WIP: Add API to check if the driver is currently supported

- [x] portio (Kernel not locked down) - [ ] cros_ec Linux (/dev/cros_ec available) - [ ] Windows (Kernel API available) Signed-off-by: Daniel Schaefer <[email protected]>
FrameworkComputer · Oct 30, 2023 · 405a1cc · 405a1cc
1 parent aaee360
commit 405a1cc
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/framework_lib/src/chromium_ec/portio.rs b/framework_lib/src/chromium_ec/portio.rs
@@ -190,6 +190,18 @@ lazy_static! {
     static ref INITIALIZED: Arc<Mutex<Initialized>> = Arc::new(Mutex::new(Initialized::NotYet));
 }
 
+fn _supported() -> bool {
+    #[cfg(feature = "linux_pio")]
+    unsafe {
+        if ioperm(EC_LPC_ADDR_HOST_ARGS as u64, 8 + 0xFF, 1) != 0 {
+            error!("ioperm failed. portio driver is likely block by Linux kernel lockdown mode");
+            return false;
+        }
+    }
+
+    true
+}
+
 #[cfg(not(feature = "linux_pio"))]
 fn init() -> bool {
     // Nothing to do for bare-metal (UEFI) port I/O