linux-kernel - Re: [PATCH v7 06/11] cxl/region: Add @hpa_range argument to function cxl_calc_interleave

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Message-ID: <20251117135720.00006500@huawei.com>
Date: Mon, 17 Nov 2025 13:57:20 +0000
From: Jonathan Cameron <jonathan.cameron@...wei.com>
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>, Dave Jiang <dave.jiang@...el.com>, "Davidlohr
 Bueso" <dave@...olabs.net>, <linux-cxl@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Gregory Price <gourry@...rry.net>, "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 v7 06/11] cxl/region: Add @hpa_range argument to
 function cxl_calc_interleave_pos()

On Fri, 14 Nov 2025 22:39:19 +0100
Robert Richter <rrichter@....com> wrote:

> cxl_calc_interleave_pos() uses the endpoint decoder's HPA range to
> determine its interleaving position. This requires the endpoint
> decoders to be an SPA, which is not the case for systems that need
> address translation.
> 
> Add a separate @hpa_range argument to function
> cxl_calc_interleave_pos() to specify the address range. Now it is
> possible to pass the SPA translated address range of an endpoint
> decoder to function cxl_calc_interleave_pos().
> 
> Refactor only, no functional changes.
> 
> Patch is a prerequisite to implement address translation.
> 
> Reviewed-by: Gregory Price <gourry@...rry.net>
> Reviewed-by: Dave Jiang <dave.jiang@...el.com>
> Tested-by: Gregory Price <gourry@...rry.net>
> Signed-off-by: Robert Richter <rrichter@....com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@...wei.com>