diff --git a/include/swift/AST/PlatformKinds.def b/include/swift/AST/PlatformKinds.def
index 885bd81c16850..bbc788c2d7ca9 100644
--- a/include/swift/AST/PlatformKinds.def
+++ b/include/swift/AST/PlatformKinds.def
@@ -34,6 +34,11 @@ AVAILABILITY_PLATFORM(visionOSApplicationExtension, "application extensions for
 AVAILABILITY_PLATFORM(macOSApplicationExtension, "application extensions for macOS")
 AVAILABILITY_PLATFORM(macCatalyst, "Mac Catalyst")
 AVAILABILITY_PLATFORM(macCatalystApplicationExtension, "application extensions for Mac Catalyst")
+AVAILABILITY_PLATFORM(DriverKit, "DriverKit")
+/// A meta-platform representing the built-in Swift runtime.
+AVAILABILITY_PLATFORM(Swift, "Swift")
+/// A meta-platform for Apple operating systems with unified versioning.
+AVAILABILITY_PLATFORM(anyAppleOS, "any Apple OS")
 AVAILABILITY_PLATFORM(FreeBSD, "FreeBSD")
 AVAILABILITY_PLATFORM(OpenBSD, "OpenBSD")
 AVAILABILITY_PLATFORM(Windows, "Windows")
diff --git a/lib/AST/PlatformKindUtils.cpp b/lib/AST/PlatformKindUtils.cpp
index bf8fca3bad5d1..3e6406a6677d7 100644
--- a/lib/AST/PlatformKindUtils.cpp
+++ b/lib/AST/PlatformKindUtils.cpp
@@ -115,6 +115,9 @@ swift::basePlatformForExtensionPlatform(PlatformKind Platform) {
   case PlatformKind::tvOS:
   case PlatformKind::watchOS:
   case PlatformKind::visionOS:
+  case PlatformKind::DriverKit:
+  case PlatformKind::Swift:
+  case PlatformKind::anyAppleOS:
   case PlatformKind::FreeBSD:
   case PlatformKind::OpenBSD:
   case PlatformKind::Windows:
@@ -159,6 +162,11 @@ static bool isPlatformActiveForTarget(PlatformKind Platform,
     case PlatformKind::visionOS:
     case PlatformKind::visionOSApplicationExtension:
       return Target.isXROS();
+    case PlatformKind::DriverKit:
+      return Target.isDriverKit();
+    case PlatformKind::Swift:
+    case PlatformKind::anyAppleOS:
+      return Target.isOSDarwin();
     case PlatformKind::OpenBSD:
       return Target.isOSOpenBSD();
     case PlatformKind::FreeBSD:
@@ -292,6 +300,11 @@ swift::tripleOSTypeForPlatform(PlatformKind platform) {
   case PlatformKind::visionOS:
   case PlatformKind::visionOSApplicationExtension:
     return llvm::Triple::XROS;
+  case PlatformKind::DriverKit:
+    return llvm::Triple::DriverKit;
+  case PlatformKind::Swift:
+  case PlatformKind::anyAppleOS:
+      return std::nullopt;
   case PlatformKind::FreeBSD:
     return llvm::Triple::FreeBSD;
   case PlatformKind::OpenBSD:
@@ -332,6 +345,9 @@ bool swift::isPlatformSPI(PlatformKind Platform) {
   case PlatformKind::watchOSApplicationExtension:
   case PlatformKind::visionOS:
   case PlatformKind::visionOSApplicationExtension:
+  case PlatformKind::DriverKit:
+  case PlatformKind::Swift:
+  case PlatformKind::anyAppleOS:
   case PlatformKind::OpenBSD:
   case PlatformKind::FreeBSD:
   case PlatformKind::Windows:
diff --git a/lib/ClangImporter/ClangImporter.cpp b/lib/ClangImporter/ClangImporter.cpp
index ad3e3a990ec17..1eae3a4ecd4ea 100644
--- a/lib/ClangImporter/ClangImporter.cpp
+++ b/lib/ClangImporter/ClangImporter.cpp
@@ -2561,6 +2561,14 @@ PlatformAvailability::PlatformAvailability(const LangOptions &langOpts)
   case PlatformKind::visionOSApplicationExtension:
     break;
 
+  case PlatformKind::DriverKit:
+    deprecatedAsUnavailableMessage = "";
+    break;
+
+  case PlatformKind::Swift:
+  case PlatformKind::anyAppleOS:
+    llvm_unreachable("Unexpected platform");
+
   case PlatformKind::FreeBSD:
     deprecatedAsUnavailableMessage = "";
     break;
@@ -2616,6 +2624,13 @@ bool PlatformAvailability::isPlatformRelevant(StringRef name) const {
     return name == "xros" || name == "xros_app_extension" ||
            name == "visionos" || name == "visionos_app_extension";
 
