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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: Len Brown <len.brown@intel.com>
This commit is contained in:
Len Brown 2015-03-25 23:20:37 -04:00
parent 7dd0e0af64
commit 493f133f47
1 changed files with 69 additions and 0 deletions
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69
drivers/idle/intel_idle.c
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@ -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);