Commit Graph

385 Commits

Author SHA1 Message Date
Peter Krempa
c6a9e54ce3 qemu: enable blockdev support
Now that all pieces are in place (hopefully) let's enable -blockdev.

We base the capability on presence of the fix for 'auto-read-only' on
files so that blockdev works properly, mandate that qemu supports
explicit SCSI id strings to avoid ABI regression and that the fix for
'savevm' is present so that internal snapshots work.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2019-11-22 12:51:27 +01:00
Peter Krempa
5b4b503be6 qemu: capabilities: Add detection of the 'savevm' fix for -blockdev
The 'savevm' HMP command didn't work properly with blockdev as it tried
to do snapshot of everything including the protocol nodes accessing
files which are not snapshottable. Qemu fixed this bug so now we need to
detect it to allow enabling blockdev.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2019-11-22 12:51:27 +01:00
Peter Krempa
3460fef5a0 qemu: caps: Add capability for dynamic 'auto-read-only' support for files
Initial implementation of 'auto-read-only' didn't reopen the backing
files when needed. For '-blockdev' to work we need to be able to tel
qemu to open a file read-only and change it during blockjobs as we label
backing chains with a sVirt label which does not allow writing. The
dynamic auto-read-only supports this as it reopens files when writing
is demanded.

Add a capability to detect that the posix file based backends support
the dynamic part.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2019-11-22 12:51:27 +01:00
Peter Krempa
73445e49e0 tests: qemucapabilities: Refresh data for unreleased qemu-4.2 on x86_64
The data is captured from qemu v4.2.0-rc2-19-g2061735ff0

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2019-11-22 12:51:27 +01:00
Jiri Denemark
a882db7bea qemu: Probe for default CPU types
QEMU 4.2.0 will report default CPU types used by each machine type and
we will want to start using it.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-11-20 17:22:06 +01:00
Jiri Denemark
e41e3b29be qemu: Probe machine types for both KVM and TCG
Almost all TCG query-machines replies match KVM. The only exceptions are
4.2.0 replies on s390x which differ in the reported default CPU type.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-11-20 17:22:06 +01:00
Jiri Denemark
d5d2d8e34a qemu: Make probed machine types depend on accelerator
Some specifics of machine types may depend on the accelerator and thus
the data should be moved to virQEMUCapsAccel. The TCG machine types are
just copied from the ones probed for KVM to simplify the changes to
qemucapabilitiestest data files.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-11-20 17:22:06 +01:00
Jiri Denemark
a068413e7c qemu: Move machine type data in capabilities cache
In preparation for making machine types dependent on the accelerator,
the <machine> elements are formatted between <cpu type='kvm'> and
<cpu type='tcg'>.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-11-20 17:22:06 +01:00
Jiri Denemark
fe893a19eb qemu: Add virQEMUCaps{Load,Format}Accel
The new functions are designed to load and format capabilities which
depend on the accelerator (host CPU expansion and CPU models).

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-11-20 17:22:06 +01:00
Jiri Denemark
94b9e68263 qemu: Store typename from query-cpu-definitions in qemuCaps
We need to create a mapping between CPU model names and their
corresponding QOM types.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-11-20 17:22:06 +01:00
Jiri Denemark
de0ad11263 tests: Update 4.2.0 capabilities data on ppc64
Generated with "spapr/kvm: Set default cpu model for all machine
classes" fix for QEMU applied.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-11-20 17:22:05 +01:00
Jiri Denemark
10f07def3a tests: Add capabilities for QEMU 4.2.0 on s390x
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-11-20 17:22:05 +01:00
Andrea Bolognani
25c52cb32f qemu: Perform full expansion on ARM
The ARM implementation of query-cpu-model-expansion only
supports full expansion, so we have to make sure we're using
that expansion mode if we want to obtain any useful data.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Tested-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2019-11-07 16:09:14 +01:00
Andrea Bolognani
42bc9d9a9a qemu: Query max-arm-cpu properties
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Tested-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2019-11-07 16:09:09 +01:00
Andrea Bolognani
d1b5c2c5ba qemu: Introduce QEMU_CAPS_ARM_MAX_CPU
Mirrors the existing QEMU_CAPS_X86_MAX_CPU.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Tested-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2019-11-07 16:09:07 +01:00
Andrea Bolognani
448b7f81fc tests: Update capabilities for QEMU 4.2.0 on aarch64
Unfortunately this results in a lot of churn because of the eigth
hundred and change QEMU commits since the file was last touched,
but the only part we actually care about is the fact that the
query-cpu-model-expansion QMP command is now available on aarch64.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Tested-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2019-11-07 16:08:44 +01:00
Andrea Bolognani
c4d6465aa7 tests: testQemuCapsIterate: Pass prefix and version to callback
Right now we're passing a "base" string that contains both,
separated by an underscore. Some changes that we're going to
introduce later will require us to have the version number on its
own, and instead of delegating the task of splitting the two apart
to the callback it make more sense to perform it upfront.

