On 2/5/23 6:03 PM, Dan Williams wrote:
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.
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Reviewed-by: Dave Jiang <dave.jiang@xxxxxxxxx>
---
drivers/cxl/Kconfig | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
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)"
