zeroize KV ctrl/status regs

Author: Mojtaba Bisheh Niasar

src/abr_top/rtl/abr_ctrl.sv

@@ -247,10 +247,10 @@ module abr_ctrl
 
   logic [SHAREDKEY_NUM_DWORDS-1:0][3:0][7:0] mlkem_sharedkey_data;
 
-  `CALIPTRA_KV_READ_STATUS_ASSIGN(kv_mldsa_seed, abr_reg_hwif_in)
-  `CALIPTRA_KV_READ_STATUS_ASSIGN(kv_mlkem_seed, abr_reg_hwif_in)
-  `CALIPTRA_KV_READ_STATUS_ASSIGN(kv_mlkem_msg, abr_reg_hwif_in)
-  `CALIPTRA_KV_WRITE_STATUS_ASSIGN(kv_mlkem_sharedkey, abr_reg_hwif_in)
+  `CALIPTRA_KV_READ_STATUS_ASSIGN(kv_mldsa_seed, abr_reg_hwif_in, zeroize)
+  `CALIPTRA_KV_READ_STATUS_ASSIGN(kv_mlkem_seed, abr_reg_hwif_in, zeroize)
+  `CALIPTRA_KV_READ_STATUS_ASSIGN(kv_mlkem_msg, abr_reg_hwif_in, zeroize)
+  `CALIPTRA_KV_WRITE_STATUS_ASSIGN(kv_mlkem_sharedkey, abr_reg_hwif_in, zeroize)
   `CALIPTRA_KV_READ_CTRL_REG2STRUCT(kv_mldsa_seed_read_ctrl_reg, kv_mldsa_seed_rd_ctrl, abr_reg_hwif_out)
   `CALIPTRA_KV_READ_CTRL_REG2STRUCT(kv_mlkem_seed_read_ctrl_reg, kv_mlkem_seed_rd_ctrl, abr_reg_hwif_out)
   `CALIPTRA_KV_READ_CTRL_REG2STRUCT(kv_mlkem_msg_read_ctrl_reg,  kv_mlkem_msg_rd_ctrl, abr_reg_hwif_out)
@@ -262,22 +262,18 @@ module abr_ctrl
   always_comb kv_mlkem_msg_data_present_set = kv_mlkem_msg_read_ctrl_reg.read_en;
 
   //lock kv controls
-  always_comb abr_reg_hwif_in.kv_mldsa_seed_rd_ctrl.read_en.hwclr        = zeroize;
   always_comb abr_reg_hwif_in.kv_mldsa_seed_rd_ctrl.read_en.swwe         = !kv_mldsa_seed_data_present && abr_ready;
   always_comb abr_reg_hwif_in.kv_mldsa_seed_rd_ctrl.read_entry.swwe      = !kv_mldsa_seed_data_present && abr_ready;
   always_comb abr_reg_hwif_in.kv_mldsa_seed_rd_ctrl.pcr_hash_extend.swwe = !kv_mldsa_seed_data_present && abr_ready;
   always_comb abr_reg_hwif_in.kv_mldsa_seed_rd_ctrl.rsvd.swwe            = !kv_mldsa_seed_data_present && abr_ready;
-  always_comb abr_reg_hwif_in.kv_mlkem_seed_rd_ctrl.read_en.hwclr        = zeroize;
   always_comb abr_reg_hwif_in.kv_mlkem_seed_rd_ctrl.read_en.swwe         = !kv_mlkem_seed_data_present && abr_ready;
   always_comb abr_reg_hwif_in.kv_mlkem_seed_rd_ctrl.read_entry.swwe      = !kv_mlkem_seed_data_present && abr_ready;
   always_comb abr_reg_hwif_in.kv_mlkem_seed_rd_ctrl.pcr_hash_extend.swwe = !kv_mlkem_seed_data_present && abr_ready;
   always_comb abr_reg_hwif_in.kv_mlkem_seed_rd_ctrl.rsvd.swwe            = !kv_mlkem_seed_data_present && abr_ready;
-  always_comb abr_reg_hwif_in.kv_mlkem_msg_rd_ctrl.read_en.hwclr         = zeroize;
   always_comb abr_reg_hwif_in.kv_mlkem_msg_rd_ctrl.read_en.swwe          = !kv_mlkem_msg_data_present  && abr_ready;
   always_comb abr_reg_hwif_in.kv_mlkem_msg_rd_ctrl.read_entry.swwe       = !kv_mlkem_msg_data_present  && abr_ready;
   always_comb abr_reg_hwif_in.kv_mlkem_msg_rd_ctrl.pcr_hash_extend.swwe  = !kv_mlkem_msg_data_present  && abr_ready;
   always_comb abr_reg_hwif_in.kv_mlkem_msg_rd_ctrl.rsvd.swwe             = !kv_mlkem_msg_data_present  && abr_ready;
-  always_comb abr_reg_hwif_in.kv_mlkem_sharedkey_wr_ctrl.write_en.hwclr             = zeroize;
   always_comb abr_reg_hwif_in.kv_mlkem_sharedkey_wr_ctrl.write_en.swwe              = abr_ready;
   always_comb abr_reg_hwif_in.kv_mlkem_sharedkey_wr_ctrl.write_entry.swwe           = abr_ready;
   always_comb abr_reg_hwif_in.kv_mlkem_sharedkey_wr_ctrl.hmac_key_dest_valid.swwe   = abr_ready;