intel_idle: Support for Intel Xeon Phi Processor x200 Product Family (281baf7a) · Commits · 戴 / test

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>

drivers/idle/intel_idle.c

+25 −0

Original line number	Diff line number	Diff line
		@@ -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);

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