Commit Graph

81726 Commits

Author SHA1 Message Date
Thomas Huth
ff82a54bc4 tests/test-char: Use a proper fallthrough comment
For being able to compile with -Werror=implicit-fallthrough we need
to use comments that the compiler recognizes. Use "fallthrough" instead
of "no break" here.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20201002171343.283426-1-thuth@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2020-10-13 13:33:45 +02:00
Philippe Mathieu-Daudé
009f51df0e hw/block/nvme: Simplify timestamp sum
As the 'timestamp' variable is declared as a 48-bit bitfield,
we do not need to wrap the sum result.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
Message-Id: <20201002075716.1657849-1-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2020-10-13 13:33:45 +02:00
Cleber Rosa
ea8bf1e514 scripts/ci/gitlab-pipeline-status: wait for pipeline creation
When called in wait mode, this script will also wait for the pipeline
to be get to a "running" state.  Because many more status may be seen
until a pipeline gets to "running", and those need to be handle too.

Reference: https://docs.gitlab.com/ee/api/pipelines.html#list-project-pipelines
Signed-off-by: Cleber Rosa <crosa@redhat.com>
Message-Id: <20200904164258.240278-8-crosa@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 12:48:17 +02:00
Cleber Rosa
176498ab57 scripts/ci/gitlab-pipeline-status: use more descriptive exceptions
For two very different error conditions.

Signed-off-by: Cleber Rosa <crosa@redhat.com>
Message-Id: <20200904164258.240278-7-crosa@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 12:48:17 +02:00
Cleber Rosa
79df438eeb scripts/ci/gitlab-pipeline-status: handle keyboard interrupts
So that exits based on user requests are handled more gracefully.

Signed-off-by: Cleber Rosa <crosa@redhat.com>
Message-Id: <20200904164258.240278-6-crosa@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 12:48:17 +02:00
Cleber Rosa
91641d555a scripts/ci/gitlab-pipeline-status: refactor parser creation
Out of the main function.

Signed-off-by: Cleber Rosa <crosa@redhat.com>
Message-Id: <20200904164258.240278-5-crosa@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 12:48:17 +02:00
Cleber Rosa
db5424dfda scripts/ci/gitlab-pipeline-status: give early feedback on running pipelines
When waiting for a pipeline to run and finish, it's better to give
early feedback, and then sleep and wait, than the other wait around.

Specially for the first iteration, it's frustrating to see nothing
while the script is sleeping.

Signed-off-by: Cleber Rosa <crosa@redhat.com>
Message-Id: <20200904164258.240278-4-crosa@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 12:48:17 +02:00
Cleber Rosa
6dfcbff8bf scripts/ci/gitlab-pipeline-status: improve message regarding timeout
The script has its own timeout, which is about how long the script
will wait (when called with --wait) for the pipeline to complete, and
not necessarily for the pipeline to complete.

Hopefully this new wording will be clearer.

Signed-off-by: Cleber Rosa <crosa@redhat.com>
Message-Id: <20200904164258.240278-3-crosa@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 12:48:17 +02:00
Cleber Rosa
d914375070 scripts/ci/gitlab-pipeline-status: make branch name configurable
With the utility function `get_local_staging_branch_commit()`, the
name of the branch is hard coded (including in the function name).

For extensibility reasons, let's make that configurable.

Signed-off-by: Cleber Rosa <crosa@redhat.com>
Message-Id: <20200904164258.240278-2-crosa@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 12:48:17 +02:00
Daniel P. Berrangé
4fb716360a gitlab: assign python helper files to GitLab maintainers section
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20200918132903.1848939-4-berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 12:48:17 +02:00
Daniel P. Berrangé
34ed46a284 gitlab: add a CI job to validate the DCO sign off
While checkpatch.pl can validate DCO sign off that job must always be
advisory only since it is expected that certain patches will fail some
code style rules.

