Commit 1da48c6 called the new member "memory" after commit 3949e59
standardized "ringbuf". Rename for consistency.
However, member name "memory" is visible in QMP since 1.5. It's
undocumented just like the driver name. Keep it working anyway.
Cc: qemu-stable@nongnu.org
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1374849874-25531-4-git-send-email-armbru@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This reverts commit 6a85e60cb9.
Commit 51767e7 "qemu-char: Add new char backend CirMemCharDriver"
introduced a memory ring buffer character device driver named
"memory". Commit 3949e59 "qemu-char: Saner naming of memchar stuff &
doc fixes" changed the driver name to "ringbuf", along with a whole
bunch of other names, with the following rationale:
Naming is a mess. The code calls the device driver
CirMemCharDriver, the public API calls it "memory", "memchardev",
or "memchar", and the special commands are named like
"memchar-FOO". "memory" is a particularly unfortunate choice,
because there's another character device driver called
MemoryDriver. Moreover, the device's distinctive property is that
it's a ring buffer, not that's in memory.
This is what we released in 1.4.0.
Unfortunately, the rename missed a critical instance of "memory": the
actual driver name. Thus, the new device could be used only by an
entirely undocumented name. The documented name did not work.
Bummer.
Commit 6a85e60 fixes this by changing the documentation to match the
code. It also changes some, but not all related occurences of
"ringbuf" to "memory". Left alone are identifiers in C code, HMP and
QMP commands. The latter are external interface, so they can't be
changed.
The result is an inconsistent mess. Moreover, "memory" is a rotten
name. The device's distinctive property is that it's a ring buffer,
not that's in memory. User's don't care whether it's in RAM, flash,
or carved into chocolate tablets by Oompa Loompas.
Revert the commit. Next commit will fix just the bug.
Cc: qemu-stable@nongnu.org
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1374849874-25531-2-git-send-email-armbru@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This hunk got lost during merge. It is documentation.
Spotted-by: Peter Lieven <lieven-lists@dlhnet.de>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Using the previous patches, we're now able to timestamp the SETUP
state. Once we have this time, let the user know about it in the
schema.
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Michael R. Hines <mrhines@us.ibm.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
this patch adds a efficient encoding for zero blocks by
adding a new flag indicating a block is completely zero.
additionally bdrv_write_zeros() is used at the destination
to efficiently write these zeroes. depending on the implementation
this avoids that the destination target gets fully provisioned.
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This includes some fixes and enhancements that accumulated in my tree:
pci fixes by dkoch, virtio-net enhancements by akong and mst,
and a fix for xen pc by mst.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge remote-tracking branch 'mst/tags/for_anthony' into staging
pci,net,pc enhancements
This includes some fixes and enhancements that accumulated in my tree:
pci fixes by dkoch, virtio-net enhancements by akong and mst,
and a fix for xen pc by mst.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
# gpg: Signature made Wed 17 Jul 2013 04:44:45 AM CDT using RSA key ID D28D5469
# gpg: Can't check signature: public key not found
# By Don Koch (2) and others
# Via Michael S. Tsirkin
* mst/tags/for_anthony:
pc: don't access fw cfg if NULL
virtio-net: add feature bit for any header s/g
net: add support of mac-programming over macvtap in QEMU side
pci: fix BRDIGE typo
pci-bridge: update mappings for migration/restore
Message-id: 1374054430-21966-1-git-send-email-mst@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
# By Chegu Vinod
# Via Juan Quintela
* quintela/migration.next:
Force auto-convegence of live migration
Add 'auto-converge' migration capability
Introduce async_run_on_cpu()
Message-id: 1373664508-5404-1-git-send-email-quintela@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Currently macvtap based macvlan device is working in promiscuous
mode, we want to implement mac-programming over macvtap through
Libvirt for better performance.
Design:
QEMU notifies Libvirt when rx-filter config is changed in guest,
then Libvirt query the rx-filter information by a monitor command,
and sync the change to macvtap device. Related rx-filter config
of the nic contains main mac, rx-mode items and vlan table.
This patch adds a QMP event to notify management of rx-filter change,
and adds a monitor command for management to query rx-filter
information.
Test:
If we repeatedly add/remove vlan, and change macaddr of vlan
interfaces in guest by a loop script.
Result:
The events will flood the QMP client(management), management takes
too much resource to process the events.
Event_throttle API (set rate to 1 ms) can avoid the events to flood
QMP client, but it could cause an unexpected delay (~1ms), guests
guests normally expect rx-filter updates immediately.
So we use a flag for each nic to avoid events flooding, the event
is emitted once until the query command is executed. The flag
implementation could not introduce unexpected delay.
There maybe exist an uncontrollable delay if we let Libvirt do the
real change, guests normally expect rx-filter updates immediately.
But it's another separate issue, we can investigate it when the
work in Libvirt side is done.
Michael S. Tsirkin: tweaked to enable events on start
Michael S. Tsirkin: fixed not to crash when no id
Michael S. Tsirkin: fold in patch:
"additional fixes for mac-programming feature"
Amos Kong: always notify QMP client if mactable is changed
Amos Kong: return NULL list if no net client supports rx-filter query
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Amos Kong <akong@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
The drive-backup command is similar to the drive-mirror command, except
no guest data written after the command executes gets copied. Add a
sync mode argument which determines whether the entire disk is copied,
just allocated clusters, or only clusters being written to by the guest.
Currently only sync mode 'full' is supported - it copies the entire disk.
For read-only point-in-time snapshots we may only need sync mode 'none'
since the target can be a qcow2 file using the guest's disk as its
backing file (no need to copy the entire disk). Finally, sync mode
'top' is useful if we wish to preserve the backing chain.
Note that this patch just adds the sync mode argument to drive-backup.
It does not implement sync modes 'top' or 'none'. This patch is
necessary so we can add a drive-backup HMP command that behaves like the
existing drive-mirror HMP command and takes a sync mode.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The auto-converge migration capability allows the user to specify if they
choose live migration seqeunce to automatically detect and force convergence.
Signed-off-by: Chegu Vinod <chegu_vinod@hp.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This removes duplicated definitions and documentation by reusing the
existing data type.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
We don't have to duplicate the definition any more now that we may refer
to a type instead.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
The Abort action can be used to test QMP 'transaction' failure. Add it
as the last action to exercise the .abort() and .cleanup() code paths
for all previous actions.
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This patch adds a transactional version of the drive-backup QMP command.
It allows atomic snapshots of multiple drives along with automatic
cleanup if there is a failure to start one of the backup jobs.
Note that QMP events are emitted for block job completion/cancellation
and the block job will be listed by query-block-jobs.
@device: the name of the device whose writes should be mirrored.
@target: the target of the new image. If the file exists, or if it
is a device, the existing file/device will be used as the new
destination. If it does not exist, a new file will be created.
@format: #optional the format of the new destination, default is to
probe if @mode is 'existing', else the format of the source
@mode: #optional whether and how QEMU should create a new image, default is
'absolute-paths'.
@speed: #optional the maximum speed, in bytes per second
@on-source-error: #optional the action to take on an error on the source,
default 'report'. 'stop' and 'enospc' can only be used
if the block device supports io-status (see BlockInfo).
@on-target-error: #optional the action to take on an error on the target,
default 'report' (no limitations, since this applies to
a different block device than @device).
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
@drive-backup
Start a point-in-time copy of a block device to a new destination. The
status of ongoing drive-backup operations can be checked with
query-block-jobs where the BlockJobInfo.type field has the value 'backup'.
The operation can be stopped before it has completed using the
block-job-cancel command.
@device: the name of the device which should be copied.
@target: the target of the new image. If the file exists, or if it
is a device, the existing file/device will be used as the new
destination. If it does not exist, a new file will be created.
@format: #optional the format of the new destination, default is to
probe if @mode is 'existing', else the format of the source
@mode: #optional whether and how QEMU should create a new image, default is
'absolute-paths'.
@speed: #optional the maximum speed, in bytes per second
@on-source-error: #optional the action to take on an error on the source,
default 'report'. 'stop' and 'enospc' can only be used
if the block device supports io-status (see BlockInfo).
@on-target-error: #optional the action to take on an error on the target,
default 'report' (no limitations, since this applies to
a different block device than @device).
Note that @on-source-error and @on-target-error only affect background I/O.
If an error occurs during a guest write request, the device's rerror/werror
actions will be used.
Returns: nothing on success
If @device is not a valid block device, DeviceNotFound
Since 1.6
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This capability allows you to disable dynamic chunk registration
for better throughput on high-performance links.
For example, using an 8GB RAM virtual machine with all 8GB of memory in
active use and the VM itself is completely idle using a 40 gbps infiniband link:
1. x-rdma-pin-all disabled total time: approximately 7.5 seconds @ 9.5 Gbps
2. x-rdma-pin-all enabled total time: approximately 4 seconds @ 26 Gbps
These numbers would of course scale up to whatever size virtual machine
you have to migrate using RDMA.
Enabling this feature does *not* have any measurable affect on
migration *downtime*. This is because, without this feature, all of the
memory will have already been registered already in advance during
the bulk round and does not need to be re-registered during the successive
iteration rounds.
