[Qemu-devel] [PATCH 3/5] target-arm: Add CP_ACCESS_TRAP_UNCATEGORIZED_EL2, 3

[Peter Maydell <peter.maydell@linaro.org>]

Some coprocessor register access functions need to be able
to report "trap to EL3 with an 'uncategorized' syndrome";
add the necessary CPAccessResult enum and handling for it.

I don't currently know of any registers that need to trap
to EL2 with the 'uncategorized' syndrome, but adding the
_EL2 enum as well is trivial and fills in what would
otherwise be an odd gap in the handling.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target-arm/cpu.h       | 3 +++
 target-arm/op_helper.c | 8 ++++++++
 2 files changed, 11 insertions(+)

diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index 7e89152..685474e 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -1280,6 +1280,9 @@ typedef enum CPAccessResult {
     /* As CP_ACCESS_TRAP, but for traps directly to EL2 or EL3 */
     CP_ACCESS_TRAP_EL2 = 3,
     CP_ACCESS_TRAP_EL3 = 4,
+    /* As CP_ACCESS_UNCATEGORIZED, but for traps directly to EL2 or EL3 */
+    CP_ACCESS_TRAP_UNCATEGORIZED_EL2 = 5,
+    CP_ACCESS_TRAP_UNCATEGORIZED_EL3 = 6,
 } CPAccessResult;
 
 /* Access functions for coprocessor registers. These cannot fail and
diff --git a/target-arm/op_helper.c b/target-arm/op_helper.c
index 663c05d..1425a1d 100644
--- a/target-arm/op_helper.c
+++ b/target-arm/op_helper.c
@@ -444,6 +444,14 @@ void HELPER(access_check_cp_reg)(CPUARMState *env, void *rip, uint32_t syndrome)
         target_el = exception_target_el(env);
         syndrome = syn_uncategorized();
         break;
+    case CP_ACCESS_TRAP_UNCATEGORIZED_EL2:
+        target_el = 2;
+        syndrome = syn_uncategorized();
+        break;
+    case CP_ACCESS_TRAP_UNCATEGORIZED_EL3:
+        target_el = 3;
+        syndrome = syn_uncategorized();
+        break;
     default:
         g_assert_not_reached();
     }
-- 
1.9.1