIO_TIMER_PERIOD environment variable
and has less CPU utilization by default than previous versions.
Block devices
Support for the LSI 53C810 SCSI HBA, which unlike the 895A is
supported on some very old Windows NT versions.
Device assignment
VFIO now supports setting CPU affinity on MSI interrupts.
VFIO can now reset assigned devices much more reliably using
either PCI function-level reset (FLR), power management, or a
reset (done by the kernel) of the parent bridge.
Several improvements to the reliability of using option ROMs
for devices that are assigned with VFIO.
USB
Performance and functionality improvements for USB 3.0.
MicroBlaze
Can now specify an initrd on the command line.
PowerPC
PowerPC now supports the dump-guest-memory command.
s390x
The "nmi" command will trigger a crash dump from kdump, using
a RESTART interrupt.
The SCLP line-mode console ("operating system messages") can
be accessed with "-device sclplmconsole".
x86
ACPI tables can be generated by QEMU and can be used by firmware
directly. This will in the future enable new features without
modifications of all firmware components (SeaBIOS, OVMF,
CoreBoot)
Initial support for supporting more than 1TB of RAM (but firmware
does not yet support this).
Xen HVM domains can now resume from suspend-to-RAM (S3) state.
Monitor
Subcommands (like "info block") can now autocomplete their
options.
Help for a single subcommand can be printed with a monitor
command such as "help info block".
New commands "blockdev-snapshot-internal-sync",
"blockdev-snapshot-delete-internal-sync" improve support for
internal qcow2 snapshot.
New command "blockdev-add" provides a QMP interface for block
device hotplug.
Block devices
The throttling algorithm has been rewritten; the new code is
more robust, and supports configuration of separate limits for
sustained I/O vs. I/O bursts
Migration
Migration was broken from QEMU <= 1.5 to 1.6; the new release
fixes it.
User-mode emulation
M68K ColdFire emulation supports atomic system calls.
Block devices, qemu-img, qemu-io
The sheepdog driver supports automatic reconnect after network
errors
The VMDK driver supports files produced by VMWare ESX.
The qcow2 driver can detect some cases of corruption, and will
prevent writing to a corrupted image.
The VHDX driver supports creating and writing .vhdx images.
The metadata of a file (where each sector of the guest image
is stored in the file on the host) can be dumped in human-readable
or JSON format using a new command "qemu-img map".
Guest agent
The "filesystem freeze/thaw" commands are now supported on
Windows too, where they will invoke the native Volume Shadow
Copy Service (VSS).
Miscellaneous
For targets that have no embedded disassembler, QEMU will now
produce hexadecimal dumps instead of just emitting an error
when a disassembly is requested. The enclosed script disas-objdump.pl
can be used, together with an external objdump program, to
convert the dump to a readable disassembly.
Host support
TCG now runs on x32 hosts.
Known issues
On Win32, QEMU must be compiled with --disable-coroutine-pool
to work around a suspected compiler bug.
The GTK terminal windows (monitor, serial console, parallel,
...) are still unusable in TCG mode: they lose characters and
can raise deadlocks.
Block devices
* New device "nvme" provides a PCI device that implements the NVMe standard.
* Fix for a possible data loss on crashes with IDE disks (due to mishandling of FLUSH requests)
Device assignment
* Legacy PCI assignment supports CPU affinity for MSI interrupts.
USB
* The XHCI (USB 3.0) controller supports live migration.
PCI
* ACPI hotplug of devices behind a PCI bridge is supported.
ARM
* The 32-bit ARMv8 LDA/STL instructions for load-acquire/store-release are supported (only with -cpu any); the remainder of the new v8 instructions will follow in a future release.
* The vexpress-a9 and vexpress-a15 boards have experimental support for virtio devices via a virtio-mmio transport. Note that the virtio command lines used with x86 systems won't work as they will create PCI virtio devices; use the devices "virtio-blk-device", "virtio-net-device", etc instead. Note that this functionality may change in future releases.
* The -initrd option now accepts ramdisks with a U-Boot header.
* A model of the Calxeda ECX-2000 / Midway system is now supported ("midway").
PPC
* Mac OS X guests supported (10.2-10.4 for PPC, 10.4 for PPC64)
* pSeries guests support live migration and savevm.
s390x
* If the kernel supports it, virtio-ccw supports ioeventfd and vhost when running on KVM.
* The dump-guest-memory command is supported.
SPARC
* Sun4c and Sun4d architectures and related CPUs were not fully implemented and have been removed.
* 24-bit display mode works
x86
* 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".
* QEMU can expose the full set of ACPI tables to the guest: See Features/ACPITableGeneration
* Conroe, Penryn and Nehalem CPUs have had their CPUID values fixed
* "-M isapc" now works on KVM too.
* -pflash can be used with KVM too.
more...
pkgsrc changes:
- remove now unnecessary SUBST for audio.h conflicts
- update PLIST for new files
- adjust patches for hw directory reorganization
- update counting semaphore patches per comments on qemu-devel
Upstream changes:
Changes mentioned in 1.5.1 announcement:
http://lists.nongnu.org/archive/html/qemu-devel/2013-06/msg04798.html
295d81c: Update VERSION for 1.5.1 release (Anthony Liguori)
cc0bd7e: wdt_i6300esb: fix vmstate versioning (Michael Roth)
12e5b2b: virtio-rng: Fix crash with non-default backend (Cole Robinson)
cb55efe: iscsi: reorganize iscsi_readcapacity_sync (Paolo Bonzini)
1b94fc4: iscsi: simplify freeing of tasks (Paolo Bonzini)
5e690bb: vhost-scsi: fix k->set_guest_notifiers() NULL dereference (Stefan
Hajnoczi)
129db36: scsi-disk: scsi-block device for scsi pass-through should not be
removable (Pavel Hrdina)
637d640: scsi-generic: check the return value of bdrv_aio_ioctl in
execute_command (Pavel Hrdina)
9c4f5dd: scsi-generic: fix sign extension of READ CAPACITY(10) data (Paolo
Bonzini)
3abd71c: scsi: reset cdrom tray statuses on scsi_disk_reset (Pavel Hrdina)
5fcb9bf: nbd: strip braces from literal IPv6 address in URI (Jan Tomko)
6c8cf5f: qemu-socket: allow hostnames starting with a digit (Jan Tomko)
ce4e8f0: vmdk: byteswap VMDK4Header.desc_offset field (Stefan Hajnoczi)
c683f1b: target-i386: cpu: Fix potential buffer overrun in
get_register_name_32() (Igor Mammedov)
75e4aa9: pc: Fix crash when attempting to hotplug CPU with negative ID (Igor
Mammedov)
055a7fc: smbios: Check R in -smbios type=0, release=R parses okay (Markus
Armbruster)
93bc624: smbios: Fix -smbios type=0, release=... for big endian hosts (Markus
Armbruster)
61fbaee: smbios: Clean up smbios_add_field() parameters (Markus Armbruster)
