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Release of libvirt-11.8.0
by Jiri Denemark 01 Oct '25

01 Oct '25

The 11.8.0 release of both libvirt and libvirt-python is tagged and signed tarballs are available at https://download.libvirt.org/ https://download.libvirt.org/python/ Thanks everybody who helped with this release by sending patches, reviewing, testing, or providing feedback. Your work is greatly appreciated. * New features * ch: Disk hotplug Support Users can now attach and detach disks of Cloud Hypervisor domains at runtime. * qemu: Add support for NUMA affinity of PCI devices To support NVIDIA Multi-Instance GPU (MIG) configurations, libvirt now handles QEMU's acpi-generic-initiator device internally. MIG enables partitioning a physical GPU into multiple isolated instances, each associated with one or more virtual NUMA nodes. On the XML side, the existing ``<acpi>`` element has been extended with a ``nodeset`` attribute to specify the NUMA node affinity of a PCI device. * Improvements * ch: Events emitting The CH driver not only emits more domain lifecycle events but also implements ``virConnectDomainEventRegister()`` and ``virConnectDomainEventDeregister()`` APIs for management applications to listen on those events. * Bug fixes * qemu: Fix selection of stateless/combined firmware A stateless firmware will now be correctly chosen when appropriate, e.g. for domains configured to use SEV-SNP. * ch: Make sure the cloud-hypervisor process is killed in ``virCHProcessStop()`` Due to wrong assumptions in the CH driver, calling ``virDomainDestroy()`` did not kill the corresponding cloud-hypervisor process. Domains can be now destroyed reliably. Enjoy. Jirka

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[PULL 00/23] Rust ci patches
by marcandre.lureau＠redhat.com 30 Sep '25

