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When the IO/MMIO acccess on Android guest causes the trap to hypervisor, it will be blocked until the ioreq emulation is completed. In order to get the better performance, it will be better that the ioreq emulation can be completed ASAP. As it is handled in SOS kernel, the corresponding thread priority will be raised. Tracked-On:#3242 Signed-off-by: Liu, Shuo <shuo.liu@intel.com> Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>