powerpc/tm: Make room for hypervisor in abort cause codes

PAPR carves out 0xff-0xe0 for hypervisor use of transactional memory software
abort cause codes.  Unfortunately we don't respect this currently.

Below fixes this to move our cause codes to below this region.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> # 3.9 only
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 8 insertions, 7 deletions

diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index a6136515c7f2..8f6a94b2dc99 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -113,14 +113,15 @@
 
 /* Reason codes describing kernel causes for transaction aborts.  By
    convention, bit0 is copied to TEXASR[56] (IBM bit 7) which is set if
-   the failure is persistent.
+   the failure is persistent.  PAPR saves 0xff-0xe0 for the hypervisor.
 */
-#define TM_CAUSE_RESCHED        0xfe
-#define TM_CAUSE_TLBI           0xfc
-#define TM_CAUSE_FAC_UNAV       0xfa
-#define TM_CAUSE_SYSCALL        0xf9 /* Persistent */
-#define TM_CAUSE_MISC           0xf6
-#define TM_CAUSE_SIGNAL         0xf4
+#define TM_CAUSE_PERSISTENT     0x01
+#define TM_CAUSE_RESCHED        0xde
+#define TM_CAUSE_TLBI           0xdc
+#define TM_CAUSE_FAC_UNAV       0xda
+#define TM_CAUSE_SYSCALL        0xd8  /* future use */
+#define TM_CAUSE_MISC           0xd6  /* future use */
+#define TM_CAUSE_SIGNAL         0xd4
 
 #if defined(CONFIG_PPC_BOOK3S_64)
 #define MSR_64BIT       MSR_SF