Cloud-Hypervisor is capable of running VMs with kvm or mshv as the
hypervisor on Linux Host. Guest to hypevisor ABI with mshv hypervisor is
the same as in the case of VIR_DOMAIN_VIRT_HYPERV. So, VIR_DOMAIN_VIRT_HYPERV
type will be reused to represent the config with Linux Host and mshv as the
hypervisor.
While initializing ch driver, check if either of /dev/kvm or /dev/mshv
device is present on the host. Before starting ch domains, check if the
requested hypervisor device is present on the host.
Users can specify hypervisor in ch guests's domain definitions like
below:
<domain type='kvm'>
_or_
<domain type='hyperv'>
Signed-off-by: Praveen K Paladugu <prapal@linux.microsoft.com>
Signed-off-by: Praveen K Paladugu <praveenkpaladugu@gmail.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
With Unix mode, pass a socket path to cloud-hypervisor.
Cloud-Hypervisor will attach guest's serial port to this socket path.
Users can connect to the serial port using one of the following commands:
`socat -,crnl UNIX-CONNECT:<path/to/socket>`
OR
`minicom --device unix#<path/to/socket>`
Signed-off-by: Praveen K Paladugu <prapal@linux.microsoft.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Unix Socket backend is only supported for serial port in
cloud-hypervisor. Add relevant checks in chValidateDomainDeviceDef.
Signed-off-by: Praveen K Paladugu <prapal@linux.microsoft.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Currently all machine types which do honour '-usb' are already covered
by code which will either select a proper controller model or would
select the same one which '-usb' would use.
Thus all of the legacy -usb controller code can be removed.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
- 'virt*' machines already don't allow downgrade
- 'versatilepb' and 'realview' machines use 'pci-ohci' controller with '-usb'
- all other machines ignore '-usb' (some have sysbus-based USB
controller which we don't even consider)
For the 'versatilepb' and 'realview' machines libvirt would already
resort to picking either an existing controller model or trying to pick
the one which '-usb' would select and thus fail either way.
All other machine types ignore it.
We can thus remove the fallback for all arm-based machines.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
- 'pseries' machines already don't allow downgrade
- 'g3beige' and 'mac99' machines use 'pci-ohci' controller with '-usb'
- all other machines ignore '-usb'
For 'g3beige' and 'mac99' libvirt already has 'pci-ohci' as contoller it
would select as one of the options when picking a model, thus it's
impossible to reach situation when '-usb' would be honoured.
All other machine types ignore it.
We can thus remove the fallback for all ppc-based machines.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
The default USB device auto-selection code for 'pseries' machines picks
controller models which are also selected when '-usb' is used thus it's
impossible to end up in the case when using '-usb' would be possible:
$ qemu-system-ppc64 --machine pseries,usb=on
qemu-system-ppc64: could not find a module for type 'nec-usb-xhci'
$ qemu-system-ppc64 --machine pseries-2.5,usb=on
qemu-system-ppc64: could not find a module for type 'pci-ohci'
Remove the impossible downgrade and adjust tests.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
- 'q35' machine type already explicitly forbids fallback
- 'isapc' never supported USB and '-usb' is ignored
- 'i440fx' does support '-usb' and translates it into 'piix3-uhci' which
is identical to what libvirt selects
- we currently don't care about 'microvm'
Attempting to start an 'pc' (i440fx) machine with -usb when 'piix3-uhci'
is compiled out will fail and in any other case libvirt will use the
proper explicitly selected controller.
Drop the '-usb' downgrade for x86 arch.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
This controller is used as the default/implicit USB controller by
multiple machine types which honour the '-usb' flag of qemu. Add it as
fallback in libvirt too.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
The machine types historically have a default USB controller populated
via '-usb' which libvirt assumed implicitly. Qemu will use 'pci-ohci'
for both if '-usb' is used.
Unfortunately an USB controller instantiated via '-usb' is unusable as
the bus name libvirt generates doesn't reflect the real name qemu uses,
and thus no libvirt-defined USB devices can be put on the controller.
This patch will populate the default USB controller into the XML and
select it's model to 'pci-ohci' unconditionally as the machine would
fail to start with '-usb' if that controller model is not available.
This patch doesn't try to make any other assumptions about
auto-populated model of USB controllers, which means that for an
explicit USB controller without model a different model will be picked.
Note that this will likely cause ABI differences and break migration for
the two machine types, in the corner case when the default USB
controller would be populated, but given that both are obsolete board
types and USB was unusable it doesn't make sense to keep supporting this
specific case when '-usb' was formatted.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Assign VIR_DOMAIN_CONTROLLER_MODEL_USB_DEFAULT rather than -1.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Most machine types are avaliable in all arches by qemu. This is also
true for the 'versatilepb' machine type example in the tests.
Move all the ARM architectures together so that they are handled in
sync.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Ideally check='partial' would check exactly the features QEMU would want
to enable when asked for a specific CPU model (and features). But there
is no way we could ask QEMU how a specific CPU would look like. So we
use our definition from CPU map, which may slightly differ as QEMU adds
or removes features from CPU models, and thus we may end up checking
features which QEMU would not enable while missing some required ones.
