This moves the command from MAINTAINERS sections "Human Monitor (HMP)"
and "QMP" to "Migration".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-19-armbru@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>

This moves these commands from MAINTAINERS sections "Human
Monitor (HMP)" and "QMP" to "Migration".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-18-armbru@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-17-armbru@redhat.com>

This moves these commands from MAINTAINERS sections "Human
Monitor (HMP)" and "QMP" to "Network device backends".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-16-armbru@redhat.com>

Use g_strsplit() for the actual splitting.  Give external linkage, so
the next commit can move one of its users to another source file.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-15-armbru@redhat.com>

This moves these commands from MAINTAINERS section "Human
Monitor (HMP)" to "Rocker" and "Network devices".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-14-armbru@redhat.com>

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-13-armbru@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>

This moves these commands from MAINTAINERS sections "Human
Monitor (HMP)" and "QMP" to "QOM".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-12-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

This moves these commands from MAINTAINERS section "Human
Monitor (HMP)" to "Machine core".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-11-armbru@redhat.com>

This moves these commands from MAINTAINERS section "QMP" to "Machine
core".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-10-armbru@redhat.com>

This moves these commands from MAINTAINERS sections "Human
Monitor (HMP)" and "QMP" to "Tracing".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-9-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

The next commit will move a caller of help_cmd() to a new file.
Including monitor/monitor-internal.h there just for help_cmd() feels
silly.  Better to provide it in monitor/hmp.h suitably renamed.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-8-armbru@redhat.com>

monitor/misc.h has static add_completion_option().  It's useful
elsewhere in the monitor.  Since it's not monitor-specific, move it to
util/readline.c renamed to readline_add_completion_of(), and put it to
use.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-7-armbru@redhat.com>

No need to check for null arguments, no caller passes them.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-6-armbru@redhat.com>

Code moves from MAINTAINERS section "QMP" to "Character device
backends".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-5-armbru@redhat.com>

This moves these commands from MAINTAINERS sections "Human
Monitor (HMP)" and "QMP" to "Character device backends".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-4-armbru@redhat.com>

This moves these commands from MAINTAINERS sections "Human
Monitor (HMP)" and "QMP" to "Overall Audio backends".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-3-armbru@redhat.com>

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-2-armbru@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>

Commit 800d4ded "softmmu: move more files to softmmu/" (v5.2.0)
updated MAINTAINERS for all moved files but one.  Fix that.

Fixes: 800d4ded
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230120170104.359690-1-armbru@redhat.com>

Commit bd688fc9 "accel: introduce accelerator blocker API" aded
include/sysemu/accel-blocker.h and accel/accel-blocker.c.  MAINTAINERS
covers the latter in section "Guest CPU Cores (other accelerators) /
Overall", but not the former.  Fix that.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230119091545.3116376-3-armbru@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>

Commit 0e9b5cd6 "migration: introduce UFFD-WP low-level interface
helpers" added util/userfaultfd.c without covering it in MAINTAINERS.
Add it to section "Migration".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230119091545.3116376-2-armbru@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>

virtio,pc,pci: features, cleanups, fixes

lots of fixes, cleanups

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

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* tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu

: (56 commits)
  docs/pcie.txt: Replace ioh3420 with pcie-root-port
  Revert "vhost-user: Introduce nested event loop in vhost_user_read()"
  Revert "vhost-user: Monitor slave channel in vhost_user_read()"
  tests/qtest/bios-tables-test: Make the test less verbose by default
  hw: Use TYPE_PCI_BUS definition where appropriate
  vhost-user: Skip unnecessary duplicated VHOST_USER_ADD/REM_MEM_REG requests
  tests: acpi: update expected blobs
  pcihp: generate populated non-hotpluggble slot descriptions on non-hotplug path
  tests: acpi: whitelist DSDT before moving non-hotpluggble slots description from hotplug path
  tests: acpi: update expected blobs
  pcihp: acpi: ignore coldplugged bridges when composing hotpluggable slots
  tests: acpi: whitelist DSDT blobs before removing dynamic _DSM on coldplugged bridges
  tests: acpi: update expected blobs
  pcihp: acpi: decouple hotplug and generic slots description
  tests: acpi: whitelist DSDT before decoupling PCI hotplug code from basic slots description
  pcihp: isolate rule whether slot should be described in DSDT
  pci: make sure pci_bus_is_express() won't error out with "discards ‘const’ qualifier"
  pcihp: make bridge describe itself using AcpiDevAmlIfClass:build_dev_aml
  pci: acpi: wire up AcpiDevAmlIf interface to generic bridge
  x86: pcihp: acpi: prepare slot ignore rule to work with self describing bridges
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Python

