ACPI, APEI, EINJ support

EINJ provides a hardware error injection mechanism, this is useful for
debugging and testing of other APEI and RAS features.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/apei/Kconfig

@@ -6,3 +6,11 @@ config ACPI_APEI
 	  to the operating system. This improves NMI handling
 	  especially. In addition it supports error serialization and
 	  error injection.
+
+config ACPI_APEI_EINJ
+	tristate "APEI Error INJection (EINJ)"
+	depends on ACPI_APEI && DEBUG_FS
+	help
+	  EINJ provides a hardware error injection mechanism, it is
+	  mainly used for debugging and testing the other parts of
+	  APEI and some other RAS features.

drivers/acpi/apei/Makefile

 obj-$(CONFIG_ACPI_APEI)		+= apei.o
+obj-$(CONFIG_ACPI_APEI_EINJ)	+= einj.o
 
 apei-y := apei-base.o hest.o