30 Sep '25

From: Marc-André Lureau <marcandre.lureau(a)redhat.com> The following changes since commit 85a3fd1c4cb3ba7a9eb291c1e222f935e922d1f7: Merge tag 'pull-aspeed-20250929' of https://github.com/legoater/qemu into staging (2025-09-29 10:52:48 -0700) are available in the Git repository at: https://gitlab.com/marcandre.lureau/qemu.git tags/rust-ci-pull-request for you to fetch changes up to 582a39beea414c092dbd8c178f3eff3a718eee77: build-sys: pass -fvisibility=default for wasm bindgen (2025-09-30 19:33:25 +0400) ---------------------------------------------------------------- CI/build-sys fixes for Rust Collect CI/build-sys patches related to Rust. ---------------------------------------------------------------- Marc-André Lureau (23): build-sys: require -lrt when no shm_open() in std libs gitlab-ci: fix 'needs' property type must be array scripts/archive-source: speed up downloading subprojects scripts/archive-source: silence subprojects downloads scripts/archive-source: use a bash array configure: fix rust meson configuration configure: set the bindgen cross target tests/docker/common: print errors to stderr tests/docker: use fully qualified image name for emsdk tests/docker/common: print meson log on configure failure build-sys: cfi_debug and safe_stack are not compatible lcitool: update, switch to f41 lcitool/qemu: include libclang-rt for TSAN lcitool/alpine: workaround bindgen issue tests/lcitool: add missing rust-std dep tests/lcitool: update to debian13 tests/docker: add ENABLE_RUST environment tests/lcitool: enable rust & refresh configure: set the meson executable suffix/ext tests/freebsd: enable Rust meson: rust-bindgen limit allowlist-file to srcdir/include build-sys: deprecate mips host build-sys: pass -fvisibility=default for wasm bindgen docs/about/build-platforms.rst | 2 - docs/about/deprecated.rst | 9 +- configure | 23 +++- meson.build | 34 +++-- .gitlab-ci.d/buildtest.yml | 62 +++++----- .gitlab-ci.d/cirrus.yml | 2 +- .gitlab-ci.d/crossbuilds.yml | 46 +++---- .gitlab-ci.d/static_checks.yml | 6 +- rust/bql/meson.build | 1 + rust/chardev/meson.build | 1 + rust/hw/char/pl011/meson.build | 1 + rust/hw/core/meson.build | 1 + rust/migration/meson.build | 3 +- rust/qom/meson.build | 1 + rust/system/meson.build | 1 + rust/util/meson.build | 1 + scripts/archive-source.sh | 34 +++-- .../ci/setup/ubuntu/ubuntu-2204-aarch64.yaml | 5 +- .../ci/setup/ubuntu/ubuntu-2204-s390x.yaml | 5 +- scripts/rust-to-clang-target-test.sh | 43 +++++++ scripts/rust-to-clang-target.sh | 60 +++++++++ tests/docker/common.rc | 13 +- tests/docker/dockerfiles/alpine.docker | 6 +- tests/docker/dockerfiles/centos9.docker | 4 + .../dockerfiles/debian-amd64-cross.docker | 18 ++- .../dockerfiles/debian-arm64-cross.docker | 18 ++- .../dockerfiles/debian-armhf-cross.docker | 21 ++-- .../dockerfiles/debian-i686-cross.docker | 20 +-- .../dockerfiles/debian-mips64el-cross.docker | 9 +- .../dockerfiles/debian-mipsel-cross.docker | 9 +- .../dockerfiles/debian-ppc64el-cross.docker | 18 ++- .../dockerfiles/debian-riscv64-cross.docker | 116 +++++++++++++++++- .../dockerfiles/debian-s390x-cross.docker | 18 ++- tests/docker/dockerfiles/debian.docker | 18 ++- .../dockerfiles/emsdk-wasm32-cross.docker | 2 +- .../dockerfiles/fedora-rust-nightly.docker | 18 ++- .../dockerfiles/fedora-win64-cross.docker | 15 ++- tests/docker/dockerfiles/fedora.docker | 18 ++- tests/docker/dockerfiles/opensuse-leap.docker | 7 +- tests/docker/dockerfiles/ubuntu2204.docker | 7 +- tests/lcitool/libvirt-ci | 2 +- tests/lcitool/projects/qemu.yml | 3 +- tests/lcitool/refresh | 49 +++++--- tests/vm/freebsd | 4 +- 44 files changed, 574 insertions(+), 180 deletions(-) create mode 100755 scripts/rust-to-clang-target-test.sh create mode 100644 scripts/rust-to-clang-target.sh -- 2.51.0

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[PATCH] libvirt-secret: handle empty value in virSecretSetValue()
by gerben＠altlinux.org 29 Sep '25

29 Sep '25

From: Denis Rastyogin <gerben(a)altlinux.org> virSecretSetValue() previously checked for NULL `value`, but did not handle the case where `value_size` is 0. This could lead to `new_value = g_new0(unsigned char, value_size)` returning NULL and subsequent `memcpy(new_value, value, value_size)` dereferencing a NULL pointer. Adding a check prevents this possible issue. Found by Linux Verification Center (linuxtesting.org) with SVACE. Reported-by: Vadim Urtaev <v.urtaev(a)fobos-nt.ru> Signed-off-by: Denis Rastyogin <gerben(a)altlinux.org> --- src/libvirt-secret.c | 1 + 1 file changed, 1 insertion(+) diff --git a/src/libvirt-secret.c b/src/libvirt-secret.c index 4d0c88745d..e4391d1841 100644 --- a/src/libvirt-secret.c +++ b/src/libvirt-secret.c @@ -569,6 +569,7 @@ virSecretSetValue(virSecretPtr secret, const unsigned char *value, virCheckReadOnlyGoto(conn->flags, error); virCheckNonNullArgGoto(value, error); + virCheckNonZeroArgGoto(value_size, error); if (conn->secretDriver != NULL && conn->secretDriver->secretSetValue != NULL) { int ret; -- 2.42.2