Bits and pieces, kibbles'n'bits

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* tag 'python-pull-request' of https://gitlab.com/jsnow/qemu

:
  python/qemu/machine: use socketpair() for QMP by default
  python/qmp/legacy: make QEMUMonitorProtocol accept a socket
  python/qmp/protocol: add open_with_socket()
  python/qmp: increase read buffer size
  python/machine: Fix AF_UNIX path too long on macOS
  python: QEMUMachine: enable qmp accept timeout by default
  Fix some typos

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Do not mention ioh3420 in the "how to" doc.
The device still works and can be used by already
existing setups, but no need to be mentioned.

Suggested-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20230123174205.683979-1-berrange@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

This reverts commit a7f523c7.

The nested event loop is broken by design. It's only user was removed.
Drop the code as well so that nobody ever tries to use it again.

I had to fix a couple of trivial conflicts around return values because
of 025faa87 ("vhost-user: stick to -errno error return convention").

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <20230119172424.478268-3-groug@kaod.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Maxime Coquelin <maxime.coquelin@redhat.com>

This reverts commit db8a3772.

Motivation : this is breaking vhost-user with DPDK as reported in [0].

Received unexpected msg type. Expected 22 received 40
Fail to update device iotlb
Received unexpected msg type. Expected 40 received 22
Received unexpected msg type. Expected 22 received 11
Fail to update device iotlb
Received unexpected msg type. Expected 11 received 22
vhost VQ 1 ring restore failed: -71: Protocol error (71)
Received unexpected msg type. Expected 22 received 11
Fail to update device iotlb
Received unexpected msg type. Expected 11 received 22
vhost VQ 0 ring restore failed: -71: Protocol error (71)
unable to start vhost net: 71: falling back on userspace virtio

The failing sequence that leads to the first error is :
- QEMU sends a VHOST_USER_GET_STATUS (40) request to DPDK on the master
  socket
- QEMU starts a nested event loop in order to wait for the
  VHOST_USER_GET_STATUS response and to be able to process messages from
  the slave channel
- DPDK sends a couple of legitimate IOTLB miss messages on the slave
  channel
- QEMU processes each IOTLB request and sends VHOST_USER_IOTLB_MSG (22)
  updates on the master socket
- QEMU assumes to receive a response for the latest VHOST_USER_IOTLB_MSG
  but it gets the response for the VHOST_USER_GET_STATUS instead

The subsequent errors have the same root cause : the nested event loop
breaks the order by design. It lures QEMU to expect responses to the
latest message sent on the master socket to arrive first.

Since this was only needed for DAX enablement which is still not merged
upstream, just drop the code for now. A working solution will have to
be merged later on. Likely protect the master socket with a mutex
and service the slave channel with a separate thread, as discussed with
Maxime in the mail thread below.

[0] https://lore.kernel.org/qemu-devel/43145ede-89dc-280e-b953-6a2b436de395@redhat.com/



Reported-by: Yanghang Liu <yanghliu@redhat.com>
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2155173


Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <20230119172424.478268-2-groug@kaod.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Maxime Coquelin <maxime.coquelin@redhat.com>

We are facing the issues that our test logs in the gitlab CI are
too big (and thus cut off). The bios-tables-test is one of the few
qtests that prints many lines of output by default when running with
V=1, so it contributes to this problem. Almost all other qtests are
silent with V=1 and only print debug messages with V=2 and higher.
Thus let's change the bios-tables-test to behave more like the
other tests and only print the debug messages with V=2 (or higher).

