[Qemu-devel] [PULL 31/36] target/arm: Allow deliver_fault() caller to specify EA bit

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

For external aborts, we will want to be able to specify the EA
(external abort type) bit in the syndrome field.  Allow callers of
deliver_fault() to do that by adding a field to ARMMMUFaultInfo which
we use when constructing the syndrome values.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---
 target/arm/internals.h |  2 ++
 target/arm/op_helper.c | 10 +++++-----
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/target/arm/internals.h b/target/arm/internals.h
index bb06946..461f558 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -448,12 +448,14 @@ void arm_handle_psci_call(ARMCPU *cpu);
  * @s2addr: Address that caused a fault at stage 2
  * @stage2: True if we faulted at stage 2
  * @s1ptw: True if we faulted at stage 2 while doing a stage 1 page-table walk
+ * @ea: True if we should set the EA (external abort type) bit in syndrome
  */
 typedef struct ARMMMUFaultInfo ARMMMUFaultInfo;
 struct ARMMMUFaultInfo {
     target_ulong s2addr;
     bool stage2;
     bool s1ptw;
+    bool ea;
 };
 
 /* Do a page table walk and add page to TLB if possible */
diff --git a/target/arm/op_helper.c b/target/arm/op_helper.c
index 6114597..8f6db80 100644
--- a/target/arm/op_helper.c
+++ b/target/arm/op_helper.c
@@ -80,7 +80,7 @@ uint32_t HELPER(neon_tbl)(CPUARMState *env, uint32_t ireg, uint32_t def,
 
 static inline uint32_t merge_syn_data_abort(uint32_t template_syn,
                                             unsigned int target_el,
-                                            bool same_el,
+                                            bool same_el, bool ea,
                                             bool s1ptw, bool is_write,
                                             int fsc)
 {
@@ -99,7 +99,7 @@ static inline uint32_t merge_syn_data_abort(uint32_t template_syn,
      */
     if (!(template_syn & ARM_EL_ISV) || target_el != 2 || s1ptw) {
         syn = syn_data_abort_no_iss(same_el,
-                                    0, 0, s1ptw, is_write, fsc);
+                                    ea, 0, s1ptw, is_write, fsc);
     } else {
         /* Fields: IL, ISV, SAS, SSE, SRT, SF and AR come from the template
          * syndrome created at translation time.
@@ -107,7 +107,7 @@ static inline uint32_t merge_syn_data_abort(uint32_t template_syn,
          */
         syn = syn_data_abort_with_iss(same_el,
                                       0, 0, 0, 0, 0,
-                                      0, 0, s1ptw, is_write, fsc,
+                                      ea, 0, s1ptw, is_write, fsc,
                                       false);
         /* Merge the runtime syndrome with the template syndrome.  */
         syn |= template_syn;
@@ -141,11 +141,11 @@ static void deliver_fault(ARMCPU *cpu, vaddr addr, MMUAccessType access_type,
     }
 
     if (access_type == MMU_INST_FETCH) {
-        syn = syn_insn_abort(same_el, 0, fi->s1ptw, fsc);
+        syn = syn_insn_abort(same_el, fi->ea, fi->s1ptw, fsc);
         exc = EXCP_PREFETCH_ABORT;
     } else {
         syn = merge_syn_data_abort(env->exception.syndrome, target_el,
-                                   same_el, fi->s1ptw,
+                                   same_el, fi->ea, fi->s1ptw,
                                    access_type == MMU_DATA_STORE,
                                    fsc);
         if (access_type == MMU_DATA_STORE
-- 
2.7.4