/* * trace_export.c - export basic ftrace utilities to user space * * Copyright (C) 2009 Steven Rostedt */ #include #include #include #include #include #include #include #include "trace_output.h" #undef TRACE_SYSTEM #define TRACE_SYSTEM ftrace /* * The FTRACE_ENTRY_REG macro allows ftrace entry to define register * function and thus become accesible via perf. */ #undef FTRACE_ENTRY_REG #define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, \ filter, regfn) \ FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \ filter) /* not needed for this file */ #undef __field_struct #define __field_struct(type, item) #undef __field #define __field(type, item) type item; #undef __field_desc #define __field_desc(type, container, item) type item; #undef __array #define __array(type, item, size) type item[size]; #undef __array_desc #define __array_desc(type, container, item, size) type item[size]; #undef __dynamic_array #define __dynamic_array(type, item) type item[]; #undef F_STRUCT #define F_STRUCT(args...) args #undef F_printk #define F_printk(fmt, args...) fmt, args #undef FTRACE_ENTRY #define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \ struct ____ftrace_##name { \ tstruct \ }; \ static void __always_unused ____ftrace_check_##name(void) \ { \ struct ____ftrace_##name *__entry = NULL; \ \ /* force compile-time check on F_printk() */ \ printk(print); \ } #undef FTRACE_ENTRY_DUP #define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print, filter) \ FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \ filter) #include "trace_entries.h" #undef __field #define __field(type, item) \ ret = trace_define_field(event_call, #type, #item, \ offsetof(typeof(field), item), \ sizeof(field.item), \ is_signed_type(type), filter_type); \ if (ret) \ return ret; #undef __field_desc #define __field_desc(type, container, item) \ ret = trace_define_field(event_call, #type, #item, \ offsetof(typeof(field), \ container.item), \ sizeof(field.container.item), \ is_signed_type(type), filter_type); \ if (ret) \ return ret; #undef __array #define __array(type, item, len) \ do { \ char *type_str = #type"["__stringify(len)"]"; \ BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ ret = trace_define_field(event_call, type_str, #item, \ offsetof(typeof(field), item), \ sizeof(field.item), \ is_signed_type(type), filter_type); \ if (ret) \ return ret; \ } while (0); #undef __array_desc #define __array_desc(type, container, item, len) \ BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ ret = trace_define_field(event_call, #type "[" #len "]", #item, \ offsetof(typeof(field), \ container.item), \ sizeof(field.container.item), \ is_signed_type(type), filter_type); \ if (ret) \ return ret; #undef __dynamic_array #define __dynamic_array(type, item) \ ret = trace_define_field(event_call, #type, #item, \ offsetof(typeof(field), item), \ 0, is_signed_type(type), filter_type);\ if (ret) \ return ret; #undef FTRACE_ENTRY #define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \ static int __init \ ftrace_define_fields_##name(struct trace_event_call *event_call) \ { \ struct struct_name field; \ int ret; \ int filter_type = filter; \ \ tstruct; \ \ return ret; \ } #include "trace_entries.h" #undef __entry #define __entry REC #undef __field #define __field(type, item) #undef __field_desc #define __field_desc(type, container, item) #undef __array #define __array(type, item, len) #undef __array_desc #define __array_desc(type, container, item, len) #undef __dynamic_array #define __dynamic_array(type, item) #undef F_printk #define F_printk(fmt, args...) __stringify(fmt) ", " __stringify(args) #undef FTRACE_ENTRY_REG #define FTRACE_ENTRY_REG(call, struct_name, etype, tstruct, print, filter,\ regfn) \ \ struct trace_event_class __refdata event_class_ftrace_##call = { \ .system = __stringify(TRACE_SYSTEM), \ .define_fields = ftrace_define_fields_##call, \ .fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\ .reg = regfn, \ }; \ \ struct trace_event_call __used event_##call = { \ .class = &event_class_ftrace_##call, \ { \ .name = #call, \ }, \ .event.type = etype, \ .print_fmt = print, \ .flags = TRACE_EVENT_FL_IGNORE_ENABLE, \ }; \ struct trace_event_call __used \ __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call; #undef FTRACE_ENTRY #define FTRACE_ENTRY(call, struct_name, etype, tstruct, print, filter) \ FTRACE_ENTRY_REG(call, struct_name, etype, \ PARAMS(tstruct), PARAMS(print), filter, NULL) bool ftrace_event_is_function(struct trace_event_call *call) { return call == &event_function; } #include "trace_entries.h" terRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-02-04 00:11:08 +0100 commit6e978b22efa1db9f6e71b24440b5f1d93e968ee3 (patch) treec666f7a26b860674848949e39a610222b0723f89 /drivers/usb/musb/da8xx.c parent3c223c19aea85d3dda1416c187915f4a30b04b1f (diff)
cpufreq: intel_pstate: Disable energy efficiency optimization
Some Kabylake desktop processors may not reach max turbo when running in HWP mode, even if running under sustained 100% utilization. This occurs when the HWP.EPP (Energy Performance Preference) is set to "balance_power" (0x80) -- the default on most systems. It occurs because the platform BIOS may erroneously enable an energy-efficiency setting -- MSR_IA32_POWER_CTL BIT-EE, which is not recommended to be enabled on this SKU. On the failing systems, this BIOS issue was not discovered when the desktop motherboard was tested with Windows, because the BIOS also neglects to provide the ACPI/CPPC table, that Windows requires to enable HWP, and so Windows runs in legacy P-state mode, where this setting has no effect. Linux' intel_pstate driver does not require ACPI/CPPC to enable HWP, and so it runs in HWP mode, exposing this incorrect BIOS configuration. There are several ways to address this problem. First, Linux can also run in legacy P-state mode on this system. As intel_pstate is how Linux enables HWP, booting with "intel_pstate=disable" will run in acpi-cpufreq/ondemand legacy p-state mode. Or second, the "performance" governor can be used with intel_pstate, which will modify HWP.EPP to 0. Or third, starting in 4.10, the /sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference attribute in can be updated from "balance_power" to "performance". Or fourth, apply this patch, which fixes the erroneous setting of MSR_IA32_POWER_CTL BIT_EE on this model, allowing the default configuration to function as designed. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Reviewed-by: Len Brown <len.brown@intel.com> Cc: 4.6+ <stable@vger.kernel.org> # 4.6+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/usb/musb/da8xx.c')