Commit Graph

174 Commits

Author SHA1 Message Date
Anthony Liguori 82ac96a72b Merge remote-tracking branch 'sweil/for-1.1' into staging
* sweil/for-1.1:
  qemu-doc: Use QEMU instead of qemu for product name
  qemu-doc: Fix executable name in examples
  qemu-doc: Add missing parameter in description of -D option
  configure: Use QEMU instead of Qemu
  fix some common typos
  qemu-timer: Fix wrong error message
2012-05-14 10:06:50 -05:00
Stefan Weil b65ee4fa29 qemu-doc: Use QEMU instead of qemu for product name
When 'qemu' was used as a product name or as a generic process name,
it is now replaced by the official upper case 'QEMU'.

v2:
Added missing period (hint from Andreas Färber).

Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
2012-05-14 07:27:24 +02:00
Stefan Weil 3804da9dbe qemu-doc: Fix executable name in examples
The executable name qemu was replaced some time ago by qemu-system-i386.
Fix all examples accordingly.

Some examples will only work with qemu-system-i386 or qemu-system-x86_64
for obvious reasons ("dos.img").

To keep things simple, I did not vary the executable name.
Place holders like qemu-system-TARGET were also only used once
in the enhanced description for QEMU launches using Wine.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
2012-05-14 07:27:24 +02:00
Stefan Weil 8bd383b41a qemu-doc: Add missing parameter in description of -D option
'logfile' is a place holder for a non optional parameter.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
2012-05-14 07:27:24 +02:00
Eduardo Habkost f29a56147b implement -no-user-config command-line option (v3)
Changes v2 -> v3:
 - Rebase against latest qemu.git

Changes v1 -> v2:
 - Change 'userconfig' field/variables to bool instead of int
 - Coding style change

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-05-10 12:37:57 -05:00
Stefan Weil 071c939458 Replace Qemu by QEMU in user visible documentation
The official spelling is QEMU.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-07 13:58:06 +00:00
Blue Swirl b7c8e15a14 Merge branch 'arm-devs.for-upstream' of git://git.linaro.org/people/pmaydell/qemu-arm
* 'arm-devs.for-upstream' of git://git.linaro.org/people/pmaydell/qemu-arm:
  pl031: switch clock base to rtc_clock
  pl031: rearm alarm timer upon load
  arm: switch real-time clocks to rtc_clock
  omap: switch omap_lpg to vm_clock
  rtc: add -rtc clock=rt
2012-03-31 12:10:07 +00:00
Anthony Liguori c7f0f3b1c8 qtest: add test framework
The idea behind qtest is pretty simple.  Instead of executing a CPU via TCG or
KVM, rely on an external process to send events to the device model that the CPU
would normally generate.

qtest presents itself as an accelerator.  In addition, a new option is added to
establish a qtest server (-qtest) that takes a character device.  This is what
allows the external process to send CPU events to the device model.

qtest uses a simple line based protocol to send the events.  Documentation of
that protocol is in qtest.c.

I considered reusing the monitor for this job.  Adding interrupts would be a bit
difficult.  In addition, logging would also be difficult.

qtest has extensive logging support.  All protocol commands are logged with
time stamps using a new command line option (-qtest-log).  Logging is important
since ultimately, this is a feature for debugging.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-03-30 08:14:11 -05:00
Paolo Bonzini 788081417a rtc: add -rtc clock=rt
This will let people use backwards-compatible semantics for devices that
will be affected by the following patches.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2012-03-30 10:31:21 +00:00
Miroslav Rezanina 3017b72cd0 Man page: Add -global description
There's only TODO information in qemu man page for -global option. This is a basic description of this option with simple example.

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>

v4:
 - break long line

v3:
 - add use case description
 - use prop instead of property

v2:
 - Use better value in example
Patch:
--
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-03-26 14:21:14 -05:00
Peter A. G. Crosthwaite 379b5c7c3c qemu-options.hx: allow -dtb argument for all archs
Signed-off-by: Peter A. G. Crosthwaite <peter.crosthwaite@petalogix.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2012-03-05 23:00:15 +01:00
Grant Likely 412beee6a0 arm: add device tree support
If compiled with CONFIG_FDT, allow user to specify a device tree file using
the -dtb argument.  If the machine supports it then the dtb will be loaded
into memory and passed to the kernel on boot.

Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
[Peter Maydell: Use machine opt rather than global to pass dtb filename]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2012-03-02 11:56:38 +00:00
Anthony Liguori 6c263e26a5 Merge remote-tracking branch 'qemu-kvm/uq/master' into staging
* qemu-kvm/uq/master:
  apic: Fix legacy vmstate loading for KVM
  kvm: Implement kvm_irqchip_in_kernel like kvm_enabled
  kvm: Allow to set shadow MMU size
2012-02-15 18:41:28 -06:00
Anthony Liguori cf5cfe0471 Merge remote-tracking branch 'kraxel/vnc.2' into staging
* kraxel/vnc.2:
  vnc: lift modifier keys on client disconnect.
  vnc: implement shared flag handling.
  vnc: fix ctrl key in vnc terminal emulation
  Fix vnc memory corruption with width = 1400
2012-02-15 18:40:53 -06:00
Gerd Hoffmann 8cf364898c vnc: implement shared flag handling.
VNC clients send a shared flag in the client init message.  Up to now
qemu completely ignores this.  This patch implements shared flag
handling.  It comes with three policies:  By default qemu behaves as one
would expect:  Asking for a exclusive access grants exclusive access to
the client connecting.  There is also a desktop sharing mode which
disallows exclusive connects (so one forgetting -shared wouldn't drop
everybody else) and a compatibility mode which mimics the traditional
(but non-conforming) qemu behavior.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-02-10 09:58:33 +01:00
Ronnie Sahlberg f9dadc9855 iSCSI: add configuration variables for iSCSI
This patch adds configuration variables for iSCSI to set
initiator-name to use when logging in to the target,
which type of header-digest to negotiate with the target
and username and password for CHAP authentication.

This allows specifying a initiator-name either from the command line
-iscsi initiator-name=iqn.2004-01.com.example:test
or from a configuration file included with -readconfig
    [iscsi]
      initiator-name = iqn.2004-01.com.example:test
      header-digest = CRC32C|CRC32C-NONE|NONE-CRC32C|NONE
      user = CHAP username
      password = CHAP password

If you use several different targets, you can also configure this on a per
target basis by using a group name:
    [iscsi "iqn.target.name"]
    ...

The configuration file can be read using -readconfig.
Example :
qemu-system-i386 -drive file=iscsi://127.0.0.1/iqn.ronnie.test/1
 -readconfig iscsi.conf

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-02-09 16:17:50 +01:00
Jan Kiszka 39d6960aab kvm: Allow to set shadow MMU size
Introduce the KVM-specific machine option kvm_shadow_mem. It allows to
set a custom shadow MMU size for the virtual machine. This is useful for
stress testing e.g.

Only x86 supports this for now, but it is in principle a generic
concept for all targets with shadow MMUs.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-02-08 15:57:50 -02:00
Anthony Liguori dc717bfd05 Merge remote-tracking branch 'aneesh/for-upstream' into staging
* aneesh/for-upstream:
  hw/9pfs: Remove O_NOATIME flag from 9pfs open() calls in readonly mode
  hw/9pfs: Update MAINTAINERS file
  fsdev: Fix parameter parsing for proxy helper
  hw/9pfs: Fix crash when mounting with synthfs
  hw/9pfs: Preserve S_ISGID
  hw/9pfs: Add new security model mapped-file.
2012-02-08 07:23:55 -06:00
Corey Bryant a7c36ee492 Add support for net bridge
The most common use of -net tap is to connect a tap device to a bridge.  This
requires the use of a script and running qemu as root in order to allocate a
tap device to pass to the script.

This model is great for portability and flexibility but it's incredibly
difficult to eliminate the need to run qemu as root.  The only really viable
mechanism is to use tunctl to create a tap device, attach it to a bridge as
root, and then hand that tap device to qemu.  The problem with this mechanism
is that it requires administrator intervention whenever a user wants to create
a guest.