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Entering freeze for libvirt-11.8.0
by Jiri Denemark 29 Sep '25

29 Sep '25

I have just tagged v11.8.0-rc1 in the repository and pushed signed tarballs to https://download.libvirt.org/ Please give the release candidate some testing and in case you find a serious issue which should have a fix in the upcoming release, feel free to reply to this thread to make sure the issue is more visible. If you have not done so yet, please update NEWS.rst to document any significant change you made since the last release. Jirka

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[PATCH] NEWS: Fix format of XML elements/attributes in v11.8.0 section
by Michal Privoznik 29 Sep '25

29 Sep '25

From: Michal Privoznik <mprivozn(a)redhat.com> It's a good practice to use a different style of formatting for literal values like XML element/attribute names, functions, etc. In this specific case, the 'acpi' and 'nodeset' names should be formatted using two single quotes instead of double quote. Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com> --- NEWS.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/NEWS.rst b/NEWS.rst index d49e8f75c4..7fd9e92d4e 100644 --- a/NEWS.rst +++ b/NEWS.rst @@ -29,8 +29,8 @@ v11.8.0 (unreleased) partitioning a physical GPU into multiple isolated instances, each associated with one or more virtual NUMA nodes. - On the XML side, the existing <acpi> element has been extended with a - "nodeset" attribute to specify the NUMA node affinity of a PCI device. + On the XML side, the existing ``<acpi>`` element has been extended with a + ``nodeset`` attribute to specify the NUMA node affinity of a PCI device. * **Improvements** -- 2.49.1

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[PATCH] NEWS: Document features/improvements/bug fixes I've participated in
by Michal Privoznik 29 Sep '25

29 Sep '25

From: Michal Privoznik <mprivozn(a)redhat.com> There are some features/improvements/bug fixes I've either contributed or reviewed/merged. Document them for upcoming release. Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com> --- NEWS.rst | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/NEWS.rst b/NEWS.rst index 847dcb390b..d49e8f75c4 100644 --- a/NEWS.rst +++ b/NEWS.rst @@ -34,6 +34,13 @@ v11.8.0 (unreleased) * **Improvements** + * ch: Events emitting + + The CH driver not only emits more domain lifecycle events but also + implements ``virConnectDomainEventRegister()`` and + ``virConnectDomainEventDeregister()`` APIs for management applications to + listen on those events. + * **Bug fixes** * qemu: Fix selection of stateless/combined firmware @@ -41,6 +48,12 @@ v11.8.0 (unreleased) A stateless firmware will now be correctly chosen when appropriate, e.g. for domains configured to use SEV-SNP. + * ch: Make sure the cloud-hypervisor process is killed in ``virCHProcessStop()`` + + Due to wrong assumptions in the CH driver, calling ``virDomainDestroy()`` + did not kill the corresponding cloud-hypervisor process. Domains can be now + destroyed reliably. + v11.7.0 (2025-09-01) ==================== -- 2.49.1

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[PATCH] conf.c: use hwuuid for guest ABI stability check if present
by Mark Cave-Ayland 29 Sep '25