685ee2d: smbios: Convert to error_report() (Markus Armbruster)
fa0f47d: log.h: Supply missing includes (Markus Armbruster)
7552569: error-report.h: Supply missing include (Markus Armbruster)
02d2672: tcg-ppc64: rotr_i32 rotates wrong amount (Anton Blanchard)
2917f6b: tcg-ppc64: Fix add2_i64 (Anton Blanchard)
9534f66: tcg-ppc64: bswap64 rotates output 32 bits (Anton Blanchard)
d208f05: tcg-ppc64: Fix RLDCL opcode (Anton Blanchard)
6b6f105: ivshmem: add missing error exit(2) (Stefan Hajnoczi)
3202c02: Makefile: Install qemu-img and qemu-nbd man pages only if built
(Andreas Farber)
5a893b0: tap: fix NULL dereference when passing invalid parameters to tap
(Jason Wang)
0817fa9: create qemu_openpty_raw() helper function and move it to a separate
file (Michael Tokarev)
5810174: blockdev: reset werror/rerror on drive_del (Stefan Hajnoczi)
eeaa8d3: q35: set fw_name (Michael S. Tsirkin)
c127070: target-i386: Fix aflag logic for CODE64 and the 0x67 prefix (Richard
Henderson)
252a7c6: qemu-char: don't issue CHR_EVENT_OPEN in a BH (Michael Roth)
6f3718c: xilinx_axidma: Do not set DMA .notify to NULL after notify (Wendy
Liang)
1fb147f: virtio-ccw: Fix unsetting of indicators. (Cornelia Huck)
72762f2: s390x/css: Fix concurrent sense. (Cornelia Huck)
31ba701: ui/gtk.c: Fix *BSD build of Gtk+ UI (Brad Smith)
9ca80c7: vmxnet3: fix NICState cleanup (Stefan Hajnoczi)
a548bac: Fix usage of USB_DEV_FLAG_IS_HOST flag. (Michael Marineau)
9b5751e: host-libusb: Correct test for USB packet state (Ed Maste)
032ce1b: qdev: fix get_fw_dev_path to support to add nothing to fw_dev_path
(Amos Kong)
baa8a8b: do not check pointers after dereferencing them (Paolo Bonzini)
327e75b: xen: start PCI hole at 0xe0000000 (same as pc_init1 and
qemu-xen-traditional) (Stefano Stabellini)
9e7fdaf: Remove OSS support for OpenBSD (Brad Smith)
d503afb: target-i386: fix abort on bad PML4E/PDPTE/PDE/PTE addresses (Luiz
Capitulino)
5b3ca29: update seabios to release 1.7.2.2 (Gerd Hoffmann)
7b9cdc5: Revert "roms: switch oldnoconfig to olddefconfig" (Gerd Hoffmann)
0565700: ide: Set BSY bit during FLUSH (Andreas Farber)
ddaa83e: chardev: fix "info chardev" output (Gerd Hoffmann)
38ec6c1: xen_machine_pv: do not create a dummy CPU in machine->init (Stefano
Stabellini)
951411f: main_loop: do not set nonblocking if xen_enabled() (Stefano Stabellini)
5c26608: xen: simplify xen_enabled (Stefano Stabellini)
3541912: qom/object: Don't poll cast cache for NULL objects (Peter Crosthwaite)
749806d: rtl8139: flush queued packets when RxBufPtr is written (Stefan
Hajnoczi)
a6fc2cd: hw/9pfs: use O_NOFOLLOW for mapped readlink operation (Aneesh Kumar
K.V)
eabdf85: hw/9pfs: Fix segfault with 9p2000.u (Aneesh Kumar K.V)
Changelog 1.5:
http://wiki.qemu.org/ChangeLog/1.5
General
-------
- The default for log output enabled via the '-d' command line switch is now
standard error rather than a file. You can obtain the previous behaviour
using the '-D' command line switch to specify a file to send the logging to.
- QEMU now uses poll rather than select, and thus does not have any
restriction on the number of open file descriptors.
System emulation
----------------
Device emulation
Audio
- The --audio-card-list configure option is not used anymore. Instead, you
can modify default-configs/pci.mak (for the PCI soundcards AC97, HDA and
ES1370) and default-configs/sound.mak (for the ISA soundcards) before
running "make".
- The "shortcut" -soundhw option is now available for all targets that have
a PCI bus.
Device assignment
- VFIO supports primary VGA passthrough using the experimental "x-vga=on"
option. The following devices seem to work: Nvidia 8400gs, 73001e, NVS290;
ATI/AMD Radeon HD5450 and HD7850.
- VFIO devices support the bootindex= property to override the default boot
order for assigned PCI devices.
USB
- Experimental support for USB 3.0 streams, both in the nec-usb-xhci
controller and in the usb-uas USB-attached SCSI device emulation.
- USB device passthrough has been rewritten to use libusb. For Linux, the
two backends can be compiled in a single QEMU executable (if libusb is
enabled, usb-host-linux will be the legacy implementation, usb-host will
be the libusb-based one; if libusb is disabled, usb-host will be the
legacy implementation). For BSD, it has to be chosen at configure time
using --enable/disable-libusb (the default is to use libusb if it is
available, otherwise use the legacy implementation).
SCSI
- QEMU can now emulate the VMware PVSCSI device using "-device pvscsi".
- QEMU can now use tcm_vhost, a virtio-scsi device model based on the
Linux-iSCSI implementation of SCSI.
Network cards
- QEMU can now emulate the VMware paravirtualized network card using
"-device vmxnet3".
ARM
- This release has initial support of KVM for the ARM architecture.
This requires a 3.9 or better Linux kernel and a Cortex-A15 CPU.
- The Zynq board provides a SD host controller interface.
- The PCI controller model for VersatilePB and Realview boards has been
significantly improved in functionality (including MMIO BAR support and
a correct PCI IRQ mapping). Note that Linux kernels currently do not take
advantage of this; however we autodetect kernels that expect the behaviour
of an old broken QEMU and fall back to that. (The old IRQ behaviour can
be forced with "-global versatile_pci.broken-irq-mapping=1" if absolutely
necessary.)
- Incorrect handling of the SRS instruction in Thumb mode has been fixed.
- Performance of TCG emulation of ARM targets is improved over previous
releases.
- Migration and vm save/load now works correctly on the vexpress-a15 and
vexpress-a9 models.
PPC
- Various improvements to TCG code generation
- KVM synchronizes more state
- Fix a few issues that blocked Mac OS X from working (still not 100% there
though!)
- Refactoring and improvement of soft mmu emulation for book3s
- Implement various new instructions for ISA 2.05 and ISA 2.06 compatibility
(-cpu POWER7)
- Implement support for KVM based e500 family watchdog
s390x
- Various accuracy fixes for device emulation
- Faster I/O hypercalls
- Add firmware to boot from virtio-ccw disks
- Guest kernel panics are notified to the host
SPARC
- Improve sun4u interrupt mapping, so that multiple PCI devices can be used
simultaneously
x86
- x86 supports emulation of a TPM (Trusted Platform Module) on machines
that have a hardware TPM
- Various speedups in TCG emulation of x86
- The iPXE ROMs that are distributed with QEMU support EFI
- TCG supports the SSE4.1, SSE4.2, PCLMULQDQ, AES-NI, BMI and ADX extensions.
- A paravirtual device is included that lets the guest notifies kernel
panics to the host.
- CPU hot-add support with cpu-add QMP command. More details
Features/CPUHotplug.
- new CPU properties "feature-words" and "filtered-features" to allow
introspection of supported and not supported CPU features.
