target/arm: Copy EXLOCKEn to EXLOCK on exception to the same EL

Per R_WTXBY, PSTATE.EXLOCK is 0 on an exception to a higher EL,
and copied from EXLOCKEn otherwise.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-61-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/target/arm/helper.c b/target/arm/helper.c
index 1aa0a157b72957e208ee6641db6e841fa066126e..0077788e1e84aaf2163c253e28302b5844f980b4 100644 (file)
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -9071,8 +9071,13 @@ static void arm_cpu_do_interrupt_aarch64(CPUState *cs)
         } else {
             addr += 0x600;
         }
-    } else if (pstate_read(env) & PSTATE_SP) {
-        addr += 0x200;
+    } else {
+        if (pstate_read(env) & PSTATE_SP) {
+            addr += 0x200;
+        }
+        if (is_a64(env) && (env->cp15.gcscr_el[new_el] & GCSCR_EXLOCKEN)) {
+            new_mode |= PSTATE_EXLOCK;
+        }
     }
 
     switch (cs->exception_index) {