1// Copyright 2018-2022 The Khronos Group Inc. 2// 3// SPDX-License-Identifier: CC-BY-4.0 4 5[open,refpage='VkValidationFeaturesEXT',desc='Specify validation features to enable or disable for a Vulkan instance',type='structs'] 6-- 7When creating a Vulkan instance for which you wish to enable or disable 8specific validation features, add a slink:VkValidationFeaturesEXT structure 9to the pname:pNext chain of the slink:VkInstanceCreateInfo structure, 10specifying the features to be enabled or disabled. 11 12include::{generated}/api/structs/VkValidationFeaturesEXT.adoc[] 13 14 * pname:sType is the type of this structure. 15 * pname:pNext is `NULL` or a pointer to a structure extending this 16 structure. 17 * pname:enabledValidationFeatureCount is the number of features to enable. 18 * pname:pEnabledValidationFeatures is a pointer to an array of 19 elink:VkValidationFeatureEnableEXT values specifying the validation 20 features to be enabled. 21 * pname:disabledValidationFeatureCount is the number of features to 22 disable. 23 * pname:pDisabledValidationFeatures is a pointer to an array of 24 elink:VkValidationFeatureDisableEXT values specifying the validation 25 features to be disabled. 26 27.Valid Usage 28**** 29 * [[VUID-VkValidationFeaturesEXT-pEnabledValidationFeatures-02967]] 30 If the pname:pEnabledValidationFeatures array contains 31 ename:VK_VALIDATION_FEATURE_ENABLE_GPU_ASSISTED_RESERVE_BINDING_SLOT_EXT, 32 then it must: also contain 33 ename:VK_VALIDATION_FEATURE_ENABLE_GPU_ASSISTED_EXT 34 * [[VUID-VkValidationFeaturesEXT-pEnabledValidationFeatures-02968]] 35 If the pname:pEnabledValidationFeatures array contains 36 ename:VK_VALIDATION_FEATURE_ENABLE_DEBUG_PRINTF_EXT, then it must: not 37 contain ename:VK_VALIDATION_FEATURE_ENABLE_GPU_ASSISTED_EXT 38**** 39 40include::{generated}/validity/structs/VkValidationFeaturesEXT.adoc[] 41-- 42 43[open,refpage='VkValidationFeatureEnableEXT',desc='Specify validation features to enable',type='enums'] 44-- 45Possible values of elements of the 46slink:VkValidationFeaturesEXT::pname:pEnabledValidationFeatures array, 47specifying validation features to be enabled, are: 48 49include::{generated}/api/enums/VkValidationFeatureEnableEXT.adoc[] 50 51 * ename:VK_VALIDATION_FEATURE_ENABLE_GPU_ASSISTED_EXT specifies that 52 GPU-assisted validation is enabled. 53 Activating this feature instruments shader programs to generate 54 additional diagnostic data. 55 This feature is disabled by default. 56 * ename:VK_VALIDATION_FEATURE_ENABLE_GPU_ASSISTED_RESERVE_BINDING_SLOT_EXT 57 specifies that the validation layers reserve a descriptor set binding 58 slot for their own use. 59 The layer reports a value for 60 slink:VkPhysicalDeviceLimits::pname:maxBoundDescriptorSets that is one 61 less than the value reported by the device. 62 If the device supports the binding of only one descriptor set, the 63 validation layer does not perform GPU-assisted validation. 64 This feature is disabled by default. 65 * ename:VK_VALIDATION_FEATURE_ENABLE_BEST_PRACTICES_EXT specifies that 66 Vulkan best-practices validation is enabled. 67 Activating this feature enables the output of warnings related to common 68 misuse of the API, but which are not explicitly prohibited by the 69 specification. 70 This feature is disabled by default. 71 * ename:VK_VALIDATION_FEATURE_ENABLE_DEBUG_PRINTF_EXT specifies that the 72 layers will process code:debugPrintfEXT operations in shaders and send 73 the resulting output to the debug callback. 74 This feature is disabled by default. 75 * ename:VK_VALIDATION_FEATURE_ENABLE_SYNCHRONIZATION_VALIDATION_EXT 76 specifies that Vulkan synchronization validation is enabled. 77 This feature reports resource access conflicts due to missing or 78 incorrect synchronization operations between actions (Draw, Copy, 79 Dispatch, Blit) reading or writing the same regions of memory. 80 This feature is disabled by default. 81-- 82 83[open,refpage='VkValidationFeatureDisableEXT',desc='Specify validation features to disable',type='enums'] 84-- 85Possible values of elements of the 86slink:VkValidationFeaturesEXT::pname:pDisabledValidationFeatures array, 87specifying validation features to be disabled, are: 88 89include::{generated}/api/enums/VkValidationFeatureDisableEXT.adoc[] 90 91 * ename:VK_VALIDATION_FEATURE_DISABLE_ALL_EXT specifies that all 92 validation checks are disabled. 93 * ename:VK_VALIDATION_FEATURE_DISABLE_SHADERS_EXT specifies that shader 94 validation is disabled. 95 This feature is enabled by default. 96 * ename:VK_VALIDATION_FEATURE_DISABLE_THREAD_SAFETY_EXT specifies that 97 thread safety validation is disabled. 98 This feature is enabled by default. 99 * ename:VK_VALIDATION_FEATURE_DISABLE_API_PARAMETERS_EXT specifies that 100 stateless parameter validation is disabled. 101 This feature is enabled by default. 102 * ename:VK_VALIDATION_FEATURE_DISABLE_OBJECT_LIFETIMES_EXT specifies that 103 object lifetime validation is disabled. 104 This feature is enabled by default. 105 * ename:VK_VALIDATION_FEATURE_DISABLE_CORE_CHECKS_EXT specifies that core 106 validation checks are disabled. 107 This feature is enabled by default. 108 If this feature is disabled, the shader validation and GPU-assisted 109 validation features are also disabled. 110 * ename:VK_VALIDATION_FEATURE_DISABLE_UNIQUE_HANDLES_EXT specifies that 111 protection against duplicate non-dispatchable object handles is 112 disabled. 113 This feature is enabled by default. 114 * ename:VK_VALIDATION_FEATURE_DISABLE_SHADER_VALIDATION_CACHE_EXT 115 specifies that there will be no caching of shader validation results and 116 every shader will be validated on every application execution. 117 Shader validation caching is enabled by default. 118-- 119 120[NOTE] 121.Note 122==== 123Disabling checks such as parameter validation and object lifetime validation 124prevents the reporting of error conditions that can cause other validation 125checks to behave incorrectly or crash. 126Some validation checks assume that their inputs are already valid and do not 127always revalidate them. 128==== 129 130[NOTE] 131.Note 132==== 133The `apiext:VK_EXT_validation_features` extension subsumes all the 134functionality provided in the `apiext:VK_EXT_validation_flags` extension. 135==== 136