- For reference and examples of how the new properties can be used by
libvirt and other components, see:
http://wiki.qemu.org/Features/CPUModels#Interfaces.2Frequirements_for_libvirt
QMP
- QEMU now generates a DEVICE_DELETED event when the guest acknowledges
a device hot-unplug operation.
- Much better handling for non-ASCII codepoints in JSON strings
Character devices
- Character devices gained support for flow control. More details in
Features/ChardevFlowControl
- All kinds of character devices can now be hot-plugged. Character device
hotplug is also supported from the "human" monitor.
Block devices
- IDE and SCSI disks always have the ability to issue "discard" (aka TRIM or
UNMAP) commands. However, by default "discard" commands are silently
ignored as they can cause performance degradation and fragmentation.
To enable them, the "-drive" option now supports a "discard" suboption;
the default value is "ignore" (or its synonym "off"), and the other valid
value is "unmap" (or "on").
- Sheepdog drives can also be specified with URIs.
- iSCSI disks support on-line resizing using block_resize. Similar to block
devices, the resize has to be done first outside QEMU.
- Various performance improvements in qcow2 internal snapshots (savevm).
- The NBD backend has improved latency.
- qemu-nbd can now skip image format probing using the -f/--format
command-line option.
- VHDX (MS Hyper-V) image format has initial read-only support. Dynamic and
fixed sized disks are supported, but not differencing images (e.g. VHDX
images with a backing file). Read-only is strictly enforced, and the
'readonly=on' option must be used for any VHDX images.
- Secure Shell (ssh) support. Access remote disks over ssh using
qemu -drive file=ssh://host/path/to/file
Live Migration
- Further improvements in throughput (up to +130%: 4.2 Gbps in 1.5 vs
1.8 Gbps in 1.4) and latency.
User interface
- QEMU now provides a GTK+ interface. The interface uses the VTE library
to provide better terminal emulation for serial consoles and the monitor.
- A new VNC extension has been added to communicate LED state changes for
the keyboard.
VNC
- Websocket connections can now be encrypted with TLS.
User-mode emulation
-------------------
- Threaded programs are now more stable, though still experimental.
Guest agent
-----------
- New commands in qemu-ga let the host put CPUs online/offline with help
from the guest OS (Linux only)
- Low impact CVE-2013-2007 ("qemu: guest agent creates files with insecure
permissions in daemon mode") is fixed.
- Note for guest administrators: unix domain sockets, logfiles etc.
created by previous versions of qemu-ga do not have their file mode
bits reset by this change; only newly created files have mode 0600
when daemonizing. Please delete your old files or change their
permissions manually when upgrading.
- The guest-file-open QMP command continues to create files with mode
0666 for compatibility reasons.
Host support
------------
- QEMU is now a lot faster on Windows hosts than in previous versions
- libcacard has been ported to Windows.
Known issues
- The GTK+ backend does not compile on BSD systems (including Mac OS X).
This will likely be fixed in a later stable update.
pkgsrc changes:
- update PLIST for new files
- update patches (adjust lines, update comments)
- remove unnecessary files from subst list
XXX1: tested only on NetBSD/i386 6.1 and NetBSD/amd64 6.1
XXX2: needs to investicate hangup in pthread_cond_timedwait(3) on NetBSD
under load of multiple disk xfers (1.3.1 had the similar problem)
Upstream changes:
Changes mentioned in 1.4.2 announcment:
http://lists.nongnu.org/archive/html/qemu-stable/2013-05/msg00095.html
89400a8: update VERSION for 1.4.2 (Michael Roth)
e85b521: ppc: do not register IABR SPR twice for 603e (Herve Poussineau)
f890185: hw/9pfs: use O_NOFOLLOW for mapped readlink operation (Aneesh Kumar
K.V)
745f6c0: hw/9pfs: Fix segfault with 9p2000.u (Aneesh Kumar K.V)
0182df5: rbd: add an asynchronous flush (Josh Durgin)
7f28f0f: qemu-iotests: add tests for rebasing zero clusters (Paolo Bonzini)
45bbe1f: virtio-balloon: fix integer overflow in BALLOON_CHANGE QMP event (Luiz
Capitulino)
06efdc4: qemu-timer: move timeBeginPeriod/timeEndPeriod to os-win32 (Paolo
Bonzini)
0c70b5a: configure: Don't fall back to gthread coroutine backend (Brad Smith)
b90fd15: usb-redir: Fix crash on migration with no client connected (Hans de
Goede)
7322cb1: docs: Fix generating qemu-doc.html with texinfo 5 (Cole Robinson)
1d7723f: qga: unlink just created guest-file if fchmod() or fdopen() fails on
it (Laszlo Ersek)
67b460a: qga: distinguish binary modes in "guest_file_open_modes" map (Laszlo
Ersek)
84247bb: translate-all.c: Remove cpu_unlink_tb() (Peter Maydell)
2ebcc59: Handle CPU interrupts by inline checking of a flag (Peter Maydell)
69001b3: cpu-exec: wrap tcg_qemu_tb_exec() in a fn to restore the PC (Peter
Maydell)
3accab7: tcg: Document tcg_qemu_tb_exec() and provide constants for low bit
uses (Peter Maydell)
6025953: qga: set umask 0077 when daemonizing (CVE-2013-2007) (Laszlo Ersek)
93399d0: tcg/optimize: fix setcond2 optimization (Aurelien Jarno)
074dd56: target-mips: Fix accumulator arguments to gen_helper_dmult(u) (Richard
Sandiford)
d10d251: configure: Pick up libseccomp include path (Andreas Faber)
5613bda: virtio-ccw: Check indicators location. (Cornelia Huck)
c5675a9: tap: properly initialize vhostfds (Jason Wang)
e355efd: rng random backend: check for -EAGAIN errors on read (Amit Shah)
4d7f455: qdev: Fix QOM unrealize behavior (Andreas Farber)
0486c27: nbd: unlock mutex in nbd_co_send_request() error path (Stefan Hajnoczi)
Changes mentioned in 1.4.1 announcment:
http://lists.nongnu.org/archive/html/qemu-stable/2013-04/msg00071.html
57105f7: update VERSION for 1.4.1 (Michael Roth)
6e88653: Add -f FMT / --format FMT arg to qemu-nbd (Daniel P. Berrange)
6d0b135: target-mips: Fix accumulator selection for MIPS16 and microMIPS
(Richard Sandiford)
d89f9ba: Allow clock_gettime() monotonic clock to be utilized on more OS's
(Brad Smith)
46f9071: target-i386: Check for host features before filter_features_for_kvm()
(Eduardo Habkost)
f85e082: help: add docs for missing 'queues' option of tap (Jason Wang)
da78a1b: compiler: fix warning with GCC 4.8.0 (Paolo Bonzini)
2b92aa3: block: complete all IOs before resizing a device (Peter Lieven)
e4cce2d: Revert "block: complete all IOs before .bdrv_truncate" (Peter Lieven)
d15b1aa: qxl: better vga init in enter_vga_mode (Gerd Hoffmann)
65fe29e: doc: Fix texinfo @table markup in qemu-options.hx (Markus Armbruster)
888e036: acpi: initialize s4_val used in s4 shutdown (Bruce Rogers)
