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Re: [Xen-devel] [RFC PATCH 01/13] cpufreq: move cpufreq.h file to the xen/include/cpufreq location



On Tue, Oct 7, 2014 at 5:22 PM, Andrew Cooper <andrew.cooper3@xxxxxxxxxx> wrote:
>
> On 07/10/14 15:19, Oleksandr Dmytryshyn wrote:
> > Cpufreq driver should be more generalizable (not ACPI-specific).
> > Thus this file should be placed to the proper location.
> >
> > Signed-off-by: Oleksandr Dmytryshyn <oleksandr.dmytryshyn@xxxxxxxxxxxxxxx>
>
> In the future, please prepare patch series with the -M option which will
> detect the move of cpufreq.h as a rename, and vastly reduce the size of
> the patches.
I'll do this.

>
> ~Andrew
>
> > ---
> >  xen/arch/x86/acpi/cpu_idle.c                 |   2 +-
> >  xen/arch/x86/acpi/cpufreq/cpufreq.c          |   2 +-
> >  xen/arch/x86/acpi/cpufreq/powernow.c         |   2 +-
> >  xen/arch/x86/acpi/power.c                    |   2 +-
> >  xen/arch/x86/cpu/mwait-idle.c                |   2 +-
> >  xen/drivers/acpi/pmstat.c                    |   2 +-
> >  xen/drivers/cpufreq/cpufreq.c                |   2 +-
> >  xen/drivers/cpufreq/cpufreq_misc_governors.c |   2 +-
> >  xen/drivers/cpufreq/cpufreq_ondemand.c       |   4 +-
> >  xen/drivers/cpufreq/utility.c                |   2 +-
> >  xen/include/acpi/cpufreq/cpufreq.h           | 258 
> > --------------------------
> >  xen/include/cpufreq/cpufreq.h                | 261 
> > +++++++++++++++++++++++++++
> >  12 files changed, 272 insertions(+), 269 deletions(-)
> >  delete mode 100644 xen/include/acpi/cpufreq/cpufreq.h
> >  create mode 100644 xen/include/cpufreq/cpufreq.h
> >
> > diff --git a/xen/arch/x86/acpi/cpu_idle.c b/xen/arch/x86/acpi/cpu_idle.c
> > index 597befa..98726ad 100644
> > --- a/xen/arch/x86/acpi/cpu_idle.c
> > +++ b/xen/arch/x86/acpi/cpu_idle.c
> > @@ -51,7 +51,7 @@
> >  #include <xen/softirq.h>
> >  #include <public/platform.h>
> >  #include <public/sysctl.h>
> > -#include <acpi/cpufreq/cpufreq.h>
> > +#include <cpufreq/cpufreq.h>
> >  #include <asm/apic.h>
> >  #include <asm/cpuidle.h>
> >  #include <asm/mwait.h>
> > diff --git a/xen/arch/x86/acpi/cpufreq/cpufreq.c 
> > b/xen/arch/x86/acpi/cpufreq/cpufreq.c
> > index 4a6aeb3..4569d49 100644
> > --- a/xen/arch/x86/acpi/cpufreq/cpufreq.c
> > +++ b/xen/arch/x86/acpi/cpufreq/cpufreq.c
> > @@ -42,7 +42,7 @@
> >  #include <asm/percpu.h>
> >  #include <asm/cpufeature.h>
> >  #include <acpi/acpi.h>
> > -#include <acpi/cpufreq/cpufreq.h>
> > +#include <cpufreq/cpufreq.h>
> >
> >  enum {
> >      UNDEFINED_CAPABLE = 0,
> > diff --git a/xen/arch/x86/acpi/cpufreq/powernow.c 
> > b/xen/arch/x86/acpi/cpufreq/powernow.c
> > index 2c9fea2..0462e31 100644
> > --- a/xen/arch/x86/acpi/cpufreq/powernow.c
> > +++ b/xen/arch/x86/acpi/cpufreq/powernow.c
> > @@ -36,7 +36,7 @@
> >  #include <asm/percpu.h>
> >  #include <asm/cpufeature.h>
> >  #include <acpi/acpi.h>