29 Sep '25

With the introduction of the hwuuid element it is possible to pass a separate hardware UUID from the domain UUID for use by the guest. In the case where the hwuuid element is present, it is the hardware UUID that is visible to the guest and not the domain UUID so adjust the check in virDomainDefCheckABIStabilityFlags() accordingly. Signed-off-by: Mark Cave-Ayland <mark.caveayland(a)nutanix.com> --- src/conf/domain_conf.c | 31 ++++++++++++++++++++++--------- 1 file changed, 22 insertions(+), 9 deletions(-) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 281846dfbe..de0181f62b 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -22226,15 +22226,28 @@ virDomainDefCheckABIStabilityFlags(virDomainDef *src, goto error; } - if (memcmp(src->uuid, dst->uuid, VIR_UUID_BUFLEN) != 0) { - char uuidsrc[VIR_UUID_STRING_BUFLEN]; - char uuiddst[VIR_UUID_STRING_BUFLEN]; - virUUIDFormat(src->uuid, uuidsrc); - virUUIDFormat(dst->uuid, uuiddst); - virReportError(VIR_ERR_CONFIG_UNSUPPORTED, - _("Target domain uuid %1$s does not match source %2$s"), - uuiddst, uuidsrc); - goto error; + if (virUUIDIsValid(src->hw_uuid) && virUUIDIsValid(dst->hw_uuid)) { + if (memcmp(src->hw_uuid, dst->hw_uuid, VIR_UUID_BUFLEN) != 0) { + char uuidsrc[VIR_UUID_STRING_BUFLEN]; + char uuiddst[VIR_UUID_STRING_BUFLEN]; + virUUIDFormat(src->hw_uuid, uuidsrc); + virUUIDFormat(dst->hw_uuid, uuiddst); + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("Target domain hwuuid %1$s does not match source %2$s"), + uuiddst, uuidsrc); + goto error; + } + } else { + if (memcmp(src->uuid, dst->uuid, VIR_UUID_BUFLEN) != 0) { + char uuidsrc[VIR_UUID_STRING_BUFLEN]; + char uuiddst[VIR_UUID_STRING_BUFLEN]; + virUUIDFormat(src->uuid, uuidsrc); + virUUIDFormat(dst->uuid, uuiddst); + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("Target domain uuid %1$s does not match source %2$s"), + uuiddst, uuidsrc); + goto error; + } } if (src->genidRequested != dst->genidRequested) { -- 2.43.0

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[PATCH] bhyve: hooks: improve process start error handling
by Roman Bogorodskiy 26 Sep '25

26 Sep '25

When the virBhyveProcessStart() fails early, make sure to execute the "stopped" and "release" hooks. Spotted while running TCK hooks tests against the bhyve driver. Signed-off-by: Roman Bogorodskiy <bogorodskiy(a)gmail.com> --- src/bhyve/bhyve_process.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/src/bhyve/bhyve_process.c b/src/bhyve/bhyve_process.c index 4bfd511bae..4fb7e642e1 100644 --- a/src/bhyve/bhyve_process.c +++ b/src/bhyve/bhyve_process.c @@ -413,18 +413,24 @@ virBhyveProcessStart(bhyveConn *driver, { /* Run an early hook to setup missing devices. */ if (bhyveProcessStartHook(driver, vm, VIR_HOOK_BHYVE_OP_PREPARE) < 0) - return -1; + goto cleanup; if (flags & VIR_BHYVE_PROCESS_START_AUTODESTROY) virCloseCallbacksDomainAdd(vm, conn, bhyveProcessAutoDestroy); if (bhyveProcessPrepareDomain(driver, vm, flags) < 0) - return -1; + goto cleanup; if (bhyveProcessPrepareHost(driver, vm->def, flags) < 0) - return -1; + goto cleanup; return virBhyveProcessStartImpl(driver, vm, reason); + + cleanup: + bhyveProcessStopHook(driver, vm, VIR_HOOK_BHYVE_OP_STOPPED); + bhyveProcessStopHook(driver, vm, VIR_HOOK_BHYVE_OP_RELEASE); + + return -1; } static void -- 2.51.0

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[PATCH v4 0/3] Introduce virDomainBlockRebaseParams API
by Nikolai Barybin 26 Sep '25

