# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1222434278 -3600
# Node ID 08374be213188c10eb7c170c143ca0d0d17e55d8
# Parent 5274aa966231ad5f050987e1fb00c6f6ee75a007
X86 and IA64: Rebase cpufreq logic for supporting both x86 and ia64
arch
Rebase cpufreq logic for supporting both x86 and ia64 arch:
1. move cpufreq arch-independent logic into common dir
(xen/drivers/acpi
and xen/drivers/cpufreq dir);
2. leave cpufreq x86-dependent logic at xen/arch/x86/acpi/cpufreq dir;
Signed-off-by: Yu, Ke <ke.yu@xxxxxxxxx>
Signed-off-by: Liu, Jinsong <jinsong.liu@xxxxxxxxx>
---
xen/arch/x86/acpi/cpufreq/cpufreq_ondemand.c | 246 ------------------
xen/arch/x86/acpi/cpufreq/utility.c | 368 ---------------------------
xen/arch/x86/acpi/pmstat.c | 155 -----------
xen/arch/x86/acpi/Makefile | 1
xen/arch/x86/acpi/cpufreq/Makefile | 2
xen/arch/x86/acpi/cpufreq/cpufreq.c | 153 -----------
xen/drivers/Makefile | 1
xen/drivers/acpi/Makefile | 1
xen/drivers/acpi/pmstat.c | 155 +++++++++++
xen/drivers/cpufreq/Makefile | 3
xen/drivers/cpufreq/cpufreq.c | 188 +++++++++++++
xen/drivers/cpufreq/cpufreq_ondemand.c | 246 ++++++++++++++++++
xen/drivers/cpufreq/utility.c | 368 +++++++++++++++++++++++++++
xen/include/acpi/cpufreq/cpufreq.h | 7
xen/include/acpi/cpufreq/processor_perf.h | 10
15 files changed, 976 insertions(+), 928 deletions(-)
diff -r 5274aa966231 -r 08374be21318 xen/arch/x86/acpi/Makefile
--- a/xen/arch/x86/acpi/Makefile Fri Sep 26 11:12:29 2008 +0100
+++ b/xen/arch/x86/acpi/Makefile Fri Sep 26 14:04:38 2008 +0100
@@ -2,4 +2,3 @@ subdir-y += cpufreq
obj-y += boot.o
obj-y += power.o suspend.o wakeup_prot.o cpu_idle.o cpuidle_menu.o
-obj-y += pmstat.o
diff -r 5274aa966231 -r 08374be21318 xen/arch/x86/acpi/cpufreq/Makefile
--- a/xen/arch/x86/acpi/cpufreq/Makefile Fri Sep 26 11:12:29 2008 +0100
+++ b/xen/arch/x86/acpi/cpufreq/Makefile Fri Sep 26 14:04:38 2008 +0100
@@ -1,4 +1,2 @@ obj-y += cpufreq.o
obj-y += cpufreq.o
-obj-y += utility.o
-obj-y += cpufreq_ondemand.o
obj-y += powernow.o
diff -r 5274aa966231 -r 08374be21318 xen/arch/x86/acpi/cpufreq/cpufreq.c
--- a/xen/arch/x86/acpi/cpufreq/cpufreq.c Fri Sep 26 11:12:29 2008 +0100
+++ b/xen/arch/x86/acpi/cpufreq/cpufreq.c Fri Sep 26 14:04:38 2008 +0100
@@ -45,9 +45,6 @@
#include <acpi/acpi.h>
#include <acpi/cpufreq/cpufreq.h>
-/* TODO: change to link list later as domain number may be sparse */
-static cpumask_t cpufreq_dom_map[NR_CPUS];
-
enum {
UNDEFINED_CAPABLE = 0,
SYSTEM_INTEL_MSR_CAPABLE,
@@ -56,13 +53,6 @@ enum {
#define INTEL_MSR_RANGE (0xffff)
#define CPUID_6_ECX_APERFMPERF_CAPABILITY (0x1)
-
-struct acpi_cpufreq_data {
- struct processor_performance *acpi_data;
- struct cpufreq_frequency_table *freq_table;
- unsigned int max_freq;
- unsigned int cpu_feature;
-};
static struct acpi_cpufreq_data *drv_data[NR_CPUS];
@@ -342,7 +332,7 @@ static int acpi_cpufreq_target(struct cp
policy->resume = 0;
}
else {
- printk(KERN_INFO "Already at target state (P%d)\n",
+ printk(KERN_DEBUG "Already at target state (P%d)\n",
next_perf_state);
return 0;
}
@@ -379,7 +369,7 @@ static int acpi_cpufreq_target(struct cp
if (!check_freqs(cmd.mask, freqs.new, data))
return -EAGAIN;
- px_statistic_update(cmd.mask, perf->state, next_perf_state);
+ cpufreq_statistic_update(cmd.mask, perf->state, next_perf_state);
perf->state = next_perf_state;
policy->cur = freqs.new;
@@ -581,145 +571,6 @@ static struct cpufreq_driver acpi_cpufre
.exit = acpi_cpufreq_cpu_exit,
};
-int cpufreq_limit_change(unsigned int cpu)
-{
- struct processor_performance *perf = &processor_pminfo[cpu]->perf;
- struct cpufreq_policy *data = cpufreq_cpu_policy[cpu];
- struct cpufreq_policy policy;
-
- if (!cpu_online(cpu) || !data || !processor_pminfo[cpu])
- return -ENODEV;
-
- if ((perf->platform_limit < 0) ||
- (perf->platform_limit >= perf->state_count))
- return -EINVAL;
-
- memcpy(&policy, data, sizeof(struct cpufreq_policy));
-
- policy.max =
- perf->states[perf->platform_limit].core_frequency * 1000;
-
- return __cpufreq_set_policy(data, &policy);
-}
-
-int cpufreq_add_cpu(unsigned int cpu)
-{
- int ret = 0;
- unsigned int firstcpu;
- unsigned int dom;
- unsigned int j;
- struct cpufreq_policy new_policy;
- struct cpufreq_policy *policy;
- struct processor_performance *perf = &processor_pminfo[cpu]->perf;
-
- /* to protect the case when Px was not controlled by xen */
- if (!processor_pminfo[cpu] || !(perf->init & XEN_PX_INIT))
- return 0;
-
- if (cpu_is_offline(cpu) || cpufreq_cpu_policy[cpu])
- return -EINVAL;
-
- ret = px_statistic_init(cpu);
- if (ret)
- return ret;
-
- dom = perf->domain_info.domain;
- if (cpus_weight(cpufreq_dom_map[dom])) {
- /* share policy with the first cpu since on same boat */
- firstcpu = first_cpu(cpufreq_dom_map[dom]);
- policy = cpufreq_cpu_policy[firstcpu];
-
- cpufreq_cpu_policy[cpu] = policy;
- cpu_set(cpu, cpufreq_dom_map[dom]);
- cpu_set(cpu, policy->cpus);
-
- printk(KERN_EMERG"adding CPU %u\n", cpu);
- } else {
- /* for the first cpu, setup policy and do init work */
- policy = xmalloc(struct cpufreq_policy);
- if (!policy) {
- px_statistic_exit(cpu);
- return -ENOMEM;
- }
- memset(policy, 0, sizeof(struct cpufreq_policy));
-
- cpufreq_cpu_policy[cpu] = policy;
- cpu_set(cpu, cpufreq_dom_map[dom]);
- cpu_set(cpu, policy->cpus);
-
- policy->cpu = cpu;
- ret = cpufreq_driver->init(policy);
- if (ret)
- goto err1;
- printk(KERN_EMERG"CPU %u initialization completed\n", cpu);
- }
-
- /*
- * After get full cpumap of the coordination domain,
- * we can safely start gov here.
