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@@ -46,8 +46,6 @@
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* to avoid complications with the lapic timer workaround.
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* Have not seen issues with suspend, but may need same workaround here.
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*
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- * There is currently no kernel-based automatic probing/loading mechanism
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- * if the driver is built as a module.
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*/
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/* un-comment DEBUG to enable pr_debug() statements */
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@@ -60,8 +58,9 @@
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#include <linux/sched.h>
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#include <linux/notifier.h>
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#include <linux/cpu.h>
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-#include <linux/module.h>
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+#include <linux/moduleparam.h>
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#include <asm/cpu_device_id.h>
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+#include <asm/intel-family.h>
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#include <asm/mwait.h>
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#include <asm/msr.h>
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@@ -827,6 +826,35 @@ static struct cpuidle_state bxt_cstates[] = {
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.enter = NULL }
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};
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+static struct cpuidle_state dnv_cstates[] = {
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+ {
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+ .name = "C1-DNV",
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+ .desc = "MWAIT 0x00",
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+ .flags = MWAIT2flg(0x00),
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+ .exit_latency = 2,
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+ .target_residency = 2,
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+ .enter = &intel_idle,
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+ .enter_freeze = intel_idle_freeze, },
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+ {
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+ .name = "C1E-DNV",
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+ .desc = "MWAIT 0x01",
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+ .flags = MWAIT2flg(0x01),
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+ .exit_latency = 10,
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+ .target_residency = 20,
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+ .enter = &intel_idle,
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+ .enter_freeze = intel_idle_freeze, },
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+ {
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+ .name = "C6-DNV",
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+ .desc = "MWAIT 0x20",
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+ .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
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+ .exit_latency = 50,
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+ .target_residency = 500,
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+ .enter = &intel_idle,
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+ .enter_freeze = intel_idle_freeze, },
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+ {
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+ .enter = NULL }
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+};
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+
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/**
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* intel_idle
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* @dev: cpuidle_device
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@@ -1016,45 +1044,50 @@ static const struct idle_cpu idle_cpu_bxt = {
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.disable_promotion_to_c1e = true,
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};
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+static const struct idle_cpu idle_cpu_dnv = {
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+ .state_table = dnv_cstates,
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+ .disable_promotion_to_c1e = true,
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+};
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+
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#define ICPU(model, cpu) \
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{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&cpu }
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static const struct x86_cpu_id intel_idle_ids[] __initconst = {
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- ICPU(0x1a, idle_cpu_nehalem),
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- ICPU(0x1e, idle_cpu_nehalem),
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- ICPU(0x1f, idle_cpu_nehalem),
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- ICPU(0x25, idle_cpu_nehalem),
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- ICPU(0x2c, idle_cpu_nehalem),
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- ICPU(0x2e, idle_cpu_nehalem),
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- ICPU(0x1c, idle_cpu_atom),
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- ICPU(0x26, idle_cpu_lincroft),
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- ICPU(0x2f, idle_cpu_nehalem),
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- ICPU(0x2a, idle_cpu_snb),
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- ICPU(0x2d, idle_cpu_snb),
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- ICPU(0x36, idle_cpu_atom),
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- ICPU(0x37, idle_cpu_byt),
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- ICPU(0x4c, idle_cpu_cht),
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- ICPU(0x3a, idle_cpu_ivb),
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- ICPU(0x3e, idle_cpu_ivt),
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- ICPU(0x3c, idle_cpu_hsw),
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- ICPU(0x3f, idle_cpu_hsw),
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- ICPU(0x45, idle_cpu_hsw),
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- ICPU(0x46, idle_cpu_hsw),
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- ICPU(0x4d, idle_cpu_avn),
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- ICPU(0x3d, idle_cpu_bdw),
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- ICPU(0x47, idle_cpu_bdw),
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- ICPU(0x4f, idle_cpu_bdw),
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- ICPU(0x56, idle_cpu_bdw),
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- ICPU(0x4e, idle_cpu_skl),
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- ICPU(0x5e, idle_cpu_skl),
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- ICPU(0x8e, idle_cpu_skl),
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- ICPU(0x9e, idle_cpu_skl),
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- ICPU(0x55, idle_cpu_skx),
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- ICPU(0x57, idle_cpu_knl),
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- ICPU(0x5c, idle_cpu_bxt),
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+ ICPU(INTEL_FAM6_NEHALEM_EP, idle_cpu_nehalem),
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+ ICPU(INTEL_FAM6_NEHALEM, idle_cpu_nehalem),
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+ ICPU(INTEL_FAM6_WESTMERE2, idle_cpu_nehalem),