We require the DCO sign off to be mandatory for all commits though, so
it benefits from being validated in a standalone job.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20200918132903.1848939-3-berrange@redhat.com>
[thuth: Use "stage: build" to let it run earlier]
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 12:48:17 +02:00
Daniel P. Berrangé
1f47547256 gitlab: add a CI job for running checkpatch.pl
This job is advisory since it is expected that certain patches will fail
the style checks and checkpatch.pl provides no way to mark exceptions to
the rules.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20200918132903.1848939-2-berrange@redhat.com>
[thuth: Use "stage: build" to let it run earlier]
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 12:48:17 +02:00
Yonggang Luo
5f8937d63f configure: fixes indent of $meson setup
convert these line from tab to space

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20201012234348.1427-2-luoyonggang@gmail.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 12:48:17 +02:00
Thomas Huth
4258c8e221 docs/system/deprecated: Mark the 'moxie' CPU as deprecated
It is currently unclear whether anybody is still using the 'moxie' CPU,
and there are no images for testing available this CPU, so the code has
likely bit-rotten in the course of time. When I asked the maintainer
for information, I did not get a reply within four weeks yet (see
https://lists.gnu.org/archive/html/qemu-devel/2020-08/msg07201.html).
The last Signed-off-by line from Anthony in our repo is from 2013,
so it seems like this code is rather unmaintained. Time to put it onto
the deprecation list to see whether somebody is still interested in this
code or whether we could remove it in a couple of releases.

Message-Id: <20200923171815.97801-1-thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 12:48:17 +02:00
Thomas Huth
2ae00c8b2f Remove superfluous .gitignore files
Since we are now always doing out-of-tree builds, these gitignore
files should not be necessary anymore.

Message-Id: <20200919133637.72744-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 12:48:17 +02:00
Thomas Huth
520ddc18bf MAINTAINERS: Ignore bios-tables-test in the qtest section
I'm very often getting CC: on rather large patch series that
modify the ACPI stuff of either ARM or x86, just because the
bios-table-test is often slightly involved here. I can't say
much about ACPI, and the bios-table-test is already covered
by the ACPI section in MAINTAINERS, so I'd rather prefer to
not getting automatically CC-ed on such patch series anymore.
If people want my opinion about qtest-related changes, they
can still put me on CC manually.

Message-Id: <20201001042717.136033-1-thuth@redhat.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 12:48:17 +02:00
Ani Sinha
07f5903c85 Add a comment in bios-tables-test.c to clarify the reason behind approach
A comment is added in bios-tables-test.c that explains the reasoning
behind the process of updating the ACPI table blobs when new tests are added
or old tests are modified or code is committed that affect tests. The
explanation would help future contributors follow the correct process when
making code changes that affect ACPI tables.

Signed-off-by: Ani Sinha <ani@anisinha.ca>
Acked-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20200929142501.1057-1-ani@anisinha.ca>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 12:48:17 +02:00
Thomas Huth
eaf65114f0 softmmu/vl: Be less verbose about missing KVM when running the qtests
Some of the qtests use "-accel kvm -accel tcg" to run real guest code.
This causes some error messages when kvm is not available. We do not
really care about these messages since the fallback to tcg is expected
here. So let's silence them to avoid that they spoil the output of
the tests.

Unfortunately, we can not use the qtest_enabled() wrapper in this case,
since the qtest accelerator itself is not initialized. Thus we have to
test for the qtest_chrdev variable instead.

Message-Id: <20200710085020.28222-1-thuth@redhat.com>
Reviewed-by: Alexander Bulekov <alxndr@bu.edu>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 12:48:12 +02:00
Dr. David Alan Gilbert
a4339de2de tests/migration: Allow longer timeouts
In travis, with gcov and gprof we're seeing timeouts; hopefully fix
this by increasing the test timeouts a bit, but for xbzrle ensure it
really does get a couple of cycles through to test the cache.

