From: Dasaratharaman Chandramouli <dasaratharaman.chandramo...@intel.com>

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 
<dasaratharaman.chandramo...@intel.com>
[micah.bar...@intel.com: adjusted values of residency and latency]
Signed-off-by: Micah Barany <micah.bar...@intel.com>
[hubert.chrzan...@intel.com: removed deprecated CPUIDLE_FLAG_TIME_VALID flag]
Signed-off-by: Hubert Chrzaniuk <hubert.chrzan...@intel.com>
Signed-off-by: Pawel Karczewski <pawel.karczew...@intel.com>
Signed-off-by: Len Brown <len.br...@intel.com>

(cherry picked from commit 00c395337eb43bdb559d0300dfe5f4b1061f296d)
Signed-off-by: Yu, Ong Hock <ong.hock...@intel.com>
---
 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 ba1cd51..fbe04c1 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);
-- 
1.9.1

-- 
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