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a77b67d402
If queued invalidation interface is available and enabled, queued invalidation interface will be used instead of the register based interface. According to Vt-d2 specification, when queued invalidation is enabled, invalidation command submit works only through invalidation queue and not through the command registers interface. Signed-off-by: Youquan Song <youquan.song@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>