linux-kernel - Re: [PATCH v3 06/11] cxl/region: Separate region parameter setup and region construction

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Message-ID: <aMsW9BW85jBxyCIC@gourry-fedora-PF4VCD3F>
Date: Wed, 17 Sep 2025 16:15:48 -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>,
	Joshua Hahn <joshua.hahnjy@...il.com>
Subject: Re: [PATCH v3 06/11] cxl/region: Separate region parameter setup and
 region construction

On Fri, Sep 12, 2025 at 04:45:08PM +0200, Robert Richter wrote:
> To construct a region, the region parameters such as address range and
> interleaving config need to be determined. This is done while
> constructing the region by inspecting the endpoint decoder
> configuration. The endpoint decoder is passed as a function argument.
> 
> With address translation the endpoint decoder data is no longer
> sufficient to extract the region parameters as some of the information
> is obtained using other methods such as using firmware calls.
> 
> In a first step, separate code to determine and setup the region
> parameters from the region construction. Temporarily store all the
> data to create the region in the new struct cxl_region_context. Add a
> new function setup_region_parameters() to fill that struct and later
> use it to construct the region. This simplifies the extension of the
> function to support other methods needed, esp. to support address
> translation.
> 
> Patch is a prerequisite to implement address translation.
> 
> Signed-off-by: Robert Richter <rrichter@....com>

Dave already got the init code, so with that change feel free to add

Reviewed-by: Gregory Price <gourry@...rry.net>