- */
- if (cpus_weight(cpufreq_dom_map[dom]) ==
- perf->domain_info.num_processors) {
- memcpy(&new_policy, policy, sizeof(struct cpufreq_policy));
- policy->governor = NULL;
- ret = __cpufreq_set_policy(policy, &new_policy);
- if (ret)
- goto err2;
- }
-
- return 0;
-
-err2:
- cpufreq_driver->exit(policy);
-err1:
- for_each_cpu_mask(j, cpufreq_dom_map[dom]) {
- cpufreq_cpu_policy[j] = NULL;
- px_statistic_exit(j);
- }
-
- cpus_clear(cpufreq_dom_map[dom]);
- xfree(policy);
- return ret;
-}
-
-int cpufreq_del_cpu(unsigned int cpu)
-{
- unsigned int dom;
- struct cpufreq_policy *policy;
- struct processor_performance *perf = &processor_pminfo[cpu]->perf;
-
- /* to protect the case when Px was not controlled by xen */
- if (!processor_pminfo[cpu] || !(perf->init & XEN_PX_INIT))
- return 0;
-
- if (cpu_is_offline(cpu) || !cpufreq_cpu_policy[cpu])
- return -EINVAL;
-
- dom = perf->domain_info.domain;
- policy = cpufreq_cpu_policy[cpu];
-
- printk(KERN_EMERG"deleting CPU %u\n", cpu);
-
- /* for the first cpu of the domain, stop gov */
- if (cpus_weight(cpufreq_dom_map[dom]) ==
- perf->domain_info.num_processors)
- __cpufreq_governor(policy, CPUFREQ_GOV_STOP);
-
- cpufreq_cpu_policy[cpu] = NULL;
- cpu_clear(cpu, policy->cpus);
- cpu_clear(cpu, cpufreq_dom_map[dom]);
- px_statistic_exit(cpu);
-
- /* for the last cpu of the domain, clean room */
- /* It's safe here to free freq_table, drv_data and policy */
- if (!cpus_weight(cpufreq_dom_map[dom])) {
- cpufreq_driver->exit(policy);
- xfree(policy);
- }
-
- return 0;
-}
-
static int __init cpufreq_driver_init(void)
{
int ret = 0;
diff -r 5274aa966231 -r 08374be21318
xen/arch/x86/acpi/cpufreq/cpufreq_ondemand.c
--- a/xen/arch/x86/acpi/cpufreq/cpufreq_ondemand.c Fri Sep 26 11:12:29
2008 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,246 +0,0 @@
-/*
- * xen/arch/x86/acpi/cpufreq/cpufreq_ondemand.c
- *
- * Copyright (C) 2001 Russell King
- * (C) 2003 Venkatesh Pallipadi <venkatesh.pallipadi@xxxxxxxxx>.
- * Jun Nakajima <jun.nakajima@xxxxxxxxx>
- * Feb 2008 Liu Jinsong <jinsong.liu@xxxxxxxxx>
- * Porting cpufreq_ondemand.c from Liunx 2.6.23 to Xen hypervisor
- *
- * 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.
- */
-
-#include <xen/types.h>
-#include <xen/percpu.h>
-#include <xen/cpumask.h>
-#include <xen/types.h>
-#include <xen/sched.h>
-#include <xen/timer.h>
-#include <asm/config.h>
-#include <acpi/cpufreq/cpufreq.h>
-
-#define DEF_FREQUENCY_UP_THRESHOLD (80)
-
-#define MIN_DBS_INTERVAL (MICROSECS(100))
-#define MIN_SAMPLING_MILLISECS (20)
-#define MIN_STAT_SAMPLING_RATE \
- (MIN_SAMPLING_MILLISECS * MILLISECS(1))
-#define DEF_SAMPLING_RATE_LATENCY_MULTIPLIER (1000)
-#define TRANSITION_LATENCY_LIMIT (10 * 1000 )
-
-static uint64_t def_sampling_rate;
-
-/* Sampling types */
-enum {DBS_NORMAL_SAMPLE, DBS_SUB_SAMPLE};
-
-static DEFINE_PER_CPU(struct cpu_dbs_info_s, cpu_dbs_info);
-
-static unsigned int dbs_enable; /* number of CPUs using this policy */
-
-static struct dbs_tuners {
- uint64_t sampling_rate;
- unsigned int up_threshold;
- unsigned int ignore_nice;
- unsigned int powersave_bias;
-} dbs_tuners_ins = {
- .up_threshold = DEF_FREQUENCY_UP_THRESHOLD,
- .ignore_nice = 0,
- .powersave_bias = 0,
-};
-
-static struct timer dbs_timer[NR_CPUS];
-
-uint64_t get_cpu_idle_time(unsigned int cpu)
-{
- uint64_t idle_ns;
- struct vcpu *v;
-
- if ((v = idle_vcpu[cpu]) == NULL)
- return 0;
-
- idle_ns = v->runstate.time[RUNSTATE_running];
- if (v->is_running)
- idle_ns += NOW() - v->runstate.state_entry_time;
-
- return idle_ns;
-}
-
-static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info)
-{
- unsigned int load = 0;
- uint64_t cur_ns, idle_ns, total_ns;
-
- struct cpufreq_policy *policy;
- unsigned int j;
-
- if (!this_dbs_info->enable)
- return;
-
- policy = this_dbs_info->cur_policy;
-
- if (unlikely(policy->resume)) {
- __cpufreq_driver_target(policy, policy->max,CPUFREQ_RELATION_H);
- return;
- }
-
- cur_ns = NOW();
- total_ns = cur_ns - this_dbs_info->prev_cpu_wall;
- this_dbs_info->prev_cpu_wall = NOW();
-
- if (total_ns < MIN_DBS_INTERVAL)
- return;
-
- /* Get Idle Time */
- idle_ns = UINT_MAX;
- for_each_cpu_mask(j, policy->cpus) {
- uint64_t total_idle_ns;
- unsigned int tmp_idle_ns;
- struct cpu_dbs_info_s *j_dbs_info;
-
- j_dbs_info = &per_cpu(cpu_dbs_info, j);
- total_idle_ns = get_cpu_idle_time(j);
- tmp_idle_ns = total_idle_ns - j_dbs_info->prev_cpu_idle;
- j_dbs_info->prev_cpu_idle = total_idle_ns;
-
- if (tmp_idle_ns < idle_ns)
- idle_ns = tmp_idle_ns;
- }
-
- if (likely(total_ns > idle_ns))
- load = (100 * (total_ns - idle_ns)) / total_ns;
-
- /* Check for frequency increase */
- if (load > dbs_tuners_ins.up_threshold) {
- /* if we are already at full speed then break out early */
- if (policy->cur == policy->max)
- return;
- __cpufreq_driver_target(policy, policy->max,CPUFREQ_RELATION_H);
- return;
- }
-
- /* Check for frequency decrease */
- /* if we cannot reduce the frequency anymore, break out early */
- if (policy->cur == policy->min)
- return;
-
- /*
- * The optimal frequency is the frequency that is the lowest that
- * can support the current CPU usage without triggering the up
- * policy. To be safe, we focus 10 points under the threshold.
- */
- if (load < (dbs_tuners_ins.up_threshold - 10)) {
- unsigned int freq_next, freq_cur;
-
- freq_cur = __cpufreq_driver_getavg(policy);
- if (!freq_cur)
- freq_cur = policy->cur;
-
- freq_next = (freq_cur * load) / (dbs_tuners_ins.up_threshold - 10);
-
- __cpufreq_driver_target(policy, freq_next, CPUFREQ_RELATION_L);
- }
-}
-
-static void do_dbs_timer(void *dbs)
-{
- struct cpu_dbs_info_s *dbs_info = (struct cpu_dbs_info_s *)dbs;
-
- if (!dbs_info->enable)
- return;
-
- dbs_check_cpu(dbs_info);
-
- set_timer(&dbs_timer[dbs_info->cpu], NOW()+dbs_tuners_ins.sampling_rate);
-}
-
-static void dbs_timer_init(struct cpu_dbs_info_s *dbs_info)
-{
- dbs_info->enable = 1;
-
- init_timer(&dbs_timer[dbs_info->cpu], do_dbs_timer,
- (void *)dbs_info, dbs_info->cpu);
-
- set_timer(&dbs_timer[dbs_info->cpu], NOW()+dbs_tuners_ins.sampling_rate);
-}
-
-static void dbs_timer_exit(struct cpu_dbs_info_s *dbs_info)
-{
- dbs_info->enable = 0;
- stop_timer(&dbs_timer[dbs_info->cpu]);
-}
-
-int cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int event)
-{
- unsigned int cpu = policy->cpu;
- struct cpu_dbs_info_s *this_dbs_info;
- unsigned int j;
-
- this_dbs_info = &per_cpu(cpu_dbs_info, cpu);
-
- switch (event) {
- case CPUFREQ_GOV_START:
- if ((!cpu_online(cpu)) || (!policy->cur))
- return -EINVAL;
-
- if (policy->cpuinfo.transition_latency >
- (TRANSITION_LATENCY_LIMIT * 1000)) {
- printk(KERN_WARNING "ondemand governor failed to load "
- "due to too long transition latency\n");
- return -EINVAL;
- }
- if (this_dbs_info->enable)
- /* Already enabled */
- break;
-
- dbs_enable++;
-
- for_each_cpu_mask(j, policy->cpus) {
- struct cpu_dbs_info_s *j_dbs_info;
- j_dbs_info = &per_cpu(cpu_dbs_info, j);
- j_dbs_info->cur_policy = policy;
-
- j_dbs_info->prev_cpu_idle = get_cpu_idle_time(j);
- j_dbs_info->prev_cpu_wall = NOW();
- }
- this_dbs_info->cpu = cpu;
- /*
- * Start the timerschedule work, when this governor
- * is used for first time
- */
- if (dbs_enable == 1) {
- def_sampling_rate = policy->cpuinfo.transition_latency *
- DEF_SAMPLING_RATE_LATENCY_MULTIPLIER;
-
- if (def_sampling_rate < MIN_STAT_SAMPLING_RATE)
- def_sampling_rate = MIN_STAT_SAMPLING_RATE;
-
- dbs_tuners_ins.sampling_rate = def_sampling_rate;
- }
- dbs_timer_init(this_dbs_info);
-
- break;
-
- case CPUFREQ_GOV_STOP:
- dbs_timer_exit(this_dbs_info);
- dbs_enable--;
-
- break;
-
- case CPUFREQ_GOV_LIMITS:
- if (policy->max < this_dbs_info->cur_policy->cur)
- __cpufreq_driver_target(this_dbs_info->cur_policy,
- policy->max, CPUFREQ_RELATION_H);
- else if (policy->min > this_dbs_info->cur_policy->cur)
- __cpufreq_driver_target(this_dbs_info->cur_policy,
- policy->min, CPUFREQ_RELATION_L);
- break;
- }
- return 0;
-}
-
-struct cpufreq_governor cpufreq_gov_dbs = {
- .name = "ondemand",
- .governor = cpufreq_governor_dbs,
-};
diff -r 5274aa966231 -r 08374be21318 xen/arch/x86/acpi/cpufreq/utility.c
--- a/xen/arch/x86/acpi/cpufreq/utility.c Fri Sep 26 11:12:29 2008 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,368 +0,0 @@
-/*
- * utility.c - misc functions for cpufreq driver and Px statistic
- *
- * Copyright (C) 2001 Russell King
- * (C) 2002 - 2003 Dominik Brodowski <linux@xxxxxxxx>
- *
- * Oct 2005 - Ashok Raj <ashok.raj@xxxxxxxxx>
- * Added handling for CPU hotplug
- * Feb 2006 - Jacob Shin <jacob.shin@xxxxxxx>
- * Fix handling for CPU hotplug -- affected CPUs
- * Feb 2008 - Liu Jinsong <jinsong.liu@xxxxxxxxx>
- * 1. Merge cpufreq.c and freq_table.c of linux 2.6.23
- * And poring to Xen hypervisor
- * 2. some Px statistic interface funcdtions
- *
- * 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.
