powerpc/tm: Make room for hypervisor in abort cause codes
Michael Neuling [Sun, 26 May 2013 18:09:37 +0000 (18:09 +0000)]
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>

arch/powerpc/include/asm/reg.h

index a613651..8f6a94b 100644 (file)
 
 /* 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