This change results in quite a bit of churn because we're now
using the version number only, without the prefix, to calculate
the dummy microcodeVersion.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
2019-10-24 17:21:14 +02:00
Andrea Bolognani
4d95f557d6 tests: Add capabilities for QEMU 4.2.0 on aarch64
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
2019-10-11 09:37:33 +02:00
Andrea Bolognani
c5330fcefa tests: Add capabilities for QEMU 4.2.0 on ppc64
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
2019-10-11 09:37:25 +02:00
Daniel Henrique Barboza
86a8e5a84c qemu: Add capability for the ccf-assist pSeries feature
Linux kernel 5.1 added a new PPC KVM capability named
KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST, which is exposed to the QEMU guest
since QEMU commit 8ff43ee404d under a new sPAPR capability called
SPAPR_CAP_CCF_ASSIST. This cap indicates whether the processor supports
hardware acceleration for the count cache flush workaround, which
is a software workaround that flushes the count cache on context
switch. If the processor has this hardware acceleration, the software
flush can be shortened, resulting in performance gain.

This hardware acceleration is defaulted to 'off' in QEMU. The reason
is that earlier versions of the Power 9 processor didn't support
it (it is available on Power 9 DD2.3 and newer), and defaulting this
option to 'on' would break migration compatibility between the Power 9
processor class.

However, the user running a P9 DD2.3+ hypervisor might want to create
guests with ccf-assist=on, accepting the downside of only being able
to migrate them only between other P9 DD2.3+ hosts running upstream
kernel 5.1+, to get a performance boost.

This patch adds this new capability to Libvirt, with the name of
QEMU_CAPS_MACHINE_PSERIES_CAP_CCF_ASSIST.

Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
2019-10-09 17:45:09 -04:00
Jonathon Jongsma
9bfcf0f62d qemu: add ramfb capability
Add a qemu capbility to see if the standalone ramfb device is available.

Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
2019-10-09 14:46:30 -04:00
Jiri Denemark
db873ab3bc qemu: Adapt to changed ppc64 CPU model names
QEMU 2.11 for ppc64 changed all CPU model names to lower case. Since
libvirt can't change the model names for compatibility reasons, we need
to translate the matching lower case models to the names known by
libvirt.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-10-09 09:53:41 +02:00
Collin Walling
adb689bc2a qemu_capabilities: introduce QEMU_CAPS_QUERY_CPU_MODEL_COMPARISON
This capability enables comparison of CPU models via QMP.

Signed-off-by: Collin Walling <walling@linux.ibm.com>
Reviewed-by: Daniel Henrique Barboza <danielh413@gmail.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Message-Id: <1568924706-2311-13-git-send-email-walling@linux.ibm.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
2019-10-07 10:10:17 +02:00
Collin Walling
db8bd39f6b qemu_capabilities: introduce QEMU_CAPS_QUERY_CPU_MODEL_BASELINE
This capability enables baselining of CPU models via QMP.

Signed-off-by: Collin Walling <walling@linux.ibm.com>
Reviewed-by: Daniel Henrique Barboza <danielh413@gmail.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Message-Id: <1568924706-2311-9-git-send-email-walling@linux.ibm.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
2019-10-07 10:09:49 +02:00
Peter Krempa
c419a43565 tests: qemucapabilities: Update caps of qemu-4.1 to released version
Now that qemu 4.1 was released we can update the capabilities to the
final form.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
2019-09-27 09:43:37 +02:00
Peter Krempa
19898df4a9 tests: add qemu capabilities data for qemu 4.2
Add capabilities test data for upcoming qemu 4.2.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
2019-09-27 07:20:14 +02:00
Marc-André Lureau
86e068e5d6 qemu: add vhost-user-gpu capabilities checks
Those new devices are available since QEMU 4.1.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-09-24 12:29:29 -04:00
Michal Privoznik
f73e62a17c Revert "qemu: add socket datagram capability"
This reverts commit 0cebb6422a.

