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-rw-r--r--arch/x86/ras/Kconfig23
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+# SPDX-License-Identifier: GPL-2.0
+config RAS_CEC
+ bool "Correctable Errors Collector"
+ depends on X86_MCE && MEMORY_FAILURE && DEBUG_FS
+ help
+ This is a small cache which collects correctable memory errors per 4K
+ page PFN and counts their repeated occurrence. Once the counter for a
+ PFN overflows, we try to soft-offline that page as we take it to mean
+ that it has reached a relatively high error count and would probably
+ be best if we don't use it anymore.
+
+ Bear in mind that this is absolutely useless if your platform doesn't
+ have ECC DIMMs and doesn't have DRAM ECC checking enabled in the BIOS.
+
+config RAS_CEC_DEBUG
+ bool "CEC debugging machinery"
+ default n
+ depends on RAS_CEC
+ help
+ Add extra files to (debugfs)/ras/cec to test the correctable error
+ collector feature. "pfn" is a writable file that allows user to
+ simulate an error in a particular page frame. "array" is a read-only
+ file that dumps out the current state of all pages logged so far.