From: Mahesh Kumar P <mahesh.kuma...@intel.com>
Cherrytrail/Braswell is a successor of Intel Baytrail but has slighly
different CPU idle values and latencies.
Signed-off-by: Kumar P Mahesh <mahesh.kuma...@intel.com>
Signed-off-by: Alan Cox <a...@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerb...@linux.intel.com>
---
I learned from Mahesh that C1e, C4 and S0i2 states are deprecated so those
are now removed.
drivers/idle/intel_idle.c | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 9b7ee7e427df..e472580c1826 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -197,6 +197,42 @@ static struct cpuidle_state snb_cstates[] = {
.enter = NULL }
};
+static struct cpuidle_state cht_cstates[] = {
+ { /* MWAIT C1 */
+ .name = "C1-CHT",
+ .desc = "MWAIT 0x00",
+ .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID,
+ .exit_latency = 1,
+ .target_residency = 4,
+ .enter = &intel_idle },
+ { /* MWAIT C6 */
+ .name = "C6-CHT",
+ .desc = "MWAIT 0x52",
+ .flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TIME_VALID
+ | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 140,
+ .target_residency = 560,
+ .enter = &intel_idle },
+ { /* MWAIT C7-S0i1 */
+ .name = "S0i1-CHT",
+ .desc = "MWAIT 0x60",
+ .flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TIME_VALID
+ | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 1200,
+ .target_residency = 4000,
+ .enter = &intel_idle },
+ { /* MWAIT C9-S0i3 */
+ .name = "S0i3-CHT",
+ .desc = "MWAIT 0x64",
+ .flags = MWAIT2flg(0x64) | CPUIDLE_FLAG_TIME_VALID
+ | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 10000,
+ .target_residency = 20000,
+ .enter = &intel_idle },
+ {
+ .enter = NULL }
+};
+
static struct cpuidle_state byt_cstates[] = {
{
.name = "C1-BYT",
@@ -677,6 +713,11 @@ static const struct idle_cpu idle_cpu_byt = {
.byt_auto_demotion_disable_flag = true,
};
+static const struct idle_cpu idle_cpu_cht = {
+ .state_table = cht_cstates,
+ .disable_promotion_to_c1e = true,
+};
+
static const struct idle_cpu idle_cpu_ivb = {
.state_table = ivb_cstates,
.disable_promotion_to_c1e = true,
@@ -725,6 +766,7 @@ 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(0x4c, idle_cpu_cht),
ICPU(0x4d, idle_cpu_avn),
ICPU(0x3d, idle_cpu_bdw),
ICPU(0x4f, idle_cpu_bdw),
--
2.1.0
--
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