zink/codegen: introduce notion of non-standard extensions

this is for the MoltenVK extensions, especially "VK_MVK_moltenvk", which
right now is reserved in the registry. Making it non-standard skips all
the validations.

Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9021>

src/gallium/drivers/zink/zink_device_info.py

@@ -115,6 +115,7 @@ EXTENSIONS = [
         alias="stencil_export"),
     Extension("VK_EXTX_portability_subset",
         alias="portability_subset_extx",
+        nonstandard=True,
         properties=True,
         features=True,
         guard=True),

src/gallium/drivers/zink/zink_extensions.py

@@ -61,6 +61,7 @@ class Extension:
     name           : str   = None
     alias          : str   = None
     is_required    : bool  = False
+    is_nonstandard : bool  = False
     enable_conds   : [str] = None
 
     # these are specific to zink_device_info.py:
@@ -72,12 +73,13 @@ class Extension:
     core_since     : Version = None
     instance_funcs : [str]   = None
 
-    def __init__(self, name, alias="", required=False, properties=False,
-                 features=False, conditions=None, guard=False, core_since=None,
-                 functions=None):
+    def __init__(self, name, alias="", required=False, nonstandard=False,
+                 properties=False, features=False, conditions=None, guard=False,
+                 core_since=None, functions=None):
         self.name = name
         self.alias = alias
         self.is_required = required
+        self.is_nonstandard = nonstandard
         self.has_properties = properties
         self.has_features = features
         self.enable_conds = conditions

src/gallium/drivers/zink/zink_instance.py

@@ -45,7 +45,8 @@ EXTENSIONS = [
     Extension("VK_KHR_get_physical_device_properties2",
         functions=["GetPhysicalDeviceFeatures2", "GetPhysicalDeviceProperties2"]),
     Extension("VK_KHR_external_memory_capabilities"),
-    Extension("VK_MVK_moltenvk"),
+    Extension("VK_MVK_moltenvk",
+        nonstandard=True),
 ]
 
 # constructor: Layer(name, conditions=[])
@@ -295,7 +296,11 @@ if __name__ == "__main__":
     # Perform extension validation and set core_since for the extension if available
     error_count = 0
     for ext in extensions:
-        if not registry.in_registry(ext.name) and not "MVK" in ext.name:
+        if not registry.in_registry(ext.name):
+            # disable validation for nonstandard extensions
+            if ext.is_nonstandard:
+                continue
+
             error_count += 1
             print("The extension {} is not registered in vk.xml - a typo?".format(ext.name))
             continue