hw/arm/smmu: Introduce SMMUTLBEntry for PTW and IOTLB value

Introduce a specialized SMMUTLBEntry to store the result of
the PTW and cache in the IOTLB. This structure extends the
generic IOMMUTLBEntry struct with the level of the entry and
the granule size.

Those latter will be useful when implementing range invalidation.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20200728150815.11446-5-eric.auger@redhat.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 7dc8541e8b4f1e728c702f3169874738dfdd6030..398e958bb44ece495a834d8af7d2f6f504eebf86 100644 (file)
--- a/hw/arm/smmu-common.c
+++ b/hw/arm/smmu-common.c
@@ -64,11 +64,11 @@ SMMUIOTLBKey smmu_get_iotlb_key(uint16_t asid, uint64_t iova)
     return key;
 }
 
-IOMMUTLBEntry *smmu_iotlb_lookup(SMMUState *bs, SMMUTransCfg *cfg,
-                                 hwaddr iova)
+SMMUTLBEntry *smmu_iotlb_lookup(SMMUState *bs, SMMUTransCfg *cfg,
+                                hwaddr iova)
 {
     SMMUIOTLBKey key = smmu_get_iotlb_key(cfg->asid, iova);
-    IOMMUTLBEntry *entry = g_hash_table_lookup(bs->iotlb, &key);
+    SMMUTLBEntry *entry = g_hash_table_lookup(bs->iotlb, &key);
 
     if (entry) {
         cfg->iotlb_hits++;
@@ -86,7 +86,7 @@ IOMMUTLBEntry *smmu_iotlb_lookup(SMMUState *bs, SMMUTransCfg *cfg,
     return entry;
 }
 
-void smmu_iotlb_insert(SMMUState *bs, SMMUTransCfg *cfg, IOMMUTLBEntry *entry)
+void smmu_iotlb_insert(SMMUState *bs, SMMUTransCfg *cfg, SMMUTLBEntry *new)
 {
     SMMUIOTLBKey *key = g_new0(SMMUIOTLBKey, 1);
 
@@ -94,9 +94,9 @@ void smmu_iotlb_insert(SMMUState *bs, SMMUTransCfg *cfg, IOMMUTLBEntry *entry)
         smmu_iotlb_inv_all(bs);
     }
 
-    *key = smmu_get_iotlb_key(cfg->asid, entry->iova);
-    trace_smmu_iotlb_insert(cfg->asid, entry->iova);
-    g_hash_table_insert(bs->iotlb, key, entry);
+    *key = smmu_get_iotlb_key(cfg->asid, new->entry.iova);
+    trace_smmu_iotlb_insert(cfg->asid, new->entry.iova);
+    g_hash_table_insert(bs->iotlb, key, new);
 }
 
 inline void smmu_iotlb_inv_all(SMMUState *s)
@@ -216,7 +216,7 @@ SMMUTransTableInfo *select_tt(SMMUTransCfg *cfg, dma_addr_t iova)
  * @cfg: translation config
  * @iova: iova to translate
  * @perm: access type
- * @tlbe: IOMMUTLBEntry (out)
+ * @tlbe: SMMUTLBEntry (out)
  * @info: handle to an error info
  *
  * Return 0 on success, < 0 on error. In case of error, @info is filled
@@ -226,7 +226,7 @@ SMMUTransTableInfo *select_tt(SMMUTransCfg *cfg, dma_addr_t iova)
  */
 static int smmu_ptw_64(SMMUTransCfg *cfg,
                        dma_addr_t iova, IOMMUAccessFlags perm,
-                       IOMMUTLBEntry *tlbe, SMMUPTWEventInfo *info)
+                       SMMUTLBEntry *tlbe, SMMUPTWEventInfo *info)
 {
     dma_addr_t baseaddr, indexmask;
     int stage = cfg->stage;
@@ -246,8 +246,8 @@ static int smmu_ptw_64(SMMUTransCfg *cfg,
     baseaddr = extract64(tt->ttb, 0, 48);
     baseaddr &= ~indexmask;
 
-    tlbe->iova = iova;
-    tlbe->addr_mask = (1 << granule_sz) - 1;
+    tlbe->entry.iova = iova;
+    tlbe->entry.addr_mask = (1 << granule_sz) - 1;
 
     while (level <= 3) {
         uint64_t subpage_size = 1ULL << level_shift(level, granule_sz);
@@ -298,14 +298,16 @@ static int smmu_ptw_64(SMMUTransCfg *cfg,
             goto error;
         }
 
-        tlbe->translated_addr = gpa + (iova & mask);
-        tlbe->perm = PTE_AP_TO_PERM(ap);
+        tlbe->entry.translated_addr = gpa + (iova & mask);
+        tlbe->entry.perm = PTE_AP_TO_PERM(ap);
+        tlbe->level = level;
+        tlbe->granule = granule_sz;
         return 0;
     }
     info->type = SMMU_PTW_ERR_TRANSLATION;
 
 error:
-    tlbe->perm = IOMMU_NONE;
+    tlbe->entry.perm = IOMMU_NONE;
     return -EINVAL;
 }
 
