hw/arm/smmu: Fix IPA for stage-2 events

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>

diff --git a/hw/arm/smmu-common.c b/hw/arm/smmu-common.c
index e81b684d06c0faa03fedc380673ad52cec364219..e8cdbcd8aefc1c39b3c00da473cba01938006e40 100644 (file)
--- 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 445e04ddf7cabe92b426562b82636ba3cf8734e4..cab545a0b466de2ccd4e22e380073711d28f928b 100644 (file)
--- 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;