linux-kernel - Re: [PATCH v2 06/15] cxl/region: Use endpoint's HPA range to find the port's decoder

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Message-ID: <aArNTsJfIxdM9ybQ@gourry-fedora-PF4VCD3F>
Date: Thu, 24 Apr 2025 19:46:22 -0400
From: Gregory Price <gourry@...rry.net>
To: Robert Richter <rrichter@....com>
Cc: Alison Schofield <alison.schofield@...el.com>,
	Vishal Verma <vishal.l.verma@...el.com>,
	Ira Weiny <ira.weiny@...el.com>,
	Dan Williams <dan.j.williams@...el.com>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	Dave Jiang <dave.jiang@...el.com>,
	Davidlohr Bueso <dave@...olabs.net>, linux-cxl@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	"Fabio M. De Francesco" <fabio.m.de.francesco@...ux.intel.com>,
	Terry Bowman <terry.bowman@....com>
Subject: Re: [PATCH v2 06/15] cxl/region: Use endpoint's HPA range to find
 the port's decoder

On Thu, Apr 24, 2025 at 05:49:35PM -0400, Gregory Price wrote:
> On Wed, Apr 23, 2025 at 08:28:03PM -0400, Gregory Price wrote:
> > @@ -916,13 +921,14 @@ cxl_find_decoder_early(struct cxl_port *port,
> >  		       struct cxl_region *cxlr)
> >  {
> >  	struct device *dev;
> > +	struct mad_context mad = { .p = &cxlr->params,
> > +				   .r =&cxled->cxld.hpa_range };
>                                                ^^^^^^^^^^^^^^
> 					       spa_range
> 
> Woops, missed this.  Not sure if it goes here or a later patch, but
> that's needed to make this work.
> 
> ~Gregory

And for the sake of completeness - I've confirmed that this is
sufficient to get a Zen5 working on top of

   v6.13 + (v6.14, v6.15, cxl-next) PCI/CXL backports

So a smaller set of changes than I was expecting (some other mild fixups
but nothing major).  Just kind of have to decide what the shape of this
change looks like, if not like this.

I can share my modified line if you'd like, but I haven't incorporated
any suggestions from the chain here.

~Gregory