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Date: Sat, 15 Aug 2015 23:25:48 -0400
From: Len Brown <lenb@...nel.org>
To: linux-pm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Len Brown <len.brown@...el.com>
Subject: [PATCH 7/7] intel_idle: Skylake Client Support
From: Len Brown <len.brown@...el.com>
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@...el.com>
---
drivers/idle/intel_idle.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 69 insertions(+)
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 008e943..3a3738f 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -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);
--
2.5.0.330.g130be8e
--
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