I think the problem in travis is we have about 2 host CPU threads,
in the test we have at least 3:
   a) The vCPU thread (100% flat out)
   b) The source migration thread
   c) The destination migration thread

if (b) & (c) are slow for any reason - gcov+gperf or a slow host -
then they're sharing one host CPU thread so limit the migration
bandwidth.

Tested on my laptop with:
   taskset -c 0,1 ./tests/qtest/migration-test -p /x86_64/migration

Reported-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20201008160330.130431-1-dgilbert@redhat.com>
[thuth: Move the #define to the right location]
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 08:08:55 +02:00
Li Qiang
d8dd109501 qtest: add fuzz test case
Currently the device fuzzer finds more and more issues.
For every fuzz case, we need not only the fixes but also
the corresponding test case. We can analysis the reproducer
for every case and find what happened in where and write
a beautiful test case. However the raw data of reproducer is not
friendly to analysis. It will take a very long time, even far more
than the fixes itself. So let's create a new file to hold all of
the fuzz test cases and just use the raw data to act as the test
case. This way nobody will be afraid of writing a test case for
the fuzz reproducer.

This patch adds the issue LP#1878263 test case.

Signed-off-by: Li Qiang <liq3ea@163.com>
Message-Id: <20200921160605.19329-1-liq3ea@163.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alexander Bulekov <alxndr@bu.edu>
[thuth: Slightly adjusted commit message, removed empty lines]
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 08:08:55 +02:00
Cleber Rosa
ec4d2feb27 Acceptance tests: show test report on GitLab CI
Avocado will, by default, produce JUnit files.  Let's ask GitLab
to present those in the web UI.

Signed-off-by: Cleber Rosa <crosa@redhat.com>
Message-Id: <20201009205513.751968-4-crosa@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 08:08:55 +02:00
Cleber Rosa
52dff28569 Acceptance tests: do not show canceled test logs on GitLab CI
Tests resulting in "CANCEL" in Avocado are usually canceled on
purpose, and are almost identical to "SKIP".  The logs for canceled
tests are adding a lot of noise to the logs being shown on GitLab CI,
and causing distraction from real failures.

As a side note, this "after script" is scheduled for removal once the
feature is implemented within Avocado itself.

Reference: https://github.com/avocado-framework/avocado/issues/4266
Signed-off-by: Cleber Rosa <crosa@redhat.com>
Message-Id: <20201009205513.751968-3-crosa@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 08:08:55 +02:00
Cleber Rosa
d44d9b6bc8 Acceptance tests: bump pycdlib version for easier installation
On with certain versions of "pip", package installations will attempt
to create wheels.  And, on environments without a "complete" Python
installation (as described in the acceptance tests requirements docs),
that will fail.

pycdlib, starting with version 1.11.0, is now being made available
as wheels, so its instalation on those constrained environments is
now possible.

Buglink: https://bugs.launchpad.net/qemu/+bug/1897783
Reported-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Cleber Rosa <crosa@redhat.com>
Message-Id: <20201009205513.751968-2-crosa@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 08:08:55 +02:00
Alexander Bulekov
320c6e7893 gitlab-ci.yml: Only run one test-case per fuzzer
With 1000 runs, there is a non-negligible chance that the fuzzer can
trigger a crash. With this CI job, we care about catching build/runtime
issues in the core fuzzing code. Actual device fuzzing takes place on
oss-fuzz. For these purposes, only running one input should be
sufficient.

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Suggested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20201002143524.56930-1-alxndr@bu.edu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 08:08:55 +02:00
Philippe Mathieu-Daudé
4f3ccd4f16 tests/qtest: Replace magic value by NANOSECONDS_PER_SECOND definition
Use self-explicit NANOSECONDS_PER_SECOND definition instead
of a magic value.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20201011194918.3219195-5-f4bug@amsat.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-13 08:08:55 +02:00
Peter Maydell
724c1c8bb3 * qtest documentation improvements (Eduardo, myself)
* libqtest event buffering (Maxim)
 * use RCU for list of children of a bus (Maxim)
 * move more files to softmmu/ (myself)
 * meson.build cleanups, qemu-storage-daemon fix (Philippe)
 -----BEGIN PGP SIGNATURE-----
 
 iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAl+EfGcUHHBib256aW5p
 QHJlZGhhdC5jb20ACgkQv/vSX3jHroNbRwf/aOYHLDFtZJdalb8/g9X+n0jK/Ew9
 XuSy7vC5xGYcVP+haPfHQD75iiTTm5hEw/ooffAByHSqEFBmPJm5Uogx6eHbXjzm
 rZrsU3MdwfTz/T+XPtp/g3H9mAZ0tQboU5fR7euO6LVGOS+886LDJyIyZpPr6pwH
 XhyzqTcpZhV+aphfCXGRRUlUJuYKaYxXz60VLVVS2k7RnQJvnZP5cpIxD+PnaN6L
 PyA+aL/J4LkUm/nX9NkinJPxmxXBnhk3C+XKPJ1gV54XEC6AiUkoCxeCeBxc/zcU
 AKAIAgMc8D/oMwyRYV+FKDuhRIDGJ+D2h4VOITnyunur7phfQLb5cUM+hA==
 =Pvrq
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/bonzini-gitlab/tags/for-upstream' into staging

* qtest documentation improvements (Eduardo, myself)
* libqtest event buffering (Maxim)
* use RCU for list of children of a bus (Maxim)
* move more files to softmmu/ (myself)
* meson.build cleanups, qemu-storage-daemon fix (Philippe)

# gpg: Signature made Mon 12 Oct 2020 16:55:19 BST
# gpg:                using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg:                issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini-gitlab/tags/for-upstream: (38 commits)
  meson: identify more sections of meson.build
  scsi/scsi_bus: fix races in REPORT LUNS
  virtio-scsi: use scsi_device_get
  scsi/scsi_bus: Add scsi_device_get
  scsi/scsi-bus: scsi_device_find: don't return unrealized devices
  device-core: use atomic_set on .realized property
  scsi: switch to bus->check_address
  device-core: use RCU for list of children of a bus
  device_core: use drain_call_rcu in in qmp_device_add
  scsi/scsi_bus: switch search direction in scsi_device_find
  qdev: add "check if address free" callback for buses
  qemu-iotests, qtest: rewrite test 067 as a qtest
  qtest: check that drives are really appearing and disappearing
  qtest: switch users back to qtest_qmp_receive
  device-plug-test: use qtest_qmp to send the device_del command
  qtest: remove qtest_qmp_receive_success
  qtest: Reintroduce qtest_qmp_receive with QMP event buffering
  qtest: rename qtest_qmp_receive to qtest_qmp_receive_dict
  meson.build: Re-enable KVM support for MIPS
  build-sys: fix git version from -version
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-10-12 22:48:45 +01:00
Markus Armbruster
32048d724d target/i386/cpu: Update comment that mentions Texinfo
Missed in commit 41fba1618b "docs/system: convert the documentation of
deprecated features to rST."

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200929075824.1517969-3-armbru@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2020-10-12 23:11:32 +02:00
Markus Armbruster
a64627edcc qemu-img-cmds.hx: Update comment that mentions Texinfo
Missed in 3c95fdef94 "Update comments in .hx files that mention
Texinfo".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200929075824.1517969-2-armbru@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2020-10-12 23:11:32 +02:00
Paolo Bonzini
a0c9162c82 meson: identify more sections of meson.build
Add more headers that clarify code organization.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:52 -04:00
Maxim Levitsky
8cfe8013ba scsi/scsi_bus: fix races in REPORT LUNS
Currently scsi_target_emulate_report_luns iterates over the child device list
twice, and there is no guarantee that this list is the same in both iterations.

