From 602f17920e422e2b8d3ce485e56066a97b74e723 Mon Sep 17 00:00:00 2001
From: eperezma <eperezma@redhat.com>
Date: Tue, 12 Jan 2021 14:36:29 -0500
Subject: [PATCH 05/17] hw/arm/smmu: Introduce SMMUTLBEntry for PTW and IOTLB
 value
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RH-Author: eperezma <eperezma@redhat.com>
Message-id: <20210112143638.374060-5-eperezma@redhat.com>
Patchwork-id: 100597
O-Subject: [RHEL-8.4.0 qemu-kvm PATCH v2 04/13] hw/arm/smmu: Introduce SMMUTLBEntry for PTW and IOTLB value
Bugzilla: 1843852
RH-Acked-by: Xiao Wang <jasowang@redhat.com>
RH-Acked-by: Peter Xu <peterx@redhat.com>
RH-Acked-by: Auger Eric <eric.auger@redhat.com>

From: Eric Auger <eric.auger@redhat.com>

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>
(cherry picked from commit a7550158556b7fc2f2baaecf9092499c6687b160)
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
 hw/arm/smmu-common.c         | 32 +++++++++++++++++---------------
 hw/arm/smmuv3.c              | 10 +++++-----
 include/hw/arm/smmu-common.h | 12 +++++++++---
 3 files changed, 31 insertions(+), 23 deletions(-)

diff --git a/hw/arm/smmu-common.c b/hw/arm/smmu-common.c
index 0b89c9fbbbc..06e9e38b007 100644
--- 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)
@@ -217,7 +217,7 @@ 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
@@ -227,7 +227,7 @@ 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;
@@ -247,8 +247,8 @@ 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);
@@ -299,14 +299,16 @@ 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;
 }
 
@@ -322,7 +324,7 @@ 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 34dea4df4da..ad8212779d3 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -614,7 +614,7 @@ 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 = {
@@ -664,7 +664,7 @@ 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;
@@ -677,7 +677,7 @@ 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);
@@ -731,9 +731,9 @@ 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 bceba40885c..277923bdc0a 100644
--- 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);
-- 
2.27.0

