netdev - [PATCH v22 13/25] cxl: Export functions for unwinding cxl by accelerators

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251205115248.772945-14-alejandro.lucero-palau@amd.com>
Date: Fri, 5 Dec 2025 11:52:36 +0000
From: <alejandro.lucero-palau@....com>
To: <linux-cxl@...r.kernel.org>, <netdev@...r.kernel.org>,
	<dan.j.williams@...el.com>, <edward.cree@....com>, <davem@...emloft.net>,
	<kuba@...nel.org>, <pabeni@...hat.com>, <edumazet@...gle.com>,
	<dave.jiang@...el.com>
CC: Alejandro Lucero <alucerop@....com>
Subject: [PATCH v22 13/25] cxl: Export functions for unwinding cxl by accelerators

From: Alejandro Lucero <alucerop@....com>

Add unregister_region() and cxl_decoder_detach() to the accelerator
driver API for a clean exit.

Signed-off-by: Alejandro Lucero <alucerop@....com>
---
 drivers/cxl/core/core.h   | 5 -----
 drivers/cxl/core/region.c | 4 +++-
 include/cxl/cxl.h         | 9 +++++++++
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/cxl/core/core.h b/drivers/cxl/core/core.h
index 1c1726856139..9a6775845afe 100644
--- a/drivers/cxl/core/core.h
+++ b/drivers/cxl/core/core.h
@@ -15,11 +15,6 @@ extern const struct device_type cxl_pmu_type;
 
 extern struct attribute_group cxl_base_attribute_group;
 
-enum cxl_detach_mode {
-	DETACH_ONLY,
-	DETACH_INVALIDATE,
-};
-
 #ifdef CONFIG_CXL_REGION
 extern struct device_attribute dev_attr_create_pmem_region;
 extern struct device_attribute dev_attr_create_ram_region;
diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
index 8166a402373e..104caa33b7bb 100644
--- a/drivers/cxl/core/region.c
+++ b/drivers/cxl/core/region.c
@@ -2199,6 +2199,7 @@ int cxl_decoder_detach(struct cxl_region *cxlr,
 	}
 	return 0;
 }
+EXPORT_SYMBOL_NS_GPL(cxl_decoder_detach, "CXL");
 
 static int __attach_target(struct cxl_region *cxlr,
 			   struct cxl_endpoint_decoder *cxled, int pos,
@@ -2393,7 +2394,7 @@ static struct cxl_region *to_cxl_region(struct device *dev)
 	return container_of(dev, struct cxl_region, dev);
 }
 
-static void unregister_region(void *_cxlr)
+void unregister_region(void *_cxlr)
 {
 	struct cxl_region *cxlr = _cxlr;
 	struct cxl_region_params *p = &cxlr->params;
@@ -2412,6 +2413,7 @@ static void unregister_region(void *_cxlr)
 	cxl_region_iomem_release(cxlr);
 	put_device(&cxlr->dev);
 }
+EXPORT_SYMBOL_NS_GPL(unregister_region, "CXL");
 
 static struct lock_class_key cxl_region_key;
 
diff --git a/include/cxl/cxl.h b/include/cxl/cxl.h
index f02dd817b40f..b8683c75dfde 100644
--- a/include/cxl/cxl.h
+++ b/include/cxl/cxl.h
@@ -255,4 +255,13 @@ struct cxl_endpoint_decoder *cxl_get_committed_decoder(struct cxl_memdev *cxlmd,
 						       struct cxl_region **cxlr);
 struct range;
 int cxl_get_region_range(struct cxl_region *region, struct range *range);
+enum cxl_detach_mode {
+	DETACH_ONLY,
+	DETACH_INVALIDATE,
+};
+
+int cxl_decoder_detach(struct cxl_region *cxlr,
+		       struct cxl_endpoint_decoder *cxled, int pos,
+		       enum cxl_detach_mode mode);
+void unregister_region(void *_cxlr);
 #endif /* __CXL_CXL_H__ */
-- 
2.34.1