[keymgr_dpe,data] Expose the new FlopToKmac parameter in the hjson

Signed-off-by: Rupert Swarbrick <rswarbrick@lowrisc.org>

Author: rswarbrick

hw/ip/keymgr_dpe/data/keymgr_dpe.hjson

@@ -125,6 +125,16 @@
       local:     "false",
       expose:    "true",
     }
+    { name:      "FlopToKmac",
+      desc:      '''
+        If true, insert flops to break a potential long chain between
+        the active key slot and KMAC.
+      ''',
+      type:      "bit",
+      default:   "0",
+      local:     "false",
+      expose:    "true",
+    }
     // Random netlist constants
     { name:      "RndCnstLfsrSeed",
       desc:      "Compile-time random bits for initial LFSR seed",

hw/top_darjeeling/data/autogen/top_darjeeling.gen.hjson

@@ -6122,6 +6122,19 @@
           expose: "true"
           name_top: KeymgrDpeKmacEnMasking
         }
+        {
+          name: FlopToKmac
+          desc:
+            '''
+            If true, insert flops to break a potential long chain between
+            the active key slot and KMAC.
+            '''
+          type: bit
+          default: "0"
+          local: "false"
+          expose: "true"
+          name_top: KeymgrDpeFlopToKmac
+        }
         {
           name: RndCnstLfsrSeed
           desc: Compile-time random bits for initial LFSR seed

hw/top_darjeeling/rtl/autogen/top_darjeeling.sv

@@ -85,6 +85,7 @@ module top_darjeeling #(
   parameter bit SecOtbnSkipUrndReseedAtStart = 0,
   // parameters for keymgr_dpe
   parameter bit KeymgrDpeKmacEnMasking = 1,
+  parameter bit KeymgrDpeFlopToKmac = 0,
   // parameters for csrng
   parameter aes_pkg::sbox_impl_e CsrngSBoxImpl = aes_pkg::SBoxImplCanright,
   // parameters for entropy_src
@@ -1995,6 +1996,7 @@ module top_darjeeling #(
     .AlertAsyncOn(alert_handler_reg_pkg::AsyncOn[61:60]),
     .AlertSkewCycles(top_pkg::AlertSkewCycles),
     .KmacEnMasking(KeymgrDpeKmacEnMasking),
+    .FlopToKmac(KeymgrDpeFlopToKmac),
     .RndCnstLfsrSeed(RndCnstKeymgrDpeLfsrSeed),
     .RndCnstLfsrPerm(RndCnstKeymgrDpeLfsrPerm),
     .RndCnstRandPerm(RndCnstKeymgrDpeRandPerm),