> > -#include <acpi/cpufreq/cpufreq.h>
> > +#include <cpufreq/cpufreq.h>
> >
> >  #define CPUID_6_ECX_APERFMPERF_CAPABILITY       (0x1)
> >  #define CPUID_FREQ_VOLT_CAPABILITIES    0x80000007
> > diff --git a/xen/arch/x86/acpi/power.c b/xen/arch/x86/acpi/power.c
> > index f41f0de..d139e96 100644
> > --- a/xen/arch/x86/acpi/power.c
> > +++ b/xen/arch/x86/acpi/power.c
> > @@ -29,7 +29,7 @@
> >  #include <asm/tboot.h>
> >  #include <asm/apic.h>
> >  #include <asm/io_apic.h>
> > -#include <acpi/cpufreq/cpufreq.h>
> > +#include <cpufreq/cpufreq.h>
> >
> >  uint32_t system_reset_counter = 1;
> >
> > diff --git a/xen/arch/x86/cpu/mwait-idle.c b/xen/arch/x86/cpu/mwait-idle.c
> > index 85179f2..a00c19a 100644
> > --- a/xen/arch/x86/cpu/mwait-idle.c
> > +++ b/xen/arch/x86/cpu/mwait-idle.c
> > @@ -59,7 +59,7 @@
> >  #include <asm/hpet.h>
> >  #include <asm/mwait.h>
> >  #include <asm/msr.h>
> > -#include <acpi/cpufreq/cpufreq.h>
> > +#include <cpufreq/cpufreq.h>
> >
> >  #define MWAIT_IDLE_VERSION "0.4"
> >  #undef PREFIX
> > diff --git a/xen/drivers/acpi/pmstat.c b/xen/drivers/acpi/pmstat.c
> > index daac2da..bd6ca43 100644
> > --- a/xen/drivers/acpi/pmstat.c
> > +++ b/xen/drivers/acpi/pmstat.c
> > @@ -40,7 +40,7 @@
> >  #include <xen/acpi.h>
> >
> >  #include <public/sysctl.h>
> > -#include <acpi/cpufreq/cpufreq.h>
> > +#include <cpufreq/cpufreq.h>
> >  #include <xen/pmstat.h>
> >
> >  DEFINE_PER_CPU_READ_MOSTLY(struct pm_px *, cpufreq_statistic_data);
> > diff --git a/xen/drivers/cpufreq/cpufreq.c b/xen/drivers/cpufreq/cpufreq.c
> > index ab66884..884d2bb 100644
> > --- a/xen/drivers/cpufreq/cpufreq.c
> > +++ b/xen/drivers/cpufreq/cpufreq.c
> > @@ -44,7 +44,7 @@
> >  #include <asm/processor.h>
> >  #include <asm/percpu.h>
> >  #include <acpi/acpi.h>
> > -#include <acpi/cpufreq/cpufreq.h>
> > +#include <cpufreq/cpufreq.h>
> >
> >  static unsigned int __read_mostly usr_min_freq;
> >  static unsigned int __read_mostly usr_max_freq;
> > diff --git a/xen/drivers/cpufreq/cpufreq_misc_governors.c 
> > b/xen/drivers/cpufreq/cpufreq_misc_governors.c
> > index 746bbcd..881e4bb 100644
> > --- a/xen/drivers/cpufreq/cpufreq_misc_governors.c
> > +++ b/xen/drivers/cpufreq/cpufreq_misc_governors.c
> > @@ -18,7 +18,7 @@
> >  #include <xen/init.h>
> >  #include <xen/percpu.h>
> >  #include <xen/sched.h>
> > -#include <acpi/cpufreq/cpufreq.h>
> > +#include <cpufreq/cpufreq.h>
> >
> >  /*
> >   * cpufreq userspace governor
> > diff --git a/xen/drivers/cpufreq/cpufreq_ondemand.c 
> > b/xen/drivers/cpufreq/cpufreq_ondemand.c
> > index 7fdba03..f299116 100644
> > --- a/xen/drivers/cpufreq/cpufreq_ondemand.c
> > +++ b/xen/drivers/cpufreq/cpufreq_ondemand.c
> > @@ -1,5 +1,5 @@
> >  /*
> > - *  xen/arch/x86/acpi/cpufreq/cpufreq_ondemand.c
> > + *  xen/drivers/cpufreq/cpufreq_ondemand.c
> >   *
> >   *  Copyright (C)  2001 Russell King
> >   *            (C)  2003 Venkatesh Pallipadi 
> > <venkatesh.pallipadi@xxxxxxxxx>.