- *
- */
-
-#include <xen/errno.h>
-#include <xen/cpumask.h>
-#include <xen/types.h>
-#include <xen/spinlock.h>
-#include <xen/percpu.h>
-#include <xen/types.h>
-#include <xen/sched.h>
-#include <xen/timer.h>
-#include <asm/config.h>
-#include <acpi/cpufreq/cpufreq.h>
-#include <public/sysctl.h>
-
-struct cpufreq_driver *cpufreq_driver;
-struct processor_pminfo *__read_mostly processor_pminfo[NR_CPUS];
-struct cpufreq_policy *__read_mostly cpufreq_cpu_policy[NR_CPUS];
-
-/*********************************************************************
- * Px STATISTIC INFO *
- *********************************************************************/
-
-void px_statistic_update(cpumask_t cpumask, uint8_t from, uint8_t to)
-{
- uint32_t i;
- uint64_t now;
-
- now = NOW();
-
- for_each_cpu_mask(i, cpumask) {
- struct pm_px *pxpt = px_statistic_data[i];
- struct processor_pminfo *pmpt = processor_pminfo[i];
- uint64_t total_idle_ns;
- uint64_t tmp_idle_ns;
-
- if ( !pxpt || !pmpt )
- continue;
-
- total_idle_ns = get_cpu_idle_time(i);
- tmp_idle_ns = total_idle_ns - pxpt->prev_idle_wall;
-
- pxpt->u.last = from;
- pxpt->u.cur = to;
- pxpt->u.pt[to].count++;
- pxpt->u.pt[from].residency += now - pxpt->prev_state_wall;
- pxpt->u.pt[from].residency -= tmp_idle_ns;
-
- (*(pxpt->u.trans_pt + from * pmpt->perf.state_count + to))++;
-
- pxpt->prev_state_wall = now;
- pxpt->prev_idle_wall = total_idle_ns;
- }
-}
-
-int px_statistic_init(unsigned int cpuid)
-{
- uint32_t i, count;
- struct pm_px *pxpt = px_statistic_data[cpuid];
- const struct processor_pminfo *pmpt = processor_pminfo[cpuid];
-
- count = pmpt->perf.state_count;
-
- if ( !pmpt )
- return -EINVAL;
-
- if ( !pxpt )
- {
- pxpt = xmalloc(struct pm_px);
- if ( !pxpt )
- return -ENOMEM;
- memset(pxpt, 0, sizeof(*pxpt));
- px_statistic_data[cpuid] = pxpt;
- }
-
- pxpt->u.trans_pt = xmalloc_array(uint64_t, count * count);
- if (!pxpt->u.trans_pt)
- return -ENOMEM;
-
- pxpt->u.pt = xmalloc_array(struct pm_px_val, count);
- if (!pxpt->u.pt) {
- xfree(pxpt->u.trans_pt);
- return -ENOMEM;
- }
-
- memset(pxpt->u.trans_pt, 0, count * count * (sizeof(uint64_t)));
- memset(pxpt->u.pt, 0, count * (sizeof(struct pm_px_val)));
-
- pxpt->u.total = pmpt->perf.state_count;
- pxpt->u.usable = pmpt->perf.state_count - pmpt->perf.platform_limit;
-
- for (i=0; i < pmpt->perf.state_count; i++)
- pxpt->u.pt[i].freq = pmpt->perf.states[i].core_frequency;
-
- pxpt->prev_state_wall = NOW();
- pxpt->prev_idle_wall = get_cpu_idle_time(cpuid);
-
- return 0;
-}
-
-void px_statistic_exit(unsigned int cpuid)
-{
- struct pm_px *pxpt = px_statistic_data[cpuid];
-
- if (!pxpt)
- return;
- xfree(pxpt->u.trans_pt);
- xfree(pxpt->u.pt);
- memset(pxpt, 0, sizeof(struct pm_px));
-}
-
-void px_statistic_reset(unsigned int cpuid)
-{
- uint32_t i, j, count;
- struct pm_px *pxpt = px_statistic_data[cpuid];
- const struct processor_pminfo *pmpt = processor_pminfo[cpuid];
-
- if ( !pxpt || !pmpt )
- return;
-
- count = pmpt->perf.state_count;
-
- for (i=0; i < count; i++) {
- pxpt->u.pt[i].residency = 0;
- pxpt->u.pt[i].count = 0;
-
- for (j=0; j < count; j++)
- *(pxpt->u.trans_pt + i*count + j) = 0;
- }
-
- pxpt->prev_state_wall = NOW();
- pxpt->prev_idle_wall = get_cpu_idle_time(cpuid);
-}
-
-
-/*********************************************************************
- * FREQUENCY TABLE HELPERS *
- *********************************************************************/
-
-int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
- struct cpufreq_frequency_table *table)
-{
- unsigned int min_freq = ~0;
- unsigned int max_freq = 0;
- unsigned int i;
-
- for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
- unsigned int freq = table[i].frequency;
- if (freq == CPUFREQ_ENTRY_INVALID)
- continue;
- if (freq < min_freq)
- min_freq = freq;
- if (freq > max_freq)
- max_freq = freq;
- }
-
- policy->min = policy->cpuinfo.min_freq = min_freq;
- policy->max = policy->cpuinfo.max_freq = max_freq;
-
- if (policy->min == ~0)
- return -EINVAL;
- else
- return 0;
-}
-
-int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
- struct cpufreq_frequency_table *table)
-{
- unsigned int next_larger = ~0;
- unsigned int i;
- unsigned int count = 0;
-
- if (!cpu_online(policy->cpu))
- return -EINVAL;
-
- cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
- policy->cpuinfo.max_freq);
-
- for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
- unsigned int freq = table[i].frequency;
- if (freq == CPUFREQ_ENTRY_INVALID)
- continue;
- if ((freq >= policy->min) && (freq <= policy->max))
- count++;
- else if ((next_larger > freq) && (freq > policy->max))
- next_larger = freq;
- }
-
- if (!count)
- policy->max = next_larger;
-
- cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
- policy->cpuinfo.max_freq);
-
- return 0;
-}
-
-int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
- struct cpufreq_frequency_table *table,
- unsigned int target_freq,
- unsigned int relation,
- unsigned int *index)
-{
- struct cpufreq_frequency_table optimal = {
- .index = ~0,
- .frequency = 0,
- };
- struct cpufreq_frequency_table suboptimal = {
- .index = ~0,
- .frequency = 0,
- };
- unsigned int i;
-
- switch (relation) {
- case CPUFREQ_RELATION_H:
- suboptimal.frequency = ~0;
- break;
- case CPUFREQ_RELATION_L:
- optimal.frequency = ~0;
- break;
- }
-
- if (!cpu_online(policy->cpu))
- return -EINVAL;
-
- for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
- unsigned int freq = table[i].frequency;
- if (freq == CPUFREQ_ENTRY_INVALID)
- continue;
- if ((freq < policy->min) || (freq > policy->max))
- continue;
- switch(relation) {
- case CPUFREQ_RELATION_H:
- if (freq <= target_freq) {
- if (freq >= optimal.frequency) {
- optimal.frequency = freq;
- optimal.index = i;
- }
- } else {
- if (freq <= suboptimal.frequency) {
- suboptimal.frequency = freq;
- suboptimal.index = i;
- }
- }
- break;
- case CPUFREQ_RELATION_L:
- if (freq >= target_freq) {
- if (freq <= optimal.frequency) {
- optimal.frequency = freq;
- optimal.index = i;
- }
- } else {
- if (freq >= suboptimal.frequency) {
- suboptimal.frequency = freq;
- suboptimal.index = i;
- }
- }
- break;
- }
- }
- if (optimal.index > i) {
- if (suboptimal.index > i)
- return -EINVAL;
- *index = suboptimal.index;
- } else
- *index = optimal.index;
-
- return 0;
-}
-
-
-/*********************************************************************
- * GOVERNORS *
- *********************************************************************/
-
-int __cpufreq_driver_target(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
-{
- int retval = -EINVAL;
-
- if (cpu_online(policy->cpu) && cpufreq_driver->target)
- retval = cpufreq_driver->target(policy, target_freq, relation);
-
- return retval;
-}
-
-int __cpufreq_driver_getavg(struct cpufreq_policy *policy)
-{
- int ret = 0;
-
- if (!policy)
- return -EINVAL;
-
- if (cpu_online(policy->cpu) && cpufreq_driver->getavg)
- ret = cpufreq_driver->getavg(policy->cpu);
-
- return ret;
-}
-
-
-/*********************************************************************
- * POLICY *
- *********************************************************************/
-
-/*
- * data : current policy.
