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Commit 493f133f authored by Len Brown's avatar Len Brown
Browse files

intel_idle: Skylake Client Support 



Skylake Client CPU idle Power states (C-states)
are similar to the previous generation, Broadwell.
However, Skylake does get its own table with updated
worst-case latency and average energy-break-even residency values.

Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 7dd0e0af

drivers/idle/intel_idle.c

+69 −0
Original line number Diff line number Diff line
@@ -591,6 +591,67 @@ static struct cpuidle_state bdw_cstates[] = { 
		.enter = NULL }

};



static struct cpuidle_state skl_cstates[] = {

	{

		.name = "C1-SKL",

		.desc = "MWAIT 0x00",

		.flags = MWAIT2flg(0x00),

		.exit_latency = 2,

		.target_residency = 2,

		.enter = &intel_idle,

		.enter_freeze = intel_idle_freeze, },

	{

		.name = "C1E-SKL",

		.desc = "MWAIT 0x01",

		.flags = MWAIT2flg(0x01),

		.exit_latency = 10,

		.target_residency = 20,

		.enter = &intel_idle,

		.enter_freeze = intel_idle_freeze, },

	{

		.name = "C3-SKL",

		.desc = "MWAIT 0x10",

		.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,

		.exit_latency = 70,

		.target_residency = 100,

		.enter = &intel_idle,

		.enter_freeze = intel_idle_freeze, },

	{

		.name = "C6-SKL",

		.desc = "MWAIT 0x20",

		.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,

		.exit_latency = 75,

		.target_residency = 200,

		.enter = &intel_idle,

		.enter_freeze = intel_idle_freeze, },

	{

		.name = "C7s-SKL",

		.desc = "MWAIT 0x33",

		.flags = MWAIT2flg(0x33) | CPUIDLE_FLAG_TLB_FLUSHED,

		.exit_latency = 124,

		.target_residency = 800,

		.enter = &intel_idle,

		.enter_freeze = intel_idle_freeze, },

	{

		.name = "C8-SKL",

		.desc = "MWAIT 0x40",

		.flags = MWAIT2flg(0x40) | CPUIDLE_FLAG_TLB_FLUSHED,

		.exit_latency = 174,

		.target_residency = 800,

		.enter = &intel_idle,

		.enter_freeze = intel_idle_freeze, },

	{

		.name = "C10-SKL",

		.desc = "MWAIT 0x60",

		.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,

		.exit_latency = 890,

		.target_residency = 5000,

		.enter = &intel_idle,

		.enter_freeze = intel_idle_freeze, },

	{

		.enter = NULL }

};



static struct cpuidle_state atom_cstates[] = {

	{

		.name = "C1E-ATM",
@@ -810,6 +871,12 @@ static const struct idle_cpu idle_cpu_bdw = { 
	.disable_promotion_to_c1e = true,

};



static const struct idle_cpu idle_cpu_skl = {

	.state_table = skl_cstates,

	.disable_promotion_to_c1e = true,

};





static const struct idle_cpu idle_cpu_avn = {

	.state_table = avn_cstates,

	.disable_promotion_to_c1e = true,
@@ -844,6 +911,8 @@ static const struct x86_cpu_id intel_idle_ids[] __initconst = { 
	ICPU(0x47, idle_cpu_bdw),

	ICPU(0x4f, idle_cpu_bdw),

	ICPU(0x56, idle_cpu_bdw),

	ICPU(0x4e, idle_cpu_skl),

	ICPU(0x5e, idle_cpu_skl),

	{}

};

MODULE_DEVICE_TABLE(x86cpu, intel_idle_ids);