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  1. 10 8月, 2015 3 次提交
    • L
      conf: add new <target> subelement with chassisNr attribute to <controller> · 8dc88aee
      由 Laine Stump 提交于 
      There are some configuration options to some types of pci controllers
that are currently automatically derived from other parts of the
controller's configuration. For example, in qemu a pci-bridge
controller has an option that is called "chassis_nr"; up until now
libvirt has always set chassis_nr to the index of the pci-bridge. So
this:

  <controller type='pci' model='pci-bridge' index='2'/>

will always result in:

  -device pci-bridge,chassis_nr=2,...

on the qemu commandline. In the future we may decide there is a better
way to derive that option, but even in that case we will need for
existing domains to retain the same chassis_nr they were using in the
past - that is something that is visible to the guest so it is part of
the guest ABI and changing it would lead to problems for migrating
guests (or just guests with very picky OSes).

The <target> subelement has been added as a place to put the new
"chassisNr" attribute that will be filled in by libvirt when it
auto-generates the chassisNr; it will be saved in the config, then
reused any time the domain is started:

  <controller type='pci' model='pci-bridge' index='2'>
    <model type='pci-bridge'/>
    <target chassisNr='2'/>
  </controller>

The one oddity of all this is that if the controller configuration
is changed (for example to change the index or the pci address
where the controller is plugged in), the items in <target> will
*not* be re-generated, which might lead to conflict. I can't
really see any way around this, but fortunately if there is a
material conflict qemu will let us know and we will pass that on
to the user.
      8dc88aee
    • L
      qemu: implement <model> subelement to <controller> · 572ebdbc
      由 Laine Stump 提交于 
      This patch provides qemu support for the contents of <model> in
<controller> for the two existing PCI controller types that need it
(i.e. the two controller types that are backed by a device that must
be specified on the qemu commandline):

1) pci-bridge - sets <model> name attribute default as "pci-bridge"

2) dmi-to-pci-bridge - sets <model> name attribute default as
   "i82801b11-bridge".

These both match current hardcoded practice.

The defaults are set at the end of qemuDomainAssignPCIAddresses().
This can't be done earlier because some of the options that will be
autogenerated need full PCI address info for the controller, and
because qemuDomainAssignPCIAddresses() might create extra controllers
which would need default settings added, and that hasn't yet been done
at the time the PostParse callbacks are being run.
qemuDomainAssignPCIAddresses() is still called prior to the XML being
written to disk, though, so the autogenerated defaults are persistent.

qemu capabilities bits aren't checked when the domain is defined, but
rather when the commandline is actually created (so the domain can
possibly be defined on a host that doesn't yet have support for the
given device, or a host different from the one where it will
eventually be run). When the commandline is being generated we compare
the modelName to known qemu device names implementing the given type
of controller, and check the capabilities bit for that device.
      572ebdbc
    • L
      conf: add new <model> subelement with name attribute to <controller> · bf202510
      由 Laine Stump 提交于 
      This new subelement is used in PCI controllers: the toplevel
*attribute* "model" of a controller denotes what kind of PCI
controller is being described, e.g. a "dmi-to-pci-bridge",
"pci-bridge", or "pci-root". But in the future there will be different
implementations of some of those types of PCI controllers, which
behave similarly from libvirt's point of view (and so should have the
same model), but use a different device in qemu (and present
themselves as a different piece of hardware in the guest). In an ideal
world we (i.e. "I") would have thought of that back when the pci
controllers were added, and used some sort of type/class/model
notation (where class was used in the way we are now using model, and
model was used for the actual manufacturer's model number of a
particular family of PCI controller), but that opportunity is long
past, so as an alternative, this patch allows selecting a particular
implementation of a pci controller with the "name" attribute of the
<model> subelement, e.g.:

  <controller type='pci' model='dmi-to-pci-bridge' index='1'>
    <model name='i82801b11-bridge'/>
  </controller>

In this case, "dmi-to-pci-bridge" is the kind of controller (one that
has a single PCIe port upstream, and 32 standard PCI ports downstream,
which are not hotpluggable), and the qemu device to be used to
implement this kind of controller is named "i82801b11-bridge".

Implementing the above now will allow us in the future to add a new
kind of dmi-to-pci-bridge that doesn't use qemu's i82801b11-bridge
device, but instead uses something else (which doesn't yet exist, but
qemu people have been discussing it), all without breaking existing
configs.

