Expand unit testing on CI.

Now using an exclusion approach instead of an inclusion approach, to
increase coverage.

Author: nnethercote

.github/workflows/ci_linux.yml

@@ -158,16 +158,15 @@ jobs:
             cargo clippy
           '
 
-      # Very limited testing because we can only run tests that don't rely on having a CUDA GPU.
+      # Exclude crates with tests that require an NVIDIA GPU: blastoff, cudnn, cust.
       - name: Test
         run: |
           docker exec "$CONTAINER_NAME" bash -lc 'set -euo pipefail
             export RUSTFLAGS=-Dwarnings
-            cargo test \
-              -p cuda_std \
-              -p gpu_rand \
-              -p nvvm \
-              -p rustc_codegen_nvvm
+            cargo test --workspace \
+              --exclude blastoff \
+              --exclude cudnn \
+              --exclude cust
           '
 
       - name: Check documentation

.github/workflows/ci_windows.yml

@@ -96,9 +96,10 @@ jobs:
           RUSTFLAGS: -Dwarnings
         run: cargo clippy --workspace --exclude "cudnn*" --exclude "gemm*" --exclude "i128*" --exclude "sha2*" --exclude "vecadd*"
 
-      # Very limited testing because we can only run tests that don't rely on having a CUDA GPU.
+        # Exclude crates with tests that require an NVIDIA GPU: blastoff, cudnn, cust.
+        # Exclude crates that require cuDNN, not available on Windows CI: cudnn, cudnn-sys.
       - name: Test
-        run: cargo test -p cuda_std -p gpu_rand -p nvvm -p rustc_codegen_nvvm
+        run: cargo test --workspace --exclude blastoff --exclude cudnn --exclude cudnn-sys --exclude cust
 
       - name: Check documentation
         env: