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intel_idle: Support for Intel Xeon Phi Processor x200 Product Family

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[ Upstream commit 281baf7a702693deaa45c98ef0c5161006b48257 ]

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.chandramouli@intel.com>
[micah.barany@intel.com: adjusted values of residency and latency]
Signed-off-by: Micah Barany <micah.barany@intel.com>
[hubert.chrzaniuk@intel.com: removed deprecated CPUIDLE_FLAG_TIME_VALID flag]
Signed-off-by: Hubert Chrzaniuk <hubert.chrzaniuk@intel.com>
Signed-off-by: Pawel Karczewski <pawel.karczewski@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dasaratharaman Chandramouli 2014-09-04 17:22:54 -07:00 • committed by Greg Kroah-Hartman
parent 321aeea695
commit 25db8d1cb3
1 changed files with 25 additions and 0 deletions
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25
drivers/idle/intel_idle.c
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@ -716,6 +716,26 @@ static struct cpuidle_state avn_cstates[] = {
{ {
.enter = NULL } .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 * intel_idle
@ -890,6 +910,10 @@ static const struct idle_cpu idle_cpu_avn = {
.disable_promotion_to_c1e = true, .disable_promotion_to_c1e = true,
}; };
static const struct idle_cpu idle_cpu_knl = {
.state_table = knl_cstates,
};
#define ICPU(model, cpu) \ #define ICPU(model, cpu) \
{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&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(0x56, idle_cpu_bdw),
ICPU(0x4e, idle_cpu_skl), ICPU(0x4e, idle_cpu_skl),
ICPU(0x5e, idle_cpu_skl), ICPU(0x5e, idle_cpu_skl),
ICPU(0x57, idle_cpu_knl),
{} {}
}; };
MODULE_DEVICE_TABLE(x86cpu, intel_idle_ids); MODULE_DEVICE_TABLE(x86cpu, intel_idle_ids);