1 files changed, 9 insertions, 1 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5ad92419be19..5a0a752f3ddd 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1330,8 +1330,16 @@ config MICROCODE_AMD
           processors will be enabled.
 
 config MICROCODE_OLD_INTERFACE
-        def_bool y
+        bool "Ancient loading interface (DEPRECATED)"
+        default n
         depends on MICROCODE
+        ---help---
+          DO NOT USE THIS! This is the ancient /dev/cpu/microcode interface
+          which was used by userspace tools like iucode_tool and microcode.ctl.
+          It is inadequate because it runs too late to be able to properly
+          load microcode on a machine and it needs special tools. Instead, you
+          should've switched to the early loading method with the initrd or
+          builtin microcode by now: Documentation/x86/microcode.txt
 
 config X86_MSR
         tristate "/dev/cpu/*/msr - Model-specific register support"