xen: Infratructure for XEN_TMEM_* hypercalls

and an implementation of XEN_TMEM_control save_begin.

Xen will read various fields at various time, but write nothing back for a
save_begin subop.

From: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13726 a5019735-40e9-0310-863c-91ae7b9d1cf9
3 files changed