lkml.org 
[lkml]   [2013]   [Jun]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[ 083/127] powerpc/tm: Make room for hypervisor in abort cause codes
Date
3.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Michael Neuling <mikey@neuling.org>

commit 35f7097fcedec63fcba1852dbee96f74a2d90878 upstream.

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>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
arch/powerpc/include/asm/reg.h | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)

--- 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



\
 
 \ /
  Last update: 2013-06-06 00:41    [W:0.261 / U:0.252 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site