- * policy : policy to be set.
- */
-int __cpufreq_set_policy(struct cpufreq_policy *data,
- struct cpufreq_policy *policy)
-{
- int ret = 0;
-
- memcpy(&policy->cpuinfo, &data->cpuinfo, sizeof(struct cpufreq_cpuinfo));
-
- if (policy->min > data->min && policy->min > policy->max)
- return -EINVAL;
-
- /* verify the cpu speed can be set within this limit */
- ret = cpufreq_driver->verify(policy);
- if (ret)
- return ret;
-
- data->min = policy->min;
- data->max = policy->max;
-
- if (policy->governor != data->governor) {
- /* save old, working values */
- struct cpufreq_governor *old_gov = data->governor;
-
- /* end old governor */
- if (data->governor)
- __cpufreq_governor(data, CPUFREQ_GOV_STOP);
-
- /* start new governor */
- data->governor = policy->governor;
- if (__cpufreq_governor(data, CPUFREQ_GOV_START)) {
- /* new governor failed, so re-start old one */
- if (old_gov) {
- data->governor = old_gov;
- __cpufreq_governor(data, CPUFREQ_GOV_START);
- }
- return -EINVAL;
- }
- /* might be a policy change, too, so fall through */
- }
-
- return __cpufreq_governor(data, CPUFREQ_GOV_LIMITS);
-}
diff -r 5274aa966231 -r 08374be21318 xen/arch/x86/acpi/pmstat.c
--- a/xen/arch/x86/acpi/pmstat.c Fri Sep 26 11:12:29 2008 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,155 +0,0 @@
-/*****************************************************************************
-# pmstat.c - Power Management statistic information (Px/Cx/Tx, etc.)
-#
-# Copyright (c) 2008, Liu Jinsong <jinsong.liu@xxxxxxxxx>
-#
-# This program is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by the Free
-# Software Foundation; either version 2 of the License, or (at your option)
-# any later version.
-#
-# This program is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-# more details.
-#
-# You should have received a copy of the GNU General Public License along with
-# this program; if not, write to the Free Software Foundation, Inc., 59
-# Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# The full GNU General Public License is included in this distribution in the
-# file called LICENSE.
-#
-*****************************************************************************/
-
-#include <xen/config.h>
-#include <xen/lib.h>
-#include <xen/errno.h>
-#include <xen/sched.h>
-#include <xen/event.h>
-#include <xen/irq.h>
-#include <xen/iocap.h>
-#include <xen/compat.h>
-#include <xen/guest_access.h>
-#include <asm/current.h>
-#include <public/xen.h>
-#include <xen/cpumask.h>
-#include <asm/processor.h>
-#include <xen/percpu.h>
-#include <xen/domain.h>
-
-#include <public/sysctl.h>
-#include <acpi/cpufreq/cpufreq.h>
-
-struct pm_px *__read_mostly px_statistic_data[NR_CPUS];
-
-extern uint32_t pmstat_get_cx_nr(uint32_t cpuid);
-extern int pmstat_get_cx_stat(uint32_t cpuid, struct pm_cx_stat *stat);
-extern int pmstat_reset_cx_stat(uint32_t cpuid);
-
-int do_get_pm_info(struct xen_sysctl_get_pmstat *op)
-{
- int ret = 0;
- const struct processor_pminfo *pmpt = processor_pminfo[op->cpuid];
-
- if ( (op->cpuid >= NR_CPUS) || !cpu_online(op->cpuid) )
- return -EINVAL;
-
- switch ( op->type & PMSTAT_CATEGORY_MASK )
- {
- case PMSTAT_CX:
- if ( !(xen_processor_pmbits & XEN_PROCESSOR_PM_CX) )
- return -ENODEV;
- break;
- case PMSTAT_PX:
- if ( !(xen_processor_pmbits & XEN_PROCESSOR_PM_PX) )
- return -ENODEV;
- if ( !pmpt || !(pmpt->perf.init & XEN_PX_INIT) )
- return -EINVAL;
- break;
- default:
- return -ENODEV;
- }
-
- switch ( op->type )
- {
- case PMSTAT_get_max_px:
- {
- op->u.getpx.total = pmpt->perf.state_count;
- break;
- }
-
- case PMSTAT_get_pxstat:
- {
- uint64_t now, ct;
- uint64_t total_idle_ns;
- uint64_t tmp_idle_ns;
- struct pm_px *pxpt = px_statistic_data[op->cpuid];
-
- if ( !pxpt )
- return -ENODATA;
-
- total_idle_ns = get_cpu_idle_time(op->cpuid);
- tmp_idle_ns = total_idle_ns - pxpt->prev_idle_wall;
-
- now = NOW();
- pxpt->u.usable = pmpt->perf.state_count - pmpt->perf.platform_limit;
- pxpt->u.pt[pxpt->u.cur].residency += now - pxpt->prev_state_wall;
- pxpt->u.pt[pxpt->u.cur].residency -= tmp_idle_ns;
- pxpt->prev_state_wall = now;
- pxpt->prev_idle_wall = total_idle_ns;
-
- ct = pmpt->perf.state_count;
- if ( copy_to_guest(op->u.getpx.trans_pt, pxpt->u.trans_pt, ct*ct) )
- {
- ret = -EFAULT;
- break;
- }
-
- if ( copy_to_guest(op->u.getpx.pt, pxpt->u.pt, ct) )
- {
- ret = -EFAULT;
- break;
- }
-
- op->u.getpx.total = pxpt->u.total;
- op->u.getpx.usable = pxpt->u.usable;
- op->u.getpx.last = pxpt->u.last;
- op->u.getpx.cur = pxpt->u.cur;
-
- break;
- }
-
- case PMSTAT_reset_pxstat:
- {
- px_statistic_reset(op->cpuid);
- break;
- }
-
- case PMSTAT_get_max_cx:
- {
- op->u.getcx.nr = pmstat_get_cx_nr(op->cpuid);
- ret = 0;
- break;
- }
-
- case PMSTAT_get_cxstat:
- {
- ret = pmstat_get_cx_stat(op->cpuid, &op->u.getcx);
- break;
- }
-
- case PMSTAT_reset_cxstat:
- {
- ret = pmstat_reset_cx_stat(op->cpuid);
- break;
- }
-
- default:
- printk("not defined sub-hypercall @ do_get_pm_info\n");
- ret = -ENOSYS;
- break;
- }
-
- return ret;
-}
diff -r 5274aa966231 -r 08374be21318 xen/drivers/Makefile
--- a/xen/drivers/Makefile Fri Sep 26 11:12:29 2008 +0100
+++ b/xen/drivers/Makefile Fri Sep 26 14:04:38 2008 +0100
@@ -1,4 +1,5 @@ subdir-y += char
subdir-y += char
+subdir-y += cpufreq
subdir-$(x86) += passthrough
subdir-$(HAS_ACPI) += acpi
subdir-$(HAS_VGA) += video
diff -r 5274aa966231 -r 08374be21318 xen/drivers/acpi/Makefile
--- a/xen/drivers/acpi/Makefile Fri Sep 26 11:12:29 2008 +0100
+++ b/xen/drivers/acpi/Makefile Fri Sep 26 14:04:38 2008 +0100
@@ -4,6 +4,7 @@ obj-y += tables.o
obj-y += tables.o
obj-y += numa.o
obj-y += osl.o
+obj-y += pmstat.o
obj-$(x86) += hwregs.o
obj-$(x86) += reboot.o
diff -r 5274aa966231 -r 08374be21318 xen/drivers/acpi/pmstat.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/drivers/acpi/pmstat.c Fri Sep 26 14:04:38 2008 +0100
@@ -0,0 +1,155 @@
+/*****************************************************************************
+# pmstat.c - Power Management statistic information (Px/Cx/Tx, etc.)
