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Miscellaneous patches for 2025-05-28
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This commit is contained in:
Stefan Hajnoczi
commit
a5519f27a2
3 changed files with 67 additions and 67 deletions
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@ -148,6 +148,14 @@ options are removed in favor of using explicit ``blockdev-create`` and
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``blockdev-add`` calls. See :doc:`/interop/live-block-operations` for
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details.
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``query-migrationthreads`` (since 9.2)
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''''''''''''''''''''''''''''''''''''''
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To be removed with no replacement, as it reports only a limited set of
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threads (for example, it only reports source side of multifd threads,
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without reporting any destination threads, or non-multifd source threads).
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For debugging purpose, please use ``-name $VM,debug-threads=on`` instead.
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``block-job-pause`` (since 10.1)
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''''''''''''''''''''''''''''''''
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@ -179,27 +187,10 @@ Use ``job-dismiss`` instead.
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Use ``job-finalize`` instead.
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``query-migrationthreads`` (since 9.2)
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''''''''''''''''''''''''''''''''''''''
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``migrate`` argument ``detach`` (since 10.1)
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''''''''''''''''''''''''''''''''''''''''''''
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To be removed with no replacement, as it reports only a limited set of
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threads (for example, it only reports source side of multifd threads,
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without reporting any destination threads, or non-multifd source threads).
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For debugging purpose, please use ``-name $VM,debug-threads=on`` instead.
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Incorrectly typed ``device_add`` arguments (since 6.2)
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''''''''''''''''''''''''''''''''''''''''''''''''''''''
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Due to shortcomings in the internal implementation of ``device_add``, QEMU
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incorrectly accepts certain invalid arguments: Any object or list arguments are
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silently ignored. Other argument types are not checked, but an implicit
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conversion happens, so that e.g. string values can be assigned to integer
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device properties or vice versa.
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This is a bug in QEMU that will be fixed in the future so that previously
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accepted incorrect commands will return an error. Users should make sure that
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all arguments passed to ``device_add`` are consistent with the documented
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property types.
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This argument has always been ignored.
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Host Architectures
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------------------
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@ -531,14 +522,6 @@ PCIe passthrough shall be the mainline solution.
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CPU device properties
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'''''''''''''''''''''
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``pcommit`` on x86 (since 9.1)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The PCOMMIT instruction was never included in any physical processor.
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It was implemented as a no-op instruction in TCG up to QEMU 9.0, but
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only with ``-cpu max`` (which does not guarantee migration compatibility
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across versions).
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``pmu-num=n`` on RISC-V CPUs (since 8.2)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -548,6 +531,14 @@ be calculated with ``((2 ^ n) - 1) << 3``. The least significant three bits
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must be left clear.
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``pcommit`` on x86 (since 9.1)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The PCOMMIT instruction was never included in any physical processor.
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It was implemented as a no-op instruction in TCG up to QEMU 9.0, but
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only with ``-cpu max`` (which does not guarantee migration compatibility
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across versions).
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Backwards compatibility
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-----------------------
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@ -162,6 +162,12 @@ specified with ``-mem-path`` can actually provide the guest RAM configured with
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The ``name`` parameter of the ``-net`` option was a synonym
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for the ``id`` parameter, which should now be used instead.
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RISC-V firmware not booted by default (removed in 5.1)
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''''''''''''''''''''''''''''''''''''''''''''''''''''''
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QEMU 5.1 changes the default behaviour from ``-bios none`` to ``-bios default``
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for the RISC-V ``virt`` machine and ``sifive_u`` machine.
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``-numa node,mem=...`` (removed in 5.1)
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'''''''''''''''''''''''''''''''''''''''
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@ -324,12 +330,6 @@ devices. Drives the board doesn't pick up can no longer be used with
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This option was undocumented and not used in the field.
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Use ``-device usb-ccid`` instead.
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RISC-V firmware not booted by default (removed in 5.1)
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''''''''''''''''''''''''''''''''''''''''''''''''''''''
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QEMU 5.1 changes the default behaviour from ``-bios none`` to ``-bios default``
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for the RISC-V ``virt`` machine and ``sifive_u`` machine.
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``-no-quit`` (removed in 7.0)
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'''''''''''''''''''''''''''''
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@ -722,6 +722,15 @@ Use ``multifd-channels`` instead.
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Use ``multifd-compression`` instead.
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Incorrectly typed ``device_add`` arguments (since 9.2)
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''''''''''''''''''''''''''''''''''''''''''''''''''''''
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Due to shortcomings in the internal implementation of ``device_add``,
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QEMU used to incorrectly accept certain invalid arguments. Any object
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or list arguments were silently ignored. Other argument types were not
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checked, but an implicit conversion happened, so that e.g. string
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values could be assigned to integer device properties or vice versa.
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QEMU Machine Protocol (QMP) events
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----------------------------------
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@ -902,14 +911,6 @@ The RISC-V no MMU cpus have been removed. The two CPUs: ``rv32imacu-nommu`` and
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``rv64imacu-nommu`` can no longer be used. Instead the MMU status can be specified
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via the CPU ``mmu`` option when using the ``rv32`` or ``rv64`` CPUs.
