Re: [PATCH v2 2/2] cxl/core: Skip non-CXL capabilities in MCAP

[engguopeng]

On Wed, Aug 19, 2026 at 11:09 PM Dave Jiang <dave.jiang@xxxxxxxxx> wrote:
> Sounds reasonable. Do you have MMPT support submitted to upstream for the PCI subsystem yet? I'm curious because there are certainly security concerns of an opaque pipe from device that the kernel has no visibility to. There will certainly be security pushback on the enabling from the kernel community without some protocol in place to ensure the data being tunneled will not result in malicious actions.
> 
> DJ 

No, MMPT support has not been submitted upstream yet, and I have not
looked into the security implications in detail. Thank you for pointing
this out.

I will try to investigate MMPT support, including the security concerns
you mentioned, before considering an upstream submission.

Thanks