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Does intel atom support hot plug of PCI devices

VPATI3
Novice
2,290 Views

Does intel atom support hot plug of PCI devices ?

If so, is there a documentation that describes the feature ?

Use case:

 

we would keep out of reset an FPGA after system boot. That FPGA will be passed to a Linux Container, we would receive the hotplug notification for this event.

Thanks,

Vishal.

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3 Replies
Gabriel_T_Intel
Employee
788 Views

Hello Vishal

Could you tell us please the spec code of your Intel Atom?

Best Regards

Gabriel

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VPATI3
Novice
788 Views

Hi Gabriel,

We are using the Intel Atom Processor,C2508 4C 2M Cache.

--

Vishal

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Gabriel_T_Intel
Employee
788 Views

Hi Vishal.

Unfortunately PCI Express Hot-Plug events are not supported by the Intel Atom Processor C2508.

Please review this Document, (Doc number 51024) , http://www.intel.com/content/www/us/en/secure/intelligent-systems/privileged/rangeley/soc-external-design-spec.html Intel Atom Processor C2000 Product Family for Communications Infrastructure, External Design Specification (EDS), on section 12.2 page 247 " The Hardware-based and card-detect PCIe Hot-Plug is not a supported feature".

In the same document, section 12.5.1 page 258, "The SoC PCI Express * Root Ports do not support the hot-add and hot-removal of PCI Express adapters. The PCIe specification calls this PCI Express Hot-Plug* support. The root ports also do not support the detection of an adapter that has been newly plugged-in (connected) or newly powered-on".

If there is any other question or comment please let us know.

Best regards

Gabriel Thomas

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