> > @@ -18,7 +18,7 @@
> >  #include <xen/types.h>
> >  #include <xen/sched.h>
> >  #include <xen/timer.h>
> > -#include <acpi/cpufreq/cpufreq.h>
> > +#include <cpufreq/cpufreq.h>
> >
> >  #define DEF_FREQUENCY_UP_THRESHOLD              (80)
> >  #define MIN_FREQUENCY_UP_THRESHOLD              (11)
> > diff --git a/xen/drivers/cpufreq/utility.c b/xen/drivers/cpufreq/utility.c
> > index 519f862..c9150a1 100644
> > --- a/xen/drivers/cpufreq/utility.c
> > +++ b/xen/drivers/cpufreq/utility.c
> > @@ -28,7 +28,7 @@
> >  #include <xen/sched.h>
> >  #include <xen/timer.h>
> >  #include <xen/trace.h>
> > -#include <acpi/cpufreq/cpufreq.h>
> > +#include <cpufreq/cpufreq.h>
> >  #include <public/sysctl.h>
> >
> >  struct cpufreq_driver   *cpufreq_driver;
> > diff --git a/xen/include/acpi/cpufreq/cpufreq.h 
> > b/xen/include/acpi/cpufreq/cpufreq.h
> > deleted file mode 100644
> > index f96c3e4..0000000
> > --- a/xen/include/acpi/cpufreq/cpufreq.h
> > +++ /dev/null
> > @@ -1,258 +0,0 @@
> > -/*
> > - *  xen/include/acpi/cpufreq/cpufreq.h
> > - *
> > - *  Copyright (C) 2001 Russell King
> > - *            (C) 2002 - 2003 Dominik Brodowski <linux@xxxxxxxx>
> > - *
> > - * $Id: cpufreq.h,v 1.36 2003/01/20 17:31:48 db Exp $
> > - *
> > - * This program is free software; you can redistribute it and/or modify
> > - * it under the terms of the GNU General Public License version 2 as
> > - * published by the Free Software Foundation.
> > - */
> > -
> > -#ifndef __XEN_CPUFREQ_PM_H__
> > -#define __XEN_CPUFREQ_PM_H__
> > -
> > -#include <xen/types.h>
> > -#include <xen/list.h>
> > -#include <xen/cpumask.h>
> > -
> > -#include "processor_perf.h"
> > -
> > -DECLARE_PER_CPU(spinlock_t, cpufreq_statistic_lock);
> > -
> > -extern bool_t cpufreq_verbose;
> > -
> > -struct cpufreq_governor;
> > -
> > -struct acpi_cpufreq_data {
> > -    struct processor_performance *acpi_data;
> > -    struct cpufreq_frequency_table *freq_table;
> > -    unsigned int arch_cpu_flags;
> > -};
> > -
> > -extern struct acpi_cpufreq_data *cpufreq_drv_data[NR_CPUS];
> > -
> > -struct cpufreq_cpuinfo {
> > -    unsigned int        max_freq;
> > -    unsigned int        second_max_freq;    /* P1 if Turbo Mode is on */
> > -    unsigned int        min_freq;
> > -    unsigned int        transition_latency; /* in 10^(-9) s = nanoseconds 
> > */
> > -};
> > -
> > -struct cpufreq_policy {
> > -    cpumask_var_t       cpus;          /* affected CPUs */
> > -    unsigned int        shared_type;   /* ANY or ALL affected CPUs
> > -                                          should set cpufreq */
> > -    unsigned int        cpu;           /* cpu nr of registered CPU */
> > -    struct cpufreq_cpuinfo    cpuinfo;
> > -
> > -    unsigned int        min;    /* in kHz */
> > -    unsigned int        max;    /* in kHz */
> > -    unsigned int        cur;    /* in kHz, only needed if cpufreq
> > -                                 * governors are used */
> > -    struct cpufreq_governor     *governor;
> > -
> > -    bool_t              resume; /* flag for cpufreq 1st run
> > -                                 * S3 wakeup, hotplug cpu, etc */
> > -    s8                  turbo;  /* tristate flag: 0 for unsupported
> > -                                 * -1 for disable, 1 for enabled
> > -                                 * See CPUFREQ_TURBO_* below for defines */
> > -    bool_t              aperf_mperf; /* CPU has APERF/MPERF MSRs */
> > -};
> > -DECLARE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_policy);
> > -
> > -extern int __cpufreq_set_policy(struct cpufreq_policy *data,
