Hello,

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! 

On Sun, Jan 17, 2021 at 08:46:43AM -0800, reswara1@... wrote:

Hello,

Hi

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?

No, VT-d hardware could support Interrupt Remapping or Interrupt Posting or both of them.

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

Interrupt posting includes hardware support for optimized processing of interrupt requests from I/O
devices (Physical Functions, SR-IOV Virtual Functions, or Intel® Scalable IOV Assignable Device
Interfaces (ADIs)) that are directly assigned to a virtual machine.

Thanks.

Thank you so much for your help in advance!

First of all, thank you for your insights!

ACRN paper described that it used Intel Celeron Processor J3455 and the hardware doesn't support the posted-interrupt feature. 

Can you please let me know the intel processor (Eg. ATOM or XEON or anything specific) that supports this posted-interrupt feature?