diff mbox series

[for-4.1] hw/arm/smmuv3: Remove SMMUNotifierNode

Message ID 20190409160219.19026-1-eric.auger@redhat.com
State New
Headers show
Series [for-4.1] hw/arm/smmuv3: Remove SMMUNotifierNode | expand

Commit Message

Eric Auger April 9, 2019, 4:02 p.m. UTC 
The SMMUNotifierNode struct is not necessary and brings extra
complexity so let's remove it. We now directly track the SMMUDevices
which have registered IOMMU MR notifiers.

This is inspired from the same transformation on intel-iommu
done in commit b4a4ba0d68f50f218ee3957b6638dbee32a5eeef
("intel-iommu: remove IntelIOMMUNotifierNode")

Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 hw/arm/smmu-common.c         |  6 +++---
 hw/arm/smmuv3.c              | 28 +++++++---------------------
 include/hw/arm/smmu-common.h |  8 ++------
 3 files changed, 12 insertions(+), 30 deletions(-)

Comments

Peter Xu April 10, 2019, 12:16 a.m. UTC | #1 
On Tue, Apr 09, 2019 at 06:02:19PM +0200, Eric Auger wrote:
> The SMMUNotifierNode struct is not necessary and brings extra
> complexity so let's remove it. We now directly track the SMMUDevices
> which have registered IOMMU MR notifiers.
> 
> This is inspired from the same transformation on intel-iommu
> done in commit b4a4ba0d68f50f218ee3957b6638dbee32a5eeef
> ("intel-iommu: remove IntelIOMMUNotifierNode")
> 
> Signed-off-by: Eric Auger <eric.auger@redhat.com>

Reviewed-by: Peter Xu <peterx@redhat.com>
Peter Maydell April 11, 2019, 3:33 p.m. UTC | #2 
On Wed, 10 Apr 2019 at 01:16, Peter Xu <peterx@redhat.com> wrote:
>
> On Tue, Apr 09, 2019 at 06:02:19PM +0200, Eric Auger wrote:
> > The SMMUNotifierNode struct is not necessary and brings extra
> > complexity so let's remove it. We now directly track the SMMUDevices
> > which have registered IOMMU MR notifiers.
> >
> > This is inspired from the same transformation on intel-iommu
> > done in commit b4a4ba0d68f50f218ee3957b6638dbee32a5eeef
> > ("intel-iommu: remove IntelIOMMUNotifierNode")
> >
> > Signed-off-by: Eric Auger <eric.auger@redhat.com>
>
> Reviewed-by: Peter Xu <peterx@redhat.com>

Thanks; applied to target-arm.next for 4.1.

-- PMM
diff mbox series

Patch

diff --git a/hw/arm/smmu-common.c b/hw/arm/smmu-common.c
index bbf4b8721a..e94be6db6c 100644
--- a/hw/arm/smmu-common.c
+++ b/hw/arm/smmu-common.c
@@ -412,10 +412,10 @@  inline void smmu_inv_notifiers_mr(IOMMUMemoryRegion *mr)
 /* Unmap all notifiers of all mr's */
 void smmu_inv_notifiers_all(SMMUState *s)
 {
-    SMMUNotifierNode *node;
+    SMMUDevice *sdev;
 
-    QLIST_FOREACH(node, &s->notifiers_list, next) {
-        smmu_inv_notifiers_mr(&node->sdev->iommu);
+    QLIST_FOREACH(sdev, &s->devices_with_notifiers, next) {
+        smmu_inv_notifiers_mr(&sdev->iommu);
     }
 }
 
diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index 8c4e99fecc..fd8ec7860e 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -828,10 +828,10 @@  static void smmuv3_notify_iova(IOMMUMemoryRegion *mr,
 /* invalidate an asid/iova tuple in all mr's */
 static void smmuv3_inv_notifiers_iova(SMMUState *s, int asid, dma_addr_t iova)
 {
-    SMMUNotifierNode *node;
+    SMMUDevice *sdev;
 
-    QLIST_FOREACH(node, &s->notifiers_list, next) {
-        IOMMUMemoryRegion *mr = &node->sdev->iommu;
+    QLIST_FOREACH(sdev, &s->devices_with_notifiers, next) {
+        IOMMUMemoryRegion *mr = &sdev->iommu;
         IOMMUNotifier *n;
 
         trace_smmuv3_inv_notifiers_iova(mr->parent_obj.name, asid, iova);
@@ -1472,8 +1472,6 @@  static void smmuv3_notify_flag_changed(IOMMUMemoryRegion *iommu,
     SMMUDevice *sdev = container_of(iommu, SMMUDevice, iommu);
     SMMUv3State *s3 = sdev->smmu;
     SMMUState *s = &(s3->smmu_state);
-    SMMUNotifierNode *node = NULL;
-    SMMUNotifierNode *next_node = NULL;
 
     if (new & IOMMU_NOTIFIER_MAP) {
         int bus_num = pci_bus_num(sdev->bus);
@@ -1485,22 +1483,10 @@  static void smmuv3_notify_flag_changed(IOMMUMemoryRegion *iommu,
 
     if (old == IOMMU_NOTIFIER_NONE) {
         trace_smmuv3_notify_flag_add(iommu->parent_obj.name);
-        node = g_malloc0(sizeof(*node));
-        node->sdev = sdev;
-        QLIST_INSERT_HEAD(&s->notifiers_list, node, next);
-        return;
-    }
-
-    /* update notifier node with new flags */
-    QLIST_FOREACH_SAFE(node, &s->notifiers_list, next, next_node) {
-        if (node->sdev == sdev) {
-            if (new == IOMMU_NOTIFIER_NONE) {
-                trace_smmuv3_notify_flag_del(iommu->parent_obj.name);
-                QLIST_REMOVE(node, next);
-                g_free(node);
-            }
-            return;
-        }
+        QLIST_INSERT_HEAD(&s->devices_with_notifiers, sdev, next);
+    } else if (new == IOMMU_NOTIFIER_NONE) {
+        trace_smmuv3_notify_flag_del(iommu->parent_obj.name);
+        QLIST_REMOVE(sdev, next);
     }
 }
 
diff --git a/include/hw/arm/smmu-common.h b/include/hw/arm/smmu-common.h
index b07cadd0ef..2c7fbf4202 100644
--- a/include/hw/arm/smmu-common.h
+++ b/include/hw/arm/smmu-common.h
@@ -80,13 +80,9 @@  typedef struct SMMUDevice {
     AddressSpace       as;
     uint32_t           cfg_cache_hits;
     uint32_t           cfg_cache_misses;
+    QLIST_ENTRY(SMMUDevice) next;
 } SMMUDevice;
 
-typedef struct SMMUNotifierNode {
-    SMMUDevice *sdev;
-    QLIST_ENTRY(SMMUNotifierNode) next;
-} SMMUNotifierNode;
-
 typedef struct SMMUPciBus {
     PCIBus       *bus;
     SMMUDevice   *pbdev[0]; /* Parent array is sparse, so dynamically alloc */
@@ -108,7 +104,7 @@  typedef struct SMMUState {
     GHashTable *iotlb;
     SMMUPciBus *smmu_pcibus_by_bus_num[SMMU_PCI_BUS_MAX];
     PCIBus *pci_bus;
-    QLIST_HEAD(, SMMUNotifierNode) notifiers_list;
+    QLIST_HEAD(, SMMUDevice) devices_with_notifiers;
     uint8_t bus_num;
     PCIBus *primary_bus;
 } SMMUState;