> > -                                struct cpufreq_policy *policy);
> > -
> > -void cpufreq_cmdline_parse(char *);
> > -
> > -#define CPUFREQ_SHARED_TYPE_NONE (0) /* None */
> > -#define CPUFREQ_SHARED_TYPE_HW   (1) /* HW does needed coordination */
> > -#define CPUFREQ_SHARED_TYPE_ALL  (2) /* All dependent CPUs should set freq 
> > */
> > -#define CPUFREQ_SHARED_TYPE_ANY  (3) /* Freq can be set from any dependent 
> > CPU*/
> > -
> > -/******************** cpufreq transition notifiers *******************/
> > -
> > -struct cpufreq_freqs {
> > -    unsigned int cpu;    /* cpu nr */
> > -    unsigned int old;
> > -    unsigned int new;
> > -    u8 flags;            /* flags of cpufreq_driver, see below. */
> > -};
> > -
> > -
> > -/*********************************************************************
> > - *                          CPUFREQ GOVERNORS                        *
> > - *********************************************************************/
> > -
> > -#define CPUFREQ_GOV_START  1
> > -#define CPUFREQ_GOV_STOP   2
> > -#define CPUFREQ_GOV_LIMITS 3
> > -
> > -struct cpufreq_governor {
> > -    char    name[CPUFREQ_NAME_LEN];
> > -    int     (*governor)(struct cpufreq_policy *policy,
> > -                        unsigned int event);
> > -    bool_t  (*handle_option)(const char *name, const char *value);
> > -    struct list_head governor_list;
> > -};
> > -
> > -extern struct cpufreq_governor *cpufreq_opt_governor;
> > -extern struct cpufreq_governor cpufreq_gov_dbs;
> > -extern struct cpufreq_governor cpufreq_gov_userspace;
> > -extern struct cpufreq_governor cpufreq_gov_performance;
> > -extern struct cpufreq_governor cpufreq_gov_powersave;
> > -
> > -extern struct list_head cpufreq_governor_list;
> > -
> > -extern int cpufreq_register_governor(struct cpufreq_governor *governor);
> > -extern struct cpufreq_governor *__find_governor(const char *governor);
> > -#define CPUFREQ_DEFAULT_GOVERNOR &cpufreq_gov_dbs
> > -
> > -/* pass a target to the cpufreq driver */
> > -extern int __cpufreq_driver_target(struct cpufreq_policy *policy,
> > -                                   unsigned int target_freq,
> > -                                   unsigned int relation);
> > -
> > -#define GOV_GETAVG     1
> > -#define USR_GETAVG     2
> > -extern int cpufreq_driver_getavg(unsigned int cpu, unsigned int flag);
> > -
> > -#define CPUFREQ_TURBO_DISABLED      -1
> > -#define CPUFREQ_TURBO_UNSUPPORTED   0
> > -#define CPUFREQ_TURBO_ENABLED       1
> > -
> > -extern int cpufreq_update_turbo(int cpuid, int new_state);
> > -extern int cpufreq_get_turbo_status(int cpuid);
> > -
> > -static __inline__ int
> > -__cpufreq_governor(struct cpufreq_policy *policy, unsigned int event)
> > -{
> > -    return policy->governor->governor(policy, event);
> > -}
> > -
> > -
> > -/*********************************************************************
> > - *                      CPUFREQ DRIVER INTERFACE                     *
> > - *********************************************************************/
> > -
> > -#define CPUFREQ_RELATION_L 0  /* lowest frequency at or above target */
> > -#define CPUFREQ_RELATION_H 1  /* highest frequency below or at target */
> > -
> > -struct cpufreq_driver {
> > -    char   name[CPUFREQ_NAME_LEN];
> > -    int    (*init)(struct cpufreq_policy *policy);
> > -    int    (*verify)(struct cpufreq_policy *policy);
> > -    int    (*update)(int cpuid, struct cpufreq_policy *policy);
> > -    int    (*target)(struct cpufreq_policy *policy,
> > -                     unsigned int target_freq,