The reason for iterating twice is that the first iteration calculates
how much memory to allocate.  However if we use a dynamic array we can
avoid iterating twice, and therefore we avoid this race.

Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1866707

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20200913160259.32145-10-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20201006123904.610658-14-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:51 -04:00
Maxim Levitsky
07a47d4a18 virtio-scsi: use scsi_device_get
This will help us to avoid the scsi device disappearing
after we took a reference to it.

It doesn't by itself forbid case when we try to access
an unrealized device

Suggested-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20200913160259.32145-9-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20201006123904.610658-13-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:51 -04:00
Maxim Levitsky
8ff3449560 scsi/scsi_bus: Add scsi_device_get
Add scsi_device_get which finds the scsi device
and takes a reference to it.

Suggested-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20200913160259.32145-8-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20201006123904.610658-12-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:51 -04:00
Paolo Bonzini
8ddf958e8d scsi/scsi-bus: scsi_device_find: don't return unrealized devices
The device core first places a device on the bus and then realizes it.
Make scsi_device_find avoid returing such devices to avoid
races in drivers that use an iothread (currently virtio-scsi)

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1812399

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20200913160259.32145-7-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20201006123904.610658-11-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:51 -04:00
Maxim Levitsky
a23151e8cc device-core: use atomic_set on .realized property
Some code might race with placement of new devices on a bus.
We currently first place a (unrealized) device on the bus
and then realize it.

As a workaround, users that scan the child device list, can
check the realized property to see if it is safe to access such a device.
Use an atomic write here too to aid with this.

A separate discussion is what to do with devices that are unrealized:
It looks like for this case we only call the hotplug handler's unplug
callback and its up to it to unrealize the device.
An atomic operation doesn't cause harm for this code path though.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20200913160259.32145-6-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20201006123904.610658-10-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:51 -04:00
Paolo Bonzini
42a90a899e scsi: switch to bus->check_address
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20201006123904.610658-6-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:51 -04:00
Maxim Levitsky
2d24a64661 device-core: use RCU for list of children of a bus
This fixes the race between device emulation code that tries to find
a child device to dispatch the request to (e.g a scsi disk),
and hotplug of a new device to that bus.

Note that this doesn't convert all the readers of the list
but only these that might go over that list without BQL held.

This is a very small first step to make this code thread safe.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20200913160259.32145-5-mlevitsk@redhat.com>
[Use RCU_READ_LOCK_GUARD in more places, adjust testcase now that
 the delay in DEVICE_DELETED due to RCU is more consistent. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20201006123904.610658-9-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:50 -04:00
Maxim Levitsky
7bed89958b device_core: use drain_call_rcu in in qmp_device_add
Soon, a device removal might only happen on RCU callback execution.
This is okay for device-del which provides a DEVICE_DELETED event,
but not for the failure case of device-add.  To avoid changing
monitor semantics, just drain all pending RCU callbacks on error.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Suggested-by: Stefan Hajnoczi <stefanha@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20200913160259.32145-4-mlevitsk@redhat.com>
[Don't use it in qmp_device_del. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:50 -04:00
Maxim Levitsky
7a8202c521 scsi/scsi_bus: switch search direction in scsi_device_find
This change will allow us to convert the bus children list to RCU,
while not changing the logic of this function

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20200913160259.32145-2-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:50 -04:00
Paolo Bonzini
bb755ba47f qdev: add "check if address free" callback for buses
Check if an address is free on the bus before plugging in the
device.  This makes it possible to do the check without any
side effects, and to detect the problem early without having
to do it in the realize callback.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20201006123904.610658-5-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:50 -04:00
Paolo Bonzini
d8a18da56d qemu-iotests, qtest: rewrite test 067 as a qtest
Test 067 from qemu-iotests is executing QMP commands to hotplug
and hot-unplug disks, devices and blockdevs.  Because the power
of the text-based test harness is limited, it is actually limiting
the checks that it does, for example by skipping DEVICE_DELETED
events.

tests/qtest already has a similar test, drive_del-test.c.
We can merge them, and even reuse some of the existing code in
drive_del-test.c.  This will improve the quality of the test by
covering DEVICE_DELETED events and testing multiple architectures
(therefore covering multiple PCI hotplug mechanisms as well as s390x
virtio-ccw).

