buildkite: Add Xen specific tests in CI

Some of the custom tests are run with only "backend-mmap" feature
enabled. Run them for "xen" as well.

Some of the standard tests from rust-vmm-ci run with "--all-features"
(which include "xen" too), add custom tests for those without the "xen"
feature.

Since the tests from rust-vmm-ci are named normally (without "xen"
keyword), append non-xen tests with "-no-xen" to make those clear.

Signed-off-by: Viresh Kumar <[email protected]>

Author: vireshk

.buildkite/custom-tests.json

@@ -2,18 +2,60 @@
   "tests": [
     {
       "test_name": "build-gnu-mmap",
+      "command": "cargo build --release --features=xen",
+      "platform": ["x86_64", "aarch64"]
+    },
+    {
+      "test_name": "build-gnu-mmap-no-xen",
       "command": "cargo build --release --features=backend-mmap",
       "platform": ["x86_64", "aarch64"]
     },
     {
       "test_name": "build-musl-mmap",
+      "command": "cargo build --release --features=xen --target {target_platform}-unknown-linux-musl",
+      "platform": ["x86_64", "aarch64"]
+    },
+    {
+      "test_name": "build-musl-mmap-no-xen",
       "command": "cargo build --release --features=backend-mmap --target {target_platform}-unknown-linux-musl",
       "platform": ["x86_64", "aarch64"]
     },
     {
       "test_name": "miri",
       "command": "RUST_BACKTRACE=1 MIRIFLAGS='-Zmiri-disable-isolation -Zmiri-panic-on-unsupported -Zmiri-backtrace=full' cargo +nightly miri test --features backend-mmap",
       "platform": ["x86_64", "aarch64"]
+    },
+    {
+      "test_name": "unittests-gnu-no-xen",
+      "command": "cargo test --features 'backend-bitmap backend-mmap backend-atomic' --workspace",
+      "platform": [
+        "x86_64",
+        "aarch64"
+      ]
+    },
+    {
+      "test_name": "unittests-musl-no-xen",
+      "command": "cargo test  --features 'backend-bitmap backend-mmap backend-atomic' --workspace --target {target_platform}-unknown-linux-musl",
+      "platform": [
+        "x86_64",
+        "aarch64"
+      ]
+    },
+    {
+      "test_name": "clippy-no-xen",
+      "command": "cargo clippy --workspace --bins --examples --benches  --features 'backend-bitmap backend-mmap backend-atomic' --all-targets -- -D warnings -D clippy::undocumented_unsafe_blocks",
+      "platform": [
+        "x86_64",
+        "aarch64"
+      ]
+    },
+    {
+      "test_name": "check-warnings-no-xen",
+      "command": "RUSTFLAGS=\"-D warnings\" cargo check --all-targets  --features 'backend-bitmap backend-mmap backend-atomic' --workspace",
+      "platform": [
+        "x86_64",
+        "aarch64"
+      ]
     }
   ]
 }