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Chegu Vinod <chegu_vinod@hp.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Tested-by: Chegu Vinod <chegu_vinod@hp.com>
Tested-by: Michael R. Hines <mrhines@us.ibm.com>
Signed-off-by: Michael R. Hines <mrhines@us.ibm.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This exposes throughput (in megabits/sec) through QMP.
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Chegu Vinod <chegu_vinod@hp.com>
Tested-by: Chegu Vinod <chegu_vinod@hp.com>
Tested-by: Michael R. Hines <mrhines@us.ibm.com>
Signed-off-by: Michael R. Hines <mrhines@us.ibm.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Just use the TARGET_NAME free string.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1370349928-20419-6-git-send-email-pbonzini@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Now image info will be retrieved as an embbed json object inside
BlockDeviceInfo, backing chain info and all related internal snapshot
info can be got in the enhanced recursive structure of ImageInfo. New
recursive member *backing-image is added to reflect the backing chain
status.
Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
There's no reason to restrict transactions to operations related to
block devices, so rename the type now before schema introspection stops
us from doing so.
Also change the schema documentation of 'transaction' to not refer to
block devices or snapshots any more.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Now we have memory char device, but the backend name of it
is a little confusion. We actually register it by 'memory', but
the description in qemu-option, the name of open functions
and the new api backend called it 'ringbuf'. It should keep
consistent. This patch named it all to 'memory'.
Signed-off-by: Lei Li <lilei@linux.vnet.ibm.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1369132079-11377-2-git-send-email-lilei@linux.vnet.ibm.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
When register and open a chardev udp, the backend name should be udp
not dgram, and we do not have backend dgram in the chardev list. This
patch makes the new qapi udp backend consistent with the original
udp device.
Signed-off-by: Lei Li <lilei@linux.vnet.ibm.com>
Message-id: 1369032665-18159-2-git-send-email-lilei@linux.vnet.ibm.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This property will be useful for libvirt, as libvirt already has logic
based on low-level feature bits (not feature names), so it will be
really easy to convert the current libvirt logic to something using the
"feature-words" property.
The property will have two main use cases:
- Checking host capabilities, by checking the features of the "host"
CPU model
- Checking which features are enabled on each CPU model
Example output:
$ ./QMP/qmp --path=/tmp/m \
qom-get --path=/machine/icc-bridge/icc/child[0] \
--property=feature-words
item[0].cpuid-register: EDX
item[0].cpuid-input-eax: 2147483658
item[0].features: 0
item[1].cpuid-register: EAX
item[1].cpuid-input-eax: 1073741825
item[1].features: 0
item[2].cpuid-register: EDX
item[2].cpuid-input-eax: 3221225473
item[2].features: 0
item[3].cpuid-register: ECX
item[3].cpuid-input-eax: 2147483649
item[3].features: 101
item[4].cpuid-register: EDX
item[4].cpuid-input-eax: 2147483649
item[4].features: 563346425
item[5].cpuid-register: EBX
item[5].cpuid-input-eax: 7
item[5].features: 0
item[5].cpuid-input-ecx: 0
item[6].cpuid-register: ECX
item[6].cpuid-input-eax: 1
item[6].features: 2155880449
item[7].cpuid-register: EDX
item[7].cpuid-input-eax: 1
item[7].features: 126614521
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Adds "cpu-add id=xxx" QMP command.
cpu-add's "id" argument is a CPU number in a range [0..max-cpus)
Example QMP command:
-> { "execute": "cpu-add", "arguments": { "id": 2 } }
<- { "return": {} }
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
The guest will be in this state when it is panicked.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-id: 0255f263ffdc2a3716f73e89098b96fd79a235b3.1366945969.git.hutao@cn.fujitsu.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Libvirt has no way to probe if an option or property is supported,
This patch introduces a new qmp command to query command line
option information. hmp command isn't added because it's not needed.
Signed-off-by: Amos Kong <akong@redhat.com>
CC: Luiz Capitulino <lcapitulino@redhat.com>
CC: Osier Yang <jyang@redhat.com>
CC: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This reverts commit 4d700430a2 as asked by
Luiz. The patch has been obsoleted by extending MachineInfo structure
by cpu-max field.
Signed-off-by: Michal Novotny <minovotn@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Alter the query-machines QMP command to output information about
maximum number of CPUs for each machine type with default value
set to 1 in case the number of max_cpus is not set.
