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| author | Len Brown <len.brown@intel.com> | 2015-03-27 20:54:01 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2015-03-31 21:57:15 -0400 |
| commit | cab07a5652d1d124b505c2b7ed21c6823295c5d7 (patch) | |
| tree | d3944fd4847add04e7afb337ecb3d4e152ea7618 /drivers/idle | |
| parent | d7ef76717322c8e2df7d4360b33faa9466cb1a0d (diff) | |
| download | lwn-cab07a5652d1d124b505c2b7ed21c6823295c5d7.tar.gz lwn-cab07a5652d1d124b505c2b7ed21c6823295c5d7.zip | |
intel_idle: Add support for the Airmont Core in the Cherrytrail and Braswell SOCs
Support C-states for the Airmont core in the Cherrytrail and Braswell SOCs.
The states are similar to those of Silvermont in Baytrail,
except both flavors of C6 states are faster.
Signed-off-by: Len Brown <len.brown@intel.com>
Cc: Kumar P Mahesh <mahesh.kumar.p@intel.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/idle')
| -rw-r--r-- | drivers/idle/intel_idle.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index 44d1d7920202..2ec8618c376f 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -253,6 +253,51 @@ static struct cpuidle_state byt_cstates[] = { .enter = NULL } }; +static struct cpuidle_state cht_cstates[] = { + { + .name = "C1-CHT", + .desc = "MWAIT 0x00", + .flags = MWAIT2flg(0x00), + .exit_latency = 1, + .target_residency = 1, + .enter = &intel_idle, + .enter_freeze = intel_idle_freeze, }, + { + .name = "C6N-CHT", + .desc = "MWAIT 0x58", + .flags = MWAIT2flg(0x58) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 80, + .target_residency = 275, + .enter = &intel_idle, + .enter_freeze = intel_idle_freeze, }, + { + .name = "C6S-CHT", + .desc = "MWAIT 0x52", + .flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 200, + .target_residency = 560, + .enter = &intel_idle, + .enter_freeze = intel_idle_freeze, }, + { + .name = "C7-CHT", + .desc = "MWAIT 0x60", + .flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 1200, + .target_residency = 4000, + .enter = &intel_idle, + .enter_freeze = intel_idle_freeze, }, + { + .name = "C7S-CHT", + .desc = "MWAIT 0x64", + .flags = MWAIT2flg(0x64) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 10000, + .target_residency = 20000, + .enter = &intel_idle, + .enter_freeze = intel_idle_freeze, }, + { + .enter = NULL } +}; + static struct cpuidle_state ivb_cstates[] = { { .name = "C1-IVB", @@ -740,6 +785,12 @@ 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, + .byt_auto_demotion_disable_flag = true, +}; + static const struct idle_cpu idle_cpu_ivb = { .state_table = ivb_cstates, .disable_promotion_to_c1e = true, @@ -782,6 +833,7 @@ static const struct x86_cpu_id intel_idle_ids[] = { ICPU(0x2d, idle_cpu_snb), ICPU(0x36, idle_cpu_atom), ICPU(0x37, idle_cpu_byt), + ICPU(0x4c, idle_cpu_cht), ICPU(0x3a, idle_cpu_ivb), ICPU(0x3e, idle_cpu_ivt), ICPU(0x3c, idle_cpu_hsw), |