Currently we don't save and restore the checkpointed TAR, PPR and DSCR.
This adds the required save and restore to the treclaim and trechkpt code.
Signed-off-by: Michael Neuling <mi...@neuling.org>
Cc: <sta...@vger.kernel.org>
---
arch/powerpc/kernel/tm.S | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/arch/powerpc/kernel/tm.S b/arch/powerpc/kernel/tm.S
index 51be8fb..0554d1f 100644
--- a/arch/powerpc/kernel/tm.S
+++ b/arch/powerpc/kernel/tm.S
@@ -233,6 +233,16 @@ dont_backup_fp:
std r5, _CCR(r7)
std r6, _XER(r7)
+
+ /* ******************** TAR, PPR, DSCR ********** */
+ mfspr r3, SPRN_TAR
+ mfspr r4, SPRN_PPR
+ mfspr r5, SPRN_DSCR
+
+ std r3, THREAD_TM_TAR(r12)
+ std r4, THREAD_TM_PPR(r12)
+ std r5, THREAD_TM_DSCR(r12)
+
/* MSR and flags: We don't change CRs, and we don't need to alter
* MSR.
*/
@@ -347,6 +357,16 @@ dont_restore_fp:
mtmsr r6 /* FP/Vec off again! */
restore_gprs:
+
+ /* ******************** TAR, PPR, DSCR ********** */
+ ld r4, THREAD_TM_TAR(r3)
+ ld r5, THREAD_TM_PPR(r3)
+ ld r6, THREAD_TM_DSCR(r3)
+
+ mtspr SPRN_TAR, r4
+ mtspr SPRN_PPR, r5
+ mtspr SPRN_DSCR, r6
+
/* ******************** CR,LR,CCR,MSR ********** */
ld r3, _CTR(r7)
ld r4, _LINK(r7)
--
1.8.1.2
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