[PATCH] Kprobes: Track kprobe on a per_cpu basis - ppc64 changes

PPC64 changes to track kprobe execution on a per-cpu basis.  We now track the
kprobe state machine independently on each cpu using an arch specific kprobe
control block.

Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/include/asm-powerpc/kprobes.h b/include/asm-powerpc/kprobes.h
index b2f09f17fbe0..6cd0a3bfa280 100644
--- a/include/asm-powerpc/kprobes.h
+++ b/include/asm-powerpc/kprobes.h
@@ -27,6 +27,7 @@
  */
 #include <linux/types.h>
 #include <linux/ptrace.h>
+#include <linux/percpu.h>
 
 struct pt_regs;
 
@@ -53,6 +54,20 @@ struct arch_specific_insn {
         kprobe_opcode_t *insn;
 };
 
+struct prev_kprobe {
+        struct kprobe *kp;
+        unsigned long status;
+        unsigned long saved_msr;
+};
+
+/* per-cpu kprobe control block */
+struct kprobe_ctlblk {
+        unsigned long kprobe_status;
+        unsigned long kprobe_saved_msr;
+        struct pt_regs jprobe_saved_regs;
+        struct prev_kprobe prev_kprobe;
+};
+
 #ifdef CONFIG_KPROBES
 extern int kprobe_exceptions_notify(struct notifier_block *self,
                                     unsigned long val, void *data);