d019dd9: target-mips: fix rndrashift_short_acc and code for EXTR_ instructions
(Petar Jovanovic)
dac077f: target-mips: fix DSP overflow macro and affected routines (Petar
Jovanovic)
b09a673: target-mips: fix for sign-issue in MULQ_W helper (Petar Jovanovic)
79a4dd4: target-mips: fix for incorrect multiplication with MULQ_S.PH (Petar
Jovanovic)
57e929c: usb-tablet: Don't claim wakeup capability for USB-2 version (Hans de
Goede)
27c7135: chardev: clear O_NONBLOCK on SCM_RIGHTS file descriptors (Stefan
Hajnoczi)
283b7de: qemu-socket: set passed fd non-blocking in socket_connect() (Stefan
Hajnoczi)
a1cb89f: net: ensure "socket" backend uses non-blocking fds (Stefan Hajnoczi)
68f9df5: oslib-posix: rename socket_set_nonblock() to qemu_set_nonblock()
(Stefan Hajnoczi)
0135796: update seabios to 1.7.2.1 (Gerd Hoffmann)
799a34a: linux-user/syscall.c: Don't warn about unimplemented get_robust_list
(Peter Maydell)
8378910: linux-user: make bogus negative iovec lengths fail EINVAL (Peter
Maydell)
7a238b9: linux-user: fix futex strace of FUTEX_CLOCK_REALTIME (John Rigby)
02493ee: linux-user/syscall.c: handle FUTEX_WAIT_BITSET in do_futex (John Rigby)
7d47b24: qcow2: flush refcount cache correctly in qcow2_write_snapshots()
(Stefan Hajnoczi)
02ea844: qcow2: flush refcount cache correctly in alloc_refcount_block()
(Stefan Hajnoczi)
0fcf00b: page_cache: fix memory leak (Peter Lieven)
5610ef5: Fix page_cache leak in cache_resize (Orit Wasserman)
7a687ae: virtio-blk: fix unplug + virsh reboot (Christian Borntraeger)
b91aee5: ide/macio: Fix macio DMA initialisation. (Mark Cave-Ayland)
e09b99b: target-ppc: Fix CPU_POWERPC_MPC8547E (Andreas Farber)
611c7f2: pseries: Add cleanup hook for PAPR virtual LAN device (David Gibson)
4e4566c: configure: Require at least spice-protocol-0.12.3 (Michal Privoznik)
43e0061: qemu-bridge-helper: force usage of a very high MAC address for the
bridge (Paolo Bonzini)
3c3de7c: virtio-ccw: Queue sanity check for notify hypercall. (Cornelia Huck)
b0da310: tcg: Fix occasional TCG broken problem when ldst optimization enabled
(Yeongkyoon Lee)
d26efd2: qga/main.c: Don't use g_key_file_get/set_int64 (Peter Crosthwaite)
f305d50: qemu-ga: use key-value store to avoid recycling fd handles after
restart (Michael Roth)
d3652a1: qcow2: make is_allocated return true for zero clusters (Paolo Bonzini)
5194350: pseries: Add compatible property to root of device tree (David Gibson)
4d1cdb9: Allow virtio-net features for legacy s390 virtio bus (Christian
Borntraeger)
c3b81e0: rtc-test: Fix test failures with recent glib (Cole Robinson)
99b1f39: scsi-disk: do not complete canceled UNMAP requests (Paolo Bonzini)
f23ab03: scsi: do not call scsi_read_data/scsi_write_data for a canceled
request (Paolo Bonzini)
0c918dd: iscsi: look for pkg-config file too (Paolo Bonzini)
a8b090e: scsi-disk: handle io_canceled uniformly and correctly (Paolo Bonzini)
4a38944: qemu-ga: make guest-sync-delimited available during fsfreeze (Michael
Roth)
b7ff1a7: qmp: netdev_add is like -netdev, not -net, fix documentation (Markus
Armbruster)
d49fed4: vga: fix byteswapping. (Gerd Hoffmann)
cebb8eb: help: add docs for multiqueue tap options (Jason Wang)
3b39a11: net: reduce the unnecessary memory allocation of multiqueue (Jason
Wang)
ec9f828: qemu-char.c: fix waiting for telnet connection message (Igor Mitsyanko)
332e934: tap: forbid creating multiqueue tap when hub is used (Jason Wang)
e6b795f: block: complete all IOs before .bdrv_truncate (Peter Lieven)
51968b8: coroutine: trim down nesting level in perf_nesting test (Paolo Bonzini)
80d8b5d: target-ppc: Fix "G2leGP3" PVR (Andreas Farber)
ChangeLog 1.4
http://wiki.qemu.org/ChangeLog/1.4
System emulation
----------------
Device emulation
Device issignment
- Improved support for MSI-X on some Mellanox devices.
- VFIO supports PCIe extended configuration space.
USB
- Various CPU usage and throughput improvements for USB 2.0.
- usb-tablet can be connected as an USB 2.0 device, also lowering
the CPU usage substantially.
- Improved support for pass-through of USB serial devices.
- A new device usb-bot is the same as usb-storage, but is configured
like other SCSI adapters and supports multiple LUNs.
Network
- virtio-net supports multiqueue operation.
Other
- Added support for IndustryPack emulation. The TEWS TPCI200 device
emulation (device "tpci200") hosts IndustryPack modules, and the
GE IP-Octal 232 emulation (device "ipoctal232") implements eight
RS-232 serial ports.
ARM
- Various minor bugfixes; no new features in this release.
MIPS
- Improved support for DSP instructions.
PowerPC
- pSeries: NVRAM support for improved guest installation experience
- G3/G4: Allow dcbzl (for Mac OS X guests)
- e500: Linux guests don't use use SWTLB anymore, freeing memory for
real applications
- e500: MSI support
- e500: Allow for up to 31 PCI devices with -M ppce500
- e500: Support idle hcall when running KVM on e500mc or above
- e500: Emulate the EPR facility (e500mc and above)
- PReP: Emulate a full PC87312 Super I/O chipset. This adds a parallel
port. Changing the chipset configuration register at runtime is
not yet supported.
S390
- New virtio-ccw machine and transport support
- Add -cpu ? support
- Improved support for S390 emulation.
x86
- Generation of APIC IDs for NUMA configuration is now compatible with
the Intel(R) 64 Architecture Processor Topology Enumeration
- Many fixes to the Q35 chipset emulation, including experimental AHCI
migration support and support for device assignment.
- Resetting the machine with a write to port 0xCF9 now works.
- The xlevel argument for -cpu option currently silently fix-ups the
user-provided value if it's less than 0x80000000. This will be
removed in future QEMU versions; users are expected to provide valid
xlevel value or QEMU will fail to start.
KVM
- New devices isa-debug-exit and pc-testdev can be used to run
kvm-unit-tests.
Xen
- Persistent grants support implemented in xen_disk, giving substantial
performance improvements.
- xen_disk supports BLKIF_OP_FLUSH_DISKCACHE, making the device safer
against power losses.
- xen_console supports multiple secondary PV consoles.
QMP
- New commands chardev-add and chardev-del add support for hotplugging
character devices.
- New ringbuf-read/ringbuf-write to read and write to memory chardevs
- Various improvements in error messages
Block devices
- Discard operations are now supported on block devices and on
filesystems other than XFS. They are also fully asynchronous now.
- Block device mirroring (also known as storage migration) performance
was greatly improved.
