PCI devices can be associated with a unique integer index that is
exposed via ACPI. In Linux OS with systemd, this value is used for
provide a NIC device naming scheme that is stable across changes
in PCI slot configuration.
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
There are two links to this document using anchors so they need to be
updated as well.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
This lets the app expose the virtual SCSI or IDE disks as solid state
devices by setting a rate of '1', or rotational media by setting a
rate between 1025 and 65534.
https://bugzilla.redhat.com/show_bug.cgi?id=1498955
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The
<os firmware='efi'>
<firmware type='efi'>
<feature enabled='no' name='enrolled-keys'/>
</firmware>
</os>
repeats the firmware attribute twice. This has no functional benefit, as
evidenced by fact that we use a single struct field to store both
attributes, while needlessly introducing an error scenario. The XML can
just be simplified to:
<os firmware='efi'>
<firmware>
<feature enabled='no' name='enrolled-keys'/>
</firmware>
</os>
which also means that we don't need to emit the empty element
<firmware type='efi'/> for all existing configs too.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
When the firmware auto-selection was introduced it always picked first
usable firmware based on the JSON descriptions on the host. It is
possible to add/remove/change the JSON files but it will always be for
the whole host.
This patch introduces support for configuring the auto-selection per VM
by adding users an option to limit what features they would like to have
available in the firmware.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The original text was not explaining what this attribute actually
controls and could have been interpreted as a control switch for the
Secure boot feature in firmwares.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Kashyap Chamarthy <kchamart@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This introduces support for the QEMU audio settings that are common to
all audio backends. These are expressed in the QAPI schema as settings
common to all backends, but in reality some backends ignore some of
them. For example, some backends are output only. The parser isn't
attempting to apply restrictions that QEMU itself doesn't apply.
<audio id='1' type='pulseaudio'>
<input mixingEngine='yes' fixedSettings='yes' voices='1' bufferLength='100'>
<settings frequency='44100' channels='2' format='s16'/>
</input>
<output mixingEngine='yes' fixedSettings='yes' voices='2' bufferLength='100'>
<settings frequency='22050' channels='4' format='f32'/>
</output>
</audio>
The <settings> child is only valid if fixedSettings='yes'
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
When there are multiple <audio> backends specified, it is possible to
assign a specific one to the VNC server using
<graphics type='vnc'...>
<audio id='1'/>
</graphics>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The current <audio> element only allows an "OSS" audio backend, as this
is all that BHyve needed. This is now extended to cover most QEMU audio
backends. These backends all have a variety of attributes they support,
but this initial impl does the bare minimum, relying on built-in
defaults for everything. The only QEMU backend omitted is "dsound" since
the libvirt QEMU driver is not built on Windows platforms.
The SDL audio driver names are based on the SDL 2.0 drivers. It is not
intended to support SDL 1.2 drivers.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The <graphics type="vnc" .... powerControl="yes"/> option instructs the
VNC server to enable an extension that lets the client perform a
graceful shutdown, reboot and hard reset.
This is enabled by default since it cannot be assumed that the VNC
client user has administrator rights over the guest OS. In the case
where the VNC user is a guest administrator though, it is reasonable
to allow direct power control host side too.
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Before the conversion to using systemd DBus API to set the cpu.shares
there was some magic conversion done by kernel which was documented in
virsh manpage as well. Now systemd errors out if the value is out of
range.
Since we enforce the range for other cpu cgroup attributes 'quota' and
'period' it makes sense to do the same for 'shares' as well.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
When the parser and docs were enhanced to support a <teaming> element
in a generic <hostdev>, the example XML for formatdomain.rst was
cut/pasted from the example for <interface type='hostdev'>. In my
haste I neglected to remove the <mac address='blah'/> element (which
is unused/ignored for generic <hostdev> and change the closing tag
from </interface> to </hostdev>
https://bugzilla.redhat.com/1927984
Fixes: db64acfbda
Reported-by: Yalan Zhang <yalzhang@redhat.com>
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Commit <d505b8af58912ae1e1a211fabc9995b19bd40828> changed the cpu quota
value that reflects what kernel allows but did not update our
documentation.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The <teaming> element in <interface> allows pairing two interfaces
together as a simple "failover bond" network device in a guest. One of
the devices is the "transient" interface - it will be preferred for
all network traffic when it is present, but may be removed when
necessary, in particular during migration, when traffic will instead
go through the other interface of the pair - the "persistent"
interface. As it happens, in the QEMU implementation of this teaming
pair (called "virtio failover" in QEMU) the transient interface is
always a host network device assigned to the guest using VFIO (aka
"hostdev"); the persistent interface is always an emulated virtio NIC.
When support was initially added for <teaming>, it was written to
require that the transient/hostdev device be defined using <interface
type='hostdev'>; this was done because the virtio failover
implementation in QEMU and the virtio guest driver demands that the
two interfaces in the pair have matching MAC addresses, and the only
way libvirt can guarantee the MAC address of a hostdev network device
is to use <interface type='hostdev'>, whose main purpose is to
configure the device's MAC address before handing the device to
QEMU. (note that <interface type='hostdev'> in turn requires that the
network device be an SRIOV VF (Virtual Function), as that is the only
type of network device whose MAC address we can set in a way that will
survive the device's driver init in the guest).