> > -                     unsigned int relation);
> > -    unsigned int    (*get)(unsigned int cpu);
> > -    unsigned int    (*getavg)(unsigned int cpu, unsigned int flag);
> > -    int    (*exit)(struct cpufreq_policy *policy);
> > -};
> > -
> > -extern struct cpufreq_driver *cpufreq_driver;
> > -
> > -static __inline__
> > -int cpufreq_register_driver(struct cpufreq_driver *driver_data)
> > -{
> > -    if (!driver_data         ||
> > -        !driver_data->init   ||
> > -        !driver_data->exit   ||
> > -        !driver_data->verify ||
> > -        !driver_data->target)
> > -        return -EINVAL;
> > -
> > -    if (cpufreq_driver)
> > -        return -EBUSY;
> > -
> > -    cpufreq_driver = driver_data;
> > -    return 0;
> > -}
> > -
> > -static __inline__
> > -int cpufreq_unregister_driver(struct cpufreq_driver *driver)
> > -{
> > -    if (!cpufreq_driver || (driver != cpufreq_driver))
> > -        return -EINVAL;
> > -
> > -    cpufreq_driver = NULL;
> > -    return 0;
> > -}
> > -
> > -static __inline__
> > -void cpufreq_verify_within_limits(struct cpufreq_policy *policy,
> > -                                  unsigned int min, unsigned int max)
> > -{
> > -    if (policy->min < min)
> > -        policy->min = min;
> > -    if (policy->max < min)
> > -        policy->max = min;
> > -    if (policy->min > max)
> > -        policy->min = max;
> > -    if (policy->max > max)
> > -        policy->max = max;
> > -    if (policy->min > policy->max)
> > -        policy->min = policy->max;
> > -    return;
> > -}
> > -
> > -
> > -/*********************************************************************
> > - *                     FREQUENCY TABLE HELPERS                       *
> > - *********************************************************************/
> > -
> > -#define CPUFREQ_ENTRY_INVALID ~0
> > -#define CPUFREQ_TABLE_END     ~1
> > -
> > -struct cpufreq_frequency_table {
> > -    unsigned int    index;     /* any */
> > -    unsigned int    frequency; /* kHz - doesn't need to be in ascending
> > -                                * order */
> > -};
> > -
> > -int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
> > -                   struct cpufreq_frequency_table *table);
> > -
> > -int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
> > -                   struct cpufreq_frequency_table *table);
> > -
> > -int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
> > -                   struct cpufreq_frequency_table *table,
> > -                   unsigned int target_freq,
> > -                   unsigned int relation,
> > -                   unsigned int *index);
> > -
> > -
> > -/*********************************************************************
> > - *                     UNIFIED DEBUG HELPERS                         *
> > - *********************************************************************/
> > -
> > -struct cpu_dbs_info_s {
> > -    uint64_t prev_cpu_idle;
> > -    uint64_t prev_cpu_wall;
> > -    struct cpufreq_policy *cur_policy;
> > -    struct cpufreq_frequency_table *freq_table;
> > -    int cpu;
> > -    unsigned int enable:1;
> > -    unsigned int stoppable:1;
> > -    unsigned int turbo_enabled:1;
> > -};
> > -
> > -int cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int 
> > event);
> > -int get_cpufreq_ondemand_para(uint32_t *sampling_rate_max,
> > -                              uint32_t *sampling_rate_min,
> > -                              uint32_t *sampling_rate,
> > -                              uint32_t *up_threshold);
