powerpc: New macros for transactional memory support

This adds new macros for saving and restoring checkpointed architected state
from and to the thread_struct.

It also adds some debugging macros for when your brain explodes trying to debug
your transactional memory enabled kernel.

Signed-off-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index a008cf5c0fce..bd5de5deaf51 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -78,6 +78,13 @@ EXPORT_SYMBOL(__debugger_break_match);
 EXPORT_SYMBOL(__debugger_fault_handler);
 #endif
 
+/* Transactional Memory trap debug */
+#ifdef TM_DEBUG_SW
+#define TM_DEBUG(x...) printk(KERN_INFO x)
+#else
+#define TM_DEBUG(x...) do { } while(0)
+#endif
+
 /*
  * Trap & Exception support
  */
@@ -350,6 +357,7 @@ static inline int check_io_access(struct pt_regs *regs)
    exception is in the MSR. */
 #define get_reason(regs)        ((regs)->msr)
 #define get_mc_reason(regs)     ((regs)->msr)
+#define REASON_TM               0x200000
 #define REASON_FP               0x100000
 #define REASON_ILLEGAL          0x80000
 #define REASON_PRIVILEGED       0x40000