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[RFC,10/13] memory: add MemoryRegionIOMMUOps.replay() callback

Message ID 1481020588-4245-11-git-send-email-peterx@redhat.com
State New
Headers show

Commit Message

Peter Xu Dec. 6, 2016, 10:36 a.m. UTC 
Originally we have one memory_region_iommu_replay() function, which is
the default behavior to replay the translations of the whole IOMMU
region. However, on some platform like x86, we may want our own replay
logic for IOMMU regions. This patch add one more hook for IOMMUOps for
the callback, and it'll override the default if set.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 include/exec/memory.h | 2 ++
 memory.c              | 6 ++++++
 2 files changed, 8 insertions(+)
diff mbox

Patch

diff --git a/include/exec/memory.h b/include/exec/memory.h
index 9902e9e..6bdd12c 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -183,6 +183,8 @@  struct MemoryRegionIOMMUOps {
     void (*notify_flag_changed)(MemoryRegion *iommu,
                                 IOMMUNotifierFlag old_flags,
                                 IOMMUNotifierFlag new_flags);
+    /* Set this up to provide customized IOMMU replay function */
+    void (*replay)(MemoryRegion *iommu, IOMMUNotifier *notifier);
 };
 
 typedef struct CoalescedMemoryRange CoalescedMemoryRange;
diff --git a/memory.c b/memory.c
index 84c91fa..9ad6319 100644
--- a/memory.c
+++ b/memory.c
@@ -1624,6 +1624,12 @@  void memory_region_iommu_replay(MemoryRegion *mr, IOMMUNotifier *n,
     hwaddr addr, granularity;
     IOMMUTLBEntry iotlb;
 
+    /* If the IOMMU has its own replay callback, override */
+    if (mr->iommu_ops->replay) {
+        mr->iommu_ops->replay(mr, n);
+        return;
+    }
+
     granularity = memory_region_iommu_get_min_page_size(mr);
 
     for (addr = 0; addr < memory_region_size(mr); addr += granularity) {