venus: add stubs for accel struct host commands

They won't be implemented, and the host cmds feature will always be
disabled in venus.

Signed-off-by: Yiwei Zhang <zzyiwei@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33907>

src/virtio/vulkan/meson.build

@@ -51,6 +51,7 @@ devenv.append('VK_DRIVER_FILES', _dev_icd.full_path())
 devenv.append('VK_ICD_FILENAMES', _dev_icd.full_path())
 
 libvn_files = files(
+  'vn_acceleration_structure.c',
   'vn_buffer.c',
   'vn_command_buffer.c',
   'vn_common.c',

src/virtio/vulkan/vn_acceleration_structure.c

@@ -0,0 +1,69 @@
+/*
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "vn_acceleration_structure.h"
+
+#include "vn_device.h"
+
+VkResult
+vn_BuildAccelerationStructuresKHR(
+   VkDevice device,
+   VkDeferredOperationKHR deferredOperation,
+   uint32_t infoCount,
+   const VkAccelerationStructureBuildGeometryInfoKHR *pInfos,
+   const VkAccelerationStructureBuildRangeInfoKHR *const *ppBuildRangeInfos)
+{
+   struct vn_device *dev = vn_device_from_handle(device);
+   unreachable("Unimplemented");
+   return vn_error(dev->instance, VK_ERROR_FEATURE_NOT_PRESENT);
+}
+
+VkResult
+vn_CopyAccelerationStructureKHR(
+   VkDevice device,
+   VkDeferredOperationKHR deferredOperation,
+   const VkCopyAccelerationStructureInfoKHR *pInfo)
+{
+   struct vn_device *dev = vn_device_from_handle(device);
+   unreachable("Unimplemented");
+   return vn_error(dev->instance, VK_ERROR_FEATURE_NOT_PRESENT);
+}
+
+VkResult
+vn_CopyAccelerationStructureToMemoryKHR(
+   VkDevice device,
+   VkDeferredOperationKHR deferredOperation,
+   const VkCopyAccelerationStructureToMemoryInfoKHR *pInfo)
+{
+   struct vn_device *dev = vn_device_from_handle(device);
+   unreachable("Unimplemented");
+   return vn_error(dev->instance, VK_ERROR_FEATURE_NOT_PRESENT);
+}
+
+VkResult
+vn_CopyMemoryToAccelerationStructureKHR(
+   VkDevice device,
+   VkDeferredOperationKHR deferredOperation,
+   const VkCopyMemoryToAccelerationStructureInfoKHR *pInfo)
+{
+   struct vn_device *dev = vn_device_from_handle(device);
+   unreachable("Unimplemented");
+   return vn_error(dev->instance, VK_ERROR_FEATURE_NOT_PRESENT);
+}
+
+VkResult
+vn_WriteAccelerationStructuresPropertiesKHR(
+   VkDevice device,
+   uint32_t accelerationStructureCount,
+   const VkAccelerationStructureKHR *pAccelerationStructures,
+   VkQueryType queryType,
+   size_t dataSize,
+   void *pData,
+   size_t stride)
+{
+   struct vn_device *dev = vn_device_from_handle(device);
+   unreachable("Unimplemented");
+   return vn_error(dev->instance, VK_ERROR_FEATURE_NOT_PRESENT);
+}

src/virtio/vulkan/vn_acceleration_structure.h

@@ -0,0 +1,19 @@
+/*
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: MIT
+ */
+
+#ifndef VN_ACCELERATION_STRUCTURE_H
+#define VN_ACCELERATION_STRUCTURE_H
+
+#include "vn_common.h"
+
+struct vn_acceleration_structure {
+   struct vn_object_base base;
+};
+VK_DEFINE_NONDISP_HANDLE_CASTS(vn_acceleration_structure,
+                               base.base,
+                               VkAccelerationStructureKHR,
+                               VK_OBJECT_TYPE_ACCELERATION_STRUCTURE_KHR)
+
+#endif /* VN_ACCELERATION_STRUCTURE_H */