diff --git a/.github/workflows/regress.yml b/.github/workflows/regress.yml
index 191bbcad7..0deaac109 100755
--- a/.github/workflows/regress.yml
+++ b/.github/workflows/regress.yml
@@ -16,6 +16,17 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
       - uses: pre-commit/action@v3.0.1
+  regress-validate-cfgs:
+    runs-on: ubuntu-latest
+    env:
+      SINGULARITY: 1
+    steps:
+      - name: Clone Github Repo Action
+        uses: actions/checkout@v4
+      - name: singularity setup
+        uses: ./.github/actions/singularity-setup
+      - name: Validate all config files
+        run: ./do test:cfgs
   regress-smoke:
     needs: build-llvm
     runs-on: ubuntu-latest
diff --git a/Rakefile b/Rakefile
index fd4feea87..f1b31fd51 100755
--- a/Rakefile
+++ b/Rakefile
@@ -241,6 +241,27 @@ namespace :test do
 
     puts "All IDL passed type checking"
   end
+
+  desc "Validate all config files in cfgs/"
+  task :cfgs do
+    puts "Validating all config files..."
+    cfg_files = Dir["#{$root}/cfgs/*.yaml"]
+    failed_cfgs = []
+
+    cfg_files.each do |cfg_file|
+      cfg_name = File.basename(cfg_file, ".yaml")
+      puts "Validating #{cfg_name}..."
+      unless system "bundle exec udb validate cfg #{cfg_file}"
+        failed_cfgs << cfg_name
+      end
+    end
+
+    if failed_cfgs.empty?
+      puts "All config files are valid"
+    else
+      raise "Config validation failed for: #{failed_cfgs.join(', ')}"
+    end
+  end
 end
 
 def insert_warning(str, from)
diff --git a/cfgs/mc100-32-full-example.yaml b/cfgs/MC100-32-Full.yaml
similarity index 100%
rename from cfgs/mc100-32-full-example.yaml
rename to cfgs/MC100-32-Full.yaml
diff --git a/cfgs/prm_demo_rv32.yaml b/cfgs/prm_demo_rv32.yaml
index bf7b0be18..71339700e 100644
--- a/cfgs/prm_demo_rv32.yaml
+++ b/cfgs/prm_demo_rv32.yaml
@@ -3,7 +3,7 @@
 $schema: config_schema.json#
 kind: architecture configuration
 type: partially configured
-name: demo_rv32
+name: prm_demo_rv32
 description: |
   A demo RISC-V RV32 processor configuration for demonstrating
   the Programmer's Reference Manual generation capabilities.
diff --git a/cfgs/rv32-riscv-tests.yaml b/cfgs/rv32-riscv-tests.yaml
index a7eac07de..a8bec9427 100644
--- a/cfgs/rv32-riscv-tests.yaml
+++ b/cfgs/rv32-riscv-tests.yaml
@@ -113,6 +113,7 @@ params:
   STVEC_MODE_VECTORED: true
   SATP_MODE_BARE: true
   TRAP_ON_ECALL_FROM_S: true
+  TRAP_ON_ECALL_FROM_U: true
   TRAP_ON_SFENCE_VMA_WHEN_SATP_MODE_IS_READ_ONLY: false
   MSTATUS_FS_WRITABLE: false
   MSTATUS_VS_WRITABLE: false