Riku Voipio doesn't wish to be listed in MAINTAINERS any more;
remove his email from the relevant sections.
This moves the "overall usermode emulation" section to Orphan status.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20260323134741.4114629-2-peter.maydell@linaro.org
I won't have that much time for QEMU anymore in the future, so downgrade
the status of the "functional testing framework" section to "Odd Fixes"
to avoid wrong expectations. While we're at it, also switch to my other
e-mail address here that I'm already using for the other sections where
I am still listed as maintainer / reviewer.
Message-ID: <20260313113424.15583-5-thuth@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
I likely won't have much time in the future for QEMU anymore, so
remove myself from various sections that have already enough other
maintainers / reviewers.
Message-ID: <20260313113424.15583-4-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
I'm going to move to another project next month, so I will not have
enough time to take care of s390x patches anymore. Fortunately,
Cornelia volunteered to take over the job of collecting s390x patches,
and Eric and Matthew offered help to back her up, so we can keep
the "S390 general architecture support" section in the "supported"
state. Thanks for your help, Cornelia, Eric and Matthew!
Message-ID: <20260313113424.15583-3-thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Eric Farman <farman@linux.ibm.com>
Acked-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Chris Browy's listed email address is undeliverable:
The recipient server did not accept our requests to connect; it
times out on attempts to connect by my sending mail server (gmail):
[avery-design.com 99.83.249.127: timed out]
[avery-design.com 75.2.78.167: timed out]
Remove his name from the file.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20260306120555.2035421-7-peter.maydell@linaro.org
Eduardo Habkost doesn't wish to be listed in MAINTAINERS any more;
remove his email, and also the git trees he used to use.
Move the QOM boilerplate conversion script scripts/codeconverter
to "Orphan" status, as it no longer has any listed maintainers.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20260306120555.2035421-4-peter.maydell@linaro.org
Hannes Reinecke doesn't wish to be listed in MAINTAINERS any more;
remove his email from the relevant sections.
As 'megasas' no longer has any listed maintainers, move it to
"Orphan" status.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20260306120555.2035421-2-peter.maydell@linaro.org
Migration pull request
- Fix for races when migration starts again after a failure
- New maintainer for COLO: Lukas Straub
- COLO cleanups and bug fixes
- COLO multifd support
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# gpg: Signature made Mon Mar 9 12:55:27 2026 GMT
# gpg: using RSA key AA1B48B0A22326A5A4C364CFC798DC741BEC319D
# gpg: issuer "farosas@suse.de"
# gpg: Good signature from "Fabiano Rosas <farosas@suse.de>" [unknown]
# gpg: aka "Fabiano Almeida Rosas <fabiano.rosas@suse.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: AA1B 48B0 A223 26A5 A4C3 64CF C798 DC74 1BEC 319D
* tag 'migration-20260309-pull-request' of https://gitlab.com/farosas/qemu: (22 commits)
colo: Reuse the return path from migration on primary and secondary side
migration: Keep s->rp_state.from_dst_file open until migration ends
colo: Use file lock in primary_vm_do_failover()
multifd: Fix hang if send thread errors during sync
qemu-colo.rst: Simplify the block replication setup
qemu-colo.rst: Add my copyright
qemu-colo.rst: Miscellaneous changes
Convert colo main documentation to restructuredText
migration-test: Add COLO migration unit test
colo: Do not hold the BQL while receiving ram state.
colo: Hold the BQL while sending ram state
colo: Fix crash during device vmstate load
Call colo_release_ram_cache() after multifd threads terminate
multifd: Add COLO support
multifd: Move ram state receive into multifd_ram_state_recv()
ram: Remove colo special-casing
colo: Remove ENABLE_COLO savevm command and mark it as deprecated
colo: Replace migration_incoming_colo_enabled() with migrate_colo()
colo: Setup ram cache in normal migration path
MAINTAINERS: Remove Hailiang Zhang from COLO migration framework
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Like in the normal ram_load() path, put the received pages into the
colo cache and mark the pages in the bitmap so that they will be
flushed to the guest later.
