1 files changed, 76 insertions, 1 deletions

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 4d140bbbe100..9b7ee7e427df 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -89,6 +89,7 @@ struct idle_cpu {
 	 * Indicate which enable bits to clear here.
 	 */
 	unsigned long auto_demotion_disable_flags;
+	bool byt_auto_demotion_disable_flag;
 	bool disable_promotion_to_c1e;
 };
 
@@ -442,6 +443,66 @@ static struct cpuidle_state hsw_cstates[] = {
 	{
 		.enter = NULL }
 };
+static struct cpuidle_state bdw_cstates[] = {
+	{
+		.name = "C1-BDW",
+		.desc = "MWAIT 0x00",
+		.flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID,
+		.exit_latency = 2,
+		.target_residency = 2,
+		.enter = &intel_idle },
+	{
+		.name = "C1E-BDW",
+		.desc = "MWAIT 0x01",
+		.flags = MWAIT2flg(0x01) | CPUIDLE_FLAG_TIME_VALID,
+		.exit_latency = 10,
+		.target_residency = 20,
+		.enter = &intel_idle },
+	{
+		.name = "C3-BDW",
+		.desc = "MWAIT 0x10",
+		.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 40,
+		.target_residency = 100,
+		.enter = &intel_idle },
+	{
+		.name = "C6-BDW",
+		.desc = "MWAIT 0x20",
+		.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 133,
+		.target_residency = 400,
+		.enter = &intel_idle },
+	{
+		.name = "C7s-BDW",
+		.desc = "MWAIT 0x32",
+		.flags = MWAIT2flg(0x32) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 166,
+		.target_residency = 500,
+		.enter = &intel_idle },
+	{
+		.name = "C8-BDW",
+		.desc = "MWAIT 0x40",
+		.flags = MWAIT2flg(0x40) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 300,
+		.target_residency = 900,
+		.enter = &intel_idle },
+	{
+		.name = "C9-BDW",
+		.desc = "MWAIT 0x50",
+		.flags = MWAIT2flg(0x50) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 600,
+		.target_residency = 1800,
+		.enter = &intel_idle },
+	{
+		.name = "C10-BDW",
+		.desc = "MWAIT 0x60",
+		.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 2600,
+		.target_residency = 7700,
+		.enter = &intel_idle },
+	{
+		.enter = NULL }
+};
 
 static struct cpuidle_state atom_cstates[] = {
 	{
@@ -613,6 +674,7 @@ static const struct idle_cpu idle_cpu_snb = {
 static const struct idle_cpu idle_cpu_byt = {
 	.state_table = byt_cstates,
 	.disable_promotion_to_c1e = true,
+	.byt_auto_demotion_disable_flag = true,
 };
 
 static const struct idle_cpu idle_cpu_ivb = {
@@ -630,6 +692,11 @@ static const struct idle_cpu idle_cpu_hsw = {
 	.disable_promotion_to_c1e = true,
 };
 
+static const struct idle_cpu idle_cpu_bdw = {
+	.state_table = bdw_cstates,
+	.disable_promotion_to_c1e = true,
+};
+
 static const struct idle_cpu idle_cpu_avn = {
 	.state_table = avn_cstates,
 	.disable_promotion_to_c1e = true,
@@ -658,7 +725,10 @@ static const struct x86_cpu_id intel_idle_ids[] = {
 	ICPU(0x3f, idle_cpu_hsw),
 	ICPU(0x45, idle_cpu_hsw),
 	ICPU(0x46, idle_cpu_hsw),
-	ICPU(0x4D, idle_cpu_avn),
+	ICPU(0x4d, idle_cpu_avn),
+	ICPU(0x3d, idle_cpu_bdw),
+	ICPU(0x4f, idle_cpu_bdw),
+	ICPU(0x56, idle_cpu_bdw),
 	{}
 };
 MODULE_DEVICE_TABLE(x86cpu, intel_idle_ids);
@@ -814,6 +884,11 @@ static int __init intel_idle_cpuidle_driver_init(void)
 	if (icpu->auto_demotion_disable_flags)
 		on_each_cpu(auto_demotion_disable, NULL, 1);
 
+	if (icpu->byt_auto_demotion_disable_flag) {
+		wrmsrl(MSR_CC6_DEMOTION_POLICY_CONFIG, 0);
+		wrmsrl(MSR_MC6_DEMOTION_POLICY_CONFIG, 0);
+	}
+
 	if (icpu->disable_promotion_to_c1e)	/* each-cpu is redundant */
 		on_each_cpu(c1e_promotion_disable, NULL, 1);