The only difference is that the new test will always use null-co:// for
the medium rather than qcow2 or raw, but this should be irrelevant for
what the test is covering.  For example there are no "qemu-img check"
runs in 067 that would check that the file is properly closed.

The new tests requires PCI hot-plug support, so drive_del-test
is moved from qemu-system-ppc to qemu-system-ppc64.

Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:50 -04:00
Paolo Bonzini
9a613ddccc qtest: check that drives are really appearing and disappearing
Do not just trust the HMP commands to create and delete the drive, use
query-block to check that this is actually the case.

Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:49 -04:00
Maxim Levitsky
bb1a5b97f7 qtest: switch users back to qtest_qmp_receive
Let test use the new functionality for buffering events.
The only remaining users of qtest_qmp_receive_dict are tests
that fuzz the QMP protocol.

Tested with 'make check-qtest'.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20201006123904.610658-4-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:49 -04:00
Paolo Bonzini
c45a70d8c2 device-plug-test: use qtest_qmp to send the device_del command
Simplify the code now that events are buffered.  There is no need
anymore to separate sending the command and retrieving the response.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:49 -04:00
Maxim Levitsky
5e34005571 qtest: remove qtest_qmp_receive_success
The purpose of qtest_qmp_receive_success was mostly to process events
that arrived between the issueing of a command and the "return"
line from QMP.  This is now handled by the buffering of events
that libqtest performs automatically.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
2020-10-12 11:50:49 -04:00
Maxim Levitsky
c22045bfe6 qtest: Reintroduce qtest_qmp_receive with QMP event buffering
The new qtest_qmp_receive buffers all the received qmp events, allowing
qtest_qmp_eventwait_ref to return them.

This is intended to solve the race in regard to ordering of qmp events
vs qmp responses, as soon as the callers start using the new interface.

In addition to that, define qtest_qmp_event_ref a function which only scans
the buffer that qtest_qmp_receive stores the events to.  This is intended
for callers that are only interested in events that were received during
the last call to the qtest_qmp_receive.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20201006123904.610658-3-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:48 -04:00
Maxim Levitsky
1c3e2a38de qtest: rename qtest_qmp_receive to qtest_qmp_receive_dict
In the next patch a new version of qtest_qmp_receive will be
reintroduced that will buffer received qmp events for later
consumption in qtest_qmp_eventwait_ref

No functional change intended.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:24 -04:00
Huacai Chen
fbc5884ce2 meson.build: Re-enable KVM support for MIPS
After converting from configure to meson, KVM support is lost for MIPS,
so re-enable it in meson.build.

Fixes: fdb75aeff7 ("configure: remove target configuration")
Fixes: 8a19980e3f ("configure: move accelerator logic to meson")
Cc: aolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Message-Id: <1602059975-10115-3-git-send-email-chenhc@lemote.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:24 -04:00
Marc-André Lureau
242fb750bd build-sys: fix git version from -version
Typo introduced with the script.

Fixes: 2c273f32d3 ("meson: generate qemu-version.h")
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reported-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20200929143654.518157-1-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:23 -04:00
Paolo Bonzini
bab88ead6f docs/devel: update instruction on how to add new unit tests
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:23 -04:00
Paolo Bonzini
da00d067ea qtest: unify extra_qtest_srcs and extra_qtest_deps
Currently the extra sources and extra dependencies of qtests are held
in two separate dictionaries.  Use the same trick as tests/meson.build
to combine them into one.  This will make it easier to update the
documentation for unit tests and qtests.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-12 11:50:23 -04:00