+#
+# Copyright (c) 2008, Liu Jinsong <jinsong.liu@xxxxxxxxx>
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Software Foundation, Inc., 59
+# Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# The full GNU General Public License is included in this distribution in the
+# file called LICENSE.
+#
+*****************************************************************************/
+
+#include <xen/config.h>
+#include <xen/lib.h>
+#include <xen/errno.h>
+#include <xen/sched.h>
+#include <xen/event.h>
+#include <xen/irq.h>
+#include <xen/iocap.h>
+#include <xen/compat.h>
+#include <xen/guest_access.h>
+#include <asm/current.h>
+#include <public/xen.h>
+#include <xen/cpumask.h>
+#include <asm/processor.h>
+#include <xen/percpu.h>
+#include <xen/domain.h>
+
+#include <public/sysctl.h>
+#include <acpi/cpufreq/cpufreq.h>
+
+struct pm_px *__read_mostly cpufreq_statistic_data[NR_CPUS];
+
+extern uint32_t pmstat_get_cx_nr(uint32_t cpuid);
+extern int pmstat_get_cx_stat(uint32_t cpuid, struct pm_cx_stat *stat);
+extern int pmstat_reset_cx_stat(uint32_t cpuid);
+
+int do_get_pm_info(struct xen_sysctl_get_pmstat *op)
+{
+ int ret = 0;
+ const struct processor_pminfo *pmpt = processor_pminfo[op->cpuid];
+
+ if ( (op->cpuid >= NR_CPUS) || !cpu_online(op->cpuid) )
+ return -EINVAL;
+
+ switch ( op->type & PMSTAT_CATEGORY_MASK )
+ {
+ case PMSTAT_CX:
+ if ( !(xen_processor_pmbits & XEN_PROCESSOR_PM_CX) )
+ return -ENODEV;
+ break;
+ case PMSTAT_PX:
+ if ( !(xen_processor_pmbits & XEN_PROCESSOR_PM_PX) )
+ return -ENODEV;
+ if ( !pmpt || !(pmpt->perf.init & XEN_PX_INIT) )
+ return -EINVAL;
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ switch ( op->type )
+ {
+ case PMSTAT_get_max_px:
+ {
+ op->u.getpx.total = pmpt->perf.state_count;
+ break;
+ }
+
+ case PMSTAT_get_pxstat:
+ {
+ uint64_t now, ct;
+ uint64_t total_idle_ns;
+ uint64_t tmp_idle_ns;
+ struct pm_px *pxpt = cpufreq_statistic_data[op->cpuid];
+
+ if ( !pxpt )
+ return -ENODATA;
+
+ total_idle_ns = get_cpu_idle_time(op->cpuid);
+ tmp_idle_ns = total_idle_ns - pxpt->prev_idle_wall;
+
+ now = NOW();
+ pxpt->u.usable = pmpt->perf.state_count - pmpt->perf.platform_limit;
+ pxpt->u.pt[pxpt->u.cur].residency += now - pxpt->prev_state_wall;
+ pxpt->u.pt[pxpt->u.cur].residency -= tmp_idle_ns;
+ pxpt->prev_state_wall = now;
+ pxpt->prev_idle_wall = total_idle_ns;
+
+ ct = pmpt->perf.state_count;
+ if ( copy_to_guest(op->u.getpx.trans_pt, pxpt->u.trans_pt, ct*ct) )
+ {
+ ret = -EFAULT;
+ break;
+ }
+
+ if ( copy_to_guest(op->u.getpx.pt, pxpt->u.pt, ct) )
+ {
+ ret = -EFAULT;
+ break;
+ }
+
+ op->u.getpx.total = pxpt->u.total;
+ op->u.getpx.usable = pxpt->u.usable;
+ op->u.getpx.last = pxpt->u.last;
+ op->u.getpx.cur = pxpt->u.cur;
+
+ break;
+ }
+
+ case PMSTAT_reset_pxstat:
+ {
+ cpufreq_statistic_reset(op->cpuid);
+ break;
+ }
+
+ case PMSTAT_get_max_cx:
+ {
+ op->u.getcx.nr = pmstat_get_cx_nr(op->cpuid);
+ ret = 0;
+ break;
+ }
+
+ case PMSTAT_get_cxstat:
+ {
+ ret = pmstat_get_cx_stat(op->cpuid, &op->u.getcx);
+ break;
+ }
+
+ case PMSTAT_reset_cxstat:
+ {
+ ret = pmstat_reset_cx_stat(op->cpuid);
+ break;
+ }
+
+ default:
+ printk("not defined sub-hypercall @ do_get_pm_info\n");
+ ret = -ENOSYS;
+ break;
+ }
+
+ return ret;
+}
diff -r 5274aa966231 -r 08374be21318 xen/drivers/cpufreq/Makefile
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/drivers/cpufreq/Makefile Fri Sep 26 14:04:38 2008 +0100
@@ -0,0 +1,3 @@
+obj-y += cpufreq.o
+obj-y += cpufreq_ondemand.o
+obj-y += utility.o
diff -r 5274aa966231 -r 08374be21318 xen/drivers/cpufreq/cpufreq.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/drivers/cpufreq/cpufreq.c Fri Sep 26 14:04:38 2008 +0100
@@ -0,0 +1,188 @@
+/*
+ * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@xxxxxxxxx>
+ * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@xxxxxxxxx>
+ * Copyright (C) 2002 - 2004 Dominik Brodowski <linux@xxxxxxxx>
+ * Copyright (C) 2006 Denis Sadykov <denis.m.sadykov@xxxxxxxxx>
+ *
+ * Feb 2008 - Liu Jinsong <jinsong.liu@xxxxxxxxx>
+ * Add cpufreq limit change handle and per-cpu cpufreq add/del
+ * to cope with cpu hotplug
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <xen/types.h>
+#include <xen/errno.h>
+#include <xen/delay.h>
+#include <xen/cpumask.h>
+#include <xen/sched.h>
+#include <xen/timer.h>
+#include <xen/xmalloc.h>
+#include <asm/bug.h>
+#include <asm/msr.h>
+#include <asm/io.h>
+#include <asm/config.h>
+#include <asm/processor.h>
+#include <asm/percpu.h>
+#include <asm/cpufeature.h>
+#include <acpi/acpi.h>
+#include <acpi/cpufreq/cpufreq.h>
+
+/* TODO: change to link list later as domain number may be sparse */
+static cpumask_t cpufreq_dom_map[NR_CPUS];
+
+int cpufreq_limit_change(unsigned int cpu)
+{
+ struct processor_performance *perf = &processor_pminfo[cpu]->perf;
+ struct cpufreq_policy *data = cpufreq_cpu_policy[cpu];
+ struct cpufreq_policy policy;
+
+ if (!cpu_online(cpu) || !data || !processor_pminfo[cpu])
+ return -ENODEV;
+
+ if ((perf->platform_limit < 0) ||
+ (perf->platform_limit >= perf->state_count))
+ return -EINVAL;
+
+ memcpy(&policy, data, sizeof(struct cpufreq_policy));
+
+ policy.max =
+ perf->states[perf->platform_limit].core_frequency * 1000;
+
+ return __cpufreq_set_policy(data, &policy);
+}
+
+int cpufreq_add_cpu(unsigned int cpu)
+{
+ int ret = 0;
+ unsigned int firstcpu;
+ unsigned int dom;
+ unsigned int j;
+ struct cpufreq_policy new_policy;
+ struct cpufreq_policy *policy;
+ struct processor_performance *perf = &processor_pminfo[cpu]->perf;
+
+ /* to protect the case when Px was not controlled by xen */
+ if (!processor_pminfo[cpu] || !(perf->init & XEN_PX_INIT))
+ return 0;
+
+ if (cpu_is_offline(cpu) || cpufreq_cpu_policy[cpu])
+ return -EINVAL;
+
+ ret = cpufreq_statistic_init(cpu);
+ if (ret)
+ return ret;
+
+ dom = perf->domain_info.domain;
+ if (cpus_weight(cpufreq_dom_map[dom])) {
+ /* share policy with the first cpu since on same boat */
+ firstcpu = first_cpu(cpufreq_dom_map[dom]);
+ policy = cpufreq_cpu_policy[firstcpu];
+
+ cpufreq_cpu_policy[cpu] = policy;
+ cpu_set(cpu, cpufreq_dom_map[dom]);
+ cpu_set(cpu, policy->cpus);
+
+ printk(KERN_EMERG"adding CPU %u\n", cpu);
+ } else {
+ /* for the first cpu, setup policy and do init work */
+ policy = xmalloc(struct cpufreq_policy);
+ if (!policy) {
+ cpufreq_statistic_exit(cpu);
+ return -ENOMEM;
+ }
+ memset(policy, 0, sizeof(struct cpufreq_policy));
+
+ cpufreq_cpu_policy[cpu] = policy;
+ cpu_set(cpu, cpufreq_dom_map[dom]);
+ cpu_set(cpu, policy->cpus);
+
+ policy->cpu = cpu;
+ ret = cpufreq_driver->init(policy);
+ if (ret)
+ goto err1;
+ printk(KERN_EMERG"CPU %u initialization completed\n", cpu);
+ }
+
+ /*
+ * After get full cpumap of the coordination domain,
+ * we can safely start gov here.