> > -int write_ondemand_sampling_rate(unsigned int sampling_rate);
> > -int write_ondemand_up_threshold(unsigned int up_threshold);
> > -
> > -int write_userspace_scaling_setspeed(unsigned int cpu, unsigned int freq);
> > -
> > -void cpufreq_dbs_timer_suspend(void);
> > -void cpufreq_dbs_timer_resume(void);
> > -
> > -#endif /* __XEN_CPUFREQ_PM_H__ */
> > diff --git a/xen/include/cpufreq/cpufreq.h b/xen/include/cpufreq/cpufreq.h
> > new file mode 100644
> > index 0000000..04716f9
> > --- /dev/null
> > +++ b/xen/include/cpufreq/cpufreq.h
> > @@ -0,0 +1,261 @@
> > +/*
> > + *  xen/include/cpufreq/cpufreq.h
> > + *
> > + *  Copyright (C) 2001 Russell King
> > + *            (C) 2002 - 2003 Dominik Brodowski <linux@xxxxxxxx>
> > + *
> > + * $Id: cpufreq.h,v 1.36 2003/01/20 17:31:48 db Exp $
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License version 2 as
> > + * published by the Free Software Foundation.
> > + */
> > +
> > +#ifndef __XEN_CPUFREQ_PM_H__
> > +#define __XEN_CPUFREQ_PM_H__
> > +
> > +#include <xen/types.h>
> > +#include <xen/list.h>
> > +#include <xen/percpu.h>
> > +#include <xen/spinlock.h>
> > +#include <xen/errno.h>
> > +#include <xen/cpumask.h>
> > +
> > +#include <acpi/cpufreq/processor_perf.h>
> > +
> > +DECLARE_PER_CPU(spinlock_t, cpufreq_statistic_lock);
> > +
> > +extern bool_t cpufreq_verbose;
> > +
> > +struct cpufreq_governor;
> > +
> > +struct acpi_cpufreq_data {
> > +    struct processor_performance *acpi_data;
> > +    struct cpufreq_frequency_table *freq_table;
> > +    unsigned int arch_cpu_flags;
> > +};
> > +
> > +extern struct acpi_cpufreq_data *cpufreq_drv_data[NR_CPUS];
> > +
> > +struct cpufreq_cpuinfo {
> > +    unsigned int        max_freq;
> > +    unsigned int        second_max_freq;    /* P1 if Turbo Mode is on */
> > +    unsigned int        min_freq;
> > +    unsigned int        transition_latency; /* in 10^(-9) s = nanoseconds 
> > */
> > +};
> > +
> > +struct cpufreq_policy {
> > +    cpumask_var_t       cpus;          /* affected CPUs */
> > +    unsigned int        shared_type;   /* ANY or ALL affected CPUs
> > +                                          should set cpufreq */
> > +    unsigned int        cpu;           /* cpu nr of registered CPU */
> > +    struct cpufreq_cpuinfo    cpuinfo;
> > +
> > +    unsigned int        min;    /* in kHz */
> > +    unsigned int        max;    /* in kHz */
> > +    unsigned int        cur;    /* in kHz, only needed if cpufreq
> > +                                 * governors are used */
> > +    struct cpufreq_governor     *governor;
> > +
> > +    bool_t              resume; /* flag for cpufreq 1st run
> > +                                 * S3 wakeup, hotplug cpu, etc */
> > +    s8                  turbo;  /* tristate flag: 0 for unsupported
> > +                                 * -1 for disable, 1 for enabled
> > +                                 * See CPUFREQ_TURBO_* below for defines */
> > +    bool_t              aperf_mperf; /* CPU has APERF/MPERF MSRs */
> > +};
> > +DECLARE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_policy);
> > +
> > +extern int __cpufreq_set_policy(struct cpufreq_policy *data,
> > +                                struct cpufreq_policy *policy);
> > +
> > +void cpufreq_cmdline_parse(char *);
> > +
> > +#define CPUFREQ_SHARED_TYPE_NONE (0) /* None */
> > +#define CPUFREQ_SHARED_TYPE_HW   (1) /* HW does needed coordination */
> > +#define CPUFREQ_SHARED_TYPE_ALL  (2) /* All dependent CPUs should set freq 
> > */
> > +#define CPUFREQ_SHARED_TYPE_ANY  (3) /* Freq can be set from any dependent 