@@ -321,7 +323,7 @@ error:
  * return 0 on success
  */
 inline int smmu_ptw(SMMUTransCfg *cfg, dma_addr_t iova, IOMMUAccessFlags perm,
-             IOMMUTLBEntry *tlbe, SMMUPTWEventInfo *info)
+                    SMMUTLBEntry *tlbe, SMMUPTWEventInfo *info)
 {
     if (!cfg->aa64) {
         /*

diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index cd2a2e7e1482c5216adc6337092e0f139dbf1657..db74d27add57a1aad78017bae5e90e47c8c7c0fb 100644 (file)
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -626,7 +626,7 @@ static IOMMUTLBEntry smmuv3_translate(IOMMUMemoryRegion *mr, hwaddr addr,
     SMMUTranslationStatus status;
     SMMUState *bs = ARM_SMMU(s);
     uint64_t page_mask, aligned_addr;
-    IOMMUTLBEntry *cached_entry = NULL;
+    SMMUTLBEntry *cached_entry = NULL;
     SMMUTransTableInfo *tt;
     SMMUTransCfg *cfg = NULL;
     IOMMUTLBEntry entry = {
@@ -676,7 +676,7 @@ static IOMMUTLBEntry smmuv3_translate(IOMMUMemoryRegion *mr, hwaddr addr,
 
     cached_entry = smmu_iotlb_lookup(bs, cfg, aligned_addr);
     if (cached_entry) {
-        if ((flag & IOMMU_WO) && !(cached_entry->perm & IOMMU_WO)) {
+        if ((flag & IOMMU_WO) && !(cached_entry->entry.perm & IOMMU_WO)) {
             status = SMMU_TRANS_ERROR;
             if (event.record_trans_faults) {
                 event.type = SMMU_EVT_F_PERMISSION;
@@ -689,7 +689,7 @@ static IOMMUTLBEntry smmuv3_translate(IOMMUMemoryRegion *mr, hwaddr addr,
         goto epilogue;
     }
 
-    cached_entry = g_new0(IOMMUTLBEntry, 1);
+    cached_entry = g_new0(SMMUTLBEntry, 1);
 
     if (smmu_ptw(cfg, aligned_addr, flag, cached_entry, &ptw_info)) {
         g_free(cached_entry);
@@ -743,9 +743,9 @@ epilogue:
     switch (status) {
     case SMMU_TRANS_SUCCESS:
         entry.perm = flag;
-        entry.translated_addr = cached_entry->translated_addr +
+        entry.translated_addr = cached_entry->entry.translated_addr +
                                     (addr & page_mask);
-        entry.addr_mask = cached_entry->addr_mask;
+        entry.addr_mask = cached_entry->entry.addr_mask;
         trace_smmuv3_translate_success(mr->parent_obj.name, sid, addr,
                                        entry.translated_addr, entry.perm);
         break;

diff --git a/include/hw/arm/smmu-common.h b/include/hw/arm/smmu-common.h
index 5f9f3535d2a8b17c9bc7f7d252b61da8f0e7d30e..79c2c6486adb1e105f825078b1c52b6709118670 100644 (file)
--- a/include/hw/arm/smmu-common.h
+++ b/include/hw/arm/smmu-common.h
@@ -52,6 +52,12 @@ typedef struct SMMUTransTableInfo {
     uint8_t granule_sz;        /* granule page shift */
 } SMMUTransTableInfo;
 
+typedef struct SMMUTLBEntry {
+    IOMMUTLBEntry entry;
+    uint8_t level;
+    uint8_t granule;
+} SMMUTLBEntry;
+
 /*
  * Generic structure populated by derived SMMU devices
  * after decoding the configuration information and used as
@@ -140,7 +146,7 @@ static inline uint16_t smmu_get_sid(SMMUDevice *sdev)
  * pair, according to @cfg translation config
  */
 int smmu_ptw(SMMUTransCfg *cfg, dma_addr_t iova, IOMMUAccessFlags perm,
-             IOMMUTLBEntry *tlbe, SMMUPTWEventInfo *info);
+             SMMUTLBEntry *tlbe, SMMUPTWEventInfo *info);
 
 /**
  * select_tt - compute which translation table shall be used according to
@@ -153,8 +159,8 @@ IOMMUMemoryRegion *smmu_iommu_mr(SMMUState *s, uint32_t sid);
 
 #define SMMU_IOTLB_MAX_SIZE 256
 
-IOMMUTLBEntry *smmu_iotlb_lookup(SMMUState *bs, SMMUTransCfg *cfg, hwaddr iova);
-void smmu_iotlb_insert(SMMUState *bs, SMMUTransCfg *cfg, IOMMUTLBEntry *entry);
+SMMUTLBEntry *smmu_iotlb_lookup(SMMUState *bs, SMMUTransCfg *cfg, hwaddr iova);
+void smmu_iotlb_insert(SMMUState *bs, SMMUTransCfg *cfg, SMMUTLBEntry *entry);
 SMMUIOTLBKey smmu_get_iotlb_key(uint16_t asid, uint64_t iova);
 void smmu_iotlb_inv_all(SMMUState *s);
 void smmu_iotlb_inv_asid(SMMUState *s, uint16_t asid);