(note that for the existing "pci-bridge" type of PCI controller, both
the model attribute and <model> name are 'pci-bridge'. This is just a
coincidence, since it turns out that in this case the device name in
qemu really is a generic 'pci-bridge' rather than being the name of
some real-world chip)
      bf202510
  3. 09 8月, 2015 1 次提交
    • L
      conf: more useful error message when pci function is out of range · f8fe8f03
      由 Laine Stump 提交于 
      If a pci address had a function number out of range, the error message
would be:

  Insufficient specification for PCI address

which is logged by virDevicePCIAddressParseXML() after
virDevicePCIAddressIsValid returns a failure.

This patch enhances virDevicePCIAddressIsValid() to optionally report
the error itself (since it is the place that decides which part of the
address is "invalid"), and uses that feature when calling from
virDevicePCIAddressParseXML(), so that the error will be more useful,
e.g.:

  Invalid PCI address function=0x8, must be <= 7

Previously, virDevicePCIAddressIsValid didn't check for the
theoretical limits of domain or bus, only for slot or function. While
adding log messages, we also correct that ommission. (The RNG for PCI
addresses already enforces this limit, which by the way means that we
can't add any negative tests for this - as far as I know our
domainschematest has no provisions for passing XML that is supposed to
fail).

Note that virDevicePCIAddressIsValid() can only check against the
absolute maximum attribute values for *any* possible PCI controller,
not for the actual maximums of the specific controller that this
device is attaching to; fortunately there is later more specific
validation for guest-side PCI addresses when building the set of
assigned PCI addresses. For host-side PCI addresses (e.g. for
<hostdev> and for network device pools), we rely on the error that
will be logged when it is found that the device doesn't actually
exist.

This resolves:

  https://bugzilla.redhat.com/show_bug.cgi?id=1004596
      f8fe8f03
  5. 07 8月, 2015 3 次提交
  7. 06 8月, 2015 6 次提交
  9. 05 8月, 2015 6 次提交
    • P
      qemu: Forbid image pre-creation for non-shared storage migration · 6da3b694
      由 Peter Krempa 提交于 
      Libvirt doesn't reliably know the location of the backing chain when
pre-creating images for non-shared migration. This isn't a problem for
full copy, but incremental copy requires the information.

Forbid pre-creating the image in cases where incremental migration is
required. This limitation can perhaps be lifted once libvirt will fully
support loading of backing chain information from the XML.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1249587
      6da3b694
    • A
      cpu: Indentation changes in the ppc64 driver · 4ff3e939
      由 Andrea Bolognani 提交于
      4ff3e939
    • A
      cpu: Rename {powerpc,ppc} => ppc64 (internal symbols) · 3d151589
      由 Andrea Bolognani 提交于 
      Update the names of the symbols used internally by the driver.

No functional changes.
      3d151589
    • A
      cpu: Rename {powerpc,ppc} => ppc64 (exported symbols) · e89733c4
      由 Andrea Bolognani 提交于 
      Only the symbols exported by the driver have been updated;
the driver implementation itself still uses the old names
internally.

No functional changes.
      e89733c4
    • A
      cpu: Rename {powerpc,ppc} => ppc64 (filesystem) · ef770f01
      由 Andrea Bolognani 提交于 
      The driver only supports VIR_ARCH_PPC64 and VIR_ARCH_PPC64LE.

Just shuffling files around and updating the build system
accordingly. No functional changes.
      ef770f01
    • J
      conf: Resolve Coverity FORWARD_NULL · a16871fe
      由 John Ferlan 提交于 
      The recent changes to perform SCSI device address checks during the
post parse callbacks ran afoul of the Coverity checker since the changes
assumed that the 'xmlopt' parameter to virDomainDeviceDefPostParse
would be non NULL (commit id 'ca2cf74e'); however, what was missed
is there was an "if (xmlopt &&" check being made, so Coverity believed
that it could be possible for a NULL 'xmlopt'.

Checking the various calling paths seemingly disproves that. If called
from virDomainDeviceDefParse, there were two other possible calls that
would end up dereffing, so that path could not be NULL. If called via
virDomainDefPostParseDeviceIterator via virDomainDefPostParse there
are two callers (virDomainDefParseXML and qemuParseCommandLine)
which deref xmlopt either directly or through another call.

So I'm removing the check for non-NULL xmlopt.
      a16871fe
  11. 04 8月, 2015 12 次提交
  13. 03 8月, 2015 6 次提交
  15. 31 7月, 2015 2 次提交
  17. 30 7月, 2015 1 次提交