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

Hi Davidlohr

Thank you for your review and suggestion.

On 7/13/2026 9:04 AM, Davidlohr Bueso wrote:
> 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]/
Ok. I will review propose changes, and rework upon this fix.

Regards,
Mayank

> Thanks,
> Davidlohr