We can do better in specific cases, though. If a CPU definition uses
only a model and disabled features (or none at all), we already know
whether QEMU can enable all features required by the CPU model as that's
what we use to set usable='yes' attribute in the list of available CPU
models in domain capbilities XML. So when a usable CPU model is
requested without asking for additional features (disabling features is
fine) we can avoid our possible inaccurate check using our CPU map.
For backward compatibility we only consider usable models. If a
specified model is not usable, we still check it the old way and even
let QEMU start it (and disable some features) in case our definition
lacks some features compared to QEMU.
Fixes: https://gitlab.com/libvirt/libvirt/-/issues/608
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Recently a kernel bug caused QEMU to report a CPU feature as enabled
while listing it in the "unavailable-features" list of features that
were requested, but could not be enabled. The feature was actually
enabled, but we marked it as disabled when starting a domain. Later when
the domain is migrated, the destination requests the feature to be
disabled, which breaks the guest ABI or if we are lucky QEMU just fails
to load the migration stream.
Let's make similar bugs more visible in the future by refusing to even
start the domain.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
At the moment, any kind of issue being detected in any of the
firmware descriptor files will result in the entire process
being aborted.
In particular, installing a build of edk2 for an architecture
that libvirt doesn't yet know about, for example loongarch64,
will break most firmware-related functionality: it will no
longer be possible to define new EFI VMs, start existing ones,
or even just obtain the domcapabilities for any architecture.
This is obviously unnecessarily harsh. Adopt a more relaxed
approach and simply ignore the firmware descriptors that we
are unable to parse correctly.
https://bugzilla.redhat.com/show_bug.cgi?id=2258946
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Instead of returning the list of paths exactly as obtained
from qemuFirmwareFetchConfigs(), and allocating the list of
firmwares to be exactly that size right away, start with two
empty lists and add elements to them one by one.
At the moment this only makes things more verbose, but later
we're going to change things so that it's possible that some
of the paths/firmwares are not included in the lists returned
to the caller, and at that point the changes will pay off.
Note that we can't use g_auto() for the new list of paths,
because until the very last moment it's not null-terminated,
so g_strfreev() wouldn't be able to handle it correctly.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
In a couple of cases, we were reporting an error without
actually terminating the parse process.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Ever since this function was introduced in 2012 it could've tried
filling in an extra interface name. That was made worse in 2019 when
the caller functions started accepting NULL arrays of size 0.
This is assigned CVE-2024-1441.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Reported-by: Alexander Kuznetsov <kuznetsovam@altlinux.org>
Fixes: 5a33366f5c0b18c93d161bd144f9f079de4ac8ca
Fixes: d6064e2759a24e0802f363e3a810dc5a7d7ebb15
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Adding 'save' ACL to REMOTE_PROC_NODE_DEVICE_DEFINE_XML to make
REMOTE_PROC_NODE_DEVICE_UPDATE ACLs meaningful.
Fixes: 69f9e7dbc24657e85761f03574779540d0f18315
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Allow to modify a node device by using virNodeDeviceDefineXML() to align
its behavior with other drivers define methods.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Implement the API functions in the node device driver by using mdevctl
modify with the options defined and live.
Instead of increasing the minimum mdevctl version to 1.3.0 in the spec
file to ensure support exists in mdevctl the support is dynamically
checked before using mdevctl.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
A public API method which allows to update or modify objects is
implemented for almost all other objects that have a concept of
persistent definition and activatability. Currently node devices of type
mdev can be persistent and active. This new method allows to update
defined and active node devices as well.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Allow to filter node devices based on their persistent or transient
states.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The configuration of a defined mdev can be modified after the mdev is
started. The defined configuration and the active configuration can
therefore run out of sync. Handle this by storing the modifiable data
which is the mdev type and attributes in two separate active and
defined configurations. mdevctl supports with callout scripts to do an
attribute retrieval of started mdevs which is already implemented in
libvirt.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Refactor attribute handling code into methods for easier reuse.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Create a new structure holding type and attributes as these are
modifiable in a persistent mdev configuration and run out of sync with
the active mdev configuration.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Similar to when actual data is being written to the stream, it is
necessary to acknowledge handling of the client request when a hole is
encountered. This is done later in daemonStreamHandleWrite by sending a
fake zero-length reply if the status variable is set to
VIR_STREAM_CONTINUE. It seems that setting status from the message
header was missed for holes in the introduction of the sparse stream
feature.
Signed-off-by: Vincent Vanlaer <libvirt-e6954efa@volkihar.be>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
As of v9.8.0-rc1~7 we check whether two <memory/> devices don't
overlap (since we allow setting where a <memory/> device should
be mapped to). We do this pretty straightforward, by comparing
start and end address of each <memory/> device combination.
