1 files changed, 58 insertions, 3 deletions

diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index 19df881bf67b..0baf64ec80d0 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -2,9 +2,42 @@ menu "Kernel hacking"
 
 source "lib/Kconfig.debug"
 
+config DEBUG_STACKOVERFLOW
+        bool "Check for stack overflows"
+        depends on DEBUG_KERNEL && PPC64
+        help
+          This option will cause messages to be printed if free stack space
+          drops below a certain limit.
+
+config KPROBES
+        bool "Kprobes"
+        depends on DEBUG_KERNEL && PPC64
+        help
+          Kprobes allows you to trap at almost any kernel address and
+          execute a callback function.  register_kprobe() establishes
+          a probepoint and specifies the callback.  Kprobes is useful
+          for kernel debugging, non-intrusive instrumentation and testing.
+          If in doubt, say "N".
+
+config DEBUG_STACK_USAGE
+        bool "Stack utilization instrumentation"
+        depends on DEBUG_KERNEL && PPC64
+        help
+          Enables the display of the minimum amount of free stack which each
+          task has ever had available in the sysrq-T and sysrq-P debug output.
+
+          This option will slow down process creation somewhat.
+
+config DEBUGGER
+        bool "Enable debugger hooks"
+        depends on DEBUG_KERNEL
+        help
+          Include in-kernel hooks for kernel debuggers. Unless you are
+          intending to debug the kernel, say N here.
+
 config KGDB
         bool "Include kgdb kernel debugger"
-        depends on DEBUG_KERNEL && (BROKEN || PPC_GEN550 || 4xx)
+        depends on DEBUGGER && (BROKEN || PPC_GEN550 || 4xx)
         select DEBUG_INFO
         help
           Include in-kernel hooks for kgdb, the Linux kernel source level
@@ -40,14 +73,36 @@ config KGDB_CONSOLE
 
 config XMON
         bool "Include xmon kernel debugger"
-        depends on DEBUG_KERNEL
+        depends on DEBUGGER && !PPC_ISERIES
         help
           Include in-kernel hooks for the xmon kernel monitor/debugger.
           Unless you are intending to debug the kernel, say N here.
+          Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
+          nothing will appear on the screen (xmon writes directly to the
+          framebuffer memory).
+          The cmdline option 'xmon' or 'xmon=early' will drop into xmon
+          very early during boot. 'xmon=on' will just enable the xmon
+          debugger hooks.  'xmon=off' will disable the debugger hooks
+          if CONFIG_XMON_DEFAULT is set.
+
+config XMON_DEFAULT
+        bool "Enable xmon by default"
+        depends on XMON
+        help
+          xmon is normally disabled unless booted with 'xmon=on'.
+          Use 'xmon=off' to disable xmon init during runtime.
+
+config IRQSTACKS
+        bool "Use separate kernel stacks when processing interrupts"
+        depends on PPC64
+        help
+          If you say Y here the kernel will use separate kernel stacks
+          for handling hard and soft interrupts.  This can help avoid
+          overflowing the process kernel stacks.
 
 config BDI_SWITCH
         bool "Include BDI-2000 user context switcher"
-        depends on DEBUG_KERNEL
+        depends on DEBUG_KERNEL && PPC32
         help
           Include in-kernel support for the Abatron BDI2000 debugger.
           Unless you are intending to debug the kernel with one of these