Re: [PATCH] thunderbolt: Make PCIe NHI support opt-in

[Konrad Dybcio]

On 9/16/26 9:11 AM, Greg KH wrote:
> On Tue, Sep 15, 2026 at 07:04:10PM +0200, Konrad Dybcio wrote:
>> From: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>
>>
>> With more implementations coming in, one may desire not to enable
>> support for the PCIe-attached NHIs. Allow it to be built as a module
>> atop the framework.
>>
>> Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>
> 
> Why would you not want this?  Can hardware not provide this for some
> platforms?  I thought it was part of the spec...

This is about the host interface/controller being attached over
something else than PCIe, not opting out of building support
PCIe-over-USB4 tunneling (I believe that's what you interpreted
it as)

On (at least) Qualcomm and Apple Silicon, the on-SoC controller
is an MMIO device, the ASi driver is in review and the Qualcomm
one is soon to be.

Konrad