It would be nice to be able to test the mediated device capabilities
without having physical hardware which supports it. The 'mtty' kernel
module presents a virtual parent device which is capable of creating
'fake' mediated devices, and as such it would be useful for testing.
However, the 'mtty' device is not part of an existing device subsystem
(e.g. PCI, etc), so libvirt ignores it and it does not get added to the
node device list. And because it does not get added to the node device
list, it cannot be used to create child mdevs using `virsh
nodedev-create`.
There is already a node device type capability
VIR_NODE_DEV_CAP_MDEV_TYPES that indicates whether a device supports
creating child mediated devices, but libvirt assumes that this is a
nested capability (in other words, it assumes that the primary
capability of a device is something like PCI). If we allow this
MDEV_TYPES capability to be a primary device capability, then we can
support virtual devices like 'mtty' as a parent for mediated devices.
See https://bugzilla.redhat.com/show_bug.cgi?id=2107031
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The virNetworkObjSetMacMap() API effectively steals passed
@macmap argument. However, the argument is a plain, first order
pointer. This requires every caller to set the argument to NULL
after the function was called. Let's make the function take
double pointer instead to make it obvious that the argument is
consumed.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Instead of duplicating the list of attributes that are not
allowed for some of the IOMMU models, use two separate switch
statements: one for the attributes and one for the address.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Currently, it's possible to pass various attributes to an IOMMU's
<driver/> element hoping that we enable them in underlying
hypervisor. However, depending on the IOMMU model, some of these
attributes can't be enabled and are simply ignored. This is
suboptimal and we should reject such configuration in the
validate phase.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2101633
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This patch introduces the
<maxphysaddr mode='passthrough'/>
<maxphysaddr mode='emulate' bits='42'/>
sub element of /domain/cpu, which allows specifying the guest virtual CPU
address size. This can be useful if the guest needs to have a large amount
of memory.
If mode='passthrough', the virtual CPU will have the same number of address
bits as the host. If mode='emulate', the mandatory bits attribute specifies
the number of address bits.
Signed-off-by: Dario Faggioli <dfaggioli@suse.com>
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
When no TPM version is provided in the input XML we may default
to version 2.0 (see qemuDomainTPMDefPostParse()). However,
<active_pcr_banks/> are parsed iff a version 2.0 was specified.
This means that this piece of information might be lost.
It's better to parse everything we've been given and then
validate that the configuration is valid.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2084046
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
When parsing a TPM device plenty of virXMLPropString() +
enum2int() combos are used. These can be replaced with
virXMLPropEnum().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
The _virDomainTPMDef structure has 'version' member, which is a
bit misplaced. It's only emulator type of TPM that can have a
version, even our documentation says so:
``version``
The ``version`` attribute indicates the version of the TPM. This attribute
only works with the ``emulator`` backend. The following versions are
supported:
Therefore, move the member into that part of union that's
covering emulated TPM devices.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
In previous commit the VIR_DOMAIN_TPM_VERSION_DEFAULT value was
made just an alias to value of 0. And since all newly allocated
memory is zeroed out (due to use of g_new0()), the def->version
inside of virDomainTPMDefParseXML() is also 0 and thus there is
no need to set it explicitly.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
When "default" version of TPM was provided, our parses accepts it
happily even though the value is forbidden by our RNG and not
documented as accepted value. This is because of < 0 vs <= 0
comparison of virDomainTPMModelTypeFromString() retval.
Make the parser error out explicitly in this case. Users can
always chose to not specify the attribute in which case we pick a
sane default (in qemuDomainDefTPMsPostParse()).
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
When "default" model of a TPM was provided, our parses accepts it
happily even though the value is forbidden by our RNG and not
documented as accepted value. This is because of < 0 vs <= 0
comparison of virDomainTPMModelTypeFromString() retval.
Make the parser error out explicitly in this case. Users can
always chose to not specify the attribute in which case we pick a
sane default (in qemuDomainTPMDefPostParse()).
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Almost all of memory models we currently support allow setting
virDomainMemoryDef::targetNode so that the memory module is
associated with given guest NUMA node. And we do have a check
whether the requested node is within bounds, but it's executed
only when building QEMU's cmd line. Move it into validation
phase.
While this commit is moving the validation to a place that does
not validate all the possible code paths, it's okay, because only
the explicit memory device has user-configurable target node
which could break the assumption.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Normally when an UEFI firmware is marked as read-only, an associated
NVRAM file will be created. Some builds of UEFI firmware, however, wish
to remain stateless and so will be read-only, but never have any NVRAM
file. To represent this concept a 'stateless' tristate bool attribute
is introduced on the <loader/> element.