> > CPU*/
> > +
> > +/******************** cpufreq transition notifiers *******************/
> > +
> > +struct cpufreq_freqs {
> > +    unsigned int cpu;    /* cpu nr */
> > +    unsigned int old;
> > +    unsigned int new;
> > +    u8 flags;            /* flags of cpufreq_driver, see below. */
> > +};
> > +
> > +
> > +/*********************************************************************
> > + *                          CPUFREQ GOVERNORS                        *
> > + *********************************************************************/
> > +
> > +#define CPUFREQ_GOV_START  1
> > +#define CPUFREQ_GOV_STOP   2
> > +#define CPUFREQ_GOV_LIMITS 3
> > +
> > +struct cpufreq_governor {
> > +    char    name[CPUFREQ_NAME_LEN];
> > +    int     (*governor)(struct cpufreq_policy *policy,
> > +                        unsigned int event);
> > +    bool_t  (*handle_option)(const char *name, const char *value);
> > +    struct list_head governor_list;
> > +};
> > +
> > +extern struct cpufreq_governor *cpufreq_opt_governor;
> > +extern struct cpufreq_governor cpufreq_gov_dbs;
> > +extern struct cpufreq_governor cpufreq_gov_userspace;
> > +extern struct cpufreq_governor cpufreq_gov_performance;
> > +extern struct cpufreq_governor cpufreq_gov_powersave;
> > +
> > +extern struct list_head cpufreq_governor_list;
> > +
> > +extern int cpufreq_register_governor(struct cpufreq_governor *governor);
> > +extern struct cpufreq_governor *__find_governor(const char *governor);
> > +#define CPUFREQ_DEFAULT_GOVERNOR &cpufreq_gov_dbs
> > +
> > +/* pass a target to the cpufreq driver */
> > +extern int __cpufreq_driver_target(struct cpufreq_policy *policy,
> > +                                   unsigned int target_freq,
> > +                                   unsigned int relation);
> > +
> > +#define GOV_GETAVG     1
> > +#define USR_GETAVG     2
> > +extern int cpufreq_driver_getavg(unsigned int cpu, unsigned int flag);
> > +
> > +#define CPUFREQ_TURBO_DISABLED      -1
> > +#define CPUFREQ_TURBO_UNSUPPORTED   0
> > +#define CPUFREQ_TURBO_ENABLED       1
> > +
> > +extern int cpufreq_update_turbo(int cpuid, int new_state);
> > +extern int cpufreq_get_turbo_status(int cpuid);
> > +
> > +static __inline__ int
> > +__cpufreq_governor(struct cpufreq_policy *policy, unsigned int event)
> > +{
> > +    return policy->governor->governor(policy, event);
> > +}
> > +
> > +
> > +/*********************************************************************
> > + *                      CPUFREQ DRIVER INTERFACE                     *
> > + *********************************************************************/
> > +
> > +#define CPUFREQ_RELATION_L 0  /* lowest frequency at or above target */
> > +#define CPUFREQ_RELATION_H 1  /* highest frequency below or at target */
> > +
> > +struct cpufreq_driver {
> > +    char   name[CPUFREQ_NAME_LEN];
> > +    int    (*init)(struct cpufreq_policy *policy);
> > +    int    (*verify)(struct cpufreq_policy *policy);
> > +    int    (*update)(int cpuid, struct cpufreq_policy *policy);
> > +    int    (*target)(struct cpufreq_policy *policy,
> > +                     unsigned int target_freq,
> > +                     unsigned int relation);
> > +    unsigned int    (*get)(unsigned int cpu);
> > +    unsigned int    (*getavg)(unsigned int cpu, unsigned int flag);
> > +    int    (*exit)(struct cpufreq_policy *policy);
> > +};
> > +
> > +extern struct cpufreq_driver *cpufreq_driver;
> > +
> > +static __inline__
> > +int cpufreq_register_driver(struct cpufreq_driver *driver_data)