By essentially writing a helper that implements the most common qemu-ifup
script that can be safely given cap_net_admin, we can dramatically simplify
things for non-privileged users.  We still support existing -net tap options
as a mechanism for advanced users and backwards compatibility.

Currently, this is very Linux centric but there's really no reason why it
couldn't be extended for other Unixes.

A typical invocation would be similar to one of the following:

  qemu linux.img -net bridge -net nic,model=virtio

  qemu linux.img -net tap,helper="/usr/local/libexec/qemu-bridge-helper"
                 -net nic,model=virtio

  qemu linux.img -netdev bridge,id=hn0
                 -device virtio-net-pci,netdev=hn0,id=nic1

  qemu linux.img -netdev tap,helper="/usr/local/libexec/qemu-bridge-helper",id=hn0
                 -device virtio-net-pci,netdev=hn0,id=nic1

The default bridge that we attach to is br0.  The thinking is that a distro
could preconfigure such an interface to allow out-of-the-box bridged networking.

Alternatively, if a user wants to use a different bridge, a typical invocation
would be simliar to one of the following:

  qemu linux.img -net bridge,br=qemubr0 -net nic,model=virtio

  qemu linux.img -net tap,helper="/usr/local/libexec/qemu-bridge-helper --br=qemubr0"
                 -net nic,model=virtio

  qemu linux.img -netdev bridge,br=qemubr0,id=hn0
                 -device virtio-net-pci,netdev=hn0,id=nic1

  qemu linux.img -netdev tap,helper="/usr/local/libexec/qemu-bridge-helper --br=qemubr0",id=hn0
                 -device virtio-net-pci,netdev=hn0,id=nic1

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Richa Marwaha <rmarwah@linux.vnet.ibm.com>
Signed-off-by: Corey Bryant <coreyb@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-02-01 16:24:40 -06:00
Jan Kiszka 6a48ffaaa7 kvm: Activate in-kernel irqchip support
Make the basic in-kernel irqchip support selectable via
-machine ...,kernel_irqchip=on. Leave it off by default until it can
fully replace user space models.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
2012-01-19 12:14:42 +01:00
Aneesh Kumar K.V 2c30dd744a hw/9pfs: Add new security model mapped-file.
This enable us to do passthrough equivalent security model on NFS directory.
NFS server mostly do root squashing and don't support xattr. Hence we cannot
use 'passthrough' or 'mapped' security model

Also added "mapped-xattr" security to indicate earlier "mapped" security model
Older name is still supported.

POSIX rules regarding ctime update on chmod are not followed by this security model.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2012-01-19 12:21:11 +05:30
Benjamin 0e0e7facc7 Support for UDP unicast network backend
Signed-off-by: Benjamin MARSILI <mlspirat42@gmail.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-01-12 10:34:20 -06:00
Anthony Liguori a2e4d53ec5 Merge remote-tracking branch 'stefanha/trivial-patches' into staging
* stefanha/trivial-patches:
  qemu-nbd: drop loop which can never loop
  Make python mandatory
  net/socket.c: Fix fd leak in net_socket_listen_init() error paths
  gdbstub: Fix fd leak in gdbserver_open() error path
  configure: Fix test for supported host CPU type
  configure: CONFIG_QEMU_INTERP_PREFIX only for user mode
  scsi virtio-blk usb-msd: Clean up device init error messages
  Strip trailing '\n' from error_report()'s first argument (again)
  qemu-options.hx: fix tls-channel help text
2012-01-06 12:51:21 -06:00
Alon Levy d70d6b3109 qemu-options.hx: fix tls-channel help text
Remove the default compiled out tunnel channel, add the always available
cursor channel. Optimally the man page would depend on compiled in
options, but that's harder to do.

RHBZ: 688586

Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Alon Levy <alevy@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-01-06 15:07:00 +00:00
M. Mohan Kumar 84a87cc4cc hw/9pfs: Add support to use named socket for proxy FS
Add option to use named socket for communicating between proxy helper
and qemu proxy FS. Access to socket can be given by using command line
options -u and -g.

Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2012-01-04 21:23:55 +05:30
M. Mohan Kumar f67e3ffd34 hw/9pfs: Documentation changes related to proxy fs
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2012-01-04 21:23:53 +05:30
Michael Ellerman b1746dddfc Documentation: Move balloon option out of i386 only section
The balloon option is not i386 only, so move it into the standard
options section.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-12-19 10:27:33 -06:00
Michael Ellerman a3adb7ad3b vl.c: In qemu -h output, only print options for the arch we are running as
Only print options in the help output that are accepted by our arch.
This is less confusing for users and also for other programs that
consume the help output.

The options affected are:

 -g and -prom-env only displayed on PPC or SPARC

 -win2k-hack, -rtc-td-hack, -no-fd-bootchk, -no-acpi, -no-hpet,
 -acpitable, -smbios only displayed on i386

 -semihosting only displayed on ARM, M68K or XTENSA

 -old-param only displayed on ARM

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-12-19 10:27:33 -06:00
Stefan Weil e7d81004e4 Fix spelling in comments, documentation and messages
accidently->accidentally
annother->another
choosen->chosen
consideres->considers
decriptor->descriptor
developement->development
paramter->parameter
preceed->precede
preceeding->preceding
priviledge->privilege
propogation->propagation
substraction->subtraction
throught->through
upto->up to
usefull->useful

Fix also grammar in posix-aio-compat.c

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-12-14 11:09:44 +00:00
Stefan Hajnoczi fb0490f69f block: add -drive copy-on-read=on|off
This patch adds the -drive copy-on-read=on|off command-line option:

  copy-on-read=on|off
  copy-on-read is "on" or "off" and enables whether to copy read backing
  file sectors into the image file.  Copy-on-read avoids accessing the
  same backing file sectors repeatedly and is useful when the backing
  file is over a slow network.  By default copy-on-read is off.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-12-05 14:51:38 +01:00
Zhi Yong Wu 0563e19151 block: add the blockio limits command line support
Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-12-05 14:51:35 +01:00
Anthony Liguori 8494a397b6 Merge remote-tracking branch 'kwolf/for-anthony' into staging
Conflicts:
	block/vmdk.c
2011-10-31 11:09:00 -05:00
Aneesh Kumar K.V 9db221ae73 hw/9pfs: Add synthetic file system support using 9p
This patch create a synthetic file system with mount tag
v_synth when -virtfs_synth command line option is specified
in qemu. The synthetic file system can be mounted in guest
using 9p using the below command line

mount -t 9p -oversion=9p2000.L,trans=virtio v_synth  <mountpint>

Synthetic file system enabled different qemu subsystem to register
callbacks for read and write events from guest. The subsystem
can create directories and files in the synthetic file system as show
in ex below

    qemu_v9fs_synth_mkdir(NULL, 0777, "test2", &node);
    qemu_v9fs_synth_add_file(node, 0777, "testfile",
                             my_test_read, NULL, NULL);

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-10-31 12:34:18 +05:30
M. Mohan Kumar 2c74c2cb4b hw/9pfs: Read-only support for 9p export
A new fsdev parameter "readonly" is introduced to control accessing 9p export.
"readonly" can be used to specify the access type. By default "rw" access
is given to 9p export.

Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-10-31 12:34:17 +05:30
Ronnie Sahlberg d99902287c Documentation: Add syntax for using sheepdog devices
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-10-28 19:25:50 +02:00
Ronnie Sahlberg 08ae330e17 Documentation: Describe NBD URL syntax
This patch adds a short description of how to specify a NBD device
to QEMU.
Syntax for both TCP and Unix Domain Sockets are provided as well
as examples.

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-10-28 19:25:49 +02:00
Ronnie Sahlberg 0f5314a2c8 Documentation: Add iSCSI section
Add new section for device URL syntax for special files and describe the iSCSI
URL with examples

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-10-28 19:25:49 +02:00
Anthony Liguori 1f99b94932 Merge remote-tracking branch 'aneesh/for-upstream-6' into staging
Conflicts:
	trace-events
2011-10-20 08:42:08 -05:00
M. Mohan Kumar d9b36a6e56 hw/9pfs: Handle Security model parsing
Except local fs driver all other fs drivers (handle, synth) don't need
security model. Update fsdev parameter parsing accordingly.

Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-10-15 15:30:27 +05:30
Aneesh Kumar K.V 7c92a3d2a1 qemu-options.hx: Update virtfs command documentation
Clarify the virtfs option better
Updates from:Sripathi Kodi <sripathik@in.ibm.com>

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-10-15 15:30:26 +05:30
Stefan Hajnoczi 3a846906c9 qemu-options: avoid #if in spicevmc texi help
Preprocessor directives cannot be used in STEXI/ETEXI sections since
they are not passed through the preprocessor.  The spicevmc chardev
option help currently uses #if, which is included verbatim in the man
page output.

Fix this by simply stating that spicevmc chardevs are available only in
builds with spice support.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-10-14 14:36:03 +01:00
Aneesh Kumar K.V d3ab98e691 hw/9pfs: Add new virtfs option writeout=immediate skip host page cache
writeout=immediate implies the after pwritev we do a sync_file_range.

Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-10-12 19:11:23 +05:30
Max Filippov 1ddeaa5d42 target-xtensa: implement SIMCALL
Tensilica iss provides support for applications running in freestanding
environment through SIMCALL command. It is used by Tensilica libc to
access argc/argv, for file I/O, etc.

Note that simcalls that accept buffer addresses expect virtual addresses.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-09-10 16:57:39 +00:00
Stefan Weil c1ba4e0be1 qemu-options: Improve help texts for options which depend on configure
* Replace "available only" by the more common "only available".

* Tracing options depend on the configuration of the QEMU executable,
  so clarify the help text for both options.

Cc: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-09-09 09:43:18 +01:00
Brad e2d8830efc Allow overriding the location of Samba's smbd.
Allow overriding the location of Samba's smbd.

Pretty much every OS I look at has some means of
changing this path (patching) so lets just make
it easier for OS developers creating packages
and/or end users to override the location.

Signed-off-by: Brad Smith <brad@comstyle.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-09-03 17:45:48 +00:00
Lluís 9a82b6a590 trace: [stderr] add support for dynamically enabling/disabling events
Uses the generic interface provided in "trace/control.h" in order to provide
a programmatic interface as well as command line and monitor controls.

Signed-off-by: Fabien Chouteau <chouteau@adacore.com>
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
2011-09-01 10:34:54 +01:00
Lluís 23d15e860b trace: add "-trace events" argument to control initial state
The "-trace events" argument can be used to provide a file with a list of trace
event names that will be enabled prior to starting execution, thus providing
early tracing.

This saves the user from manually toggling event states through the monitor
interface or whichever backend-specific interface.

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
2011-09-01 10:34:54 +01:00
Lluís e4858974ec trace: avoid conditional code compilation during option parsing
A default implementation for backend-specific routines is provided in
"trace/default.c", which backends can override by setting "trace_default=no" in
"configure".

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
2011-09-01 10:34:53 +01:00
Lluís 6d8a764e0f trace: [configure] rename CONFIG_*_TRACE into CONFIG_TRACE_*
Provides a more hierarchical view of the variable domain.

Also adds the CONFIG_TRACE_* variables for all backends.

[Stefan added missing 'test' in stap if statement]

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-09-01 10:34:53 +01:00
Stefan Hajnoczi 92196b2f56 block: add cache=directsync parameter to -drive
This patch adds -drive cache=directsync for O_DIRECT | O_SYNC host file
I/O with no disk write cache presented to the guest.

This mode is useful when guests may not be sending flushes when
appropriate and therefore leave data at risk in case of power failure.
When cache=directsync is used, write operations are only completed to
the guest when data is safely on disk.

This new mode is like cache=writethrough but it bypasses the host page
cache.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-08-23 14:15:17 +02:00