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RISC-V 'any' CPU type ``-cpu any`` (removed in 9.2)
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'''''''''''''''''''''''''''''''''''''''''''''''''''
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The 'any' CPU type was introduced back in 2018 and was around since the
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initial RISC-V QEMU port. Its usage was always been unclear: users don't know
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what to expect from a CPU called 'any', and in fact the CPU does not do anything
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special that isn't already done by the default CPUs rv32/rv64.
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``compat`` property of server class POWER CPUs (removed in 6.0)
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'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
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@ -956,6 +957,14 @@ The CRIS architecture was pulled from Linux in 4.17 and the compiler
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was no longer packaged in any distro making it harder to run the
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``check-tcg`` tests.
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RISC-V 'any' CPU type ``-cpu any`` (removed in 9.2)
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'''''''''''''''''''''''''''''''''''''''''''''''''''
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The 'any' CPU type was introduced back in 2018 and was around since the
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initial RISC-V QEMU port. Its usage was always been unclear: users don't know
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what to expect from a CPU called 'any', and in fact the CPU does not do anything
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special that isn't already done by the default CPUs rv32/rv64.
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System accelerators
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-------------------
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@ -966,18 +975,18 @@ Userspace local APIC with KVM (x86, removed in 8.0)
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a local APIC. The ``split`` setting is supported, as is using ``-M
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kernel-irqchip=off`` when the CPU does not have a local APIC.
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HAXM (``-accel hax``) (removed in 8.2)
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''''''''''''''''''''''''''''''''''''''
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The HAXM project has been retired (see https://github.com/intel/haxm#status).
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Use "whpx" (on Windows) or "hvf" (on macOS) instead.
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MIPS "Trap-and-Emulate" KVM support (removed in 8.0)
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''''''''''''''''''''''''''''''''''''''''''''''''''''
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The MIPS "Trap-and-Emulate" KVM host and guest support was removed
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from Linux in 2021, and is not supported anymore by QEMU either.
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HAXM (``-accel hax``) (removed in 8.2)
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''''''''''''''''''''''''''''''''''''''
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The HAXM project has been retired (see https://github.com/intel/haxm#status).
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Use "whpx" (on Windows) or "hvf" (on macOS) instead.
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System emulator machines
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------------------------
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@ -1035,16 +1044,6 @@ Aspeed ``swift-bmc`` machine (removed in 7.0)
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This machine was removed because it was unused. Alternative AST2500 based
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OpenPOWER machines are ``witherspoon-bmc`` and ``romulus-bmc``.
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Aspeed ``tacoma-bmc`` machine (removed in 10.0)
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'''''''''''''''''''''''''''''''''''''''''''''''
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The ``tacoma-bmc`` machine was removed because it didn't bring much
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compared to the ``rainier-bmc`` machine. Also, the ``tacoma-bmc`` was
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a board used for bring up of the AST2600 SoC that never left the
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labs. It can be easily replaced by the ``rainier-bmc`` machine, which
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was the actual final product, or by the ``ast2600-evb`` with some
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tweaks.
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ppc ``taihu`` machine (removed in 7.2)
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'''''''''''''''''''''''''''''''''''''''''''''
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@ -1075,6 +1074,16 @@ for all machine types using the PXA2xx and OMAP2 SoCs. We are also
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dropping the ``cheetah`` OMAP1 board, because we don't have any
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test images for it and don't know of anybody who does.
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Aspeed ``tacoma-bmc`` machine (removed in 10.0)
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'''''''''''''''''''''''''''''''''''''''''''''''
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The ``tacoma-bmc`` machine was removed because it didn't bring much
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compared to the ``rainier-bmc`` machine. Also, the ``tacoma-bmc`` was
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a board used for bring up of the AST2600 SoC that never left the
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labs. It can be easily replaced by the ``rainier-bmc`` machine, which
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was the actual final product, or by the ``ast2600-evb`` with some
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tweaks.
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ppc ``ref405ep`` machine (removed in 10.0)
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''''''''''''''''''''''''''''''''''''''''''
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@ -1660,6 +1660,10 @@
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#
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# @resume: resume one paused migration, default "off". (since 3.0)
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#
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# Features:
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#
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# @deprecated: Argument @detach is deprecated.
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#
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# Since: 0.14
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#
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# .. admonition:: Notes
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@ -1668,19 +1672,14 @@
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# migration's progress and final result (this information is
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# provided by the 'status' member).
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#
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# 2. All boolean arguments default to false.
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#
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# 3. The user Monitor's "detach" argument is invalid in QMP and
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# should not be used.
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#
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# 4. The uri argument should have the Uniform Resource Identifier
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# 2. The uri argument should have the Uniform Resource Identifier
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# of default destination VM. This connection will be bound to
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# default network.
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#
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# 5. For now, number of migration streams is restricted to one,
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# 3. For now, number of migration streams is restricted to one,
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# i.e. number of items in 'channels' list is just 1.
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#
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# 6. The 'uri' and 'channels' arguments are mutually exclusive;
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# 4. The 'uri' and 'channels' arguments are mutually exclusive;
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# exactly one of the two should be present.
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#
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# .. qmp-example::
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@ -1724,7 +1723,8 @@
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{ 'command': 'migrate',
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'data': {'*uri': 'str',
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'*channels': [ 'MigrationChannel' ],
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'*detach': 'bool', '*resume': 'bool' } }
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'*detach': { 'type': 'bool', 'features': [ 'deprecated' ] },
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'*resume': 'bool' } }
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##
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# @migrate-incoming:
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