[PATCH 2/2] intel_idle: Support for Intel Xeon Phi Processor x200 Product Family
From: Len Brown <lenb@kernel.org>
Date: 2016-03-24 05:16:54
Also in:
lkml
Subsystem:
intel idle driver, the rest · Maintainers:
Rafael J. Wysocki, Artem Bityutskiy, Linus Torvalds
From: Dasaratharaman Chandramouli <redacted> 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 <redacted> [micah.barany@intel.com: adjusted values of residency and latency] Signed-off-by: Micah Barany <redacted> [hubert.chrzaniuk@intel.com: removed deprecated CPUIDLE_FLAG_TIME_VALID flag] Signed-off-by: Hubert Chrzaniuk <redacted> Signed-off-by: Pawel Karczewski <redacted> Signed-off-by: Len Brown <redacted> --- 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 146eed70b..ba947df 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);
--
2.7.1.339.g0233b80