docs/system/arm/aspeed: Update Aspeed MiniBMC section to include AST1060 processor

Added details describing AST1060 as a Platform Root of Trust processor board alongside
AST1030 MiniBMC, and extende

docs/system/arm/aspeed: Update Aspeed MiniBMC section to include AST1060 processor

Added details describing AST1060 as a Platform Root of Trust processor board alongside
AST1030 MiniBMC, and extended the list of missing devices to include
SMBus Filter and QSPI Monitor controllers.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20251112030553.291734-13-jamin_lin@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

show more ...

docs/system/arm/aspeed: Update Aspeed and 2700 family boards list

Remove the ast2700-evb entry from the Aspeed family boards list in
the documentation. The AST2700 platform now belongs to the new As

docs/system/arm/aspeed: Update Aspeed and 2700 family boards list

Remove the ast2700-evb entry from the Aspeed family boards list in
the documentation. The AST2700 platform now belongs to the new Aspeed
2700 family group, which has its own dedicated documentation section
and board definitions.

Update the Aspeed 2700 family boards list in the documentation to include
the new ast2700fc board entry.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20251112030553.291734-12-jamin_lin@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

show more ...

aspeed: Deprecate the fby35 machine

There are no functional tests for the 'fby35' machine which makes
harder to determine when something becomes deprecated or unused.

The 'fby35' machine was origin

aspeed: Deprecate the fby35 machine

There are no functional tests for the 'fby35' machine which makes
harder to determine when something becomes deprecated or unused.

The 'fby35' machine was originally added as an example of a multi-SoC
system, with the expectation the models would evolve over time in an
heterogeneous system. This hasn't happened and no public firmware is
available to boot it. It can be replaced by the 'ast2700fc', another
multi-SoC machine based on the newer AST2700 SoCs which are excepted
to receive better support in the future.

Cc: Peter Delevoryas <peter@pjd.dev>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Message-ID: <20251126102424.927527-1-clg@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

show more ...

docs/devel: Correct typo

Correct typo in atomics.rst

Signed-off-by: Alano Song <AlanoSong@163.com>
Reviewed-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Reviewed-by: Thomas Huth <thuth@redhat

docs/devel: Correct typo

Correct typo in atomics.rst

Signed-off-by: Alano Song <AlanoSong@163.com>
Reviewed-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
[AJB: fixed author entry]
Message-ID: <20251204194902.1340008-10-alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

show more ...

docs/devel: update build environment setup documentation

Bring `libvirt-ci` front and centre when discussing dependencies for
QEMU. While we are at it:

- drop links to additional instructions (li

docs/devel: update build environment setup documentation

Bring `libvirt-ci` front and centre when discussing dependencies for
QEMU. While we are at it:

- drop links to additional instructions (libvirt is more upto date)
- compress pkg installs into a table
- call out distro/upstream dep difference in a proper note

Message-ID: <20251204194902.1340008-9-alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

show more ...

docs/interop/vfio-user: update protocol specification

Refresh the protocol specification to the latest version implemented by
libvfio-user. All changes are backward compatible.

Note that QEMU clien

docs/interop/vfio-user: update protocol specification

Refresh the protocol specification to the latest version implemented by
libvfio-user. All changes are backward compatible.

Note that QEMU client itself does not yet implement these extensions,
but as this is now the canonical specification, it needs to be kept up
to date.

Signed-off-by: John Levon <john.levon@nutanix.com>
Link: https://lore.kernel.org/qemu-devel/20251010102453.711072-1-john.levon@nutanix.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

show more ...

docs/devel: Update URL for make-pullreq script

In the submitting-a-pull-request docs, we have a link to the
make-pullreq script which might be useful for maintainers. The
canonical git repo for thi

docs/devel: Update URL for make-pullreq script

In the submitting-a-pull-request docs, we have a link to the
make-pullreq script which might be useful for maintainers. The
canonical git repo for this script has moved; update the link.

Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-id: 20251125164511.255550-1-peter.maydell@linaro.org

show more ...

docs/deprecated: Remove undeprecated SMP description

"Unsupported 'parameter=1' SMP configuration" was proposed to be
deprecated in the commit 54c4ea8f3ae6 ("hw/core/machine-smp: Deprecate
unsupport

docs/deprecated: Remove undeprecated SMP description

"Unsupported 'parameter=1' SMP configuration" was proposed to be
deprecated in the commit 54c4ea8f3ae6 ("hw/core/machine-smp: Deprecate
unsupported "parameter=1" SMP configurations").

But the related code was reverted later in the commit 9d7950edb0cd
("hw/core: allow parameter=1 for SMP topology on any machine").

Thus, this SMP behavior is still valid and is not actually deprecated.

Remove outdated document descriptions.

Reported-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20251121084416.1031466-1-zhao1.liu@intel.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

show more ...

docs: Mention 32-bit PPC host as removed

We removed support for 32-bit PPC hosts in commit 5c1ec5a1ee0
("tcg/ppc: Remove support for 32-bit hosts").

Signed-off-by: Philippe Mathieu-Daudé <philmd@li

docs: Mention 32-bit PPC host as removed

We removed support for 32-bit PPC hosts in commit 5c1ec5a1ee0
("tcg/ppc: Remove support for 32-bit hosts").

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Acked-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20251117171236.80472-3-philmd@linaro.org>

show more ...

docs: Correct release of MIPS deprecations / removals

We are going to release 10.2, not 11.0 :)

Reported-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@l

docs: Correct release of MIPS deprecations / removals

We are going to release 10.2, not 11.0 :)

Reported-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20251117171236.80472-2-philmd@linaro.org>

show more ...

gitlab: add initial ppc64le custom-runner test

This is a plain configure build but I only run a subset of the tests
until the kinks have been worked out.

Reviewed-by: Daniel P. Berrangé <berrange@r

gitlab: add initial ppc64le custom-runner test

This is a plain configure build but I only run a subset of the tests
until the kinks have been worked out.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20251117115523.3993105-13-alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

show more ...

docs/about/emulation: update assets for uftrace plugin documentation

Linaro is discontinuing its fileserver service by end of the year.
Migrate assets to GitHub.

Signed-off-by: Pierrick Bouvier <pi

docs/about/emulation: update assets for uftrace plugin documentation

Linaro is discontinuing its fileserver service by end of the year.
Migrate assets to GitHub.

Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20251117115523.3993105-6-alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

show more ...

vhost-user.rst: clarify when FDs can be sent

Previously the spec did not say where in a message the FDs should be
sent. As I understand it, FDs transferred in ancillary data will
always be received

vhost-user.rst: clarify when FDs can be sent

Previously the spec did not say where in a message the FDs should be
sent. As I understand it, FDs transferred in ancillary data will
always be received along with the first byte of the data they were
sent with, so we should define which byte that is. Going by both
libvhost-user in QEMU and the rust-vmm crate, that byte is the first
byte of the message header. This is important to specify because it
would make back-end implementation significantly more complicated if
receiving file descriptors in the middle of a message had to be
handled.

Signed-off-by: Alyssa Ross <hi@alyssa.is>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20251106192105.3456755-1-hi@alyssa.is>

show more ...

Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* rust: cleanup Error, add &error_fatal bindings
* rust: do not add qemuutil to Rust crates
* rust: migration: allow nested o

Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* rust: cleanup Error, add &error_fatal bindings
* rust: do not add qemuutil to Rust crates
* rust: migration: allow nested offset_of
* rust: add back to Ubuntu 22.04 jobs
* checkpatch: remove bogus patch prefix warning

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# gpg: Signature made Tue 04 Nov 2025 05:29:44 PM CET
# gpg: using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg: issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [unknown]
# gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# 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

* tag 'for-upstream' of https://gitlab.com/bonzini/qemu:
rust: add back to Ubuntu 22.04 jobs
rust: migration: allow nested offset_of
rust: do not add qemuutil to Rust crates
rust: pull error_fatal out of SysbusDeviceMethods::sysbus_realize
rust/util: replace Error::err_or_unit/err_or_else with Error::with_errp
rust/util: use anyhow's native chaining capabilities
rust/util: add ensure macro
scripts/checkpatch.pl: remove bogus patch prefix warning

