linux-kernel - [PATCH v2 09/15] cxl/region: Use the endpoint's SPA range to create a region

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Message-ID: <20250218132356.1809075-10-rrichter@amd.com>
Date: Tue, 18 Feb 2025 14:23:50 +0100
From: Robert Richter <rrichter@....com>
To: 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>
CC: <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>,
	Robert Richter <rrichter@....com>
Subject: [PATCH v2 09/15] cxl/region: Use the endpoint's SPA range to create a region

To create a region, SPA ranges must be used. With address translation
the endpoint's HPA range is not the same as the SPA range. Use the
previously calculated SPA range instead.

Signed-off-by: Robert Richter <rrichter@....com>
---
 drivers/cxl/core/region.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
index ffe6038249ed..6e0434eee6df 100644
--- a/drivers/cxl/core/region.c
+++ b/drivers/cxl/core/region.c
@@ -3445,14 +3445,14 @@ cxl_find_region_by_range(struct cxl_root_decoder *cxlrd, struct range *hpa)
 	return to_cxl_region(region_dev);
 }
 
-/* Establish an empty region covering the given HPA range */
+/* Establish an empty region covering the given SPA range */
 static struct cxl_region *construct_region(struct cxl_root_decoder *cxlrd,
 					   struct cxl_endpoint_decoder *cxled)
 {
 	struct cxl_memdev *cxlmd = cxled_to_memdev(cxled);
 	struct cxl_port *port = cxlrd_to_port(cxlrd);
 	struct cxl_dev_state *cxlds = cxlmd->cxlds;
-	struct range *hpa = &cxled->cxld.hpa_range;
+	struct range *spa = &cxled->spa_range;
 	int rc, part = READ_ONCE(cxled->part);
 	struct cxl_region_params *p;
 	struct cxl_region *cxlr;
@@ -3493,7 +3493,7 @@ static struct cxl_region *construct_region(struct cxl_root_decoder *cxlrd,
 		goto err;
 	}
 
-	*res = DEFINE_RES_MEM_NAMED(hpa->start, range_len(hpa),
+	*res = DEFINE_RES_MEM_NAMED(spa->start, range_len(spa),
 				    dev_name(&cxlr->dev));
 	rc = insert_resource(cxlrd->res, res);
 	if (rc) {
-- 
2.39.5