Conghui 12bfa98a37 hv: support asyncio request ... Current IO emulation is synchronous. The user VM need to wait for the completion of the the I/O request before return. But Virtio Spec introduces introduces asynchronous IO with a new register in MMIO/PIO space named NOTIFY, to be used for FE driver to notify BE driver, ACRN hypervisor can emulate this register by sending a notification to vCPU in Service VM side. This way, FE side can resume to work without waiting for the full completion of BE side response. Tracked-On: #8209 Signed-off-by: Conghui <conghui.chen@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>		2022-09-27 10:26:42 +08:00
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x86/asm	hv: support asyncio request	2022-09-27 10:26:42 +08:00