qemu-options: document memory-backend-ram

The documentation should mention -object memory-backend-ram.

Suggested-by: Yumei Huang <[email protected]>
Signed-off-by: Stefan Hajnoczi <[email protected]>
Message-Id: <20171128161529[email protected]>
Reviewed-by: Eric Blake <[email protected]>
Reviewed-by: Eduardo Habkost <[email protected]>
Signed-off-by: Eduardo Habkost <[email protected]>

diff --git a/qemu-options.hx b/qemu-options.hx
index fe8c04f6443c08601c55fdecb279a0b12bc6690d..5b0ee43b1833d1a4c6a1828d7ca1ad7f939fecd5 100644 (file)
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -4025,6 +4025,13 @@ restrict memory allocation to the given host node list
 interleave memory allocations across the given host node list
 @end table
 
+@item -object memory-backend-ram,id=@var{id},merge=@var{on|off},dump=@var{on|off},prealloc=@var{on|off},size=@var{size},host-nodes=@var{host-nodes},policy=@var{default|preferred|bind|interleave}
+
+Creates a memory backend object, which can be used to back the guest RAM.
+Memory backend objects offer more control than the @option{-m} option that is
+traditionally used to define guest RAM. Please refer to
+@option{memory-backend-file} for a description of the options.
+
 @item -object rng-random,id=@var{id},filename=@var{/dev/random}
 
 Creates a random number generator backend which obtains entropy from