- New experimental threaded backend for virtio-block-pci. This new
backend achieves several times the IOPS of the existing virtio-blk
implementation; for now it can only be used for raw image files and
disables features such as live snapshots and storage migration.
Live Migration
- Moved migration from a timer to a thread, improving latency in
other parts of QEMU and throughput of migration itself
- Many machine models are now correctly marked as not migratable.
Spice
- A new spiceport character device can be used to support arbitrary
communication between the SPICE server on the host and the client.
VNC
- Added support for the Websocket protocol.
User-mode emulation
-------------------
- Fix ppc guest signal handling
- Fix MIPS target
Guest agent
-----------
- qemu-ga supports hooks that are executed when the guest receives
the guest-fsfreeze-freeze and guest-fsfreeze-thaw commands
Host support
------------
- Native asynchronous I/O for Win32 (introduced in 1.3) now actually works.
a) refer 'perl' in their Makefile, or
b) have a directory name of p5-*, or
c) have any dependency on any p5-* package
Like last time, where this caused no complaints.
Changelog:
QMP
The sendkey monitor command is now available via QMP.
All targets
QEMU can now use the Linux VFIO driver to assign PCI devices to a virtual machine.
The bus master configuration bit for PCI devices is now emulated. PCI devices cannot anymore perform DMA without setting the bit before. This may break firmware that wasn't tested on real hardware.
MIPS
Loongson Multimedia Instructions are now implemented.
MIPS32/64 ASE DSP Instructions are now implemented.
x86
The TSC frequency can be larger than 2.147 GHz.
Configuration files do not support anymore the cpudef section.
TCG (emulation) supports the SMEP (Supervisor Mode Execution Prevention) and SMAP (Supervisor Mode Access Prevention) features of newer x86 processors.
CPUID/models?
The "cpudef" config file section is now deprecated and will be removed in v1.4.
New CPU models: "Haswell" (new features: fma, pcid, movbe, fsgsbase, bmi1, hle, avx2, smep, bmi2, erms, invpcid, rtm) and "Opteron_G5" (new features: tbm, f16c, fma)
Added Intel Q35 chipset as a new machine type, '--machine q35'. Adds PCIe support. Requires an updated SeaBIOS (bios.bin), and '-acpitable file=/seabios-path/q35-acpi-dsdt.aml' to run.
Xtensa
Single precision floating point instructions are now implemented.
Device emulation
Emulation of the MC146818 real-time clock (used on PC and several other boards) does not wake up QEMU anymore every second to update the clock.
USB3 has been vastly improved, including support for USB mass storage devices and MSI/MSI-X support for the XHCI controller.
USB redirection now supports live migration.
Several bugs in the AHCI controller were fixed to support recent Windows versions.
ivshmem now has a "use64" property which will make the ivshmem driver register a 64-bit memory BAR.
New paravirtualized hardware random number generator device, VirtIORNG.
Network devices
Some problems were fixed leading to bad receive performance of E1000 and Xen network cards.
Block devices
qemu-img now can output information in JSON format using "qemu-img info --output=json".
Glusterfs volumes can be accessed with "gluster://" URIs for "-drive" and similar options. Optionally the transport can also be specified, as in "gluster+tcp://" (other supported transports are "unix" and "rdma").
Options on the QMP streaming command direct the job to pause on encountering errors, or to ignore them altogether.
A new block job is supported: live block commit (also known as "snapshot deletion") moves data from an image to another in the backing file chain. With the current implementation of QEMU 1.3, the "source" image may not be the active one.
A new block job is supported: live disk mirroring (also known as "storage migration") moves data from an image to another. A new command "block-job-complete" is used to switch the VM to use the destination image exclusively.
Block jobs can now be paused and resumed from the monitor.
NBD block devices can now be specified using URI syntax. "nbd://" defaults to TCP transport, while "nbd+tcp://" and "nbd+unix://" can be used (similar to Gluster) to specify it. URI syntax simplifies access to named exports; the export name is simply the "path" component of the URI.
NBD connections to Unix sockets support relative paths.
QEMU embeds an NBD server, accessible via the monitor. The NBD server allows live access to the image seen by the VM. Note that the embedded server uses "named exports", which QEMU can access using the "nbd://host:port/name" syntax.
Windows hosts support asynchronous disk I/O.
Live Migration, Save/Restore
The "stop" and "cont" commands have new semantics on the destination machine during migration. Previously, the outcome depended on whether the commands were issued before or after the source connected to the destination QEMU: in particular, "cont" would fail if issued before connection, and "undo" the effect of the -S command-line option if issued after. Starting from this version, the effect of "stop" and "cont" will always take place at the end of migration (overriding the presence or absence of the -S option) and "cont" will never fail. This change should be transparent, since the old behavior was usually subject to a race condition.
The monitor now remains responsive during incoming migration. The new NBD server is also available during incoming migration.
Spice
QEMU will only send changed screen content to the Spice client when running in legacy VGA mode.
Seamless migration support.
Composite QXL commands (for linux guests).
Multiple monitors on a single pci device.
Arbitrary resolution support.
Device based monitor configuration notification (for future drivers).
various bug fixes and assertion removals in favor of a guest_bug mode.
require spice-server >= 0.12.0
KVM
QEMU now supports "old-style" PCI device assignment, which was the last missing feature from the qemu-kvm fork. Despite some remaining minor differences between qemu-kvm and QEMU, it is possible to switch from qemu-kvm to QEMU as soon as your guests can be rebooted. Live migration from qemu-kvm 1.2 to QEMU 1.3 is not supported, but can be enabled easily by downstream distributions who want to switch their packages from qemu-kvm to QEMU.
Xen
QEMU can now be used to live-migrate Xen domains.
SLIRP
SLIRP's TFTP server has improved performance, can transmit files bigger than 32 MB, and supports the block size option.
Guest agent
The guest agent will now store the state file in /var/run by default.
Host support
SPARCv7 and v8 support was removed.
Build dependencies
QEMU can now be built with Clang.
QEMU now uses pixman. QEMU configure will detect and use a system pixman if the development headers are ailable (they should be available for most recent Linux distros). As a fallback, we provide an internal copy of the pixman sources which will be used if there is no set of system pixman libraries. Compiling these will require autoconf.
Compiling QEMU ver 0.12 or better.
Changes since version 1.1.1:
System emulation
All targets
* ... QMP error changes go here ...
* File descriptors can be passed to qemu using the new
add-fd/remove-fd QMP commands. It is intended that they can
be used in any place where QEMU would expect a file name.
This is ensured for disk images, support in other parts of
QEMU may still be inconsistent.
ARM
* LPAE (large physical address extensions) are now supported
for the Cortex-A15 CPU; you can now run a vexpress-a15 model
with more than 4GB of RAM
* The new monitor command "dump-guest-memory" creates an ELF
dump of the guest memory.
* New board model: i.MX31
PowerPC
* The pSeries target correctly creates segment size device
tree nodes (fixes odd bugs with HV vs PR KVM)
* The pSeries target implements an IOMMU.
* ... pSeries VGA, USB, etc.? ...
* The E500 target generates its device tree dynamically
* New mpc8544ds -machine option: dumpdtb. This allows to dump
the dynamically generated device tree to a file.
* Emulation for e5500 cores
* PC87312 Super I/O chipset emulation for PReP, adding
parallel port to prep machine
x86
* Support for PCI passthrough is available for Xen
fully-virtualized domains.
