x86: cpu architecture debug code

Introduce:

 cat /sys/kernel/debug/x86/cpu/*

for Intel and AMD processors to view / debug the state of each CPU.

By using this we can debug whole range of registers and other
cpu information for debugging purpose and monitor how things
are changing.

This can be useful for developers as well as for users.

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
LKML-Reference: <1236701373.3387.4.camel@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 31758378bcd2..03f0a3aa43b1 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -931,6 +931,12 @@ config X86_CPUID
           with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
           /dev/cpu/31/cpuid.
 
+config X86_CPU_DEBUG
+        tristate "/sys/kernel/debug/x86/cpu/* - CPU Debug support"
+        ---help---
+          If you select this option, this will provide various x86 CPUs
+          information through debugfs.
+
 choice
         prompt "High Memory Support"
         default HIGHMEM4G if !X86_NUMAQ