pvmfw: Apply debug policy from config to VM FDT
Apply the debug config device tree overlay obtained from the
configuration data to the final device tree that the payload will
receive.
Bug: 232900974
Test: atest MicrodroidTestApp # Uses default (userdebug?) DP
Change-Id: Ic616f6eddd669f09ad28e40fff61aa88a2bfb60c
diff --git a/libs/libfdt/src/lib.rs b/libs/libfdt/src/lib.rs
index 7c72fab..c6d6c2c 100644
--- a/libs/libfdt/src/lib.rs
+++ b/libs/libfdt/src/lib.rs
@@ -508,6 +508,19 @@
fdt_err_expect_zero(ret)
}
+ /// Applies a DT overlay on the base DT.
+ ///
+ /// # Safety
+ ///
+ /// On failure, the library corrupts the DT and overlay so both must be discarded.
+ pub unsafe fn apply_overlay<'a>(&'a mut self, overlay: &'a mut Fdt) -> Result<&'a mut Self> {
+ fdt_err_expect_zero(libfdt_bindgen::fdt_overlay_apply(
+ self.as_mut_ptr(),
+ overlay.as_mut_ptr(),
+ ))?;
+ Ok(self)
+ }
+
/// Return an iterator of memory banks specified the "/memory" node.
///
/// NOTE: This does not support individual "/memory@XXXX" banks.