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-rw-r--r--docs/interop/vhost-user.txt11
1 files changed, 11 insertions, 0 deletions
diff --git a/docs/interop/vhost-user.txt b/docs/interop/vhost-user.txt
index 7854e50008..0d24203d31 100644
--- a/docs/interop/vhost-user.txt
+++ b/docs/interop/vhost-user.txt
@@ -709,6 +709,17 @@ Master message types
the slave must open a userfaultfd for later use.
Note that at this stage the migration is still in precopy mode.
+ * VHOST_USER_POSTCOPY_LISTEN
+ Id: 29
+ Master payload: N/A
+
+ Master advises slave that a transition to postcopy mode has happened.
+ The slave must ensure that shared memory is registered with userfaultfd
+ to cause faulting of non-present pages.
+
+ This is always sent sometime after a VHOST_USER_POSTCOPY_ADVISE, and
+ thus only when VHOST_USER_PROTOCOL_F_PAGEFAULT is supported.
+
Slave message types
-------------------