It has recently come up that some users are unable to use <teaming>
because they are running in a container environment where libvirt
doesn't have the necessary privileges or resources to set the VF's MAC
address (because setting the VF MAC is done via the same device's PF
(Physical Function), and the PF is not exposed to libvirt's container).
At the same time, these users *are* able to set the VF's MAC address
themselves in advance of staring up libvirt in the container. So they
could theoretically use the <teaming> feature if libvirt just skipped
the "setting the MAC address" part.
Fortunately, that is *exactly* the difference between <interface
type='hostdev'> (which must be a "hostdev VF") and <hostdev> (a "plain
hostdev" - it could be *any* PCI device; libvirt doesn't know what type
of PCI device it is, and doesn't care).
But what is still needed is for libvirt to provide a small bit of
information on the QEMU commandline argument for the hostdev, telling
QEMU that this device will be part of a team ("failover pair"), and
the id of the other device in the pair.
To make both of those goals simultaneously possible, this patch adds
support for the <teaming> element to plain <hostdev> - libvirt doesn't
try to set any MAC addresses, and QEMU gets the extra commandline
argument it needs)
(actually, this patch adds only the parsing/formatting of the
<teaming> element in <hostdev>. The next patch will actually wire that
into the qemu driver.)
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
For hardware virtualization this is functionally identical to the
existing host-passthrough mode so the same caveats apply.
For emulated guest this exposes the maximum featureset supported by
the emulator. Note that despite being emulated this is not guaranteed
to be migration safe, especially if different emulator software versions
are used on each host.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Many of Xen's text documents have been converted to man pages over
the years, the channel doc being one of them. Replace the broken
channel.txt link with the name of the man page providing the same
information.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Pass the parameter clock rt to qemu to ensure that the
virtual machine is not synchronized with the host time
Signed-off-by: gongwei <gongwei@smartx.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Add virtio related options iommu, ats and packed as driver element attributes
to vsock devices. Ex:
<vsock model='virtio'>
<cid auto='no' address='3'/>
<driver iommu='on'/>
</vsock>
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The current formulation can lead people to believe SCSI
controllers only allow the virtio-scsi model, but really the
only difference is that you have to use model='virtio-scsi'
where you would use model='virtio' for another device.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
The virtio-pmem is a virtio variant of NVDIMM and just like
NVDIMM virtio-pmem also allows accessing host pages bypassing
guest page cache. The difference is that if a regular file is
used to back guest's NVDIMM (model='nvdimm') the persistence of
guest writes might not be guaranteed while with virtio-pmem it
is.
To express this new model at domain XML level, I've chosen the
following:
<memory model='virtio-pmem' access='shared'>
<source>
<path>/tmp/virtio_pmem</path>
</source>
<target>
<size unit='KiB'>524288</size>
</target>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</memory>
Another difference between NVDIMM and virtio-pmem is that while
the former supports NUMA node locality the latter doesn't. And
also, the latter goes onto PCI bus and not into a DIMM module.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
In certain specific cases it might be beneficial to be able to control
the metadata caching of storage image format drivers of a hypervisor.
Introduce XML machinery to set the maximum size of the metadata cache
which will be used by qemu's qcow2 driver.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Add documentation and schema for the new disk transport protocol.
Signed-off-by: Ryan Gahagan <rgahagan@cs.utexas.edu>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Currently, swtpm TPM state file is removed when a transient domain is
powered off or undefined. When we store TPM state on a shared storage
such as NFS and use transient domain, TPM states should be kept as it is.
Add per-TPM emulator option `persistent_sate` for keeping TPM state.
This option only works for the emulator type backend and looks as follows:
<tpm model='tpm-tis'>
<backend type='emulator' persistent_state='yes'/>
</tpm>
Signed-off-by: Eiichi Tsukata <eiichi.tsukata@nutanix.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
On PPC platform it is required that a NVDIMM has an UUID. If none
is provided then libvirt generates one during parsing (see
v6.2.0-rc1~96 and friends). However, the example provided in our
documentation is not valid XML.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Tested-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Tested-by: Han Han <hhan@redhat.com>
The NCR53C90 is the built-in SCSI controller on all sparc machine types,
and some mips and m68k machine types.
The DC390 and AM53C974 are PCI SCSI controllers that can be added to any
PCI machine.
These are only interesting for emulating obsolete hardware platforms.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
QEMU version 4.2 introduced a performance feature under commit
d645e13287 ("kvm: i386: halt poll control MSR support").
This patch adds a new KVM feature 'poll-control' to set this performance
hint for KVM guests. The feature is off by default.