+  case PlatformKind::DriverKit:
+    return name == "driverkit";
+
+  case PlatformKind::Swift:
+  case PlatformKind::anyAppleOS:
+    break; // Unexpected
+
   case PlatformKind::FreeBSD:
     return name == "freebsd";
 
@@ -2693,6 +2708,15 @@ bool PlatformAvailability::treatDeprecatedAsUnavailable(
     // No deprecation filter on xrOS
     return false;
 
+  case PlatformKind::DriverKit:
+    // No deprecation filter on DriverKit
+    // FIXME: [availability] This should probably have a value.
+    return false;
+
+  case PlatformKind::Swift:
+  case PlatformKind::anyAppleOS:
+    break; // Unexpected
+
   case PlatformKind::FreeBSD:
     // No deprecation filter on FreeBSD
     return false;
diff --git a/lib/IRGen/TBDGen.cpp b/lib/IRGen/TBDGen.cpp
index 8bf56ba1c1108..ee23a1b55f605 100644
--- a/lib/IRGen/TBDGen.cpp
+++ b/lib/IRGen/TBDGen.cpp
@@ -245,6 +245,12 @@ getLinkerPlatformId(OriginallyDefinedInAttr::ActiveVersion Ver,
   switch(Ver.Platform) {
   case swift::PlatformKind::none:
     llvm_unreachable("cannot find platform kind");
+  case swift::PlatformKind::DriverKit:
+    llvm_unreachable("not used for this platform");
+  case swift::PlatformKind::Swift:
+    llvm_unreachable("not used for this platform");
+  case PlatformKind::anyAppleOS:
+    llvm_unreachable("not used for this platform");
   case swift::PlatformKind::FreeBSD:
     llvm_unreachable("not used for this platform");
   case swift::PlatformKind::OpenBSD:
@@ -253,6 +259,7 @@ getLinkerPlatformId(OriginallyDefinedInAttr::ActiveVersion Ver,
     llvm_unreachable("not used for this platform");
   case swift::PlatformKind::Android:
     llvm_unreachable("not used for this platform");
+
   case swift::PlatformKind::iOS:
   case swift::PlatformKind::iOSApplicationExtension:
     if (target && target->isMacCatalystEnvironment())
diff --git a/lib/PrintAsClang/DeclAndTypePrinter.cpp b/lib/PrintAsClang/DeclAndTypePrinter.cpp
index 868238a4e8d32..e695067934f2b 100644
--- a/lib/PrintAsClang/DeclAndTypePrinter.cpp
+++ b/lib/PrintAsClang/DeclAndTypePrinter.cpp
@@ -1821,6 +1821,14 @@ class DeclAndTypePrinter::Implementation
       case PlatformKind::visionOSApplicationExtension:
         plat = "visionos_app_extension";
         break;
+      case PlatformKind::DriverKit:
+        plat = "driverkit";
+        break;
+      case PlatformKind::Swift:
+      case PlatformKind::anyAppleOS:
+        // FIXME: [runtime availability] Figure out how to support this.
+        ASSERT(0);
+        break;
       case PlatformKind::FreeBSD:
         plat = "freebsd";
         break;
diff --git a/lib/Serialization/ModuleFormat.h b/lib/Serialization/ModuleFormat.h
index a7a57755a1dda..846e2c99fbbb4 100644
--- a/lib/Serialization/ModuleFormat.h
+++ b/lib/Serialization/ModuleFormat.h
@@ -58,7 +58,7 @@ const uint16_t SWIFTMODULE_VERSION_MAJOR = 0;
 /// describe what change you made. The content of this comment isn't important;
 /// it just ensures a conflict if two people change the module format.
 /// Don't worry about adhering to the 80-column limit for this line.
-const uint16_t SWIFTMODULE_VERSION_MINOR = 970; // return_borrow
+const uint16_t SWIFTMODULE_VERSION_MINOR = 971; // new platform kinds
 
 /// A standard hash seed used for all string hashes in a serialized module.
 ///
diff --git a/lib/SymbolGraphGen/AvailabilityMixin.cpp b/lib/SymbolGraphGen/AvailabilityMixin.cpp
index 10431c6562dbf..75a1c150e409b 100644
--- a/lib/SymbolGraphGen/AvailabilityMixin.cpp
+++ b/lib/SymbolGraphGen/AvailabilityMixin.cpp
@@ -54,6 +54,12 @@ StringRef getDomain(const SemanticAvailableAttr &AvAttr) {
       return { "watchOSAppExtension" };
     case swift::PlatformKind::visionOSApplicationExtension:
       return { "visionOSAppExtension" };
+    case PlatformKind::DriverKit:
+      return { "DriverKit" };
+    case swift::PlatformKind::Swift:
+      return { "Swift" };
+    case PlatformKind::anyAppleOS:
+      return { "Any Apple OS" };
     case swift::PlatformKind::FreeBSD:
       return { "FreeBSD" };
     case swift::PlatformKind::OpenBSD:
diff --git a/test/IDE/complete_decl_attribute.swift b/test/IDE/complete_decl_attribute.swift
index 7219f727a7868..9e020bf773abd 100644
--- a/test/IDE/complete_decl_attribute.swift
+++ b/test/IDE/complete_decl_attribute.swift
@@ -83,6 +83,9 @@ actor MyGenericGlobalActor<T> {
 // AVAILABILITY1-NEXT: Keyword/None:                       macOSApplicationExtension[#Platform#]; name=macOSApplicationExtension{{$}}
 // AVAILABILITY1-NEXT: Keyword/None:                       macCatalyst[#Platform#]; name=macCatalyst
 // AVAILABILITY1-NEXT: Keyword/None:                       macCatalystApplicationExtension[#Platform#]; name=macCatalystApplicationExtension
+// AVAILABILITY1-NEXT: Keyword/None:                       DriverKit[#Platform#]; name=DriverKit{{$}}
+// AVAILABILITY1-NEXT: Keyword/None:                       Swift[#Platform#]; name=Swift{{$}}
+// AVAILABILITY1-NEXT: Keyword/None:                       anyAppleOS[#Platform#]; name=anyAppleOS{{$}}
 // AVAILABILITY1-NEXT: Keyword/None:                       FreeBSD[#Platform#]; name=FreeBSD{{$}}
 // AVAILABILITY1-NEXT: Keyword/None:                       OpenBSD[#Platform#]; name=OpenBSD{{$}}
 // AVAILABILITY1-NEXT: Keyword/None:                       Windows[#Platform#]; name=Windows{{$}}
diff --git a/tools/SourceKit/lib/SwiftLang/SwiftDocSupport.cpp b/tools/SourceKit/lib/SwiftLang/SwiftDocSupport.cpp
index e946bb4b7b857..e0fe3b12c8515 100644
--- a/tools/SourceKit/lib/SwiftLang/SwiftDocSupport.cpp
+++ b/tools/SourceKit/lib/SwiftLang/SwiftDocSupport.cpp
@@ -693,6 +693,9 @@ static void reportAvailabilityAttributes(ASTContext &Ctx, const Decl *D,
   static UIdent PlatformOSXAppExt("source.availability.platform.osx_app_extension");
   static UIdent PlatformtvOSAppExt("source.availability.platform.tvos_app_extension");
   static UIdent PlatformWatchOSAppExt("source.availability.platform.watchos_app_extension");
+  static UIdent PlatformDriverKit("source.availability.platform.driverkit");
+  static UIdent PlatformSwift("source.availability.platform.swift");
+  static UIdent PlatformAnyAppleOS("source.availability.platform.any_apple_os");
   static UIdent PlatformFreeBSD("source.availability.platform.freebsd");
   static UIdent PlatformOpenBSD("source.availability.platform.openbsd");
   static UIdent PlatformWindows("source.availability.platform.windows");
@@ -743,6 +746,15 @@ static void reportAvailabilityAttributes(ASTContext &Ctx, const Decl *D,
       // FIXME: Formal platform support in SourceKit is needed.
       PlatformUID = UIdent();
       break;
+    case PlatformKind::DriverKit:
+      PlatformUID = PlatformDriverKit;
+      break;
+    case PlatformKind::Swift:
+      PlatformUID = PlatformSwift;
+      break;
+    case PlatformKind::anyAppleOS:
+      PlatformUID = PlatformAnyAppleOS;
+      break;
     case PlatformKind::OpenBSD:
       PlatformUID = PlatformOpenBSD;
       break;
@@ -756,7 +768,7 @@ static void reportAvailabilityAttributes(ASTContext &Ctx, const Decl *D,
       PlatformUID = PlatformAndroid;
       break;
     }
-    // FIXME: [availability] Handle other availability domains?
+    // FIXME: [availability] Handle non-platform availability domains?
 
     AvailableAttrInfo Info;
     Info.AttrKind = AvailableAttrKind;