* The new monitor command "dump-guest-memory" creates an ELF
dump of the guest memory.
* When using KVM, the in-kernel APIC supports MSI.
* Also when using KVM, new PV EOI feature improves performance
when both host and guest run linux 3.6-rc1 and up. To
enable, add +kvm_pv_eoi to -cpu option, e.g.
-cpu kvm64,+kvm_pv_eoi
* The "cpudef" config file section is being deprecated and may
be removed in v1.3.
Device emulation
* VGA and QXL cards (obtained with -vga std and -vga qxl) have
16 MB of VRAM rather than 8 MB.
* Three new SCSI host bus adapter devices are available:
am53c974 and dc390 emulate respectively an AMD PCI PCscsi
and a Tekram DC-390 device, both of which are supported on
older operating systems including MS DOS 6.2, MS Windows 3.11,
98 SE, NT 3.1 and NT 4.0. megasas emulated an LSI SAS1078 RAID
controller. The next version of SeaBIOS will support booting
from am53c974 and dc390 disks.
* An USB-attached SCSI controller is now available.
Audio devices
* The PC speaker audio card is now available by default.
Network devices
* The guestfwd argument to slirp now supports running an
arbitrary command on every TCP connection (as in inetd).
This is invoked by specifying a target that starts with "cmd:".
Block devices
* Emulated IDE and SCSI as well as virtio-blk devices can now
switch the cache mode between writethrough and writeback.
virtio-blk automatically switches to writethrough if the
guest driver doesn't support flushes.
* The default cache mode for images is now writeback.
* Emulated SCSI devices can be given a custom vendor name,
product name and WWN.
* Improved support for passthrough of SCSI tapes and media changers.
* libiscsi can be used together with scsi-generic to pass
iSCSI tapes and media changers to the guest.
* When raw files are streamed, parts of the files that are
holes in the underlying filesystem are treated as
unallocated (as long as the OS supports either the FIEMAP
ioctl or the SEEK_HOLE/SEEK_DATA modes)
* CD-ROM drives can now be used with AHCI
qcow2
* qcow2 images support a new option, lazy_refcounts. If on,
the speed of cache=writethrough mode will be improved, at
the cost of requiring an fsck-like pass (and thus QEMU 1.2)
to use the image again after a power loss.
* qemu-img check can now repair qcow2 and QED images with the
new -r option.
VMDK
* Support for images in the streamOptimized subformat has been
fixed. This is a VMDK subformat commonly used with OVF appliances.
rbd
* rbd no longer ignores the cache setting
Live Migration, Save/Restore
* Migration works much better with guests with large memory.
* USB mass storage and passthrough devices support live migration.
VNC
* The threaded VNC server is now enabled by default.
Guest agent
* A new command "fstrim" was added to the guest agent.
New targets
* OpenRISC is now supported for both user-mode and system emulation.
Changelog:
# System emulation
## All targets
* qdev properties of type hex8 and hex32 used to accept hexadecimal values not prefixed with "0x"; the prefix is mandatory starting with this version. These properties are: iobase, membase, io_base for all devices that support the properties; vram_size for sysbus-g364 and SUNW,tcx; version for sb16 and iommu; ctl_iobase and data_iobase for fw_cfg; readback for debugcon; elcr_addr and elcr_mask for i8259.
* PCI addresses can still be addressed with a pair of hexadecimal device and function without a "0x" prefix.
* -kernel, -initrd and -append are now aliases for suboptions of -machine (for example -machine kernel=foo), and as such they are also available with -readconfig.
* PCI-to-PCI bridges are supported [...]
* PCI emulation includes a standard hot-plug controller [...]
* The coroutine backend can now be configured using configure --with-coroutine=.... A new coroutine backend sigaltstack is available for platforms that don't support the default ucontext backend.
* Last but not least: the SDL user interface now uses the new QEMU icon.
## ARM
* The syborg machine type has been removed since the Symbian Virtual Platform is no longer relevant with the disbanding of Symbian.
* A device tree can be passed to the kernel using -dtb option (or alternatively -machine dtb=...).
* New 'nuri' and 'smdkc210' models of Samsung Exynos4210 based devboards.
* New 'highbank' model of the Calxeda Highbank.
* New 'vexpress-a15' model of the Versatile Express Cortex-A15.
## PowerPC
* The Bamboo machine now works with TCG, before only KVM was able to execute 440 code.
* Pseries handles PCI, allowing for virtio devices with -M pseries.
* Pseries works with PR KVM allowing for -M pseries -enable-kvm to work on G5s.
* We can now emulate e500mc cores, but no e500mc based board is emulated yet. You need to use -M mpc8544ds and a special guest kernel.
* Timers on ppc405 now work and don't segfault QEMU.
## S/390
* Added support to -kernel to allow booting of ELF binaries.
* Fixed -kernel to allow booting of newer guest kernels.
* Devices can now be hotplug add'ed (remove is not there yet).
* Rebooting a virtual machine now works.
## SPARC
* Added interrupt controller and support of vector interrupts.
* Fixed handling 32 bit instructions on a sparc64 CPU.
* Fixed block load instructions regression happened in 1.0 release.
* Fixed BCD mask in m48t59 emulation, so that Solaris 2.5.1 doesn't hang on sun4m emulation when day of month >21.
* Fixed initrd loading in qemu-system-sparc64.
## x86
* NMIs are correctly injected through the LAPIC (rather than sent directly to the guest CPU) and respect the LINT1 mask, thus fixing kdump.
* The -rtc-td-hack option is now available as a qdev property (-global mc146818rtc.lost_tick_policy=slew) and as such can be specified in a -readconfig configuration file.
* When the system is suspended to RAM, QEMU will now stop executing the guest until a wakeup event occurs. Implemented wakeup events include key presses, mouse button presses, RTC alarm, ACPI timer expiration, serial console input (off by default; enable with -global isa-serial.wakeup=1), and the system_wakeup monitor command.
* KVM can optionally use kernel-based emulation of the local APIC, IOAPIC, i8259 PIC and i8254 PIT. This is supported with the -machine ...,kernel_irqchip=on command-line option. MSI is not supported yet when using the kernel_irqchip option.
* Emulation of a PC System Flash device. The feature is enabled by adding a pflash drive. This feature is not supported when KVM is enabled. See Features/PC System Flash for more information.
* KVM guests support Hyper-V enlightenments. These are enabled by the -cpu features hv_spinlocks, hv_relaxed and hv_vapic.
## Device emulation
* The virtio-scsi device is now supported by QEMU. The guest driver will be supported in Linux starting at version 3.4.
* QEMU now includes experimental support for USB 3.0 (xHCI).
* Various improvement on the floppy emulation, most notably media change has been fixed
## Audio devices
* Audio devices can now use volume control capabilities exposed by the PulseAudio and Spice backends. (Note: all audio devices do not expose their volume control unless --enable-mixemu is turned on).
## Block devices
* QEMU's NBD client implementation and the qemu-nbd server both fully support asynchronous I/O.
* The rbd block driver supports the discard operation now
* The vpc block driver supports the Fixed Disk subformat of VHD images now
* The new QMP command transaction can be used to perform a set of multiple snapshots atomically, rolling back to the original images if there is a problem along the way. See Features/SnapshotsMultipleDevices for more information.
