diff --git a/src/vulkan/runtime/vk_physical_device.c b/src/vulkan/runtime/vk_physical_device.c
index 83f358e112c..28349eb700f 100644
--- a/src/vulkan/runtime/vk_physical_device.c
+++ b/src/vulkan/runtime/vk_physical_device.c
@@ -325,3 +325,33 @@ vk_common_GetPhysicalDeviceToolProperties(VkPhysicalDevice physicalDevice,
 
    return vk_outarray_status(&out);
 }
+
+VKAPI_ATTR VkDeviceSize VKAPI_CALL
+vk_common_GetPhysicalDeviceDescriptorSizeEXT(VkPhysicalDevice physicalDevice,
+                                             VkDescriptorType descriptorType)
+{
+   VK_FROM_HANDLE(vk_physical_device, pdevice, physicalDevice);
+
+   switch (descriptorType) {
+   case VK_DESCRIPTOR_TYPE_SAMPLER:
+      return pdevice->properties.samplerDescriptorSize;
+
+   case VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE:
+   case VK_DESCRIPTOR_TYPE_STORAGE_IMAGE:
+   case VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER:
+   case VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER:
+   case VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT:
+   case VK_DESCRIPTOR_TYPE_SAMPLE_WEIGHT_IMAGE_QCOM:
+   case VK_DESCRIPTOR_TYPE_BLOCK_MATCH_IMAGE_QCOM:
+      return pdevice->properties.imageDescriptorSize;
+
+   case VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER:
+   case VK_DESCRIPTOR_TYPE_STORAGE_BUFFER:
+   case VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_KHR:
+   case VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_NV:
+      return pdevice->properties.bufferDescriptorSize;
+
+   default:
+      UNREACHABLE("Invalid descriptor type in GetPhysicalDeviceDescriptorSizeEXT");
+   }
+}