From 281baf7a702693deaa45c98ef0c5161006b48257 Mon Sep 17 00:00:00 2001 From: Dasaratharaman Chandramouli Date: Thu, 4 Sep 2014 17:22:54 -0700 Subject: [PATCH] intel_idle: Support for Intel Xeon Phi Processor x200 Product Family Enables "Intel(R) Xeon Phi(TM) Processor x200 Product Family" support, formerly code-named KNL. It is based on modified Intel Atom Silvermont microarchitecture. Signed-off-by: Dasaratharaman Chandramouli [micah.barany@intel.com: adjusted values of residency and latency] Signed-off-by: Micah Barany [hubert.chrzaniuk@intel.com: removed deprecated CPUIDLE_FLAG_TIME_VALID flag] Signed-off-by: Hubert Chrzaniuk Signed-off-by: Pawel Karczewski Signed-off-by: Len Brown --- drivers/idle/intel_idle.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index 146eed70bdf4..ba947df5a8c7 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -716,6 +716,26 @@ static struct cpuidle_state avn_cstates[] = { { .enter = NULL } }; +static struct cpuidle_state knl_cstates[] = { + { + .name = "C1-KNL", + .desc = "MWAIT 0x00", + .flags = MWAIT2flg(0x00), + .exit_latency = 1, + .target_residency = 2, + .enter = &intel_idle, + .enter_freeze = intel_idle_freeze }, + { + .name = "C6-KNL", + .desc = "MWAIT 0x10", + .flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 120, + .target_residency = 500, + .enter = &intel_idle, + .enter_freeze = intel_idle_freeze }, + { + .enter = NULL } +}; /** * intel_idle @@ -890,6 +910,10 @@ static const struct idle_cpu idle_cpu_avn = { .disable_promotion_to_c1e = true, }; +static const struct idle_cpu idle_cpu_knl = { + .state_table = knl_cstates, +}; + #define ICPU(model, cpu) \ { X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&cpu } @@ -921,6 +945,7 @@ static const struct x86_cpu_id intel_idle_ids[] __initconst = { ICPU(0x56, idle_cpu_bdw), ICPU(0x4e, idle_cpu_skl), ICPU(0x5e, idle_cpu_skl), + ICPU(0x57, idle_cpu_knl), {} }; MODULE_DEVICE_TABLE(x86cpu, intel_idle_ids);