[PULL 05/26] hw/arm/smmu: Fix IPA for stage-2 events

[Peter Maydell]

From: Mostafa Saleh <smostafa@google.com>

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.

At the moment only CLASS == IN is used which indicates input
translation.

However, this was not implemented correctly, as for stage 2, the code
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 setting 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().

Fixes: e703f7076a “hw/arm/smmuv3: Add page table walk for stage-2”
Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Mostafa Saleh <smostafa@google.com>
Message-id: 20240715084519.1189624-3-smostafa@google.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 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 e81b684d06c..e8cdbcd8aef 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 445e04ddf7c..cab545a0b46 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;
-- 
2.34.1