Registered Extension Number




Extension and Version Dependencies

Deprecation state


Other Extension Metadata

Last Modified Date


IP Status

No known IP claims.

Interactions and External Dependencies
  • Jeff Bolz, NVIDIA

  • Alan Baker, Google

  • Tobias Hector, AMD

  • David Neto, Google

  • Robert Simpson, Qualcomm Technologies, Inc.

  • Brian Sumner, AMD


The VK_KHR_vulkan_memory_model extension allows use of the features guarded by the VulkanMemoryModel, VulkanMemoryModelDeviceScope, and VulkanMemoryModelAvailabilityVisibilityChains capabilities in shader modules. The Vulkan Memory Model formally defines how to synchronize memory accesses to the same memory locations performed by multiple shader invocations.


Version 3 of the spec added a member (vulkanMemoryModelAvailabilityVisibilityChains) to VkPhysicalDeviceVulkanMemoryModelFeaturesKHR, which is an incompatible change from version 2.

Promotion to Vulkan 1.2

All functionality in this extension is included in core Vulkan 1.2, with the KHR suffix omitted. However, if Vulkan 1.2 is supported and this extension is not, the vulkanMemoryModel capability is optional. The original type, enum and command names are still available as aliases of the core functionality.

New Structures

New Enum Constants



  • Extending VkStructureType:


New SPIR-V Capabilities

Version History

  • Revision 1, 2018-06-24 (Jeff Bolz)

    • Initial draft

  • Revision 3, 2018-12-10 (Jeff Bolz)

    • Add vulkanMemoryModelAvailabilityVisibilityChains member to the VkPhysicalDeviceVulkanMemoryModelFeaturesKHR structure.

See Also

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.

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