[PATCH v3 6/9] target/arm: Enable TTBCR_EAE for ARMv8-R AArch32

[<tobias.roehmel@rwth-aachen.de>]

From: Tobias Röhmel <tobias.roehmel@rwth-aachen.de>

ARMv8-R AArch32 CPUs behave as if TTBCR.EAE is always 1 even
tough they don't have the TTBCR register.
See ARM Architecture Reference Manual Supplement - ARMv8, for the ARMv8-R
AArch32 architecture profile Version:A.c section C1.2.

Signed-off-by: Tobias Röhmel <tobias.roehmel@rwth-aachen.de>
---
 target/arm/debug_helper.c | 3 ++-
 target/arm/internals.h    | 3 ++-
 target/arm/tlb_helper.c   | 3 ++-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/target/arm/debug_helper.c b/target/arm/debug_helper.c
index b18a6bd3a2..44b1e32974 100644
--- a/target/arm/debug_helper.c
+++ b/target/arm/debug_helper.c
@@ -434,7 +434,8 @@ static uint32_t arm_debug_exception_fsr(CPUARMState *env)
         using_lpae = true;
     } else {
         if (arm_feature(env, ARM_FEATURE_LPAE) &&
-            (env->cp15.tcr_el[target_el].raw_tcr & TTBCR_EAE)) {
+            ((env->cp15.tcr_el[target_el].raw_tcr & TTBCR_EAE)
+            || arm_feature(env, ARM_FEATURE_V8_R))) {
             using_lpae = true;
         }
     }
diff --git a/target/arm/internals.h b/target/arm/internals.h
index b03049d920..e2a2b03d41 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -254,7 +254,8 @@ static inline bool extended_addresses_enabled(CPUARMState *env)
 {
     TCR *tcr = &env->cp15.tcr_el[arm_is_secure(env) ? 3 : 1];
     return arm_el_is_aa64(env, 1) ||
-           (arm_feature(env, ARM_FEATURE_LPAE) && (tcr->raw_tcr & TTBCR_EAE));
+           (arm_feature(env, ARM_FEATURE_LPAE) && ((tcr->raw_tcr & TTBCR_EAE)
+           || arm_feature(env, ARM_FEATURE_V8_R)));
 }
 
 /* Update a QEMU watchpoint based on the information the guest has set in the
diff --git a/target/arm/tlb_helper.c b/target/arm/tlb_helper.c
index 7d8a86b3c4..891326edb8 100644
--- a/target/arm/tlb_helper.c
+++ b/target/arm/tlb_helper.c
@@ -20,7 +20,8 @@ bool regime_using_lpae_format(CPUARMState *env, ARMMMUIdx mmu_idx)
         return true;
     }
     if (arm_feature(env, ARM_FEATURE_LPAE)
-        && (regime_tcr(env, mmu_idx)->raw_tcr & TTBCR_EAE)) {
+        && ((regime_tcr(env, mmu_idx)->raw_tcr & TTBCR_EAE)
+        || arm_feature(env, ARM_FEATURE_V8_R))) {
         return true;
     }
     return false;
-- 
2.25.1