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Re: [Xen-devel] [RFC PATCH 01/31] cpufreq: move cpufreq.h file to the xen/include/xen location



On Thu, 9 Nov 2017, Oleksandr Tyshchenko wrote:
> From: Oleksandr Dmytryshyn <oleksandr.dmytryshyn@xxxxxxxxxxxxxxx>
> 
> Cpufreq driver should be more generalizable (not ACPI-specific).
> Thus this file should be placed to more convenient location.
> 
> This is a rebased version of the original patch:
> https://lists.xen.org/archives/html/xen-devel/2014-11/msg00938.html
> 
> Signed-off-by: Oleksandr Dmytryshyn <oleksandr.dmytryshyn@xxxxxxxxxxxxxxx>
> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
> CC: Jan Beulich <jbeulich@xxxxxxxx>
> CC: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> CC: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> CC: Julien Grall <julien.grall@xxxxxxxxxx>

Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>


> ---
>  MAINTAINERS                                  |   1 +
>  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           | 245 --------------------------
>  xen/include/xen/cpufreq.h                    | 248 
> +++++++++++++++++++++++++++
>  13 files changed, 260 insertions(+), 256 deletions(-)
>  delete mode 100644 xen/include/acpi/cpufreq/cpufreq.h
>  create mode 100644 xen/include/xen/cpufreq.h
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 5b9e123..524e067 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -295,6 +295,7 @@ X:        xen/arch/x86/acpi/boot.c
>  X:   xen/arch/x86/acpi/lib.c
>  F:   xen/drivers/cpufreq/
>  F:   xen/include/acpi/cpufreq/
> +F:   xen/include/xen/cpufreq.h
>  
>  PUBLIC I/O INTERFACES AND PV DRIVERS DESIGNS
>  M:  Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> diff --git a/xen/arch/x86/acpi/cpu_idle.c b/xen/arch/x86/acpi/cpu_idle.c
> index 482b8a7..c66622e 100644
> --- a/xen/arch/x86/acpi/cpu_idle.c
> +++ b/xen/arch/x86/acpi/cpu_idle.c
> @@ -49,7 +49,7 @@
>  #include <xen/softirq.h>
>  #include <public/platform.h>
>  #include <public/sysctl.h>
> -#include <acpi/cpufreq/cpufreq.h>
> +#include <xen/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 1f8d02a..bd82025 100644
> --- a/xen/arch/x86/acpi/cpufreq/cpufreq.c
> +++ b/xen/arch/x86/acpi/cpufreq/cpufreq.c
> @@ -41,7 +41,7 @@
>  #include <asm/percpu.h>
>  #include <asm/cpufeature.h>
>  #include <acpi/acpi.h>
> -#include <acpi/cpufreq/cpufreq.h>
> +#include <xen/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 8f1ac74..79f55a3 100644
> --- a/xen/arch/x86/acpi/cpufreq/powernow.c
> +++ b/xen/arch/x86/acpi/cpufreq/powernow.c
> @@ -35,7 +35,7 @@
>  #include <asm/percpu.h>
>  #include <asm/cpufeature.h>
>  #include <acpi/acpi.h>
> -#include <acpi/cpufreq/cpufreq.h>
> +#include <xen/cpufreq.h>
>  
>  #define CPUID_FREQ_VOLT_CAPABILITIES    0x80000007
>  #define CPB_CAPABLE             0x00000200
> diff --git a/xen/arch/x86/acpi/power.c b/xen/arch/x86/acpi/power.c
> index 1e4e568..beebd5a 100644
> --- a/xen/arch/x86/acpi/power.c
> +++ b/xen/arch/x86/acpi/power.c
> @@ -28,7 +28,7 @@
>  #include <asm/tboot.h>
>  #include <asm/apic.h>
>  #include <asm/io_apic.h>
> -#include <acpi/cpufreq/cpufreq.h>
> +#include <xen/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 762dff1..29f0286 100644
> --- a/xen/arch/x86/cpu/mwait-idle.c
> +++ b/xen/arch/x86/cpu/mwait-idle.c
> @@ -58,7 +58,7 @@
>  #include <asm/hpet.h>
>  #include <asm/mwait.h>
>  #include <asm/msr.h>
> -#include <acpi/cpufreq/cpufreq.h>
> +#include <xen/cpufreq.h>
>  
>  #define MWAIT_IDLE_VERSION "0.4.1"
>  #undef PREFIX
> diff --git a/xen/drivers/acpi/pmstat.c b/xen/drivers/acpi/pmstat.c
> index 2a6c4c7..2dbde1c 100644
> --- a/xen/drivers/acpi/pmstat.c
> +++ b/xen/drivers/acpi/pmstat.c
> @@ -38,7 +38,7 @@
>  #include <xen/acpi.h>
>  
>  #include <public/sysctl.h>
> -#include <acpi/cpufreq/cpufreq.h>
> +#include <xen/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 212f48f..ab909e2 100644
> --- a/xen/drivers/cpufreq/cpufreq.c
> +++ b/xen/drivers/cpufreq/cpufreq.c
> @@ -43,7 +43,7 @@
>  #include <asm/processor.h>
>  #include <asm/percpu.h>
>  #include <acpi/acpi.h>
> -#include <acpi/cpufreq/cpufreq.h>
> +#include <xen/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..4a5510c 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 <xen/cpufreq.h>
>  
>  /*
>   * cpufreq userspace governor
> diff --git a/xen/drivers/cpufreq/cpufreq_ondemand.c 
> b/xen/drivers/cpufreq/cpufreq_ondemand.c
> index fe6c63d..1c384ec 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 <xen/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 53879fe..a687e5a 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 <xen/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 a5cd7d0..0000000
> --- a/xen/include/acpi/cpufreq/cpufreq.h
> +++ /dev/null
> @@ -1,245 +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 perf_limits {
> -    bool_t no_turbo;
> -    bool_t turbo_disabled;
> -    uint32_t turbo_pct;
> -    uint32_t max_perf_pct; /* max performance in percentage */
> -    uint32_t min_perf_pct; /* min performance in percentage */
> -    uint32_t max_perf;
> -    uint32_t min_perf;
> -    uint32_t max_policy_pct;
> -    uint32_t min_policy_pct;
> -};
> -
> -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 perf_limits  limits;
> -    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);
> -
> -#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    (*setpolicy)(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;
> -
> -int cpufreq_register_driver(struct cpufreq_driver *);
> -
> -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/xen/cpufreq.h b/xen/include/xen/cpufreq.h
> new file mode 100644
> index 0000000..ed38a6c
> --- /dev/null
> +++ b/xen/include/xen/cpufreq.h
> @@ -0,0 +1,248 @@
> +/*
> + *  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/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 perf_limits {
> +    bool_t no_turbo;
> +    bool_t turbo_disabled;
> +    uint32_t turbo_pct;
> +    uint32_t max_perf_pct; /* max performance in percentage */
> +    uint32_t min_perf_pct; /* min performance in percentage */
> +    uint32_t max_perf;
> +    uint32_t min_perf;
> +    uint32_t max_policy_pct;
> +    uint32_t min_policy_pct;
> +};
> +
> +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 perf_limits  limits;
> +    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);
> +
> +#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    (*setpolicy)(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;
> +
> +int cpufreq_register_driver(struct cpufreq_driver *);
> +
> +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__ */
> -- 
> 2.7.4
> 

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