Registered Extension Number

585

Revision

1

Ratification Status

Ratified

Extension and Version Dependencies

Contact

Extension Proposal

Other Extension Metadata

Last Modified Date

2025-05-29

Interactions and External Dependencies
Contributors
  • Mike Blumenkrantz, Valve

  • Shahbaz Youssefi, Google

  • Hans-Kristian Arntzen, Valve

  • Piers Daniell, NVIDIA

  • Daniel Story, Nintendo

  • Jeff Bolz, NVIDIA

Description

VK_KHR_maintenance9 adds a collection of minor features, none of which would warrant an entire extension of their own.

The new features are as follows:

  • Support VkDevice with no queues. These can be used as effectively an offline compiler to prepopulate pipeline caches, without expensive queue creation or internal memory allocations.

  • Allow vkCmdSetEvent2 to not provide a dependency, providing vkCmdSetEvent-style usage using enums from VK_KHR_synchronization2

  • Add a VkQueryPoolCreateFlagBits::VK_QUERY_POOL_CREATE_RESET_BIT_KHR flag to create a query pool with all queries initialized to the reset state.

  • Allow any integer bit width for specific bit-wise operations.

  • Add a property to enable sparse support with VK_EXT_image_2d_view_of_3d.

  • Add a property to indicate the implementation will return (0,0,0,0) or (0,0,0,1) to vertex shaders that read unassigned attributes.

  • The effects of image memory barriers and image layout transitions on 3D images created with VK_IMAGE_CREATE_2D_ARRAY_COMPATIBLE_BIT are scoped to the slices specified by the user-provided VkImageSubresourceRange.

  • Queue family ownership transfers are no longer required for buffers and linear images, and a new physical device queue family property is exposed to indicate whether queue family ownership transfers are required for optimal images.

New Structures

New Enums

New Enum Constants

  • VK_KHR_MAINTENANCE_9_EXTENSION_NAME

  • VK_KHR_MAINTENANCE_9_SPEC_VERSION

  • Extending VkDependencyFlagBits:

    • VK_DEPENDENCY_ASYMMETRIC_EVENT_BIT_KHR

  • Extending VkQueryPoolCreateFlagBits:

    • VK_QUERY_POOL_CREATE_RESET_BIT_KHR

  • Extending VkStructureType:

    • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MAINTENANCE_9_FEATURES_KHR

    • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MAINTENANCE_9_PROPERTIES_KHR

    • VK_STRUCTURE_TYPE_QUEUE_FAMILY_OWNERSHIP_TRANSFER_PROPERTIES_KHR

Issues

None.

Version History

  • Revision 1, 2025-05-29 (Contributors)

    • Internal revisions

See Also

No cross-references are available

Document Notes

For more information, see the Vulkan Specification

This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.

Copyright 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0