There are rather a large number of permutations to consider.
With default firmware selection
* <os/>
=> Historic default, no change
* <os>
<loader stateless='yes'/>
</os>
=> Explicit version of historic default, no change
* <os>
<loader stateless='no'/>
</os>
=> Invalid, bios is always stateless
With manual legacy BIOS selection
* <os>
<loader>/path/to/seabios</loader>
...
</os>
=> Historic default, no change
* <os>
<loader stateless='yes'>/path/to/seabios</loader>
...
</os>
=> Explicit version of historic default, no change
* <os>
<loader stateless='no'>/path/to/seabios</loader>
...
</os>
=> Invalid, bios is always stateless
With manual UEFI selection
* <os>
<loader type='pflash'>/path/to/edk2</loader>
...
</os>
=> Historic default, no change
* <os>
<loader type='pflash' stateless='yes'>/path/to/edk2</loader>
...
</os>
=> Skip auto-filling NVRAM / template
* <os>
<loader type='pflash' stateless='no'>/path/to/edk2</loader>
...
</os>
=> Explicit version of historic default, no change
With automatic firmware selection
* <os firmware='bios'/>
=> Historic default, no change
* <os firmware='bios'>
<loader stateless='yes'/>
</os>
=> Explicit version of historic default, no change
* <os firmware='bios'>
<loader stateless='no'/>
</os>
=> Invalid, bios is always stateless
* <os firmware='uefi'/>
=> Historic default, no change
* <os firmware='uefi'>
<loader stateless='yes'/>
</os>
=> Skip auto-filling NVRAM / template
* <os firmware='uefi'>
<loader stateless='no'/>
</os>
=> Explicit version of historic default, no change
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Pattern of using switch instead of a long if else construction is
used everywhere, so I used it here as well to make the code more
consistent (and remove that else after return). I also included
all the values from the enum.
Signed-off-by: Kristina Hanicova <khanicov@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
The else branches are redundant because the execution will never
reach them if the conditions in the previous 'if' branches are
true.
I think this looks cleaner and is more readable, because having
'else' branch indicates that no return / break / goto is in the
previous branch and the function can reach it.
Signed-off-by: Kristina Hanicova <khanicov@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
This patch rewrites conditions to make the code easier to read and less
nested.
Signed-off-by: Kristina Hanicova <khanicov@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
According to a9fe9569ab, the <acpi index='NNN'/> is only for PCI
devices. Remove the ref acpi from devices channel, smartcard, tpm,
redirdev, panic, hub because none of them has PCI address. And add the
ref acpi to iommu device.
Fixes: a9fe9569ab
Signed-off-by: Han Han <hhan@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This patch prevents nesting of if conditions and makes the code
cleaner.
Signed-off-by: Kristina Hanicova <khanicov@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This was not causing any problems because all cases below were empty,
but in order to avoid future misbehavior, add a break to this case.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
There's no need to use virBufferAddStr() for literal strings
without any newline character as it's more expensive than
virBufferAddLit().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Tim Wiederhake <twiederh@redhat.com>
These wrapper functions were used to adapt the virObjectUnref() function
signature for different callbacks. But in commit 0d184072, the
virObjectUnref() function was changed to return a void instead of a
bool, so these adapters are no longer necessary.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Some USB devices have a buggy firmware that either crashes on
device reset, or make the device unusable in some other way.
Fortunately, QEMU offers a way to skip device reset either
completely, or if device is not initialized yet. Expose this
ability to users under:
<hostdev mode='subsystem' type='usb'>
<source guestReset='off'/>
</hostdev>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
When formatting IOThreads (in virDomainDefIOThreadsFormat()), we
may only output the number of IOThreads, or the full list of IOThreads too:
<iothreads>4</iothreads>
<iothreadids>
<iothread id='1' thread_pool_max='10'/>
<iothread id='2' thread_pool_min='2' thread_pool_max='10'/>
<iothread id='3'/>
<iothread id='4'/>
</iothreadids>
Now, the deciding factor here is whether those individual
IOThreads were so called 'autofill-ed' or user provided. Well, we
need to take another factor in: if an IOThread has pool size
limit set, then we ought to format the full list.
But how can we get into a situation when a thread is autofilled
(i.e. not provided by user in the XML) and yet it has pool size
limit set? virDomainSetIOThreadParams() is the answer.