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

Merge tag 'hw-misc-20251104' of https://github.com/philmd/qemu into staging

Misc HW patches

- Add RPMB emulation to eMMC model
- Use generic MachineState::fdt field in microvm machine
- Remove dead

Merge tag 'hw-misc-20251104' of https://github.com/philmd/qemu into staging

Misc HW patches

- Add RPMB emulation to eMMC model
- Use generic MachineState::fdt field in microvm machine
- Remove dead code in ac97_realize()

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# -----END PGP SIGNATURE-----
# gpg: Signature made Wed 05 Nov 2025 09:56:35 AM CET
# gpg: using RSA key FAABE75E12917221DCFD6BB2E3E32C2CDEADC0DE
# gpg: Good signature from "Philippe Mathieu-Daudé (F4BUG) <f4bug@amsat.org>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: FAAB E75E 1291 7221 DCFD 6BB2 E3E3 2C2C DEAD C0DE

* tag 'hw-misc-20251104' of https://github.com/philmd/qemu:
hw/audio: Remove dead code from ac97_realize
hw/i386/microvm: Use fdt field from MachineState
docs: Add eMMC device model description
scripts: Add helper script to generate eMMC block device images
hw/sd/sdcard: Handle RPMB MAC field
hw/sd/sdcard: Add basic support for RPMB partition
hw/sd/sdcard: Allow user creation of eMMCs
hw/sd/sdcard: Fix size check for backing block image

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

docs: Add eMMC device model description

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
M

docs: Add eMMC device model description

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <b9c3ff21e7170fef5d0e7d08698a113d2a64e649.1762261430.git.jan.kiszka@siemens.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

show more ...

Merge tag 'pull-qapi-2025-11-04' of https://repo.or.cz/qemu/armbru into staging

QAPI patches for 2025-11-04

# -----BEGIN PGP SIGNATURE-----
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Merge tag 'pull-qapi-2025-11-04' of https://repo.or.cz/qemu/armbru into staging

QAPI patches for 2025-11-04

# -----BEGIN PGP SIGNATURE-----
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# gpg: Signature made Tue 04 Nov 2025 01:56:09 PM CET
# gpg: using RSA key 354BC8B3D7EB2A6B68674E5F3870B400EB918653
# gpg: issuer "armbru@redhat.com"
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" [unknown]
# gpg: aka "Markus Armbruster <armbru@pond.sub.org>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867 4E5F 3870 B400 EB91 8653

* tag 'pull-qapi-2025-11-04' of https://repo.or.cz/qemu/armbru:
qapi: Add documentation format validation
docs/interop: Add test to keep vhost-user.json sane
docs/interop/firmware: Literal block markup
docs/interop/vhost-user: Belatedly convert "Example" section
docs/interop: Refill QAPI doc comments to conform to conventions
qga/qapi-schema: Clean up whitespace between definitions
qga/qapi-schema: Refill doc comments to conform to conventions
qapi: Clean up whitespace between definitions
qapi: Refill doc comments to conform to conventions
qapi/audio: Fix description markup of AudiodevDBusOptions @nsamples
meson: Add missing backends.py to qapi_gen_depends
qapi/command: Avoid generating unused qmp_marshal_output_T()

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

rust: add back to Ubuntu 22.04 jobs

Ubuntu is now including updated versions of Rust (up to 1.85) for
its LTS releases. Adjust the CI containers and re-add --enable-rust
to the Ubuntu jobs.

Signed

rust: add back to Ubuntu 22.04 jobs

Ubuntu is now including updated versions of Rust (up to 1.85) for
its LTS releases. Adjust the CI containers and re-add --enable-rust
to the Ubuntu jobs.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

show more ...

