VT-d posted interrupts support



I am looking forward to buying intel embedded SoC that supports VT-d posted interrupts. There are a lot of intel processors used for embedded systems that support VT-d. 

Q1) Does VT-d support guarantees VT-d posted interrupts mechanism?

Q2) If not, what are the intel embedded processors that support VT-d posted interrupt mechanism?

Thank you so much for your help in advance! 

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