Sure, we could also unset the autofill flag whenever a pool size
limit is being set. But this approach allows us to not format
anything if the limits are reset (we don't lose the autofill
information).
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The <defaultiothread/> element is formatted inside
virDomainDefaultIOThreadDefFormat() which is called only from
virDomainDefIOThreadsFormat() (so that IOThread related stuff is
formatted calling one function). However, when there are no
<iothreadids/> defined (or only autoallocated ones are present),
then the outer formatting function exits early never calling the
<defaultiothread/> formatter.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
We accept TPM version in the domain XML. However, supported
version depends on the host (swtpm_setup binary) and thus it may
be tricky for users (or mgmt applications) chose a version.
Introduce machinery for reporting supported version in domain
capabilities.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Our coding style suggests 80 chars per line with error messages
being exception (for easier git-grep). Apply this exception onto
the newly created domain_postparse.c file.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The domain post parse functions currently live in domain_conf.c
which thus grows always larger. Mimic what we've done for the
validation code and move the post parse code into a separate
file: domain_postparse.c.
I've started by moving every function with PostParse in its name
into the new file and then compile hunting for helper functions
only to move them as well.
In the end, I've moved virDomainDefPostParse symbol in
libvirt_private.syms into a new section. And while
virDomainDeviceDefPostParseOne() is made 'public' in
domain_postparse.h too, I'm not exporting it because it has no
caller outside src/conf/ and it's unlikely it ever will.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The virDomainDefPostParseDeviceIteratorData struct is exported in
domain_conf.h because it's used in both domain_conf.c and
domain_validate.c. However, the latter usage is not warranted,
it's just a shortcut so that we don't have to introduce a similar
struct just for domain_validate.c. Well, do the extra step and
introduce a separate structure for domain_validate.c. This allows
us to move post parse code later on.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
For a qcow2 storage volume with luks encryption created by qemu-img, its
dumped storage vol XML has no secret element in encryption:
<volume type='file'>
...
<encryption format='luks'>
</encryption>
...
</volume>
That will cause a failure in rng validation. Fix that validation failure.
Signed-off-by: Han Han <hhan@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
In my previous commit I've introduced virDomainIOMMUDefValidate()
function with a switch() statement. However, two cases in it,
though empty, were not terminated with a break statement which
made compiler complain.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Per v8.3.0-rc1~199 it's only a virtio IOMMU that can have
<address/>. The rest (Intel and SMMUv3) are system devices and
thus have no address associated with them. However, this
assumption is never checked for.
Fixes: b0eb1e193f5db033d0fbbf91ff71a121066ad77c
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Fix the copy-and-paste error by referring to the correct variable.
Fixes: 0df2e7df80452f81edbfeb0ee355235b533346a9
https://bugzilla.redhat.com/show_bug.cgi?id=2103132
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Treat the 'protocolVer' field as a string so that e.g. '4.1' can be
used. Forbid only ',' in the string as it's a separator of arguments for
mount options.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Regardless of whether firmware autoselection is in use, we
still want to parse the list of requested features. Doing this
will allow us to produce better error messages.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Generally speaking, when firmware autoselection is in use we
don't want any information to be provided manually. There are
two exceptions:
* we still want the path to the NVRAM file to be customizable;
* using <loader secure='yes'/> was how you would ask for a
firmware that implements the Secure Boot feature in the
original approach to firmware autoselection, so we want to
keep that working.
Anything else should result in a descriptive error.
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/327
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This makes it explicit that there are two possible scenarios
(whether or not firmware autoselection is in use) and will make
upcoming changes cleaner to implement.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Currently we're simply ignoring some elements and attributes,
such as the loader path, when firmware autoselection is enabled
because we know we're not going to use them.
This makes sense, but has the unfortunate consequence of
confusing users who experience part of their configuration
simply going away for no apparent reason.
A more user-friendly approach is to produce meaningful error
messages in those scenarios. As a first step towards that goal,
stop conditionally parsing information.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This combination doesn't make sense and so the firmware
autoselection logic will not be able to find a suitable firmware,
but it's more user-friendly to report a detailed error upfront.
Note that this check would ideally happen in the validate phase,
but if we moved it there we would no longer be able to
automatically enable secure-boot when enrolled-keys=yes. Since
the combination never resulted in a working configuration, the
chances of this causing real-world VMs to disappear are
extremely low.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
There are currently no failure scenarios for the function, but
we're about to add one.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