To enable this hint and have libvirt add "-cpu host,kvm-poll-control=on"
to the QEMU command line, the following XML code needs to be added to the
guest's domain description:
<features>
<kvm>
<poll-control state='on'/>
</kvm>
</features>
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Adds documentation for QEMU 9pfs 'fmode' and 'dmode' options.
Signed-off-by: Brian Turek <brian.turek@gmail.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This patch adds new schema and adds support for parsing and formatting
domain configurations that include vdpa devices.
vDPA network devices allow high-performance networking in a virtual
machine by providing a wire-speed data path. These devices require a
vendor-specific host driver but the data path follows the virtio
specification.
When a device on the host is bound to an appropriate vendor-specific
driver, it will create a chardev on the host at e.g. /dev/vhost-vdpa-0.
That chardev path can then be used to define a new interface with
type='vdpa'.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
The 'reporting' suffix of the attribute makes it sound like we
could be reporting something to user. While in fact, this is
purely virtio membaloon <-> QEMU business. Clarify the docs to
make it clear.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
In fee8a61d29 a new attribute to <memballoon/> was introduced:
free-page-reporting. We don't really like hyphens in attribute
names. Use camelCase instead.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This will add the proper documentation and parser support for the free page
reporting feature that is introduced in QEMU 5.1.
Signed-off-by: Nico Pache <npache@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Actual change is "s/``elements``/``feature`` elements/", rest is
reflow.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
"cpu_map.xml" was moved to a directory "cpu_map" and split up into
several files.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
spicevmc is the most common <redirdev> usage. This adds an XML example
for it.
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Currently it is visually at the same indent as <seclabel>. This
fixes it to be grouped it with <devices>
Fixes: d4abb7b45d
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
libvirt doesn't reject this but only one <driver> element takes
effect.
Drop the instance that is already referenced in the previous example
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Extract the validation of transient disk option. We support transient
disks in qemu under the following conditions:
- -blockdev is used
- the disk source is a local file
- the disk type is 'disk'
- the disk is not readonly
Signed-off-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Tested-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Tested-by: Ján Tomko <jtomko@redhat.com>
The resolution of the VNC framebuffer can now be set via the resolution
definition introduced in 5.9.0.
Also, add "gop" to the list of model types the <resolution/>
sub-element is valid for.
Signed-off-by: Fabian Freyer <fabian.freyer@physik.tu-berlin.de>
Signed-off-by: Roman Bogorodskiy <bogorodskiy@gmail.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
In [1], changes were made to remove the existing auto-alignment
for pSeries NVDIMM devices. That design promotes strange situations
where the NVDIMM size reported in the domain XML is different
from what QEMU is actually using. We removed the auto-alignment
and relied on standard size validation.
However, this goes against Libvirt design philosophy of not
tampering with existing guest behavior, as pointed out by Daniel
in [2]. Since we can't know for sure whether there are guests that
are relying on the auto-alignment feature to work, the changes
made in [1] are a direct violation of this rule.
This patch reverts [1] entirely, re-enabling auto-alignment for
pSeries NVDIMM as it was before. Changes will be made to ease
the limitations of this design without hurting existing
guests.
This reverts the following commits:
- commit 2d93cbdea9
Revert "formatdomain.html.in: mention pSeries NVDIMM 'align down' mechanic"
- commit 0ee56369c8
qemu_domain.c: change qemuDomainMemoryDeviceAlignSize() return type
- commit 07de813924
qemu_domain.c: do not auto-align ppc64 NVDIMMs
- commit 0ccceaa57c
qemu_validate.c: add pSeries NVDIMM size alignment validation
- commit 4fa2202d88
qemu_domain.c: make qemuDomainGetMemorySizeAlignment() public
[1] https://www.redhat.com/archives/libvir-list/2020-July/msg02010.html
[2] https://www.redhat.com/archives/libvir-list/2020-September/msg00572.html
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Even though this was brought up in upstream discussion [1] it
missed my patches: users should prefer <oemStrings/> over fwcfg.
The reason is that fwcfg is considered somewhat internal to QEMU
and it has limited number of slots and neither of these applies
to <oemStrings/>.
While I'm at it, I'm fixing the example too (because it contains
incorrect element name) and clarifying sysfs/ exposure.
1: https://www.redhat.com/archives/libvir-list/2020-May/msg00957.html
Reported-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
By default Xen only allows guests to write "known safe" values into PCI
configuration space, yet many devices require writes to other areas of
the configuration space in order to operate properly. To allow writing
any values Xen supports the 'permissive' setting, see xl.cfg(5) man page.
This change models Xen's permissive setting by adding a writeFiltering
attribute on the <source> element of a PCI hostdev. When writeFiltering
is set to 'no', the Xen permissive setting will be enabled and guests
will be able to write any values into the device's configuration space.
The permissive setting remains disabled in the absense of the
writeFiltering attribute, of if it is explicitly set to 'yes'.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Signed-off-by: Simon Gaiser <simon@invisiblethingslab.com>
Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Use https: links for websites that support them.
The URIs which are used as namespace identifiers
are left alone.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Reviewed-by: Neal Gompa <ngompa13@gmail.com>