This capability is not used anywhere and also it is not contained
in any release so it's safe to just remove it.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-09-19 11:38:44 +02:00
Michal Privoznik
c83412bd3c Revert "Temporarily disable bla"
This reverts commit 385543a543.

I've mistakenly pushed wrong branch.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2019-09-19 11:26:56 +02:00
Michal Privoznik
385543a543 Temporarily disable bla
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2019-09-18 17:01:07 +02:00
Marc-André Lureau
0cebb6422a qemu: add socket datagram capability
Datagram socket is available since qemu 4.0, commit
fdec16e3c2a614e2861f3086b05d444b5d8c3406 ("net/socket: learn to talk
with a unix dgram socket").

Required for slirp-helper communication.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2019-09-06 12:47:47 +02:00
Jiri Denemark
598ec0db68 qemu: Check for drop-cache capability
QEMU 4.0.0 and newer automatically drops caches at the end of migration.
Let's check for this capability so that we can allow migration when disk
cache is turned on.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Acked-By: Peter Krempa <pkrempa@redhat.com>
2019-08-14 09:36:43 +02:00
Andrea Bolognani
8aa75435ff tests: Update replies for QEMU 2.12.0 on aarch64
We have some early replies that don't quite match with how
QEMU 2.12.0 as released behaves.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2019-08-12 16:49:31 +02:00
Jonathon Jongsma
086c19d699 qemu: Add bochs-display capability
Check whether qemu supports the bochs-display device and set a
capability. Update tests.

Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
2019-07-15 10:21:21 +02:00
Peter Krempa
4586b11bed tests: qemucaps: Update 4.1.0 capabilities to a more recent version
Update the capabilities from a non-upstream version (9c70209b63 is not
in qemu.git) to qemu upstream commit 33d6099906 (2019/06/18) so that we
get the QMP schema 'features' field support and are able to detect that
the 'file' block backend supports dynamic auto-read-only.

Note that I've rebuilt this on a machine with a more modern kernel and
microcode which exposes e.g. the recent CPU bug mitigations, thus I
opted to keep the CPU changes rather than trying to do a franken-caps
by updating only the output of query-qmp-schema.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
2019-06-20 09:13:37 +02:00
Jiri Denemark
a3f2c802d2 qemu: Don't use full CPU model expansion
We used type=full expansion on the result of previous type=static
expansion to get all possible spellings of CPU features. Since we can
now translate the QEMU's canonical names to our names, we can drop this
magic and do only type=static CPU model expansion.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-06-20 00:22:39 +02:00
Jiri Denemark
5030a7450b qemu_command: Use canonical names of CPU features
When building QEMU command line, we should use the preferred spelling of
each CPU feature without relying on compatibility aliases (which may be
removed at some point).

The "unavailable-features" CPU property is used as a witness for the
correct names of the features in our translation table.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-06-20 00:22:39 +02:00
Jiri Denemark
6f6401fbae qemu: Probe host CPU after capabilities
The way we call query-cpu-model-expansion will rely on some capabilities
bits. Let's make sure all capabilities are set before probing host CPU.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-06-20 00:22:38 +02:00
Jiri Denemark
0d254bce4e qemu: Probe for "unavailable-features" CPU property
It is similar to "filtered-features" property, which reports CPUID bits
corresponding to disabled features, but more general. The
"unavailable-features" property supports both CPUID and MSR features by
listing their names.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-06-20 00:22:38 +02:00
Jiri Denemark
2a4c232106 qemu: Probe for max-x86_64-cpu type
We will use it to check whether QEMU supports a specific CPU property.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-06-20 00:22:38 +02:00
Jiri Denemark
fb5bde121f tests: Add QEMU caps data for future 4.1.0
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-06-20 00:22:38 +02:00
Eric Blake
6abda7a445 backup: Add two new qemu capabilities
Add two capabilities for testing features required for the upcoming
virDomainBackupBegin: use block-dirty-bitmap-merge as the generic
witness of bitmap support needed for checkpoints (since all of the
bitmap management functionalities were finalized in the same qemu 4.0
release), and the bitmap parameter to nbd-server-add for pull-mode
backup support.  Even though both capabilities are likely to be
present or absent together (that is, it is unlikely to encounter a
qemu that backports only one of the two), it still makes sense to keep
two capabilities as the two uses are orthogonal (full backups don't
require checkpoints, push mode backups don't require NBD bitmap
support, and checkpoints can be used for more than just incremental
backups).