Multifd with COLO is useful to reduce the VM pause time during checkpointing
for latency sensitive workloads. In such workloads the worst-case latency
is especially important.
Also, this is already worth it for the precopy phase as it helps with
converging. Moreover, multifd migration is the preferred way to do migration
nowadays and this allows to use multifd compression with COLO.
Benchmark:
Cluster nodes
- Intel Xenon E5-2630 v3
- 48Gb RAM
- 10G Ethernet
Guest
- Windows Server 2016
- 6Gb RAM
- 4 cores
Workload
- Upload a file to the guest with SMB to simulate moderate
memory dirtying
- Measure the memory transfer time portion of each checkpoint
- 600ms COLO checkpoint interval
Results
Plain
idle mean: 4.50ms 99per: 10.33ms
load mean: 24.30ms 99per: 78.05ms
Multifd-4
idle mean: 6.48ms 99per: 10.41ms
load mean: 14.12ms 99per: 31.27ms
Evaluation
While multifd has slightly higher latency when the guest idles, it is
10ms faster under load and more importantly it's worst case latency is
less than 1/2 of plain under load as can be seen in the 99. Percentile.
Co-authored-by: Juan Quintela <quintela@redhat.com>
[farosas: changed SoB to coauthored as Juan doesn't own that email address anymore]
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Link: https://lore.kernel.org/qemu-devel/20260302-colo_unit_test_multifd-v11-8-d653fb3b1d80@web.de
[removed license boilerplate]
Signed-off-by: Fabiano Rosas <farosas@suse.de>
I am not involved in the ppc machines anymore (the pseries machine was
the reason why I took over maintainership of the CHRP NVRAM code in the
past), so it does not make much sense that I'm still listed here as the
maintainer.
The CHRP NVRAM code is used by the mac99 / g3beige ppc machines and
some Sparc machines, too, where Mark is the maintainer, so I asked him
whether he would be interested in being listed as the maintainer here,
and fortunately, he agreed! Thanks, Mark!
Signed-off-by: Thomas Huth <thuth@redhat.com>
Acked-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-ID: <20260305192223.6214-1-thuth@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Changes:
- [PATCH v7 0/8] Enable PC diversion via the plugin API (Florian Hofhammer <florian.hofhammer@epfl.ch>)
Link: https://lore.kernel.org/qemu-devel/20260305-setpc-v5-v7-0-4c3adba52403@epfl.ch
- [PATCH trivial] plugins: add missing callbacks to version history (Florian Hofhammer <florian.hofhammer@epfl.ch>)
Link: https://lore.kernel.org/qemu-devel/c4ecefb4-8769-403f-8420-8bce42e43e13@epfl.ch
- [PATCH 0/3] tests/tcg/plugins: Fix sanitizer issues (Peter Maydell <peter.maydell@linaro.org>)
Link: https://lore.kernel.org/qemu-devel/20260305161531.1774895-1-peter.maydell@linaro.org
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# gpg: Signature made Thu Mar 5 20:51:43 2026 GMT
# gpg: using RSA key 66B994ECA14F7F2E5ABA081F7F90540D0A1CD00F
# gpg: Good signature from "Pierrick Bouvier <pierrick.bouvier@linaro.org>" [undefined]
# 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: 66B9 94EC A14F 7F2E 5ABA 081F 7F90 540D 0A1C D00F
* tag 'pr-plugins-20260305' of https://gitlab.com/pbo-linaro/qemu:
tests/tcg/plugins/patch: Free read_data in patch_hwaddr()
tests/tcg/plugins/mem: Correct hash iteration code in plugin_exit()
tests/tcg/plugins/mem: Don't access unaligned memory
plugins: add missing callbacks to version history
tests/tcg/plugins: test register accesses
plugins: prohibit writing to read-only registers
plugins: add read-only property for registers
tests/tcg: add tests for qemu_plugin_set_pc API
plugins: add PC diversion API function
linux-user: make syscall emulation interruptible
plugins: add flag to specify whether PC is rw
plugins/core: clamp syscall arguments if target is 32-bit
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* Remove qemu-system-microblazeel (qemu-system-microblaze can be used instead)
* Improve detection of the docker/podman binary
* Prevent a null pointer dereference during zpci hot unplug
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# gpg: Signature made Mon Mar 2 12:31:00 2026 GMT
# gpg: using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg: aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg: aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg: aka "Thomas Huth <th.huth@posteo.de>" [undefined]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3 EAB9 2ED9 D774 FE70 2DB5
* tag 'pull-request-2026-03-02' of https://gitlab.com/thuth/qemu:
gitlab: ensure docker output is always displayed in CI
tests/docker: allow display of docker output
tests/docker: add support for podman remote access
tests/docker: improve handling of docker probes
Remove the qemu-system-microblazeel target from the build
gitlab-ci: Remove the microblazeel target from the CI jobs
tests/qtest: Remove the microblazeel target from the qtests
tests/functional: Remove the microblazeel test
tests/functional: Make sure test case .py files are executable
s390x/pci: prevent null pointer dereference during zpci hot unplug
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
It's been deprecated since two releases, so it should be fine to
remove this now. Users can use the qemu-system-microblaze binary
instead that can handle both endiannesses now.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20260226084608.11251-5-thuth@redhat.com>
A new functional test is added that exercises the code changes related to
closing of the old KVM VM file descriptor and opening a new one upon VM reset.
This normally happens when confidential guests are reset but for
non-confidential guests, we use a special machine specific debug/test parameter
'x-change-vmfd-on-reset' to enable this behavior.
Only specific code changes related to re-initialisation of SEV-ES, SEV-SNP and
TDX platforms are not exercised in this test as they require hardware that
supports running confidential guests.
Signed-off-by: Ani Sinha <anisinha@redhat.com>
Link: https://lore.kernel.org/r/20260225035000.385950-34-anisinha@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This change adds common kvm specific support to handle KVM VM file descriptor
change. KVM VM file descriptor can change as a part of confidential guest reset
mechanism. A new function api kvm_arch_on_vmfd_change() per
architecture platform is added in order to implement architecture specific
changes required to support it. A subsequent patch will add x86 specific
implementation for kvm_arch_on_vmfd_change() as currently only x86 supports
confidential guest reset.
Signed-off-by: Ani Sinha <anisinha@redhat.com>
Link: https://lore.kernel.org/r/20260225035000.385950-6-anisinha@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Nitro Enclaves are a confidential compute technology which
allows a parent instance to carve out resources from itself
and spawn a confidential sibling VM next to itself. Similar
to other confidential compute solutions, this sibling is
controlled by an underlying vmm, but still has a higher level
vmm (QEMU) to implement some of its I/O functionality and
lifecycle.
Add an accelerator to drive this interface. In combination with
follow-on patches to enhance the Nitro Enclaves machine model, this
will allow users to run a Nitro Enclave using QEMU.
Signed-off-by: Alexander Graf <graf@amazon.com>
Link: https://lore.kernel.org/r/20260225220807.33092-5-graf@amazon.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add a dedicated bus for Nitro Enclave vsock devices. In Nitro Enclaves,
communication between parent and enclave/hypervisor happens almost
exclusively through vsock. The nitro-vsock-bus models this dependency
in QEMU, which allows devices in this bus to implement individual services
on top of vsock.
The nitro machine spawns this bus by creating the included
nitro-vsock-bridge sysbus device.
The nitro accel then advertises the Enclave's CID to the bus by calling
nitro_vsock_bridge_start_enclave() on the bridge device as soon as it
knows the CID.
Nitro vsock devices can listen to that event and learn the Enclave's CID
when it is available to perform actions, such as connect to the debug
serial vsock port.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Alexander Graf <graf@amazon.com>
Link: https://lore.kernel.org/r/20260225220807.33092-4-graf@amazon.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Use target_info->page_bits_init to implement
migration_legacy_page_bits. Because this is the last
function within the file, rename page-vary-target.c
to page-vary-system.c and build once for system mode.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20260217095106.598486-7-richard.henderson@linaro.org>
[PMD: Update MAINTAINERS]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