Merge tag 'staging-pull-request' of https://gitlab.com/peterx/qemu into staging

mem + migration pull for 10.2

- Fabiano's patch to fix snapshot crash by rejecting some caps
- Marco's mapped-ram sup

Merge tag 'staging-pull-request' of https://gitlab.com/peterx/qemu into staging

mem + migration pull for 10.2

- Fabiano's patch to fix snapshot crash by rejecting some caps
- Marco's mapped-ram support on snapshot save/load
- Steve's cpr maintainers entry update on retirement
- Peter's coverity fixes
- Chenyi's tdx fix on hugetlbfs regression
- Peter's doc update on migrate resume flag
- Peter's doc update on HMP set parameter for cpr-exec-command's char** parsing
- Xiaoyao's guest-memfd fix for enabling shmem
- Arun's fix on error_fatal regression for migration errors
- Bin's fix on redundant error free for add block failures
- Markus's cleanup around MigMode sets
- Peter's two patches (out of loadvm threadify) to cleanup qio read peek process
- Thomas's vmstate-static-checker update for possible deprecation of argparse use
- Stefan's fix on windows deadlock by making unassigned MMIOs lockless

# -----BEGIN PGP SIGNATURE-----
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# -----END PGP SIGNATURE-----
# gpg: Signature made Mon 03 Nov 2025 10:06:04 PM CET
# gpg: using EDDSA key B9184DC20CC457DACF7DD1A93B5FCCCDF3ABD706
# gpg: issuer "peterx@redhat.com"
# gpg: Good signature from "Peter Xu <xzpeter@gmail.com>" [unknown]
# gpg: aka "Peter Xu <peterx@redhat.com>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: B918 4DC2 0CC4 57DA CF7D D1A9 3B5F CCCD F3AB D706

* tag 'staging-pull-request' of https://gitlab.com/peterx/qemu: (36 commits)
migration: Introduce POSTCOPY_DEVICE state
migration: Make postcopy listen thread joinable
migration: Respect exit-on-error when migration fails before resuming
migration: Refactor all incoming cleanup info migration_incoming_destroy()
migration: Introduce postcopy incoming setup and cleanup functions
migration: Move postcopy_ram_listen_thread() to postcopy-ram.c
migration: Do not try to start VM if disk activation fails
migration: Flush migration channel after sending data of CMD_PACKAGED
system/physmem: mark io_mem_unassigned lockless
scripts/vmstate-static-checker: Fix deprecation warnings with latest argparse
migration: vmsd errp handlers: return bool
migration/vmstate: stop reporting error number for new _errp APIs
tmp_emulator: improve and fix use of errp
migration: vmstate_save_state_v(): fix error path
migration: Properly wait on G_IO_IN when peeking messages
io: Add qio_channel_wait_cond() helper
migration: Put Error **errp parameter last
migration: Use bitset of MigMode instead of variable arguments
migration: Use unsigned instead of int for bit set of MigMode
migration: Don't free the reason after calling migrate_add_blocker
...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

Merge tag 'pull-target-arm-20251103' of https://gitlab.com/pm215/qemu into staging

target-arm queue:
* allow KVM accelerator on imx8mp-evk
* docs/devel/testing/fuzzing: Note that you can get qtest

Merge tag 'pull-target-arm-20251103' of https://gitlab.com/pm215/qemu into staging

target-arm queue:
* allow KVM accelerator on imx8mp-evk
* docs/devel/testing/fuzzing: Note that you can get qtest to read from a file

# -----BEGIN PGP SIGNATURE-----
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# zuNSj8Ugiq60jgmRxZAQ9w==
# =Zqu+
# -----END PGP SIGNATURE-----
# gpg: Signature made Mon 03 Nov 2025 04:46:21 PM CET
# gpg: using RSA key E1A5C593CD419DE28E8315CF3C2525ED14360CDE
# gpg: issuer "peter.maydell@linaro.org"
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [unknown]
# gpg: aka "Peter Maydell <pmaydell@gmail.com>" [unknown]
# gpg: aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [unknown]
# gpg: aka "Peter Maydell <peter@archaic.org.uk>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83 15CF 3C25 25ED 1436 0CDE

* tag 'pull-target-arm-20251103' of https://gitlab.com/pm215/qemu:
docs/devel/testing/fuzzing: Note that you can get qtest to read from a file
hw/arm/imx8mp-evk: Fix guest time in KVM mode
hw/arm/imx8mp-evk: Add KVM support

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

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docs/interop: Add test to keep vhost-user.json sane

We did this for firmware.json in commit d4181658dfb (docs: add test
for firmware.json QAPI).