+ */
+ if (cpus_weight(cpufreq_dom_map[dom]) ==
+ perf->domain_info.num_processors) {
+ memcpy(&new_policy, policy, sizeof(struct cpufreq_policy));
+ policy->governor = NULL;
+ ret = __cpufreq_set_policy(policy, &new_policy);
+ if (ret)
+ goto err2;
+ }
+
+ return 0;
+
+err2:
+ cpufreq_driver->exit(policy);
+err1:
+ for_each_cpu_mask(j, cpufreq_dom_map[dom]) {
+ cpufreq_cpu_policy[j] = NULL;
+ cpufreq_statistic_exit(j);
+ }
+
+ cpus_clear(cpufreq_dom_map[dom]);
+ xfree(policy);
+ return ret;
+}
+
+int cpufreq_del_cpu(unsigned int cpu)
+{
+ unsigned int dom;
+ struct cpufreq_policy *policy;
+ struct processor_performance *perf = &processor_pminfo[cpu]->perf;
+
+ /* to protect the case when Px was not controlled by xen */
+ if (!processor_pminfo[cpu] || !(perf->init & XEN_PX_INIT))
+ return 0;
+
+ if (cpu_is_offline(cpu) || !cpufreq_cpu_policy[cpu])
+ return -EINVAL;
+
+ dom = perf->domain_info.domain;
+ policy = cpufreq_cpu_policy[cpu];
+
+ printk(KERN_EMERG"deleting CPU %u\n", cpu);
+
+ /* for the first cpu of the domain, stop gov */
+ if (cpus_weight(cpufreq_dom_map[dom]) ==
+ perf->domain_info.num_processors)
+ __cpufreq_governor(policy, CPUFREQ_GOV_STOP);
+
+ cpufreq_cpu_policy[cpu] = NULL;
+ cpu_clear(cpu, policy->cpus);
+ cpu_clear(cpu, cpufreq_dom_map[dom]);
+ cpufreq_statistic_exit(cpu);
+
+ /* for the last cpu of the domain, clean room */
+ /* It's safe here to free freq_table, drv_data and policy */
+ if (!cpus_weight(cpufreq_dom_map[dom])) {
+ cpufreq_driver->exit(policy);
+ xfree(policy);
+ }
+
+ return 0;
+}
+
diff -r 5274aa966231 -r 08374be21318 xen/drivers/cpufreq/cpufreq_ondemand.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/drivers/cpufreq/cpufreq_ondemand.c Fri Sep 26 14:04:38 2008 +0100
@@ -0,0 +1,246 @@
+/*
+ * xen/arch/x86/acpi/cpufreq/cpufreq_ondemand.c
+ *
+ * Copyright (C) 2001 Russell King
+ * (C) 2003 Venkatesh Pallipadi <venkatesh.pallipadi@xxxxxxxxx>.
+ * Jun Nakajima <jun.nakajima@xxxxxxxxx>
+ * Feb 2008 Liu Jinsong <jinsong.liu@xxxxxxxxx>
+ * Porting cpufreq_ondemand.c from Liunx 2.6.23 to Xen hypervisor
+ *
+ * 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.
+ */
+
+#include <xen/types.h>
+#include <xen/percpu.h>
+#include <xen/cpumask.h>
+#include <xen/types.h>
+#include <xen/sched.h>
+#include <xen/timer.h>
+#include <asm/config.h>
+#include <acpi/cpufreq/cpufreq.h>
+
+#define DEF_FREQUENCY_UP_THRESHOLD (80)
+
+#define MIN_DBS_INTERVAL (MICROSECS(100))
+#define MIN_SAMPLING_MILLISECS (20)
+#define MIN_STAT_SAMPLING_RATE \
+ (MIN_SAMPLING_MILLISECS * MILLISECS(1))
+#define DEF_SAMPLING_RATE_LATENCY_MULTIPLIER (1000)
+#define TRANSITION_LATENCY_LIMIT (10 * 1000 )
+
+static uint64_t def_sampling_rate;
+
+/* Sampling types */
+enum {DBS_NORMAL_SAMPLE, DBS_SUB_SAMPLE};
+
+static DEFINE_PER_CPU(struct cpu_dbs_info_s, cpu_dbs_info);
+
+static unsigned int dbs_enable; /* number of CPUs using this policy */
+
+static struct dbs_tuners {
+ uint64_t sampling_rate;
+ unsigned int up_threshold;
+ unsigned int ignore_nice;
+ unsigned int powersave_bias;
+} dbs_tuners_ins = {
+ .up_threshold = DEF_FREQUENCY_UP_THRESHOLD,
+ .ignore_nice = 0,
+ .powersave_bias = 0,
+};
+
+static struct timer dbs_timer[NR_CPUS];
+
+uint64_t get_cpu_idle_time(unsigned int cpu)
+{
+ uint64_t idle_ns;
+ struct vcpu *v;
+
+ if ((v = idle_vcpu[cpu]) == NULL)
+ return 0;
+
+ idle_ns = v->runstate.time[RUNSTATE_running];
+ if (v->is_running)
+ idle_ns += NOW() - v->runstate.state_entry_time;
+
+ return idle_ns;
+}
+
+static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info)
+{
+ unsigned int load = 0;
+ uint64_t cur_ns, idle_ns, total_ns;
+
+ struct cpufreq_policy *policy;
+ unsigned int j;
+
+ if (!this_dbs_info->enable)
+ return;
+
+ policy = this_dbs_info->cur_policy;
+
+ if (unlikely(policy->resume)) {
+ __cpufreq_driver_target(policy, policy->max,CPUFREQ_RELATION_H);
+ return;
+ }
+
+ cur_ns = NOW();
+ total_ns = cur_ns - this_dbs_info->prev_cpu_wall;
+ this_dbs_info->prev_cpu_wall = NOW();
+
+ if (total_ns < MIN_DBS_INTERVAL)
+ return;
+
+ /* Get Idle Time */
+ idle_ns = UINT_MAX;
+ for_each_cpu_mask(j, policy->cpus) {
+ uint64_t total_idle_ns;
+ unsigned int tmp_idle_ns;
+ struct cpu_dbs_info_s *j_dbs_info;
+
+ j_dbs_info = &per_cpu(cpu_dbs_info, j);
+ total_idle_ns = get_cpu_idle_time(j);
+ tmp_idle_ns = total_idle_ns - j_dbs_info->prev_cpu_idle;
+ j_dbs_info->prev_cpu_idle = total_idle_ns;
+
+ if (tmp_idle_ns < idle_ns)
+ idle_ns = tmp_idle_ns;
+ }
+
+ if (likely(total_ns > idle_ns))
+ load = (100 * (total_ns - idle_ns)) / total_ns;
+
+ /* Check for frequency increase */
+ if (load > dbs_tuners_ins.up_threshold) {
+ /* if we are already at full speed then break out early */
+ if (policy->cur == policy->max)
+ return;
+ __cpufreq_driver_target(policy, policy->max,CPUFREQ_RELATION_H);
+ return;
+ }
+
+ /* Check for frequency decrease */
+ /* if we cannot reduce the frequency anymore, break out early */
+ if (policy->cur == policy->min)
+ return;
+
+ /*
+ * The optimal frequency is the frequency that is the lowest that
+ * can support the current CPU usage without triggering the up
+ * policy. To be safe, we focus 10 points under the threshold.