> > +{
> > +    if (!driver_data         ||
> > +        !driver_data->init   ||
> > +        !driver_data->exit   ||
> > +        !driver_data->verify ||
> > +        !driver_data->target)
> > +        return -EINVAL;
> > +
> > +    if (cpufreq_driver)
> > +        return -EBUSY;
> > +
> > +    cpufreq_driver = driver_data;
> > +    return 0;
> > +}
> > +
> > +static __inline__
> > +int cpufreq_unregister_driver(struct cpufreq_driver *driver)
> > +{
> > +    if (!cpufreq_driver || (driver != cpufreq_driver))
> > +        return -EINVAL;
> > +
> > +    cpufreq_driver = NULL;
> > +    return 0;
> > +}
> > +
> > +static __inline__
> > +void cpufreq_verify_within_limits(struct cpufreq_policy *policy,
> > +                                  unsigned int min, unsigned int max)
> > +{
> > +    if (policy->min < min)
> > +        policy->min = min;
> > +    if (policy->max < min)
> > +        policy->max = min;
> > +    if (policy->min > max)
> > +        policy->min = max;
> > +    if (policy->max > max)
> > +        policy->max = max;
> > +    if (policy->min > policy->max)
> > +        policy->min = policy->max;
> > +    return;
> > +}
> > +
> > +
> > +/*********************************************************************
> > + *                     FREQUENCY TABLE HELPERS                       *
> > + *********************************************************************/
> > +
> > +#define CPUFREQ_ENTRY_INVALID ~0
> > +#define CPUFREQ_TABLE_END     ~1
> > +
> > +struct cpufreq_frequency_table {
> > +    unsigned int    index;     /* any */
> > +    unsigned int    frequency; /* kHz - doesn't need to be in ascending
> > +                                * order */
> > +};
> > +
> > +int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
> > +                   struct cpufreq_frequency_table *table);
> > +
> > +int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
> > +                   struct cpufreq_frequency_table *table);
> > +
> > +int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
> > +                   struct cpufreq_frequency_table *table,
> > +                   unsigned int target_freq,
> > +                   unsigned int relation,
> > +                   unsigned int *index);
> > +
> > +
> > +/*********************************************************************
> > + *                     UNIFIED DEBUG HELPERS                         *
> > + *********************************************************************/
> > +
> > +struct cpu_dbs_info_s {
> > +    uint64_t prev_cpu_idle;
> > +    uint64_t prev_cpu_wall;
> > +    struct cpufreq_policy *cur_policy;
> > +    struct cpufreq_frequency_table *freq_table;
> > +    int cpu;
> > +    unsigned int enable:1;
> > +    unsigned int stoppable:1;
> > +    unsigned int turbo_enabled:1;
> > +};
> > +
> > +int cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int 
> > event);
> > +int get_cpufreq_ondemand_para(uint32_t *sampling_rate_max,
> > +                              uint32_t *sampling_rate_min,
> > +                              uint32_t *sampling_rate,
> > +                              uint32_t *up_threshold);
> > +int write_ondemand_sampling_rate(unsigned int sampling_rate);
> > +int write_ondemand_up_threshold(unsigned int up_threshold);
> > +
> > +int write_userspace_scaling_setspeed(unsigned int cpu, unsigned int freq);
> > +
> > +void cpufreq_dbs_timer_suspend(void);
> > +void cpufreq_dbs_timer_resume(void);
> > +
> > +#endif /* __XEN_CPUFREQ_PM_H__ */
>

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