# VK_KHR_maintenance7(3) Manual Page

## Name

VK_KHR_maintenance7 - device extension

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## Registered Extension Number

563

## Revision

1

## Ratification Status

Ratified

## Extension and Version Dependencies

Vulkan Version 1.1

## Contact

- Mike Blumenkrantz [GitHub]zmike

## Extension Proposal

VK_KHR_maintenance7

## Other Extension Metadata

Last Modified Date

  2024-01-30

Interactions and External Dependencies
Contributors

  - Mike Blumenkrantz, Valve

  - Hans-Kristian Arntzen, Valve

  - Pan Gao, Huawei

  - Tobias Hector, AMD

  - Jon Leech, Khronos

  - Daniel Story, Nintendo

  - Shahbaz Youssefi, Google

  - Yiwei Zhang, Google

  - Matthew Netsch, Qualcomm

## Description

VK_KHR_maintenance7 adds a collection of minor features, none of which would warrant an entire extension of their own.

The proposed new features are as follows:

- Add a property query to determine if a framebuffer writes to depth or stencil aspect does not trigger a write access in the sibling aspect. For example, this allows sampling stencil aspect as a texture while rendering to the sibling depth attachment and vice-versa given appropriate image layouts.

- Add a way to query information regarding the underlying devices in environments where the Vulkan implementation is provided through layered implementations. For example, running on Mesa/Venus, driver ID is returned as `VK_DRIVER_ID_MESA_VENUS`, but it can be necessary to know what the real driver under the hood is. The new VkPhysicalDeviceLayeredApiPropertiesKHR structure can be used to gather information regarding layers underneath the top-level physical device.

- Promote `VK_RENDERING_CONTENTS_INLINE_BIT_EXT` and `VK_SUBPASS_CONTENTS_INLINE_AND_SECONDARY_COMMAND_BUFFERS_EXT` to KHR

- Add a limit to report the maximum total count of dynamic uniform buffers and dynamic storage buffers that can be included in a pipeline layout.

- Require that for an unsigned integer query, the 32-bit result value must be equal to the 32 least significant bits of the equivalent 64-bit result value.

- Add query for robust access support when using fragment shading rate attachments

## New Structures

- VkPhysicalDeviceLayeredApiPropertiesKHR

- Extending VkPhysicalDeviceFeatures2, VkDeviceCreateInfo:

  - VkPhysicalDeviceMaintenance7FeaturesKHR

- Extending VkPhysicalDeviceLayeredApiPropertiesKHR:

  - VkPhysicalDeviceLayeredApiVulkanPropertiesKHR

- Extending VkPhysicalDeviceProperties2:

  - VkPhysicalDeviceLayeredApiPropertiesListKHR

  - VkPhysicalDeviceMaintenance7PropertiesKHR

## New Enums

- VkPhysicalDeviceLayeredApiKHR

## New Enum Constants

- `VK_KHR_MAINTENANCE_7_EXTENSION_NAME`

- `VK_KHR_MAINTENANCE_7_SPEC_VERSION`

- Extending VkRenderingFlagBits:

  - `VK_RENDERING_CONTENTS_INLINE_BIT_KHR`

- Extending VkStructureType:

  - `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_LAYERED_API_PROPERTIES_KHR`

  - `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_LAYERED_API_PROPERTIES_LIST_KHR`

  - `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_LAYERED_API_VULKAN_PROPERTIES_KHR`

  - `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MAINTENANCE_7_FEATURES_KHR`

  - `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MAINTENANCE_7_PROPERTIES_KHR`

- Extending VkSubpassContents:

  - `VK_SUBPASS_CONTENTS_INLINE_AND_SECONDARY_COMMAND_BUFFERS_KHR`

## Issues

None.

## Version History

- Revision 1, 2024-01-30 (Jon Leech)

  - Initial revision

## 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

Copyright 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0