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Discard the input/output data when open tty file. To avoid the mevent callback is triggered immediately when the fd is added to epoll. Also update the uart_drain only read the data from tty file when fifo has available space. Tracked-On: #2159 Signed-off-by: Yin Fengwei <fengwei.yin@intel.com> Acked-by: Anthony Xu <anthony.xu@intel.com>
ACRN Device Model ################# Introduction ============ The ACRN Device Model provides **device sharing** capabilities between the Service OS and Guest OSs. It is a component that is used in conjunction with the `ACRN Hypervisor`_ and this is installed within the Service OS. You can find out more about Project ACRN on the `Project ACRN documentation`_ website. .. _`ACRN Hypervisor`: https://github.com/projectacrn/acrn-hypervisor .. _`Project ACRN documentation`: https://projectacrn.github.io/