26 Sep '25

Changes since last revision: - Removed mention of hypervisor-specific details from API docs - Refactored qemu driver implementation in the way that older API calls new one - Added virsh command Nikolai Barybin (3): api: remote: introduce virDomainBlockRebaseParams API qemu: implement driver support for domainBlockRebaseParams API tools: virsh: introduce blockrebase-params cmd docs/manpages/virsh.rst | 39 ++++ include/libvirt/libvirt-domain.h | 34 ++++ src/driver-hypervisor.h | 8 + src/libvirt-domain.c | 63 ++++++ src/libvirt_public.syms | 5 + src/qemu/qemu_driver.c | 327 +++++++++++++++++++------------ src/remote/remote_driver.c | 1 + src/remote/remote_protocol.x | 17 +- src/remote_protocol-structs | 10 + tools/virsh-domain.c | 160 +++++++++++++++ tools/vsh.c | 14 ++ tools/vsh.h | 2 + 12 files changed, 557 insertions(+), 123 deletions(-) -- 2.43.5

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[PATCH v4 00/23] util: sync error_report & qemu_log output more closely
by Daniel P. Berrangé 25 Sep '25

25 Sep '25

This series is a tangent that came out of discussion in https://lists.nongnu.org/archive/html/qemu-devel/2025-08/msg00903.html In thinking about adding thread info to error_report, I came to realize we should likely make qemu_log behave consistently with error_report & friends. We already honour '-msg timestamp=on', but don't honour 'guest-name=on' and also don't include the binary name. As an example of the current state, consider mixing error and log output today: - Default context: # qemu-system-x86_64 -object tls-creds-x509,id=t0,dir=fish \ -d 'trace:qcrypto*' qcrypto_tls_creds_x509_load TLS creds x509 load creds=0x55ac6d97f700 dir=fish qcrypto_tls_creds_get_path TLS creds path creds=0x55ac6d97f700 filename=ca-cert.pem path=<none> qemu-system-x86_64: Unable to access credentials fish/ca-cert.pem: No such file or directory - Full context: # qemu-system-x86_64 -object tls-creds-x509,id=t0,dir=fish \ -d 'trace:qcrypto*' \ -msg guest-name=on,timestamp=on \ -name "fish food" 2025-08-19T20:14:16.791413Z qcrypto_tls_creds_x509_load TLS creds x509 load creds=0x55e9a3458d10 dir=fish 2025-08-19T20:14:16.791429Z qcrypto_tls_creds_get_path TLS creds path creds=0x55e9a3458d10 filename=ca-cert.pem path=<none> 2025-08-19T20:14:16.791433Z fish food qemu-system-x86_64: Unable to access credentials fish/ca-cert.pem: No such file or directory And after this series is complete: - Default context: # qemu-system-x86_64 -object tls-creds-x509,id=t0,dir=fish \ -d 'trace:qcrypto*' qemu-system-x86_64(1184284:main): qcrypto_tls_creds_x509_load TLS creds x509 load creds=0x55a24ad5cb30 dir=fish qemu-system-x86_64(1184284:main): qcrypto_tls_creds_get_path TLS creds path creds=0x55a24ad5cb30 filename=ca-cert.pem path=<none> qemu-system-x86_64(1184284:main): Unable to access credentials fish/ca-cert.pem: No such file or directory - Full context: # qemu-system-x86_64 -object tls-creds-x509,id=t0,dir=fish \ -d 'trace:qcrypto*' \ -msg guest-name=on,timestamp=on \ -name "fish food" 2025-08-19T20:12:50.211823Z [fish food] qemu-system-x86_64(1168876:main): qcrypto_tls_creds_x509_load TLS creds x509 load creds=0x5582183d8760 dir=fish 2025-08-19T20:12:50.211842Z [fish food] qemu-system-x86_64(1168876:main): qcrypto_tls_creds_get_path TLS creds path creds=0x5582183d8760 filename=ca-cert.pem +path=<none> 2025-08-19T20:12:50.211846Z [fish food] qemu-system-x86_64(1168876:main): Unable to access credentials fish/ca-cert.pem: No such file or directory The main things to note: * error_report/warn_report/qemu_log share the same output format and -msg applies to both * -msg debug-threads=on is now unconditionally enabled and thus the param is deprecated & ignored * Thread ID and name are unconditionally enabled * Guest name is surrounded in [...] brackets * The default output lines are typically 15 chars wider given that we always include the thread ID + name now * This takes the liberty