talos-op-linux/arch/x86/include/asm/cpu_debug.h, branch v2.6.36-rc5

x86: Remove "x86 CPU features in debugfs" (CONFIG_X86_CPU_DEBUG)

2010-01-24T02:27:47+00:00

CONFIG_X86_CPU_DEBUG, which provides some parsed versions of the x86 CPU configuration via debugfs, has caused boot failures on real hardware. The value of this feature has been marginal at best, as all this information is already available to userspace via generic interfaces. Causes crashes that have not been fixed + minimal utility -> remove. See the referenced LKML thread for more information. Reported-by: Ozan Çağlayan Signed-off-by: H. Peter Anvin LKML-Reference: Cc: Jaswinder Singh Rajput Cc: Linus Torvalds Cc: Rafael J. Wysocki Cc: Yinghai Lu Cc:

x86: cpu_debug: Remove model information to reduce encoding-decoding

2009-06-07T10:22:56+00:00

Remove model information, encoding/decoding and reduce bookkeeping. This, besides removing a lot of code and cleaning up the code, also enables these features on many more CPUs that were enumerated before. Reported-by: Ingo Molnar Signed-off-by: Jaswinder Singh Rajput Cc: Alan Cox LKML-Reference: <1244224637.8212.6.camel@ht.satnam> Signed-off-by: Ingo Molnar

x86: cpu_debug remove execute permission

2009-04-09T04:34:02+00:00

It seems by mistake these files got execute permissions so removing it. Signed-off-by: Jaswinder Singh Rajput LKML-Reference: <1239211186.9037.2.camel@ht.satnam> Signed-off-by: Ingo Molnar

x86: cpu_debug add support for various AMD CPUs

2009-03-14T17:07:58+00:00

Impact: Added AMD CPUs support Added flags for various AMD CPUs. Signed-off-by: Jaswinder Singh Rajput Signed-off-by: Ingo Molnar

x86: cpu_debug add write support for MSRs

2009-03-13T02:02:45+00:00

Supported write flag for registers. currently write is enabled only for PMC MSR. [root@ht]# cat /sys/kernel/debug/x86/cpu/cpu1/pmc/0x300/value 0x0 [root@ht]# echo 1234 > /sys/kernel/debug/x86/cpu/cpu1/pmc/0x300/value [root@ht]# cat /sys/kernel/debug/x86/cpu/cpu1/pmc/0x300/value 0x4d2 [root@ht]# echo 0x1234 > /sys/kernel/debug/x86/cpu/cpu1/pmc/0x300/value [root@ht]# cat /sys/kernel/debug/x86/cpu/cpu1/pmc/0x300/value 0x1234 Signed-off-by: Jaswinder Singh Rajput Signed-off-by: Ingo Molnar

x86: cpu architecture debug code

2009-03-10T17:39:45+00:00

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 LKML-Reference: <1236701373.3387.4.camel@localhost.localdomain> Signed-off-by: Ingo Molnar