[dv/keymgr] Modify keymgr tests to use post_start alert checking. Signed-off-by: Cindy Chen <chencindy@opentitan.org>

diff --git a/hw/dv/sv/cip_lib/seq_lib/cip_base_vseq.sv b/hw/dv/sv/cip_lib/seq_lib/cip_base_vseq.sv
index 1c5c361..79b7daa 100644
--- a/hw/dv/sv/cip_lib/seq_lib/cip_base_vseq.sv
+++ b/hw/dv/sv/cip_lib/seq_lib/cip_base_vseq.sv

@@ -137,11 +137,11 @@
     if (do_clear_all_interrupts) clear_all_interrupts();
 
     if (expect_fatal_alerts) begin
-      // Fatal alert is triggered in this seq. Wait 10_000ns to entire background check
+      // Fatal alert is triggered in this seq. Wait 10_000ns so the background check
       // `check_fatal_alert_nonblocking` has enough time to execute before dut_init.
       // Issue reset if reset is allowed, otherwise, reset will be called in upper vseq.
       #10_000ns;
-      if (do_apply_reset) dut_init();
+      dut_init();
     end else begin
       check_no_fatal_alerts();
     end

diff --git a/hw/ip/keymgr/dv/env/seq_lib/keymgr_base_vseq.sv b/hw/ip/keymgr/dv/env/seq_lib/keymgr_base_vseq.sv
index 3b231b3..a44d1fe 100644
--- a/hw/ip/keymgr/dv/env/seq_lib/keymgr_base_vseq.sv
+++ b/hw/ip/keymgr/dv/env/seq_lib/keymgr_base_vseq.sv

@@ -13,7 +13,6 @@
   // various knobs to enable certain routines
   bit do_keymgr_init = 1'b1;
   bit do_wait_for_init_done = 1'b1;
-  bit do_reset_at_end_of_seq = 1'b0;
   bit seq_check_en = 1'b1;
 
   // do operations at StReset
@@ -291,16 +290,4 @@
       csr_rd_check(.ptr(ral.working_state), .compare_value(keymgr_pkg::StInvalid));
     end
   endtask
-
-  task post_start();
-    super.post_start();
-
-    // If fatal alert will be triggered in this seq, issue reset if reset is allowed, otherwise,
-    // reset will be called in upper vseq
-    if (do_reset_at_end_of_seq) begin
-      #10_000ns;
-      if (do_apply_reset) apply_reset();
-    end
-  endtask
-
 endclass : keymgr_base_vseq

diff --git a/hw/ip/keymgr/dv/env/seq_lib/keymgr_cmd_invalid_vseq.sv b/hw/ip/keymgr/dv/env/seq_lib/keymgr_cmd_invalid_vseq.sv
index cb04d61..a31eefb 100644
--- a/hw/ip/keymgr/dv/env/seq_lib/keymgr_cmd_invalid_vseq.sv
+++ b/hw/ip/keymgr/dv/env/seq_lib/keymgr_cmd_invalid_vseq.sv

@@ -66,7 +66,7 @@
 
   task post_start();
     // fatal alert will be triggered, need reset to clear it
-    do_reset_at_end_of_seq = 1;
+    expect_fatal_alerts = 1;
     super.post_start();
     cfg.en_scb = 1;
     cfg.keymgr_vif.en_chk = 1;

diff --git a/hw/ip/keymgr/dv/env/seq_lib/keymgr_hwsw_invalid_input_vseq.sv b/hw/ip/keymgr/dv/env/seq_lib/keymgr_hwsw_invalid_input_vseq.sv
index 466b4e0..c6a2346 100644
--- a/hw/ip/keymgr/dv/env/seq_lib/keymgr_hwsw_invalid_input_vseq.sv
+++ b/hw/ip/keymgr/dv/env/seq_lib/keymgr_hwsw_invalid_input_vseq.sv

@@ -28,12 +28,8 @@
   endfunction
 
   task post_start();
+    expect_fatal_alerts = 1;
     super.post_start();
-
-    // fatal alert will be triggered in this seq. Issue reset if reset is allowed, otherwise, reset
-    // will be called in upper vseq
-    #10_000ns;
-    if (do_apply_reset) apply_reset();
   endtask
 
 endclass : keymgr_hwsw_invalid_input_vseq

diff --git a/hw/ip/keymgr/dv/env/seq_lib/keymgr_kmac_rsp_err_vseq.sv b/hw/ip/keymgr/dv/env/seq_lib/keymgr_kmac_rsp_err_vseq.sv
index bfda181..542efda 100644
--- a/hw/ip/keymgr/dv/env/seq_lib/keymgr_kmac_rsp_err_vseq.sv
+++ b/hw/ip/keymgr/dv/env/seq_lib/keymgr_kmac_rsp_err_vseq.sv

@@ -25,7 +25,7 @@
     cfg.m_keymgr_kmac_agent_cfg.error_rsp_pct = 20;
 
     // fatal alert will be triggered, need reset to clear it
-    do_reset_at_end_of_seq = 1;
+    expect_fatal_alerts = 1;
     super.pre_start();
   endtask
 

diff --git a/hw/ip/keymgr/dv/env/seq_lib/keymgr_sync_async_fault_cross_vseq.sv b/hw/ip/keymgr/dv/env/seq_lib/keymgr_sync_async_fault_cross_vseq.sv
index c57733e..a990ed3 100644
--- a/hw/ip/keymgr/dv/env/seq_lib/keymgr_sync_async_fault_cross_vseq.sv
+++ b/hw/ip/keymgr/dv/env/seq_lib/keymgr_sync_async_fault_cross_vseq.sv

@@ -68,7 +68,7 @@
   endfunction
 
   task post_start();
-    do_reset_at_end_of_seq = 1;
+    expect_fatal_alerts = 1;
     super.post_start();
     cfg.en_scb = 1;
     cfg.keymgr_vif.en_chk = 1;