hw/arm/smmuv3: Get prepared for range invalidation

Enhance the smmu_iotlb_inv_iova() helper with range invalidation.
This uses the new fields passed in the NH_VA and NH_VAA commands:
the size of the range, the level and the granule.

As NH_VA and NH_VAA both use those fields, their decoding and
handling is factorized in a new smmuv3_s1_range_inval() helper.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20200728150815.11446-8-eric.auger@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 41 insertions, 23 deletions

diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index e4a2cea7ad..89ab11fc36 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -785,42 +785,49 @@ epilogue:
  * @n: notifier to be called
  * @asid: address space ID or negative value if we don't care
  * @iova: iova
+ * @tg: translation granule (if communicated through range invalidation)
+ * @num_pages: number of @granule sized pages (if tg != 0), otherwise 1
  */
 static void smmuv3_notify_iova(IOMMUMemoryRegion *mr,
                                IOMMUNotifier *n,
-                               int asid,
-                               dma_addr_t iova)
+                               int asid, dma_addr_t iova,
+                               uint8_t tg, uint64_t num_pages)
 {
     SMMUDevice *sdev = container_of(mr, SMMUDevice, iommu);
-    SMMUEventInfo event = {.inval_ste_allowed = true};
-    SMMUTransTableInfo *tt;
-    SMMUTransCfg *cfg;
     IOMMUTLBEntry entry;
+    uint8_t granule = tg;
 
-    cfg = smmuv3_get_config(sdev, &event);
-    if (!cfg) {
-        return;
-    }
+    if (!tg) {
+        SMMUEventInfo event = {.inval_ste_allowed = true};
+        SMMUTransCfg *cfg = smmuv3_get_config(sdev, &event);
+        SMMUTransTableInfo *tt;
 
-    if (asid >= 0 && cfg->asid != asid) {
-        return;
-    }
+        if (!cfg) {
+            return;
+        }
 
-    tt = select_tt(cfg, iova);
-    if (!tt) {
-        return;
+        if (asid >= 0 && cfg->asid != asid) {
+            return;
+        }
+
+        tt = select_tt(cfg, iova);
+        if (!tt) {
+            return;
+        }
+        granule = tt->granule_sz;
     }
 
     entry.target_as = &address_space_memory;
     entry.iova = iova;
-    entry.addr_mask = (1 << tt->granule_sz) - 1;
+    entry.addr_mask = num_pages * (1 << granule) - 1;
     entry.perm = IOMMU_NONE;
 
     memory_region_notify_one(n, &entry);
 }
 
-/* invalidate an asid/iova tuple in all mr's */
-static void smmuv3_inv_notifiers_iova(SMMUState *s, int asid, dma_addr_t iova)
+/* invalidate an asid/iova range tuple in all mr's */
+static void smmuv3_inv_notifiers_iova(SMMUState *s, int asid, dma_addr_t iova,
+                                      uint8_t tg, uint64_t num_pages)
 {
     SMMUDevice *sdev;
 
@@ -828,28 +835,39 @@ static void smmuv3_inv_notifiers_iova(SMMUState *s, int asid, dma_addr_t iova)
         IOMMUMemoryRegion *mr = &sdev->iommu;
         IOMMUNotifier *n;
 
-        trace_smmuv3_inv_notifiers_iova(mr->parent_obj.name, asid, iova);
+        trace_smmuv3_inv_notifiers_iova(mr->parent_obj.name, asid, iova,
+                                        tg, num_pages);
 
         IOMMU_NOTIFIER_FOREACH(n, mr) {
-            smmuv3_notify_iova(mr, n, asid, iova);
+            smmuv3_notify_iova(mr, n, asid, iova, tg, num_pages);
         }
     }
 }
 
 static void smmuv3_s1_range_inval(SMMUState *s, Cmd *cmd)
 {
+    uint8_t scale = 0, num = 0, ttl = 0;
     dma_addr_t addr = CMD_ADDR(cmd);
     uint8_t type = CMD_TYPE(cmd);
     uint16_t vmid = CMD_VMID(cmd);
     bool leaf = CMD_LEAF(cmd);
+    uint8_t tg = CMD_TG(cmd);
+    hwaddr num_pages = 1;
     int asid = -1;
 
+    if (tg) {
+        scale = CMD_SCALE(cmd);
+        num = CMD_NUM(cmd);
+        ttl = CMD_TTL(cmd);
+        num_pages = (num + 1) * (1 << (scale));
+    }
+
     if (type == SMMU_CMD_TLBI_NH_VA) {
         asid = CMD_ASID(cmd);
     }
-    trace_smmuv3_s1_range_inval(vmid, asid, addr, leaf);
-    smmuv3_inv_notifiers_iova(s, asid, addr);
-    smmu_iotlb_inv_iova(s, asid, addr);
+    trace_smmuv3_s1_range_inval(vmid, asid, addr, tg, num_pages, ttl, leaf);
+    smmuv3_inv_notifiers_iova(s, asid, addr, tg, num_pages);
+    smmu_iotlb_inv_iova(s, asid, addr, tg, num_pages, ttl);
 }
 
 static int smmuv3_cmdq_consume(SMMUv3State *s)