test(port_riscv): add boot-rt Cargo feature to the test driver

S-mode will need alteration to the boot process, hence needing a
separate boot mode.

Author: yvt

src/r3_port_riscv_test_driver/Cargo.toml

@@ -13,11 +13,14 @@ run = [
     "r3_port_riscv",
     "r3_portkit",
     "r3",
-    "riscv-rt",
     "riscv",
     "log",
 ]
 
+boot-rt = [
+    "riscv-rt",
+]
+
 output-rtt = [
     "rtt-target",
 ]

src/r3_port_riscv_test_driver/src/main.rs

@@ -78,6 +78,7 @@ macro_rules! instantiate_test {
 
         type System = r3_kernel::System<SystemTraits>;
         port::use_port!(unsafe struct SystemTraits);
+        #[cfg(feature = "boot-rt")]
         port::use_rt!(unsafe SystemTraits);
         port::use_mtime!(unsafe impl PortTimer for SystemTraits);
 

src/r3_test_runner/src/targets/jlink.rs

@@ -28,6 +28,7 @@ impl Target for RedV {
 
     fn cargo_features(&self) -> &[&str] {
         &[
+            "boot-rt",
             "output-rtt",
             "interrupt-e310x",
             "board-e310x-red-v",

src/r3_test_runner/src/targets/kflash.rs

@@ -27,6 +27,7 @@ impl Target for Maix {
 
     fn cargo_features(&self) -> &[&str] {
         &[
+            "boot-rt",
             "output-k210-uart",
             "interrupt-k210",
             "board-maix",

src/r3_test_runner/src/targets/qemu/riscv.rs

@@ -16,7 +16,12 @@ impl Target for QemuSiFiveE {
     }
 
     fn cargo_features(&self) -> &[&str] {
-        &["output-e310x-uart", "interrupt-e310x", "board-e310x-qemu"]
+        &[
+            "boot-rt",
+            "output-e310x-uart",
+            "interrupt-e310x",
+            "board-e310x-qemu",
+        ]
     }
 
     fn memory_layout_script(&self) -> String {
@@ -80,7 +85,12 @@ impl Target for QemuSiFiveU {
     }
 
     fn cargo_features(&self) -> &[&str] {
-        &["output-u540-uart", "interrupt-u540-qemu", "board-u540-qemu"]
+        &[
+            "boot-rt",
+            "output-u540-uart",
+            "interrupt-u540-qemu",
+            "board-u540-qemu",
+        ]
     }
 
     fn memory_layout_script(&self) -> String {