[CHERIoT] Enable the RV Zbkb and Zbkc on Ibex and Kudu.

Author: resistor

clang/test/Driver/cheri/cheriot.c

@@ -12,6 +12,14 @@
 // IBEX: "-target-feature" "+b"
 // KUDU: "-target-feature" "+b"
 
+// CHERIOT-NOT: "-target-feature" "+zbkb"
+// IBEX: "-target-feature" "+zbkb"
+// KUDU: "-target-feature" "+zbkb"
+
+// CHERIOT-NOT: "-target-feature" "+zbkc"
+// IBEX: "-target-feature" "+zbkc"
+// KUDU: "-target-feature" "+zbkc"
+
 // ALL: "-target-feature" "+xcheriot"
 
 // BAREMETAL: "-target-abi" "cheriot-baremetal"

llvm/lib/Target/RISCV/RISCVProcessors.td

@@ -813,11 +813,13 @@ def CHERIOT_IBEX
                           [Feature32Bit, FeatureVendorXCheri,
                            FeatureVendorXCheriot, FeatureVendorXCheriPureCap,
                            FeatureStdExtB, FeatureStdExtC, FeatureStdExtE,
-                           FeatureStdExtM, FeatureUnalignedScalarMem]>;
+                           FeatureStdExtM, FeatureStdExtZbkb, FeatureStdExtZbkc,
+                           FeatureUnalignedScalarMem]>;
 
 def CHERIOT_KUDU
     : RISCVProcessorModel<"cheriot-kudu", NoSchedModel,
                           [Feature32Bit, FeatureVendorXCheri,
                            FeatureVendorXCheriot, FeatureVendorXCheriPureCap,
                            FeatureStdExtB, FeatureStdExtC, FeatureStdExtE,
-                           FeatureStdExtM, FeatureUnalignedScalarMem]>;
+                           FeatureStdExtM, FeatureStdExtZbkb, FeatureStdExtZbkc,
+                           FeatureUnalignedScalarMem]>;