[PATCH v8 1/5] cxl, ACPI, APEI, EINJ: Add CXL_EINJ Kconfig option

[Ben Cheatham <Benjamin.Cheatham@amd.com>]

Add CONFIG_CXL_EINJ to cxl/Kconfig. This option will allow for the CXL
core module to access helpers inside the EINJ module, while also giving
users the option of disabling CXL EINJ error types at build time.

Also update CONFIG_ACPI_APEI_EINJ to set CONFIG_CXL_EINJ by default.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Ben Cheatham <Benjamin.Cheatham@amd.com>
---
 drivers/acpi/apei/Kconfig |  1 +
 drivers/cxl/Kconfig       | 12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/drivers/acpi/apei/Kconfig b/drivers/acpi/apei/Kconfig
index 6b18f8bc7be3..4c3f0ec5731e 100644
--- a/drivers/acpi/apei/Kconfig
+++ b/drivers/acpi/apei/Kconfig
@@ -55,6 +55,7 @@ config ACPI_APEI_MEMORY_FAILURE
 config ACPI_APEI_EINJ
 	tristate "APEI Error INJection (EINJ)"
 	depends on ACPI_APEI && DEBUG_FS
+	imply CXL_BUS
 	help
 	  EINJ provides a hardware error injection mechanism, it is
 	  mainly used for debugging and testing the other parts of
diff --git a/drivers/cxl/Kconfig b/drivers/cxl/Kconfig
index 8ea1d340e438..6f4adcd733e5 100644
--- a/drivers/cxl/Kconfig
+++ b/drivers/cxl/Kconfig
@@ -154,4 +154,16 @@ config CXL_PMU
 	  monitoring units and provide standard perf based interfaces.
 
 	  If unsure say 'm'.
+
+config CXL_EINJ
+	bool "CXL Error INJection Support"
+	default ACPI_APEI_EINJ
+	depends on ACPI_APEI_EINJ && ACPI_APEI_EINJ=CXL_BUS
+	help
+	  Support for CXL protocol Error INJection through debugfs/cxl.
+	  Availability and which errors are supported is dependent on
+	  the host platform. Look to ACPI v6.5 section 18.6.4 and kernel
+	  EINJ documentation for more information.
+
+	  If unsure say 'n'
 endif
-- 
2.34.1