[Skiboot] [PATCH] SLW: Remove stop1_lite and stop2_lite

[Akshay Adiga]

Lite states don't give up the SMT resources, can potentially have a
performance impact on sibling threads. At latencies of stop1_lite and
stop2_lite , lite states dont make sense and can have performance
impact.

Signed-off-by: Akshay Adiga <akshay.adiga at linux.vnet.ibm.com>
---
 hw/slw.c | 29 +----------------------------
 1 file changed, 1 insertion(+), 28 deletions(-)

diff --git a/hw/slw.c b/hw/slw.c
index c059d9c..513be7b 100644
--- a/hw/slw.c
+++ b/hw/slw.c
@@ -529,20 +529,7 @@ static struct cpu_idle_states power9_cpu_idle_states[] = {
 				 | OPAL_PM_PSSCR_ESL \
 				 | OPAL_PM_PSSCR_EC,
 		.pm_ctrl_reg_mask = OPAL_PM_PSSCR_MASK },
-	{
-		.name = "stop1_lite", /* Enter stop1 with no state loss */
-		.latency_ns = 4900,
-		.residency_ns = 49000,
-		.flags = 0*OPAL_PM_DEC_STOP \
-		       | 0*OPAL_PM_TIMEBASE_STOP  \
-		       | 0*OPAL_PM_LOSE_USER_CONTEXT \
-		       | 0*OPAL_PM_LOSE_HYP_CONTEXT \
-		       | 0*OPAL_PM_LOSE_FULL_CONTEXT \
-		       | 1*OPAL_PM_STOP_INST_FAST,
-		.pm_ctrl_reg_val = OPAL_PM_PSSCR_RL(1) \
-				 | OPAL_PM_PSSCR_MTL(3) \
-				 | OPAL_PM_PSSCR_TR(3),
-		.pm_ctrl_reg_mask = OPAL_PM_PSSCR_MASK },
+
 	{
 		.name = "stop1",
 		.latency_ns = 5000,
@@ -560,20 +547,6 @@ static struct cpu_idle_states power9_cpu_idle_states[] = {
 				 | OPAL_PM_PSSCR_EC,
 		.pm_ctrl_reg_mask = OPAL_PM_PSSCR_MASK },
 	{
-		.name = "stop2_lite", /* Enter stop2 with no state loss */
-		.latency_ns = 9900,
-		.residency_ns = 99000,
-		.flags = 0*OPAL_PM_DEC_STOP \
-		       | 0*OPAL_PM_TIMEBASE_STOP  \
-		       | 0*OPAL_PM_LOSE_USER_CONTEXT \
-		       | 0*OPAL_PM_LOSE_HYP_CONTEXT \
-		       | 0*OPAL_PM_LOSE_FULL_CONTEXT \
-		       | 1*OPAL_PM_STOP_INST_FAST,
-		.pm_ctrl_reg_val = OPAL_PM_PSSCR_RL(2) \
-				 | OPAL_PM_PSSCR_MTL(3) \
-				 | OPAL_PM_PSSCR_TR(3),
-		.pm_ctrl_reg_mask = OPAL_PM_PSSCR_MASK },
-	{
 		.name = "stop2",
 		.latency_ns = 10000,
 		.residency_ns = 100000,
-- 
2.5.5