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+ ICPU(INTEL_FAM6_WESTMERE, idle_cpu_nehalem),
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+ ICPU(INTEL_FAM6_WESTMERE_EP, idle_cpu_nehalem),
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+ ICPU(INTEL_FAM6_NEHALEM_EX, idle_cpu_nehalem),
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+ ICPU(INTEL_FAM6_ATOM_PINEVIEW, idle_cpu_atom),
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+ ICPU(INTEL_FAM6_ATOM_LINCROFT, idle_cpu_lincroft),
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+ ICPU(INTEL_FAM6_WESTMERE_EX, idle_cpu_nehalem),
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+ ICPU(INTEL_FAM6_SANDYBRIDGE, idle_cpu_snb),
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+ ICPU(INTEL_FAM6_SANDYBRIDGE_X, idle_cpu_snb),
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+ ICPU(INTEL_FAM6_ATOM_CEDARVIEW, idle_cpu_atom),
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+ ICPU(INTEL_FAM6_ATOM_SILVERMONT1, idle_cpu_byt),
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+ ICPU(INTEL_FAM6_ATOM_AIRMONT, idle_cpu_cht),
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+ ICPU(INTEL_FAM6_IVYBRIDGE, idle_cpu_ivb),
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+ ICPU(INTEL_FAM6_IVYBRIDGE_X, idle_cpu_ivt),
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+ ICPU(INTEL_FAM6_HASWELL_CORE, idle_cpu_hsw),
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+ ICPU(INTEL_FAM6_HASWELL_X, idle_cpu_hsw),
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+ ICPU(INTEL_FAM6_HASWELL_ULT, idle_cpu_hsw),
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+ ICPU(INTEL_FAM6_HASWELL_GT3E, idle_cpu_hsw),
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+ ICPU(INTEL_FAM6_ATOM_SILVERMONT2, idle_cpu_avn),
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+ ICPU(INTEL_FAM6_BROADWELL_CORE, idle_cpu_bdw),
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+ ICPU(INTEL_FAM6_BROADWELL_GT3E, idle_cpu_bdw),
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+ ICPU(INTEL_FAM6_BROADWELL_X, idle_cpu_bdw),
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+ ICPU(INTEL_FAM6_BROADWELL_XEON_D, idle_cpu_bdw),
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+ ICPU(INTEL_FAM6_SKYLAKE_MOBILE, idle_cpu_skl),
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+ ICPU(INTEL_FAM6_SKYLAKE_DESKTOP, idle_cpu_skl),
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+ ICPU(INTEL_FAM6_KABYLAKE_MOBILE, idle_cpu_skl),
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+ ICPU(INTEL_FAM6_KABYLAKE_DESKTOP, idle_cpu_skl),
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+ ICPU(INTEL_FAM6_SKYLAKE_X, idle_cpu_skx),
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+ ICPU(INTEL_FAM6_XEON_PHI_KNL, idle_cpu_knl),
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+ ICPU(INTEL_FAM6_ATOM_GOLDMONT, idle_cpu_bxt),
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+ ICPU(INTEL_FAM6_ATOM_DENVERTON, idle_cpu_dnv),
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{}
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};
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-MODULE_DEVICE_TABLE(x86cpu, intel_idle_ids);
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/*
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* intel_idle_probe()
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@@ -1261,13 +1294,13 @@ static void intel_idle_state_table_update(void)
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{
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switch (boot_cpu_data.x86_model) {
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- case 0x3e: /* IVT */
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+ case INTEL_FAM6_IVYBRIDGE_X:
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ivt_idle_state_table_update();
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break;
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- case 0x5c: /* BXT */
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+ case INTEL_FAM6_ATOM_GOLDMONT:
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bxt_idle_state_table_update();
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break;
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- case 0x5e: /* SKL-H */
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+ case INTEL_FAM6_SKYLAKE_DESKTOP:
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sklh_idle_state_table_update();
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break;
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}
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@@ -1415,34 +1448,12 @@ static int __init intel_idle_init(void)
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return 0;
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}
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+device_initcall(intel_idle_init);
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-static void __exit intel_idle_exit(void)
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-{
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- struct cpuidle_device *dev;
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- int i;
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-
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- cpu_notifier_register_begin();
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-
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- if (lapic_timer_reliable_states != LAPIC_TIMER_ALWAYS_RELIABLE)
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- on_each_cpu(__setup_broadcast_timer, (void *)false, 1);
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- __unregister_cpu_notifier(&cpu_hotplug_notifier);
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-
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- for_each_possible_cpu(i) {
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- dev = per_cpu_ptr(intel_idle_cpuidle_devices, i);
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- cpuidle_unregister_device(dev);
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- }
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-
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- cpu_notifier_register_done();
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-
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- cpuidle_unregister_driver(&intel_idle_driver);
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- free_percpu(intel_idle_cpuidle_devices);
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-}
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-
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-module_init(intel_idle_init);
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-module_exit(intel_idle_exit);
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-
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+/*
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+ * We are not really modular, but we used to support that. Meaning we also
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+ * support "intel_idle.max_cstate=..." at boot and also a read-only export of
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+ * it at /sys/module/intel_idle/parameters/max_cstate -- so using module_param
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+ * is the easiest way (currently) to continue doing that.
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+ */
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module_param(max_cstate, int, 0444);
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-
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-MODULE_AUTHOR("Len Brown <len.brown@intel.com>");
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-MODULE_DESCRIPTION("Cpuidle driver for Intel Hardware v" INTEL_IDLE_VERSION);
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-MODULE_LICENSE("GPL");
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