[13/18] target/arm: Move MDCR_TDE test into exception_target_el

Commit Message

Richard Henderson May 23, 2022, 8:47 p.m. UTC

Add a debug parameter, and when true test MDCR_EL2.TDE.
Use this in arm_debug_target_el.

Signed-off-by: Richard Henderson <[e-mail]>
---
 target/arm/internals.h  | 20 +++-----------------
 target/arm/op_helper.c  | 12 ++++++++++--
 target/arm/tlb_helper.c |  4 ++--
 3 files changed, 15 insertions(+), 21 deletions(-)

Patch

diff --git a/target/arm/internals.h b/target/arm/internals.h
index 6df38db836..fbb69e6919 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -1074,27 +1074,13 @@  typedef struct ARMVAParameters {
 ARMVAParameters aa64_va_parameters(CPUARMState *env, uint64_t va,
                                    ARMMMUIdx mmu_idx, bool data);
 
-int exception_target_el(CPUARMState *env, int cur_el, uint32_t *psyn);
+int exception_target_el(CPUARMState *env, int cur_el,
+                        uint32_t *psyn, bool debug);
 
 /* Return the Exception Level targeted by debug exceptions. */
 static inline int arm_debug_target_el(CPUARMState *env)
 {
-    bool secure = arm_is_secure(env);
-    bool route_to_el2 = false;
-
-    if (arm_is_el2_enabled(env)) {
-        route_to_el2 = env->cp15.hcr_el2 & HCR_TGE ||
-                       env->cp15.mdcr_el2 & MDCR_TDE;
-    }
-
-    if (route_to_el2) {
-        return 2;
-    } else if (arm_feature(env, ARM_FEATURE_EL3) &&
-               !arm_el_is_aa64(env, 3) && secure) {
-        return 3;
-    } else {
-        return 1;
-    }
+    return exception_target_el(env, 0, NULL, true);
 }
 
 /* Determine if allocation tags are available.  */
diff --git a/target/arm/op_helper.c b/target/arm/op_helper.c
index c4988b6c41..9fc9ab3d20 100644
--- a/target/arm/op_helper.c
+++ b/target/arm/op_helper.c
@@ -28,7 +28,8 @@ 
 #define SIGNBIT (uint32_t)0x80000000
 #define SIGNBIT64 ((uint64_t)1 << 63)
 
-int exception_target_el(CPUARMState *env, int cur_el, uint32_t *psyn)
+int exception_target_el(CPUARMState *env, int cur_el,
+                        uint32_t *psyn, bool debug)
 {
     /*
      * FIXME: The following tests really apply to an EL0 origin,
@@ -62,6 +63,12 @@  int exception_target_el(CPUARMState *env, int cur_el, uint32_t *psyn)
         return 2;
     }
 
+    if (debug
+        && (env->cp15.mdcr_el2 & MDCR_TDE)
+        && arm_is_el2_enabled(env)) {
+        return 2;
+    }
+
     return 1;
 }
 
@@ -83,7 +90,8 @@  void raise_exception(CPUARMState *env, uint32_t excp, uint32_t syndrome,
 {
     int target_el = cur_or_target_el;
     if (cur_or_target_el <= 1) {
-        target_el = exception_target_el(env, cur_or_target_el, &syndrome);
+        target_el = exception_target_el(env, cur_or_target_el,
+                                        &syndrome, false);
     }
     raise_exception_int(env, excp, syndrome, target_el);
 }
diff --git a/target/arm/tlb_helper.c b/target/arm/tlb_helper.c
index 573e18f830..3bf4107faa 100644
--- a/target/arm/tlb_helper.c
+++ b/target/arm/tlb_helper.c
@@ -90,7 +90,7 @@  void arm_deliver_fault(ARMCPU *cpu, vaddr addr,
     uint32_t syn, exc, fsr, fsc;
 
     cur_el = arm_current_el(env);
-    target_el = exception_target_el(env, cur_el, NULL);
+    target_el = exception_target_el(env, cur_el, NULL, false);
 
     if (fi->stage2) {
         target_el = 2;
@@ -141,7 +141,7 @@  void arm_cpu_do_unaligned_access(CPUState *cs, vaddr vaddr,
 void helper_exception_pc_alignment(CPUARMState *env, target_ulong pc)
 {
     ARMMMUFaultInfo fi = { .type = ARMFault_Alignment };
-    int target_el = exception_target_el(env, arm_current_el(env), NULL);
+    int target_el = exception_target_el(env, arm_current_el(env), NULL, false);
     int mmu_idx = cpu_mmu_index(env, true);
     uint32_t fsc;