Signed-off-by: Michal Novotny <minovotn@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Work by Alex to support VGA assignment,
pci and virtio fixes by Stefan, Jason and myself, and a
new qmp event for hotplug support by myself.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge remote-tracking branch 'mst/tags/for_anthony' into staging
virtio,pci,qom
Work by Alex to support VGA assignment,
pci and virtio fixes by Stefan, Jason and myself, and a
new qmp event for hotplug support by myself.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
# gpg: Signature made Tue 26 Mar 2013 02:02:24 PM CDT using RSA key ID D28D5469
# gpg: Can't check signature: public key not found
# By Alex Williamson (13) and others
# Via Michael S. Tsirkin
* mst/tags/for_anthony: (23 commits)
pcie: Add endpoint capability initialization wrapper
roms: switch oldnoconfig to olddefconfig
pcie: Mangle types to match topology
pci: Create and use API to determine root buses
pci: Create pci_bus_is_express helper
pci: Q35, Root Ports, and Switches create PCI Express buses
pci: Allow PCI bus creation interfaces to specify the type of bus
pci: Move PCI and PCIE type defines
pci: Create and register a new PCI Express TypeInfo
exec: assert that RAMBlock size is non-zero
pci: refuse empty ROM files
pci_bridge: Remove duplicate IRQ swizzle function
pci_bridge: Use a default map_irq function
pci: Fix INTx routing notifier recursion
pci_bridge: drop formatting from source
pci_bridge: factor out common code
pci: Teach PCI Bridges about VGA routing
pci: Add PCI VGA helpers
virtio-pci: guest notifier mask without non-irqfd
virtio-net: remove layout assumptions for mq ctrl
...
# By Peter Lieven (9) and others
# Via Juan Quintela
* quintela/migration.next: (22 commits)
Use qemu_put_buffer_async for guest memory pages
Add qemu_put_buffer_async
Use writev ops if available
Store the data to send also in iovec
Update bytes_xfer in qemu_put_byte
Add socket_writev_buffer function
Add QemuFileWritevBuffer QemuFileOps
migration: use XBZRLE only after bulk stage
migration: do not search dirty pages in bulk stage
migration: do not sent zero pages in bulk stage
migration: add an indicator for bulk state of ram migration
migration: search for zero instead of dup pages
bitops: unroll while loop in find_next_bit()
buffer_is_zero: use vector optimizations if possible
cutils: add a function to find non-zero content in a buffer
move vector definitions to qemu-common.h
savevm: Fix bugs in the VMSTATE_VBUFFER_MULTIPLY definition
savevm: Add VMSTATE_STRUCT_VARRAY_POINTER_UINT32
savevm: Add VMSTATE_FLOAT64 helpers
savevm: Add VMSTATE_UINTTL_EQUAL helper
...
during bulk stage of ram migration if a page is a
zero page do not send it at all.
the memory at the destination reads as zero anyway.
even if there is an madvise with QEMU_MADV_DONTNEED
at the target upon receipt of a zero page I have observed
that the target starts swapping if the memory is overcommitted.
it seems that the pages are dropped asynchronously.
this patch also updates QMP to return the number of
skipped pages in MigrationStats.
Signed-off-by: Peter Lieven <pl@kamp.de>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
These commands return the maximum number of CPUs supported by the
currently running emulator instance, as defined in its QEMUMachine
struct.
Signed-off-by: Michal Novotny <minovotn@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
libvirt has a long-standing bug: when removing the device,
it can request removal but does not know when the
removal completes. Add an event so we can fix this in a robust way.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This patch adds 'memory' support to qapi and also switches over
the memory chardev initialization to the new qapi code path.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This patch adds 'vc' support to qapi and also switches over the
vc chardev initialization to the new qapi code path.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This patch adds 'pipe' support to qapi and also switches over the
pipe chardev initialization to the new qapi code path.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This patch adds 'console' support to qapi and also switches over the
console chardev initialization to the new qapi code path.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This patch adds 'stdio' support to qapi and also switches over the
stdio chardev initialization to the new qapi code path.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This patch adds 'braille' support to qapi and also switches over
the braille chardev initialization to the new qapi code path.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This patch adds 'msmouse' support to qapi and also switches over
the msmouse chardev initialization to the new qapi code path.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Markus Armbruster
Juan Quintela
Michael R. Hines
Peter Lieven
Anthony Liguori
Amos Kong
Stefan Hajnoczi
Chegu Vinod
Kevin Wolf
Gerd Hoffmann
Paolo Bonzini
Wenchao Xia
Lei Li
Eduardo Habkost
Igor Mammedov
Hu Tao
Eric Blake
Michal Novotny
Laszlo Ersek
Jason Wang
Corey Bryant
Anthony Green
Michael S. Tsirkin