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authorAvi Kivity <avi@redhat.com>2011-07-26 14:26:13 +0300
committerAnthony Liguori <aliguori@us.ibm.com>2011-07-29 08:25:43 -0500
commit4ef4db860362ce9852c20b343e9813897ecdefce (patch)
tree17438c3a5a431ea0232b19a4f5db3e04620692d8 /memory.h
parentb8af1afbfbc157e058f27ab5382527350b814ee7 (diff)
memory: transaction API
Allow changes to the memory hierarchy to be accumulated and made visible all at once. This reduces computational effort, especially when an accelerator (e.g. kvm) is involved. Useful when a single register update causes multiple changes to an address space. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'memory.h')
-rw-r--r--memory.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/memory.h b/memory.h
index c280a39d2..4e518b2a1 100644
--- a/memory.h
+++ b/memory.h
@@ -456,6 +456,14 @@ void memory_region_add_subregion_overlap(MemoryRegion *mr,
void memory_region_del_subregion(MemoryRegion *mr,
MemoryRegion *subregion);
+/* Start a transaction; changes will be accumulated and made visible only
+ * when the transaction ends.
+ */
+void memory_region_transaction_begin(void);
+/* Commit a transaction and make changes visible to the guest.
+ */
+void memory_region_transaction_commit(void);
+
#endif
#endif