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

Robert Richter
2025-02-18T13:25:09Z

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@amd.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