+ */
+ if (load < (dbs_tuners_ins.up_threshold - 10)) {
+ unsigned int freq_next, freq_cur;
+
+ freq_cur = __cpufreq_driver_getavg(policy);
+ if (!freq_cur)
+ freq_cur = policy->cur;
+
+ freq_next = (freq_cur * load) / (dbs_tuners_ins.up_threshold - 10);
+
+ __cpufreq_driver_target(policy, freq_next, CPUFREQ_RELATION_L);
+ }
+}
+
+static void do_dbs_timer(void *dbs)
+{
+ struct cpu_dbs_info_s *dbs_info = (struct cpu_dbs_info_s *)dbs;
+
+ if (!dbs_info->enable)
+ return;
+
+ dbs_check_cpu(dbs_info);
+
+ set_timer(&dbs_timer[dbs_info->cpu], NOW()+dbs_tuners_ins.sampling_rate);
+}
+
+static void dbs_timer_init(struct cpu_dbs_info_s *dbs_info)
+{
+ dbs_info->enable = 1;
+
+ init_timer(&dbs_timer[dbs_info->cpu], do_dbs_timer,
+ (void *)dbs_info, dbs_info->cpu);
+
+ set_timer(&dbs_timer[dbs_info->cpu], NOW()+dbs_tuners_ins.sampling_rate);
+}
+
+static void dbs_timer_exit(struct cpu_dbs_info_s *dbs_info)
+{
+ dbs_info->enable = 0;
+ stop_timer(&dbs_timer[dbs_info->cpu]);
+}
+
+int cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int event)
+{
+ unsigned int cpu = policy->cpu;
+ struct cpu_dbs_info_s *this_dbs_info;
+ unsigned int j;
+
+ this_dbs_info = &per_cpu(cpu_dbs_info, cpu);
+
+ switch (event) {
+ case CPUFREQ_GOV_START:
+ if ((!cpu_online(cpu)) || (!policy->cur))
+ return -EINVAL;
+
+ if (policy->cpuinfo.transition_latency >
+ (TRANSITION_LATENCY_LIMIT * 1000)) {
+ printk(KERN_WARNING "ondemand governor failed to load "
+ "due to too long transition latency\n");
+ return -EINVAL;
+ }
+ if (this_dbs_info->enable)
+ /* Already enabled */
+ break;
+
+ dbs_enable++;
+
+ for_each_cpu_mask(j, policy->cpus) {
+ struct cpu_dbs_info_s *j_dbs_info;
+ j_dbs_info = &per_cpu(cpu_dbs_info, j);
+ j_dbs_info->cur_policy = policy;
+
+ j_dbs_info->prev_cpu_idle = get_cpu_idle_time(j);
+ j_dbs_info->prev_cpu_wall = NOW();
+ }
+ this_dbs_info->cpu = cpu;
+ /*
+ * Start the timerschedule work, when this governor
+ * is used for first time
+ */
+ if (dbs_enable == 1) {
+ def_sampling_rate = policy->cpuinfo.transition_latency *
+ DEF_SAMPLING_RATE_LATENCY_MULTIPLIER;
+
+ if (def_sampling_rate < MIN_STAT_SAMPLING_RATE)
+ def_sampling_rate = MIN_STAT_SAMPLING_RATE;
+
+ dbs_tuners_ins.sampling_rate = def_sampling_rate;
+ }
+ dbs_timer_init(this_dbs_info);
+
+ break;
+
+ case CPUFREQ_GOV_STOP:
+ dbs_timer_exit(this_dbs_info);
+ dbs_enable--;
+
+ break;
+
+ case CPUFREQ_GOV_LIMITS:
+ if (policy->max < this_dbs_info->cur_policy->cur)
+ __cpufreq_driver_target(this_dbs_info->cur_policy,
+ policy->max, CPUFREQ_RELATION_H);
+ else if (policy->min > this_dbs_info->cur_policy->cur)
+ __cpufreq_driver_target(this_dbs_info->cur_policy,
+ policy->min, CPUFREQ_RELATION_L);
+ break;
+ }
+ return 0;
+}
+
+struct cpufreq_governor cpufreq_gov_dbs = {
+ .name = "ondemand",
+ .governor = cpufreq_governor_dbs,
+};
diff -r 5274aa966231 -r 08374be21318 xen/drivers/cpufreq/utility.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/drivers/cpufreq/utility.c Fri Sep 26 14:04:38 2008 +0100
@@ -0,0 +1,368 @@
+/*
+ * utility.c - misc functions for cpufreq driver and Px statistic
+ *
+ * Copyright (C) 2001 Russell King
+ * (C) 2002 - 2003 Dominik Brodowski <linux@xxxxxxxx>
+ *
+ * Oct 2005 - Ashok Raj <ashok.raj@xxxxxxxxx>
+ * Added handling for CPU hotplug
+ * Feb 2006 - Jacob Shin <jacob.shin@xxxxxxx>
+ * Fix handling for CPU hotplug -- affected CPUs
+ * Feb 2008 - Liu Jinsong <jinsong.liu@xxxxxxxxx>
+ * 1. Merge cpufreq.c and freq_table.c of linux 2.6.23
+ * And poring to Xen hypervisor
+ * 2. some Px statistic interface funcdtions
+ *
+ * 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.
+ *
+ */
+
+#include <xen/errno.h>
+#include <xen/cpumask.h>
+#include <xen/types.h>
+#include <xen/spinlock.h>
+#include <xen/percpu.h>
+#include <xen/types.h>
+#include <xen/sched.h>
+#include <xen/timer.h>
+#include <asm/config.h>
+#include <acpi/cpufreq/cpufreq.h>
+#include <public/sysctl.h>
+
+struct cpufreq_driver *cpufreq_driver;
+struct processor_pminfo *__read_mostly processor_pminfo[NR_CPUS];
+struct cpufreq_policy *__read_mostly cpufreq_cpu_policy[NR_CPUS];
+
+/*********************************************************************
+ * Px STATISTIC INFO *
+ *********************************************************************/
+
+void cpufreq_statistic_update(cpumask_t cpumask, uint8_t from, uint8_t to)
+{
+ uint32_t i;
+ uint64_t now;
+
+ now = NOW();
+
+ for_each_cpu_mask(i, cpumask) {
+ struct pm_px *pxpt = cpufreq_statistic_data[i];
+ struct processor_pminfo *pmpt = processor_pminfo[i];
+ uint64_t total_idle_ns;
+ uint64_t tmp_idle_ns;
+
+ if ( !pxpt || !pmpt )
+ continue;
+
+ total_idle_ns = get_cpu_idle_time(i);
+ tmp_idle_ns = total_idle_ns - pxpt->prev_idle_wall;
+
+ pxpt->u.last = from;
+ pxpt->u.cur = to;
+ pxpt->u.pt[to].count++;
+ pxpt->u.pt[from].residency += now - pxpt->prev_state_wall;
+ pxpt->u.pt[from].residency -= tmp_idle_ns;
+
+ (*(pxpt->u.trans_pt + from * pmpt->perf.state_count + to))++;
+
+ pxpt->prev_state_wall = now;
+ pxpt->prev_idle_wall = total_idle_ns;
+ }
+}
+
+int cpufreq_statistic_init(unsigned int cpuid)
+{
+ uint32_t i, count;
+ struct pm_px *pxpt = cpufreq_statistic_data[cpuid];
+ const struct processor_pminfo *pmpt = processor_pminfo[cpuid];
+
+ count = pmpt->perf.state_count;
+
+ if ( !pmpt )
+ return -EINVAL;
+
+ if ( !pxpt )
+ {
+ pxpt = xmalloc(struct pm_px);
+ if ( !pxpt )
+ return -ENOMEM;
+ memset(pxpt, 0, sizeof(*pxpt));
+ cpufreq_statistic_data[cpuid] = pxpt;
+ }
+
+ pxpt->u.trans_pt = xmalloc_array(uint64_t, count * count);
+ if (!pxpt->u.trans_pt)
+ return -ENOMEM;
+
+ pxpt->u.pt = xmalloc_array(struct pm_px_val, count);
+ if (!pxpt->u.pt) {
+ xfree(pxpt->u.trans_pt);
+ return -ENOMEM;
+ }
+
+ memset(pxpt->u.trans_pt, 0, count * count * (sizeof(uint64_t)));
+ memset(pxpt->u.pt, 0, count * (sizeof(struct pm_px_val)));
+
+ pxpt->u.total = pmpt->perf.state_count;
+ pxpt->u.usable = pmpt->perf.state_count - pmpt->perf.platform_limit;
+
+ for (i=0; i < pmpt->perf.state_count; i++)
+ pxpt->u.pt[i].freq = pmpt->perf.states[i].core_frequency;
+
+ pxpt->prev_state_wall = NOW();
+ pxpt->prev_idle_wall = get_cpu_idle_time(cpuid);
+
+ return 0;
+}
+
+void cpufreq_statistic_exit(unsigned int cpuid)
+{
+ struct pm_px *pxpt = cpufreq_statistic_data[cpuid];
+
+ if (!pxpt)
+ return;
+ xfree(pxpt->u.trans_pt);
+ xfree(pxpt->u.pt);
+ memset(pxpt, 0, sizeof(struct pm_px));
+}
+
+void cpufreq_statistic_reset(unsigned int cpuid)
+{
+ uint32_t i, j, count;