of assigning the new file to the existing error-report.c maintainer (Markus) Since splitting it off into message.c instead of putting it all in error-report.c felt slightly nicer. One thing I didn't tackle is making the location info get reported for qemu_log. This is used to give context for error messages when parsing some CLI args, and could be interesting for log messages associated with those same CLI args. Changes in v4: - Re-architected the way error_vprintf() operates to simplify monitor dependency - Fixed the move of error_vprintf from monitor.c to error-report.c so that unit tests can still get a stub to capture messages to g_test_message - Simplify changes to vreport() to avoid passing around function pointers - Add locking of stderr to vreport() to serialize incremental output - Fix thread naming logic changes on Windows - Change deprecation warning messages Changes in v3: - Stop formatting a string in qmessage_context, instead output directly to a "FILE *" stream - Fix pre-existing bug interleaving qemu_log and vreport when the trace 'log' backend has mutex probes enabled Changes in v2: - Re-use existing qemu_get_thread_id rather than re-inventing it as qemu_thread_get_id. - Expose qemu_thread_set_name and use it from all locations needing to set thread names - Fix qemu_log() to skip context prefix when emitting a log message in fragments across multiple calls - Skip allocating memory for empty context messages - Fix leak in win32 impl of qemu_thread_get_name - Use g_strlcpy where possible Daniel P. Berrangé (23): include: define constant for early constructor priority monitor: initialize global data from a constructor system: unconditionally enable thread naming util: expose qemu_thread_set_name audio: make jackaudio use qemu_thread_set_name util: set the name for the 'main' thread util: add API to fetch the current thread name log: avoid repeated prefix on incremental qemu_log calls util: introduce some API docs for logging APIs ui/vnc: remove use of error_printf_unless_qmp() monitor: remove redundant error_[v]printf_unless_qmp monitor: refactor error_vprintf() monitor: move error_vprintf back to error-report.c monitor: introduce monitor_cur_is_hmp() helper util: don't skip error prefixes when QMP is active util: fix interleaving of error & trace output util: fix interleaving of error prefixes util: introduce common helper for error-report & log code util: convert error-report & log to message API for timestamp util: add support for formatting a workload name in messages util: add support for formatting a program name in messages util: add support for formatting thread info in messages util: add brackets around guest name in message context MAINTAINERS | 2 + audio/jackaudio.c | 30 +++++++-- docs/about/deprecated.rst | 7 ++ include/monitor/monitor.h | 4 +- include/qemu/compiler.h | 8 +++ include/qemu/error-report.h | 4 -- include/qemu/log-for-trace.h | 35 +++++++++- include/qemu/log.h | 26 ++++++++ include/qemu/message.h | 40 ++++++++++++ include/qemu/thread.h | 3 +- meson.build | 21 ++++++ monitor/monitor.c | 61 ++++++----------- rust/util/src/log.rs | 7 ++ storage-daemon/qemu-storage-daemon.c | 6 ++ stubs/error-printf.c | 23 ------- stubs/meson.build | 1 - stubs/monitor-core.c | 20 +++++- system/vl.c | 31 ++++++--- tests/qemu-iotests/041 | 2 +- tests/qemu-iotests/common.filter | 2 +- tests/unit/test-error-report.c | 6 +- tests/unit/test-util-sockets.c | 1 + ui/vnc.c | 14 ++-- util/error-report.c | 97 +++++++++++++++++----------- util/log.c | 28 ++++---- util/meson.build | 1 + util/message.c | 47 ++++++++++++++ util/qemu-thread-posix.c | 77 +++++++++++++++------- util/qemu-thread-win32.c | 87 +++++++++++++++++-------- 29 files changed, 485 insertions(+), 206 deletions(-) create mode 100644 include/qemu/message.h delete mode 100644 stubs/error-printf.c create mode 100644 util/message.c -- 2.50.1

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