[PULL 19/26] hw/arm/smmuv3: Handle translation faults according to SMMUPTWEventInfo

[Peter Maydell]

From: Mostafa Saleh <smostafa@google.com>

Previously, to check if faults are enabled, it was sufficient to check
the current stage of translation and check the corresponding
record_faults flag.

However, with nesting, it is possible for stage-1 (nested) translation
to trigger a stage-2 fault, so we check SMMUPTWEventInfo as it would
have the correct stage set from the page table walk.

Signed-off-by: Mostafa Saleh <smostafa@google.com>
Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20240715084519.1189624-17-smostafa@google.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/arm/smmuv3.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index a3cb30501e6..2d61637aed5 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -34,9 +34,10 @@
 #include "smmuv3-internal.h"
 #include "smmu-internal.h"
 
-#define PTW_RECORD_FAULT(cfg)   (((cfg)->stage == SMMU_STAGE_1) ? \
-                                 (cfg)->record_faults : \
-                                 (cfg)->s2cfg.record_faults)
+#define PTW_RECORD_FAULT(ptw_info, cfg) (((ptw_info).stage == SMMU_STAGE_1 && \
+                                        (cfg)->record_faults) || \
+                                        ((ptw_info).stage == SMMU_STAGE_2 && \
+                                        (cfg)->s2cfg.record_faults))
 
 /**
  * smmuv3_trigger_irq - pulse @irq if enabled and update
@@ -933,7 +934,7 @@ static SMMUTranslationStatus 
smmuv3_do_translate(SMMUv3State *s, hwaddr addr,
             event->u.f_walk_eabt.addr2 = ptw_info.addr;
             break;
         case SMMU_PTW_ERR_TRANSLATION:
-            if (PTW_RECORD_FAULT(cfg)) {
+            if (PTW_RECORD_FAULT(ptw_info, cfg)) {
                 event->type = SMMU_EVT_F_TRANSLATION;
                 event->u.f_translation.addr2 = ptw_info.addr;
                 event->u.f_translation.class = class;
@@ -941,7 +942,7 @@ static SMMUTranslationStatus 
smmuv3_do_translate(SMMUv3State *s, hwaddr addr,
             }
             break;
         case SMMU_PTW_ERR_ADDR_SIZE:
-            if (PTW_RECORD_FAULT(cfg)) {
+            if (PTW_RECORD_FAULT(ptw_info, cfg)) {
                 event->type = SMMU_EVT_F_ADDR_SIZE;
                 event->u.f_addr_size.addr2 = ptw_info.addr;
                 event->u.f_addr_size.class = class;
@@ -949,7 +950,7 @@ static SMMUTranslationStatus 
smmuv3_do_translate(SMMUv3State *s, hwaddr addr,
             }
             break;
         case SMMU_PTW_ERR_ACCESS:
-            if (PTW_RECORD_FAULT(cfg)) {
+            if (PTW_RECORD_FAULT(ptw_info, cfg)) {
                 event->type = SMMU_EVT_F_ACCESS;
                 event->u.f_access.addr2 = ptw_info.addr;
                 event->u.f_access.class = class;
@@ -957,7 +958,7 @@ static SMMUTranslationStatus 
smmuv3_do_translate(SMMUv3State *s, hwaddr addr,
             }
             break;
         case SMMU_PTW_ERR_PERMISSION:
-            if (PTW_RECORD_FAULT(cfg)) {
+            if (PTW_RECORD_FAULT(ptw_info, cfg)) {
                 event->type = SMMU_EVT_F_PERMISSION;
                 event->u.f_permission.addr2 = ptw_info.addr;
                 event->u.f_permission.class = class;
-- 
2.34.1