x86: EDAC: carve out AMD MCE decoding logic

This converts the MCE decoding logic into a standalone config
option which can be built-in or a module, the first one being the
default for MCEs happening early on in the boot process.

This, beyond being separated in a cleaner way, also saves RAM by
making the decoding logic modular.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andi Kleen <andi@firstfloor.org>
LKML-Reference: <20091002133148.GD28682@aftab>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 13 insertions, 1 deletions

diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
index 02127e59fe8e..55c9c59b3f71 100644
--- a/drivers/edac/Kconfig
+++ b/drivers/edac/Kconfig
@@ -47,6 +47,18 @@ config EDAC_DEBUG_VERBOSE
           Source file name and line number where debugging message
           printed will be added to debugging message.
 
+ config EDAC_DECODE_MCE
+        tristate "Decode MCEs in human-readable form (only on AMD for now)"
+        depends on CPU_SUP_AMD && X86_MCE
+        default y
+        ---help---
+          Enable this option if you want to decode Machine Check Exceptions
+          occuring on your machine in human-readable form.
+
+          You should definitely say Y here in case you want to decode MCEs
+          which occur really early upon boot, before the module infrastructure
+          has been initialized.
+
 config EDAC_MM_EDAC
         tristate "Main Memory EDAC (Error Detection And Correction) reporting"
         help
@@ -59,7 +71,7 @@ config EDAC_MM_EDAC
 
 config EDAC_AMD64
         tristate "AMD64 (Opteron, Athlon64) K8, F10h, F11h"
-        depends on EDAC_MM_EDAC && K8_NB && X86_64 && PCI && CPU_SUP_AMD
+        depends on EDAC_MM_EDAC && K8_NB && X86_64 && PCI && EDAC_DECODE_MCE
         help
           Support for error detection and correction on the AMD 64
           Families of Memory Controllers (K8, F10h and F11h)