Signed-off-by: Markus Armbruster <armbru@redhat.com>

docs/interop: Add test to keep vhost-user.json sane

We did this for firmware.json in commit d4181658dfb (docs: add test
for firmware.json QAPI).

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Message-ID: <20251103082354.3273027-10-armbru@redhat.com>

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docs/interop/firmware: Literal block markup

A few doc comments show command line snippets. The snippets are
indented, which is legible enough. Actually formatting these with
Sphinx would fail with

docs/interop/firmware: Literal block markup

A few doc comments show command line snippets. The snippets are
indented, which is legible enough. Actually formatting these with
Sphinx would fail with "Unexpected indentation", though. We don't so
far. Add suitable markup anyway.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Message-ID: <20251103082354.3273027-9-armbru@redhat.com>

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docs/interop/vhost-user: Belatedly convert "Example" section

These are gone since 3c5f6114d9f (qapi: remove "Example" doc section).

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by:

docs/interop/vhost-user: Belatedly convert "Example" section

These are gone since 3c5f6114d9f (qapi: remove "Example" doc section).

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Message-ID: <20251103082354.3273027-8-armbru@redhat.com>

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docs/interop: Refill QAPI doc comments to conform to conventions

For legibility, wrap text paragraphs so every line is at most 70
characters long. Consistently separate sentences with two spaces.
C

docs/interop: Refill QAPI doc comments to conform to conventions

For legibility, wrap text paragraphs so every line is at most 70
characters long. Consistently separate sentences with two spaces.
Consistently separate member descriptions with a blank line.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Message-ID: <20251103082354.3273027-7-armbru@redhat.com>

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qapi/command: Avoid generating unused qmp_marshal_output_T()

qmp_marshal_output_T() is only ever called by qmp_marshal_C() for a
command C that returns type T.

We've always generated it as a static

qapi/command: Avoid generating unused qmp_marshal_output_T()

qmp_marshal_output_T() is only ever called by qmp_marshal_C() for a
command C that returns type T.

We've always generated it as a static function on demand, i.e. when we
generate a call.

Since we split up monolithic generated code into modules (commit
252dc3105fc "qapi: Generate separate .h, .c for each module"), we do
this per module. As noted in the commit message, this can result in
identical (static) qmp_marshal_output_T() in several modules. Was
deemed not worth avoiding.

A bit later, we added 'if' conditionals to the schema language (merge
commit 5dafaf4fbce).

When a conditional definition uses a type, then its condition must
imply the type's condition. We made this the user's responsibility.
Hasn't been an issue in practice.

However, the sharing of qmp_marshal_output_T() among commands
complicates matters. To avoid both undefined function errors and
unused function warnings, qmp_marshal_output_T() must be defined
exactly when it's used. It is used when any of the qmp_marshal_C()
calling it is defined, i.e. when any C's condition holds.

The generator uses T's condition instead. To avoid both error and
warning, T's condition must be the conjunction of all C's conditions.

Unfortunately, this can be impossible:

* Conditional command returning a builtin type

A builtin type cannot be conditional. This is noted in a FIXME
comment.

* Commands in multiple modules where the conjunction differs between
modules

An instance of this came up recently. we have unconditional
commands returning HumanReadableText. If we add a conditional one
to a module that does not have unconditional ones, compilation fails
with "defined but not used". If we make HumanReadableText
conditional to fix this module, we break the others.

Instead of complicating the code to compute the conjunction, simplify
it: generate the output marshaling code right into qmp_marshal_C().

This duplicates it when multiple commands return the same type. The
impact on code size is negligible: qemu-system-x86_64's text segment
grows by 1448 bytes.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20250804130602.903904-1-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
[Commit message typos fixed]

show more ...