Existing code is not affected by the new capabilities.

Signed-off-by: Eric Blake <eblake@redhat.com>
Acked-by: Peter Krempa <pkrempa@redhat.com>
2019-06-11 21:42:57 -05:00
Andrea Bolognani
124eb803fc qemu: Introduce QEMU_CAPS_MACHINE_VIRT_IOMMU
This capability can be used to figure out whether the
QEMU binary at hand supports the machine type property
we need in order to enable SMMUv3 IOMMU support.

Unfortunately we can't avoid probing the RISC-V binaries
along with the ARM ones, since both architectures have
their own 'virt' machine type.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-06-03 17:40:45 +02:00
Andrea Bolognani
a251095e13 qemu: Only probe available machine types
Since we know the full list of machine types supported
by the QEMU binary when probing machine type properties,
we can save some work (and eventually test suite churn,
as more architecture-specific machine types need to be
probed) by only probing machines that we know exist.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
2019-05-17 14:59:40 +02:00
Andrea Bolognani
35e4c15326 tests: Refresh capabilities for QEMU on ppc64
Now that we're probing machine type properties using the
latest machine type rather than the "spapr-machine" parent,
we can finally discover properties that are not available
on all machine types.

This commit refreshes replies for QEMU 4.0.0 as well as
3.1.0 to show not only that we're actually discovering new
machine type properties this way, but also that the number
of available machine type properties increases with each
subsequent QEMU release.

If qom-list-properties had been available in QEMU 2.10.0,
we could now drop the explicit version number checks for
the QEMU_CAPS_MACHINE_PSERIES_MAX_CPU_COMPAT and
QEMU_CAPS_MACHINE_PSERIES_RESIZE_HPT capabilities, but
unfortunately it wasn't, so we have to keep them around
still.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
2019-05-17 14:59:37 +02:00
Andrea Bolognani
d22c6221fc qemu: Probe canonicalized machine type
Now that we have the list of machine types available when
probing machine type properties, we can list properties for
the canonicalized version of the "pseries" machine type
instead of having to go through "spapr-machine", which we
know to be the parent type for all "pseries-*-machine"
types. By doing this, we'll be able to find even properties
that are only available from a certain versioned machine
type forward, and can't thus be obtained when looking at
the parent type only.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
2019-05-17 14:59:34 +02:00
Andrea Bolognani
295a42e19f qemu: Move call to virQEMUCapsProbeQMPMachineProps()
We're going to need information about available machine types
when probing machine type properties soon, and that means we
have to change the order we call QMP commands.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
2019-05-17 14:59:29 +02:00
Boris Fiuczynski
fb6c1f16c5 tests: Add capabilities for QEMU 4.0.0 on s390x
In addition adjusting iothreads-virtio-scsi-ccw.s390x-latest.args to prevent
accidential drive id exposure by QEMU fixed by commit a1dce96236
(qemu: Use the 'device_id' property of SCSI disks to avoid regressing),
and also adjusting *s390x-latest.args files to qemu deprecation changes made
in commit e8c2c8bd07 (Prefer '-overcommit mem-lock' over -realtime mlock').

Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
2019-05-06 14:49:19 +02:00
Andrea Bolognani
1ec22af93a tests: Add capabilities for QEMU 4.0.0 on ppc64
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Acked-by: Peter Krempa <pkrempa@redhat.com>
2019-05-06 11:57:59 +02:00
Andrea Bolognani
ce478958a3 tests: Add capabilities for QEMU 4.0.0 on aarch64
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Acked-by: Peter Krempa <pkrempa@redhat.com>
2019-05-06 11:57:57 +02:00