But since only the start address is given (an exposed in the
XML), the end address is computed trivially as:
start + mem->size * 1024
And for majority of memory device types this works. Except for
NVDIMMs. For them the <memory/> device consists of two separate
regions: 1) actual memory device, and 2) label.
Label is where NVDIMM stores some additional information like
namespaces partition and so on. But it's not mapped into the
guest the same way as actual memory device. In fact, mem->size is
a sum of both actual memory device and label sizes. And to make
things a bit worse, both sizes are subject to alignment (either
the alignsize value specified in XML, or system page size if not
specified in XML).
Therefore, to get the size of actual memory device we need to
take mem->size and substract label size rounded up to alignment.
If we don't do this we report there's an overlap between two
NVDIMMs even when in reality there's none.
Fixes: 3fd64fb0e236fc80ffa2cc977c0d471f11fc39bf
Fixes: 91f9a9fb4fc0d34ed8d7a869de3d9f87687c3618
Resolves: https://issues.redhat.com/browse/RHEL-4452?focusedId=23805174#comment-23805174
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
VIR_CLOSE() sets errno on failure so it's better to use
virReportSystemError() than plain virReportError() as the former
reports errno value too.
Signed-off-by: Adam Julis <ajulis@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The current implementation sets the guest-sync timeout to the
smaller value between the default value (QEMU_AGENT_WAIT_TIME)
and agent->timeout, without considering the timeout passed
via the qga command.
This patch enhances the guest-sync timeout logic to use the
minimum value among the default value, agent->timeout, and
the timeout passed via the qga command.
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/590
Signed-off-by: ray <honglei.wang@smartx.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Move the assumption from the code pre-creating the storage to
qemuMigrationDstPrepareStorage where it's checked for other cases.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Migrating into a 'directory' won't ever work as we ask qemu to emulate a
fat filesystem, so restoring of the files won't be possible. Same for
'vhost-user' disks which don't support blockjobs as there's no block
backend used in qemu.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Check the existance of storage per-type rather than trying to come up
with a common "path".
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Now that we have a switch statement, the code adding the 'slice' for
block devices of non-equal sizes can be moved to appropriate location.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Automatically free helper variables, remove the 'cleanup' label and
use virBufferCurrentContent() to take the XML from the buffer rather
than extracting it to a separate variable.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Allow storage migration of VDPA devices by properly checking that they
exist on the destionation. Pre-creation is not supported but if the
device exists the migration should be able to succeed.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Decrease the likelyhood that addition of a new storage type will be
forgotten.
This patch also unifies the type check to consult the 'actual' type of
the storage in both cases as the NVMe check looked for the XML declared
type while virStorageSourceIsLocalStorage() looks for the
actual/translated type.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Previously, the script would only detect differences between
libvirt's and qemu's list of x86 features, adding those features
to libvirt was a manual and error prone procedure.
Replace with a script that can generate libvirt's feature list
directly from qemu source code.
Usage: sync_qemu_features_i386.py [--output OUTPUT] [qemu]
If not specified otherwise, "output" defaults to x86_features.xml
in the same directory as sync_qemu_features_i386.py. If a checkout
of the qemu source code resides next to the libvirt directory, it
will be found automatically and need not be specified.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Use "0x%08x" as format for all values:
sed \
-e "s/'0x\(..\)'/'0x000000\\1'/g" \
-e "s/'0x\(...\)'/'0x00000\\1'/g"
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
commit v9.10.0-129-g8b93d78c83 (first appearing in libvirt-10.0.0) was
supposed to allow forcing a PCI hostdev to be bound to a particular
driver by adding <driver model='blah'/> to the XML for the
device. Unfortunately, a single line was missed during the final
changes to the patch prior to pushing, and the result was that the
driver model could be set to *anything* and it would be accepted but
just ignored.
This patch adds the missing line, which will set the stubDriverName
field of the virPCIDevice object from the hostdev object as the
virPCIDevice is being created. This ends up being used by
virPCIDeviceBindToStub() as the driver that it binds the device to.
Fixes: 8b93d78c8325f1fba5db98848350f3db43f5e7d5
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This option controls whether the sysctl config for enabling unprivileged
userfaultfd will be installed.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
/dev/userfaultfd device is preferred over userfaultfd syscall for
post-copy migrations. Unless qemu driver is configured to disable mount
namespace or to forbid access to /dev/userfaultfd in cgroup_device_acl,
we will copy it to the limited /dev filesystem QEMU will have access to
and label it appropriately. So in the default configuration post-copy
migration will be allowed even without enabling
vm.unprivileged_userfaultfd sysctl.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Our virSecret XML is still parsed and formatted using old way
(e.g. virXPathString() + virXXXTypeFromString() combo, or
formatting elements using plain virBufferAsprintf() instead of
virXMLFormatElement()). Modernize the code as it'll make it
easier for future expansion.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Convert the field and adjust the XML parsers to use
virXMLPropEnum().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The virSecretDefParseUsage() function is called conditionally.
Call it unconditionally and keep pointer to the <usage/> node as
it'll come handy soon.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
