Re: [PATCH v2] cxl/hdm: Enforce CFMWS memory type policy at decoder commit time

On Fri, 10 Jul 2026, Mayank Rana wrote:

>A CXL Fixed Memory Window Structure (CFMWS) in the ACPI CEDT table
>carries a restrictions field that describes the memory types a platform
>window supports.  cfmws_to_decoder_flags() translates this into
>CXL_DECODER_F_TYPE2 (HDM-DB permitted) and CXL_DECODER_F_TYPE3 (HDM-H
>permitted) flags on the root decoder.
>
>However, nothing currently prevents a caller from committing an endpoint
>or switch decoder whose target_type conflicts with the CFMWS policy:

Hi Mayank - please refer to the latest Back Invalidate patchset (v5)
for properly dealing with this:

https://lore.kernel.org/all/[email protected]/

Thanks,
Davidlohr