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20230118125132.1694469-1-thuth@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>

Use the proper QOM type definition instead of magic string.
This also helps during eventual refactor while using git-grep.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230117193014.83502-1-philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>

The VHOST_USER_ADD/REM_MEM_REG requests should be categorized into
non-vring specific messages, and should be sent only once.

Signed-off-by: Minghao Yuan <yuanmh12@chinatelecom.cn>
Message-Id: <20230123122119.194347-1-yuanmh12@chinatelecom.cn>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Expected change removal of dynamic _DSM AML for non-hotpluggable
hots-bridge, storage, isa bridge devices from PC machine blobs:

  -            Scope (S00)
  -            {
  -                Name (ASUN, Zero)
  -                Method (_DSM, 4, Serialized)  // _DSM: Device-Specific Method
  -                {
  -                    Local0 = Package (0x02)
  -                        {
  -                            BSEL,
  -                            ASUN
  -                        }
  -                    Return (PDSM (Arg0, Arg1, Arg2, Arg3, Local0))
  -                }
  -            }
  -
  -            Scope (S08)
  -            {
  -                Name (ASUN, One)
  -                Method (_DSM, 4, Serialized)  // _DSM: Device-Specific Method
  -                {
  -                    Local0 = Package (0x02)
  -                        {
  -                            BSEL,
  -                            ASUN
  -                        }
  -                    Return (PDSM (Arg0, Arg1, Arg2, Arg3, Local0))
  -                }
  -            }
  -
  -            Scope (S10)
  -            {
  -                Name (ASUN, 0x02)
  -                Method (_DSM, 4, Serialized)  // _DSM: Device-Specific Method
  -                {
  -                    Local0 = Package (0x02)
  -                        {
  -                            BSEL,
  -                            ASUN
  -                        }
  -                    Return (PDSM (Arg0, Arg1, Arg2, Arg3, Local0))
  -                }
  -            }

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20230112140312.3096331-41-imammedo@redhat.com>

Generating slots descriptions populated by non-hotpluggable devices
is akward at best and complicates hotplug path (build_append_pcihp_slots)
needlessly, and builds only dynamic _DSM for such slots which is overlkill.
Clean it up and let non-hotplug path (build_append_pci_bus_devices)
to handle that task.

Such clean up effectively drops dynamic _DSM methods on non-hotpluggable
slots (even though bus itself is hotpluggable), but in practice it
affects only built-in devices (ide controllers/various bridges) that don't
use acpi-index anyways so effectively it doesn't matter (NICs are hotpluggble).

Follow up series will add static _DSM for non-hotpluggble devices/buses
that will not depend on ACPI PCI hotplug at all, and potentially would
allows us to reuse non-hotplug path elsewhere (PBX/microvm/arm-virt),
including new support for acpi-index for non-hotpluggable devices.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20230112140312.3096331-40-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20230112140312.3096331-39-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

expected change is removal of dynamic _DSM bits from slots populated
by coldplugged bridges (something like):

    -            Scope (S18)
    -            {
    -                Name (ASUN, 0x03)
    -                Method (_DSM, 4, Serialized)  // _DSM: Device-Specific Method
    -                {
    -                    Local0 = Package (0x02)
    -                        {
    -                            BSEL,
    -                            ASUN
    -                        }
    -                    Return (PDSM (Arg0, Arg1, Arg2, Arg3, Local0))
    -                }
    -            }

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20230112140312.3096331-38-imammedo@redhat.com>

coldplugged bridges are not unpluggable, so there is no need
to describe slots where they are plugged as hotpluggable. To
that effect we have a condition that marks slot as non-hotpluggable
if it's populated by coldplugged bridge and prevents generation
_SUN/_EJ0 objects for it. That leaves dynamic _DSM method on
such slot (which also depends on BSEL and pcihp hardware).
This _DSM method provides only dynamic acpi-index support so far,
which is not actually used/supported by linux kernel for bridges
and it's doubtful there will be need for it at all.

