This change introduces support for preallocated shared file descriptor based 
memory backing.

It  allows vhost-user to be used without hugepages. This is achieved by 
introducing 3 new sub elements to the memoryBacking element: source, access & 
allocation which will configure qemu commandline during VM startup accordingly.



First patch adds parsing of elements and storing the values in mem structure.

Second patch configures the qemu commandline on the base of values in mem 
structure.



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Attachment: 0002-Add-xml-to-argv-for-memorybacking-access-source.patch
Description: 0002-Add-xml-to-argv-for-memorybacking-access-source.patch

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