Regression tests for system register ttbr0_el2

Author: Jamesbarford

tests/ui/asm/aarch64/ttbr0_el2.rs

@@ -0,0 +1,11 @@
+//! Regression test for #97724, recognising ttbr0_el2 as a valid armv8 system register
+//@ only-aarch64
+//@ build-pass
+use std::arch::asm;
+
+static PT: [u64; 512] = [0; 512];
+fn main() {
+    unsafe {
+        asm!("msr ttbr0_el2, {pt}", pt = in(reg) &PT as *const _ );
+    }
+}