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Invalidate cache by scanning and flushing the whole guest memory is inefficient which might cause long execution time for WBINVD emulation. A long execution in hypervisor might cause a vCPU stuck phenomenon what impact Windows Guest booting. This patch introduce a workaround method that pausing all other vCPUs in the same VM when do wbinvd emulation. Tracked-On: #4703 Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>