diff mbox series

[v2,11/20] cxl/region: Enable CONFIG_CXL_REGION to be toggled

Message ID 167601998765.1924368.258370414771847699.stgit@dwillia2-xfh.jf.intel.com (mailing list archive)
State Handled Elsewhere, archived
Headers show
Series CXL RAM and the 'Soft Reserved' => 'System RAM' default | expand

Commit Message

Dan Williams Feb. 10, 2023, 9:06 a.m. UTC 
Add help text and a label so the CXL_REGION config option can be
toggled. This is mainly to enable compile testing without region
support.

Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Gregory Price <gregory.price@memverge.com>
Tested-by: Fan Ni <fan.ni@samsung.com>
Link: https://lore.kernel.org/r/167564539875.847146.16213498614174558767.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 drivers/cxl/Kconfig |   12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/cxl/Kconfig b/drivers/cxl/Kconfig
index 0ac53c422c31..163c094e67ae 100644
--- a/drivers/cxl/Kconfig
+++ b/drivers/cxl/Kconfig
@@ -104,12 +104,22 @@  config CXL_SUSPEND
 	depends on SUSPEND && CXL_MEM
 
 config CXL_REGION
-	bool
+	bool "CXL: Region Support"
 	default CXL_BUS
 	# For MAX_PHYSMEM_BITS
 	depends on SPARSEMEM
 	select MEMREGION
 	select GET_FREE_REGION
+	help
+	  Enable the CXL core to enumerate and provision CXL regions. A CXL
+	  region is defined by one or more CXL expanders that decode a given
+	  system-physical address range. For CXL regions established by
+	  platform-firmware this option enables memory error handling to
+	  identify the devices participating in a given interleaved memory
+	  range. Otherwise, platform-firmware managed CXL is enabled by being
+	  placed in the system address map and does not need a driver.
+
+	  If unsure say 'y'
 
 config CXL_REGION_INVALIDATION_TEST
 	bool "CXL: Region Cache Management Bypass (TEST)"