[RFC PATCH v3 02/18] hw/arm/smmu: Fix IPA for stage-2 events

[Mostafa Saleh]

For the following events (ARM IHI 0070 F.b - 7.3 Event records):
- F_TRANSLATION
- F_ACCESS
- F_PERMISSION
- F_ADDR_SIZE

If fault occurs at stage 2, S2 == 1 and:
  - If translating an IPA for a transaction (whether by input to
    stage 2-only configuration, or after successful stage 1 translation),
    CLASS == IN, and IPA is provided.

However, this was not implemented correctly, as for stage 2, we Qemu
only sets the  S2 bit but not the IPA.

This field has the same bits as FetchAddr in F_WALK_EABT which is
populated correctly, so we don’t change that.
The population of this field should be done from the walker as the IPA address
wouldn't be known in case of nesting.

For stage 1, the spec says:
  If fault occurs at stage 1, S2 == 0 and:
  CLASS == IN, IPA is UNKNOWN.

So, no need to set it to for stage 1, as ptw_info is initialised by zero in
smmuv3_translate().

Signed-off-by: Mostafa Saleh <smostafa@google.com>
---
 hw/arm/smmu-common.c | 10 ++++++----
 hw/arm/smmuv3.c      |  4 ++++
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/hw/arm/smmu-common.c b/hw/arm/smmu-common.c
index eb2356bc35..8a8c718e6b 100644
--- a/hw/arm/smmu-common.c
+++ b/hw/arm/smmu-common.c
@@ -448,7 +448,7 @@ static int smmu_ptw_64_s2(SMMUTransCfg *cfg,
      */
     if (ipa >= (1ULL << inputsize)) {
         info->type = SMMU_PTW_ERR_TRANSLATION;
-        goto error;
+        goto error_ipa;
     }
 
     while (level < VMSA_LEVELS) {
@@ -494,13 +494,13 @@ static int smmu_ptw_64_s2(SMMUTransCfg *cfg,
          */
         if (!PTE_AF(pte) && !cfg->s2cfg.affd) {
             info->type = SMMU_PTW_ERR_ACCESS;
-            goto error;
+            goto error_ipa;
         }
 
         s2ap = PTE_AP(pte);
         if (is_permission_fault_s2(s2ap, perm)) {
             info->type = SMMU_PTW_ERR_PERMISSION;
-            goto error;
+            goto error_ipa;
         }
 
         /*
@@ -509,7 +509,7 @@ static int smmu_ptw_64_s2(SMMUTransCfg *cfg,
          */
         if (gpa >= (1ULL << cfg->s2cfg.eff_ps)) {
             info->type = SMMU_PTW_ERR_ADDR_SIZE;
-            goto error;
+            goto error_ipa;
         }
 
         tlbe->entry.translated_addr = gpa;
@@ -522,6 +522,8 @@ static int smmu_ptw_64_s2(SMMUTransCfg *cfg,
     }
     info->type = SMMU_PTW_ERR_TRANSLATION;
 
+error_ipa:
+    info->addr = ipa;
 error:
     info->stage = 2;
     tlbe->entry.perm = IOMMU_NONE;
diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index 2d1e0d55ec..9dd3ea48e4 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -949,6 +949,7 @@ static IOMMUTLBEntry smmuv3_translate(IOMMUMemoryRegion 
*mr, hwaddr addr,
             if (PTW_RECORD_FAULT(cfg)) {
                 event.type = SMMU_EVT_F_TRANSLATION;
                 event.u.f_translation.addr = addr;
+                event.u.f_translation.addr2 = ptw_info.addr;
                 event.u.f_translation.rnw = flag & 0x1;
             }
             break;
@@ -956,6 +957,7 @@ static IOMMUTLBEntry smmuv3_translate(IOMMUMemoryRegion 
*mr, hwaddr addr,
             if (PTW_RECORD_FAULT(cfg)) {
                 event.type = SMMU_EVT_F_ADDR_SIZE;
                 event.u.f_addr_size.addr = addr;
+                event.u.f_addr_size.addr2 = ptw_info.addr;
                 event.u.f_addr_size.rnw = flag & 0x1;
             }
             break;
@@ -963,6 +965,7 @@ static IOMMUTLBEntry smmuv3_translate(IOMMUMemoryRegion 
*mr, hwaddr addr,
             if (PTW_RECORD_FAULT(cfg)) {
                 event.type = SMMU_EVT_F_ACCESS;
                 event.u.f_access.addr = addr;
+                event.u.f_access.addr2 = ptw_info.addr;
                 event.u.f_access.rnw = flag & 0x1;
             }
             break;
@@ -970,6 +973,7 @@ static IOMMUTLBEntry smmuv3_translate(IOMMUMemoryRegion 
*mr, hwaddr addr,
             if (PTW_RECORD_FAULT(cfg)) {
                 event.type = SMMU_EVT_F_PERMISSION;
                 event.u.f_permission.addr = addr;
+                event.u.f_permission.addr2 = ptw_info.addr;
                 event.u.f_permission.rnw = flag & 0x1;
             }
             break;
-- 
2.44.0.769.g3c40516874-goog