* The new monitor command block_stream lets guest copy data from the backing file to the current image while the guest is running. This lets users enables quick provisioning of new virtual machines using shared remote storage, and lets the guest transition incrementally to fast local storage. An alternative to streaming is the copy-on-read option of the -drive command-line option, which only transfers data when the guest needs it.
* An experimental extension of the qcow2 file format has been introduced. With the implementation as of QEMU 1.1, the most important addition is zero clusters, which allows image streaming and copy-on-read to leave images sparse if the backing file they are copying from is sparse. In order to enable the extension, use qemu-img create -f qcow2 -o compat=1.1 <filename> <size> for creating the image. Note that older versions of QEMU won't be able to read such images.
* I/O throttling is experimentally supported using the new -drive options bps/bps_rd/bps_wr/iops/iops_rd/iops_wr. It is expected to work with virtio-blk and IDE harddisks, but may lead to hangs when used with CD-ROM or floppy emulation or other devices.
* qemu-io supports new options to enable tracing and to choose a cache modes
## Network devices
* QEMU supports a new type of network device, bridge (used with -net bridge or -netdev bridge). The new type is similar to tap, but uses a helper program instead of a script to attach the device to a bridge. The helper program can then be installed as setuid. The helper program supports a simple ACL and configuration mechanism, see the commit message and feature page for documentation.
## Live Migration, Save/Restore
* Live migration (or save/restore) from QEMU releases prior to 0.13 to QEMU 1.1 is not supported.
* Live migration supports IPv6. IPv6 addresses can be expressed as tcp:host:port. Brackets around a numeric host address are required if a port is also specified, otherwise they can be omitted.
# Guest agent
* qemu-ga has been ported to Windows.
* Interfaces added for suspending guests to disk/ram, and retrieving information about network interfaces
* Interfaces for filesystem freeze have been hardened, and no longer depend on guest agent runtime state to determine whether a system is currently frozen.
* An easier to use reset mechanism has been added: guest-sync-delimited.
# Host support
* ARM hosts are now supported again (they were broken in 1.0).
* Sockets and SLIRP on Windows hosts was broken in 0.14 and works again.
* 64-bit Windows hosts are now supported.
# User-mode emulation
* User-mode emulation can provide some information from the /proc filesystem.
* On 64-bit hosts user-mode emulation now defaults to reserving 0xf7000000 bytes of address space for the guest. This significantly reduces the likelihood of QEMU having to fail a guest mmap() request when there is still memory available. This reservation can be overridden with the -R command line option.
# Testing
* A make check target has been implemented and runs some quick sanity tests
* qemu-iotests, which was previously hosted in an external git repository, has been merged into the QEMU source tree
# Build dependencies
* Building QEMU requires glib 2.12 on POSIX systems, and glib 2.20 on Win32 systems.
* based on wip/qemu
Changelog:
1.1.0
System emulation
All targets
qdev properties of type hex8 and hex32 used to accept hexadecimal values not prefixed with "0x"; the prefix is mandatory starting with this version. These properties are: iobase, membase, io_base for all devices that support the properties; vram_size for sysbus-g364 and SUNW,tcx; version for sb16 and iommu; ctl_iobase and data_iobase for fw_cfg; readback for debugcon; elcr_addr and elcr_mask for i8259.
PCI addresses can still be addressed with a pair of hexadecimal device and function without a "0x" prefix.
-kernel, -initrd and -append are now aliases for suboptions of -machine (for example -machine kernel=foo), and as such they are also available with -readconfig.
PCI-to-PCI bridges are supported [...]
PCI emulation includes a standard hot-plug controller [...]
The coroutine backend can now be configured using configure --with-coroutine=.... A new coroutine backend sigaltstack is available for platforms that don't support the default ucontext backend.
Last but not least: the SDL user interface now uses the new QEMU icon.
ARM
The syborg machine type has been removed since the Symbian Virtual Platform is no longer relevant with the disbanding of Symbian.
A device tree can be passed to the kernel using -dtb option (or alternatively -machine dtb=...).
New 'nuri' and 'smdkc210' models of Samsung Exynos4210 based devboards.
New 'highbank' model of the Calxeda Highbank.
New 'vexpress-a15' model of the Versatile Express Cortex-A15.
PowerPC
The Bamboo machine now works with TCG, before only KVM was able to execute 440 code.
Pseries handles PCI, allowing for virtio devices with -M pseries.
Pseries works with PR KVM allowing for -M pseries -enable-kvm to work on G5s.
We can now emulate e500mc cores, but no e500mc based board is emulated yet. You need to use -M mpc8544ds and a special guest kernel.
Timers on ppc405 now work and don't segfault QEMU.
S/390
Added support to -kernel to allow booting of ELF binaries.
Fixed -kernel to allow booting of newer guest kernels.
Devices can now be hotplug add'ed (remove is not there yet).
Rebooting a virtual machine now works.
SPARC
Added interrupt controller and support of vector interrupts.
Fixed handling 32 bit instructions on a sparc64 CPU.
Fixed block load instructions regression happened in 1.0 release.
Fixed BCD mask in m48t59 emulation, so that Solaris 2.5.1 doesn't hang on sun4m emulation when day of month >21.
Fixed initrd loading in qemu-system-sparc64.
x86
NMIs are correctly injected through the LAPIC (rather than sent directly to the guest CPU) and respect the LINT1 mask, thus fixing kdump.
The -rtc-td-hack option is now available as a qdev property (-global mc146818rtc.lost_tick_policy=slew) and as such can be specified in a -readconfig configuration file.
When the system is suspended to RAM, QEMU will now stop executing the guest until a wakeup event occurs. Implemented wakeup events include key presses, mouse button presses, RTC alarm, ACPI timer expiration, serial console input (off by default; enable with -global isa-serial.wakeup=1), and the system_wakeup monitor command.
KVM can optionally use kernel-based emulation of the local APIC, IOAPIC, i8259 PIC and i8254 PIT. This is supported with the -machine ...,kernel_irqchip=on command-line option. MSI is not supported yet when using the kernel_irqchip option.
Emulation of a PC System Flash device. The feature is enabled by adding a pflash drive. This feature is not supported when KVM is enabled. See Features/PC System Flash for more information.
KVM guests support Hyper-V enlightenments. These are enabled by the -cpu features hv_spinlocks, hv_relaxed and hv_vapic.
Device emulation
The virtio-scsi device is now supported by QEMU. The guest driver will be supported in Linux starting at version 3.4.
QEMU now includes experimental support for USB 3.0 (xHCI).
Various improvement on the floppy emulation, most notably media change has been fixed
Audio devices
Audio devices can now use volume control capabilities exposed by the PulseAudio and Spice backends. (Note: all audio devices do not expose their volume control unless --enable-mixemu is turned on).
Block devices
QEMU's NBD client implementation and the qemu-nbd server both fully support asynchronous I/O.
The rbd block driver supports the discard operation now
The vpc block driver supports the Fixed Disk subformat of VHD images now
The new QMP command transaction can be used to perform a set of multiple snapshots atomically, rolling back to the original images if there is a problem along the way. See Features/SnapshotsMultipleDevices for more information.
The new monitor command block_stream lets guest copy data from the backing file to the current image while the guest is running. This lets users enables quick provisioning of new virtual machines using shared remote storage, and lets the guest transition incrementally to fast local storage. An alternative to streaming is the copy-on-read option of the -drive command-line option, which only transfers data when the guest needs it.
