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; QEMU User-mode Emulation User's Guide (docs/user, [[Features/Documentation/user]]) ; QEMU System Emulation User's Guide (docs/system, [[Features/Documentation/system]])

...are needed to make reporting of block job error events robust (otherwise, block jobs just disappear and, if management misses BLOCK_JOB_COMPLETED events, i * QEMUMachine has been replaced with a QOM hierarchy, details on [[Features/QOM/Machine]].

=== Removed features and incompatible changes === ...[https://qemu-project.gitlab.io/qemu/about/removed-features.html 'Removed features'] page for details of suggested replacement functionality.

=== Removed features and incompatible changes === ...[https://qemu-project.gitlab.io/qemu/about/removed-features.html 'Removed features'] page for details of suggested replacement functionality.

* COLO Block Replication (Please refer to [http://wiki.qemu.org/Features/BlockReplication BlockReplication]) : The following is the image of block replication workflow:

* Don't allow multiwrites against a block device without underlying medium {{git|a0af597d00c27741a0bf99720209def055f4 * Various bug fixes, no new features.

=== Removed features and incompatible changes === ...[https://qemu-project.gitlab.io/qemu/about/removed-features.html 'Removed features'] page for details of suggested replacement functionality.

...[https://qemu-project.gitlab.io/qemu/about/removed-features.html 'Removed features' ] page for details of suggested replacement functionality. === New deprecated options and features ===

...the internal implementation of QMP to simplify maintainability and enable features such as asynchronous command completion and rich error reporting. Minimize # @device: This is normally the name of a block device but it may also be 'vnc'.

'''Summary:''' The [[Features/tcg-multithread|MTTCG Project]] is a project * Place TranslationBlock structures into the same memory block as code_gen_buffer

* Host floppy device pass-through (block driver "host_floppy") is deprecated, and will be dropped in a future releas * Block device parameter aio=native has no effect without cache.direct=on. It will

* [[Features/QTest|QTest]]-based tests, which inject predefined stimuli into the device * [[Testing/QemuIoTests|qemu-iotests]], a regression test suite for the block layer code.

...[https://qemu-project.gitlab.io/qemu/system/removed-features.html 'Removed features' ] page for details of suggested replacement functionality * The ''encryption_key_missing'' field has been removed from block device info data

.../master/system/deprecated.html#recently-removed-features "Recently removed features"] chapter of the QEMU System Emulation User's Guide. === New deprecated options and features ===

This page lists areas in the implementation of [[Features/Channel_I/O_Passthrough|vfio-ccw for channel I/O passthrough]] that still n == Missing architecture features ==

...e. Only x3270 is supported as client. See https://wiki.qemu.org/index.php/Features/3270 for details. ...vfio-ccw (channel device passthrough). See https://wiki.qemu.org/index.php/Features/Channel_I/O_Passthrough for details.

* Support for network boot, see http://wiki.qemu-project.org/Features/S390xNetworkBoot ==== Block devices ====

====Coroutines in the block layer [Kevin]==== * Programming model to simplify block drivers without blocking QEMU threads

=== New deprecated options and features === ...eprecated Features"] appendix for the full list of historically deprecated features/options.

** fix: https://lists.gnu.org/archive/html/qemu-block/2020-11/msg00674.html ...already registered) - not a recent regression, thus this should likely not block the release