So it's rather pointless to generate acpi-index related AML
for bridges and we can simplify hotplug slots generator a bit
more by completely ignoring coldplugged bridges on hotplug path.

Another point in favor of dropping dynamic _DSM support, is
that we can replace it with static _DSM if necessary since
a slot with bridge can't change during VM runtime and without
any dependency on ACPI PCI hotplug at that.
Later I plan to implement bridge specific static _DSM
   PCI Firmware Specification 3.2
   4.6.5.  _DSM for Ignoring PCI Boot Configurations
part of spec, to fix longstanding issue with fixed IO/MEM
resource assignment that often leads to hotplugged device
being in-operational within the guest due limited IO/MEM
windows programmed on bridge at boot time.

Expected change when coldplugged bridge is ignored by hotplug
code, should look like:
-            Scope (S18)
-            {
-                Name (ASUN, 0x03)
-                Method (_DSM, 4, Serialized)  // _DSM: Device-Specific Method
-                {
-                    Local0 = Package (0x02)
-                        {
-                            BSEL,
-                            ASUN
-                        }
-                    Return (PDSM (Arg0, Arg1, Arg2, Arg3, Local0))
-                }
-            }

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20230112140312.3096331-37-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20230112140312.3096331-36-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Expected change for non-populated slots is that
thay are moved after non-hotpluggable PCI tree description.

And expected change for hotplug capable populated slots is:
  - ...
  +                Name (BSEL, 0x03)
  +                Scope (S00)
  +                {
  +                    Name (ASUN, Zero)
  +                    Method (_DSM, 4, Serialized)  // _DSM: Device-Specific Method
  +                    {
  +                        Local0 = Package (0x02)
  +                            {
  +                                BSEL,
  +                                ASUN
  +                            }
  +                        Return (PDSM (Arg0, Arg1, Arg2, Arg3, Local0))
  +                    }
  [ ... other hotplug depended bits ]
  +                }

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20230112140312.3096331-35-imammedo@redhat.com>

Split build_append_pci_bus_devices() onto generic part that builds
AML descriptions only for populated slots which is applicable to
both hotplug disabled and enabled bridges. And a hotplug only
part that complements generic AML with hotplug depended bits
(that depend on BSEL), like _SUN/_EJ0 entries, dynamic _DSM.

Hotplug part, will generate full 'Device' descriptors for
non-populated slots (like it used to be) and complementary
'Scope' descriptors for populated slots that are hotplug capable.
i.e. something like this:
  - ...
  +                Name (BSEL, 0x03)
  +                Scope (S00)
  +                {
  +                    Name (ASUN, Zero)
  +                    Method (_DSM, 4, Serialized)  // _DSM: Device-Specific Method
  +                    {
  +                        Local0 = Package (0x02)
  +                            {
  +                                BSEL,
  +                                ASUN
  +                            }
  +                        Return (PDSM (Arg0, Arg1, Arg2, Arg3, Local0))
  +                    }
  +  [ ... other hotplug depended bits ]
  +                }

While generic build_append_pci_bus_devices() still calls hotplug part at
its end it doesn't really depend on any hotplug bits anymore and later
both could be completely separated when it's necessary.

Main benefit though is that both build_append_pci_bus_devices() and
build_append_pcihp_slots() become more readable and it makes easier
to modify them with less risk of affecting another part. Also it opens
possibility to re-use generic part elsewhere (microvm, arm/virt).

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20230112140312.3096331-34-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20230112140312.3096331-33-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20230112140312.3096331-32-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

function doesn't need RW aceess to passed in bus pointer,
make it const.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20230112140312.3096331-31-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>