An experimental extension of the qcow2 file format has been introduced. With the implementation as of QEMU 1.1, the most important addition is zero clusters, which allows image streaming and copy-on-read to leave images sparse if the backing file they are copying from is sparse. In order to enable the extension, use qemu-img create -f qcow2 -o compat=1.1 <filename> <size> for creating the image. Note that older versions of QEMU won't be able to read such images.
I/O throttling is experimentally supported using the new -drive options bps/bps_rd/bps_wr/iops/iops_rd/iops_wr. It is expected to work with virtio-blk and IDE harddisks, but may lead to hangs when used with CD-ROM or floppy emulation or other devices.
qemu-io supports new options to enable tracing and to choose a cache modes
Network devices
QEMU supports a new type of network device, bridge (used with -net bridge or -netdev bridge). The new type is similar to tap, but uses a helper program instead of a script to attach the device to a bridge. The helper program can then be installed as setuid. The helper program supports a simple ACL and configuration mechanism, see the commit message and feature page for documentation.
Live Migration, Save/Restore
Live migration (or save/restore) from QEMU releases prior to 0.13 to QEMU 1.1 is not supported.
Live migration supports IPv6. IPv6 addresses can be expressed as tcp:host:port. Brackets around a numeric host address are required if a port is also specified, otherwise they can be omitted.
Guest agent
qemu-ga has been ported to Windows.
Interfaces added for suspending guests to disk/ram, and retrieving information about network interfaces
Interfaces for filesystem freeze have been hardened, and no longer depend on guest agent runtime state to determine whether a system is currently frozen.
An easier to use reset mechanism has been added: guest-sync-delimited.
Host support
ARM hosts are now supported again (they were broken in 1.0).
Sockets and SLIRP on Windows hosts was broken in 0.14 and works again.
64-bit Windows hosts are now supported.
User-mode emulation
User-mode emulation can provide some information from the /proc filesystem.
On 64-bit hosts user-mode emulation now defaults to reserving 0xf7000000 bytes of address space for the guest. This significantly reduces the likelihood of QEMU having to fail a guest mmap() request when there is still memory available. This reservation can be overridden with the -R command line option.
Testing
A make check target has been implemented and runs some quick sanity tests
qemu-iotests, which was previously hosted in an external git repository, has been merged into the QEMU source tree
Build dependencies
Building QEMU requires glib 2.12 on POSIX systems, and glib 2.20 on Win32 systems.
Changelog:
1.0.1
* Version 1.0.1
* Merge branch 's390-1.0' of git://repo.or.cz/qemu/agraf
* Merge branch 'ppc-1.0' of git://repo.or.cz/qemu/agraf
* e1000: bounds packet size against buffer size
* s390: fix cpu hotplug / cpu activity on interrupts
* s390x: add TR function for EXECUTE
* pseries: Don't try to munmap() a malloc()ed TCE table
* pseries: Populate "/chosen/linux,stdout-path" in the FDT
* pseries: Add a routine to find a stable "default" vty and use it
* pseries: Emit device tree nodes in reg order
* kvm-ppc: halt secondary cpus when guest reset
* pseries: Fix array overrun bug in PCI code
* console: Fix segfault on screendump without VGA adapter
* Merge branch 'master' of ssh://git.qemu.org/pub/git/qemu-stable-1.0
* rbd: always set out parameter in qemu_rbd_snap_list
* Documentation: Add qemu-img -t parameter in man page
* qemu-img rebase: Fix for undersized backing files
* coroutine: switch per-thread free pool to a global pool
* qiov: prevent double free or use-after-free
* PPC: Fix linker scripts on ppc hosts
* target-sh4: ignore ocbp and ocbwb instructions
* usb-ohci: td.cbp incorrectly updated near page end
* usb-host: properly release port on unplug & exit
* usb-storage: cancel I/O on reset
* Fix parse of usb device description with multiple configurations
* pc: fix event_idx compatibility for virtio devices
* pc: add pc-0.15
* cris: Handle conditional stores on CRISv10
* configure: Enable build by default PIE / read-only relocation sections on OpenBSD amd64/i386.
* target-i386: fix cmpxchg instruction emulation
* hw/9pfs: Use the correct signed type for different variables
* hw/9pfs: replace iovec manipulation with QEMUIOVector
* hw/9pfs: Use the correct file descriptor in Fsdriver Callback
* hw/9pfs: Add qdev.reset callback for virtio-9p-pci device
* hw/9pfs: Reset server state during TVERSION
* hw/9pfs: use migration blockers to prevent live migration when virtfs export path is mounted
* hw/9pfs: Improve portability to older systems
* exec.c: Fix subpage memory access to RAM MemoryRegion
* malta: Fix regression (i8259 interrupts did not work)
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.
QEMU now uses a separate thread for VCPU execution. This merges the biggest difference between the qemu-kvm tree and upstream QEMU.
A new memory dispatch API has been added internally. A new monitor command "info mtree" can show the hierarchy of memory regions in the guest.
QEMU now has a build dependency on glib and makes extensive use of glib.
QEMU now can run on more hosts. Hosts without a native code generator can use the TCG interpreter (TCI). See Features/TCI for more information.
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.
VDI
Now supports discarded blocks in dynamically-sized images.
User-mode networking (SLIRP)
SLIRP can process ARP replies and gratuitous ARP requests from the guest.
ARM
QEMU now supports the new Cortex-A15 instructions in linux-user mode (via "-cpu any"): VFPv4 fused multiply-accumulate (VFMA, VFMS, VFNMA, VFNMS) and also integer division (UDIV, SDIV).
The vexpress-a9, versatileab, versatilepb and realview-* boards now have audio support.
QEMU is known not to work on ARM hosts in this release. (ARM target emulation is fine.)
pSeries
sPAPR VIO devices can now be created with -device.
Xtensa
QEMU now supports DC232b and FSF xtensa CPU cores.
QEMU now supports sim (similar to Tensilica ISS) and LX60/LX110/LX200 machines.
Migration
QEMU now supports live migration using image files like QCOW2 on shared storage
disable the Nagle algorithm in the host-side connection. Either
the VM is already doing Nagle, in which case there is no point
in doing it twice, or it has chosen to disable it, in which case
we should respect that choice. This change speeds up GDB remote
debugging over TCP over user mode networking by multiple orders
of magnitude.
Changelog:
qed: fix use-after-free during l2 cache commit
sdl: Fix termination in -no-shutdown mode
Fix termination by signal with -no-shutdown
Add support for finding libpng via pkg-config.
Check for presence of compiler -pthread flag.
Allow overriding the location of Samba's smbd.
Fix linker scripts
Fix install(1) usage to be compatible with OpenBSD's install(1).
Fix qjson test of solidus encoding
configure: Copy test data to build directory
monitor: fix build breakage for !CONFIG_VNC
monitor: fix build breakage with --disable-vnc
Fix forcing multicast msgs to loopback on OpenBSD.
user: Restore debug usage message for '-d ?' in user mode emulation
* patch-aa is for tap detection bug.
* patch-bb is for build on NetBSD 4.
The patch-aa requires bump of PKGREVISION.
Pointed out by Sergey Svishchev in private e-mail.