+ struct pm_px *pxpt = cpufreq_statistic_data[cpuid];
+ const struct processor_pminfo *pmpt = processor_pminfo[cpuid];
+
+ if ( !pxpt || !pmpt )
+ return;
+
+ count = pmpt->perf.state_count;
+
+ for (i=0; i < count; i++) {
+ pxpt->u.pt[i].residency = 0;
+ pxpt->u.pt[i].count = 0;
+
+ for (j=0; j < count; j++)
+ *(pxpt->u.trans_pt + i*count + j) = 0;
+ }
+
+ pxpt->prev_state_wall = NOW();
+ pxpt->prev_idle_wall = get_cpu_idle_time(cpuid);
+}
+
+
+/*********************************************************************
+ * FREQUENCY TABLE HELPERS *
+ *********************************************************************/
+
+int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
+ struct cpufreq_frequency_table *table)
+{
+ unsigned int min_freq = ~0;
+ unsigned int max_freq = 0;
+ unsigned int i;
+
+ for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
+ unsigned int freq = table[i].frequency;
+ if (freq == CPUFREQ_ENTRY_INVALID)
+ continue;
+ if (freq < min_freq)
+ min_freq = freq;
+ if (freq > max_freq)
+ max_freq = freq;
+ }
+
+ policy->min = policy->cpuinfo.min_freq = min_freq;
+ policy->max = policy->cpuinfo.max_freq = max_freq;
+
+ if (policy->min == ~0)
+ return -EINVAL;
+ else
+ return 0;
+}
+
+int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
+ struct cpufreq_frequency_table *table)
+{
+ unsigned int next_larger = ~0;
+ unsigned int i;
+ unsigned int count = 0;
+
+ if (!cpu_online(policy->cpu))
+ return -EINVAL;
+
+ cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
+ policy->cpuinfo.max_freq);
+
+ for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
+ unsigned int freq = table[i].frequency;
+ if (freq == CPUFREQ_ENTRY_INVALID)
+ continue;
+ if ((freq >= policy->min) && (freq <= policy->max))
+ count++;
+ else if ((next_larger > freq) && (freq > policy->max))
+ next_larger = freq;
+ }
+
+ if (!count)
+ policy->max = next_larger;
+
+ cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
+ policy->cpuinfo.max_freq);
+
+ return 0;
+}
+
+int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
+ struct cpufreq_frequency_table *table,
+ unsigned int target_freq,
+ unsigned int relation,
+ unsigned int *index)
+{
+ struct cpufreq_frequency_table optimal = {
+ .index = ~0,
+ .frequency = 0,
+ };
+ struct cpufreq_frequency_table suboptimal = {
+ .index = ~0,
+ .frequency = 0,
+ };
+ unsigned int i;
+
+ switch (relation) {
+ case CPUFREQ_RELATION_H:
+ suboptimal.frequency = ~0;
+ break;
+ case CPUFREQ_RELATION_L:
+ optimal.frequency = ~0;
+ break;
+ }
+
+ if (!cpu_online(policy->cpu))
+ return -EINVAL;
+
+ for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
+ unsigned int freq = table[i].frequency;
+ if (freq == CPUFREQ_ENTRY_INVALID)
+ continue;
+ if ((freq < policy->min) || (freq > policy->max))
+ continue;
+ switch(relation) {
+ case CPUFREQ_RELATION_H:
+ if (freq <= target_freq) {
+ if (freq >= optimal.frequency) {
+ optimal.frequency = freq;
+ optimal.index = i;
+ }
+ } else {
+ if (freq <= suboptimal.frequency) {
+ suboptimal.frequency = freq;
+ suboptimal.index = i;
+ }
+ }
+ break;
+ case CPUFREQ_RELATION_L:
+ if (freq >= target_freq) {
+ if (freq <= optimal.frequency) {
+ optimal.frequency = freq;
+ optimal.index = i;
+ }
+ } else {
+ if (freq >= suboptimal.frequency) {
+ suboptimal.frequency = freq;
+ suboptimal.index = i;
+ }
+ }
+ break;
+ }
+ }
+ if (optimal.index > i) {
+ if (suboptimal.index > i)
+ return -EINVAL;
+ *index = suboptimal.index;
+ } else
+ *index = optimal.index;
+
+ return 0;
+}
+
+
+/*********************************************************************
+ * GOVERNORS *
+ *********************************************************************/
+
+int __cpufreq_driver_target(struct cpufreq_policy *policy,
+ unsigned int target_freq,
+ unsigned int relation)
+{
+ int retval = -EINVAL;
+
+ if (cpu_online(policy->cpu) && cpufreq_driver->target)
+ retval = cpufreq_driver->target(policy, target_freq, relation);
+
+ return retval;
+}
+
+int __cpufreq_driver_getavg(struct cpufreq_policy *policy)
+{
+ int ret = 0;
+
+ if (!policy)
+ return -EINVAL;
+
+ if (cpu_online(policy->cpu) && cpufreq_driver->getavg)
+ ret = cpufreq_driver->getavg(policy->cpu);
+
+ return ret;
+}
+
+
+/*********************************************************************
+ * POLICY *
+ *********************************************************************/
+
+/*
+ * data : current policy.
+ * policy : policy to be set.
+ */
+int __cpufreq_set_policy(struct cpufreq_policy *data,
+ struct cpufreq_policy *policy)
+{
+ int ret = 0;
+
+ memcpy(&policy->cpuinfo, &data->cpuinfo, sizeof(struct cpufreq_cpuinfo));
+
+ if (policy->min > data->min && policy->min > policy->max)
+ return -EINVAL;
+
+ /* verify the cpu speed can be set within this limit */
+ ret = cpufreq_driver->verify(policy);
+ if (ret)
+ return ret;
+
+ data->min = policy->min;
+ data->max = policy->max;
+
+ if (policy->governor != data->governor) {
+ /* save old, working values */
+ struct cpufreq_governor *old_gov = data->governor;
+
+ /* end old governor */
+ if (data->governor)
+ __cpufreq_governor(data, CPUFREQ_GOV_STOP);
+
+ /* start new governor */
+ data->governor = policy->governor;
+ if (__cpufreq_governor(data, CPUFREQ_GOV_START)) {
+ /* new governor failed, so re-start old one */
+ if (old_gov) {
+ data->governor = old_gov;
+ __cpufreq_governor(data, CPUFREQ_GOV_START);
+ }
+ return -EINVAL;
+ }
+ /* might be a policy change, too, so fall through */
+ }
+
+ return __cpufreq_governor(data, CPUFREQ_GOV_LIMITS);
+}
diff -r 5274aa966231 -r 08374be21318 xen/include/acpi/cpufreq/cpufreq.h
--- a/xen/include/acpi/cpufreq/cpufreq.h Fri Sep 26 11:12:29 2008 +0100
+++ b/xen/include/acpi/cpufreq/cpufreq.h Fri Sep 26 14:04:38 2008 +0100
@@ -20,6 +20,13 @@
#define CPUFREQ_NAME_LEN 16
struct cpufreq_governor;
+
+struct acpi_cpufreq_data {
+ struct processor_performance *acpi_data;
+ struct cpufreq_frequency_table *freq_table;
+ unsigned int max_freq;
+ unsigned int cpu_feature;
+};
struct cpufreq_cpuinfo {
unsigned int max_freq;
diff -r 5274aa966231 -r 08374be21318 xen/include/acpi/cpufreq/processor_perf.h
--- a/xen/include/acpi/cpufreq/processor_perf.h Fri Sep 26 11:12:29 2008 +0100
+++ b/xen/include/acpi/cpufreq/processor_perf.h Fri Sep 26 14:04:38 2008 +0100
@@ -9,10 +9,10 @@ int get_cpu_id(u8);
int get_cpu_id(u8);
int powernow_cpufreq_init(void);
-void px_statistic_update(cpumask_t, uint8_t, uint8_t);
-int px_statistic_init(unsigned int);
-void px_statistic_exit(unsigned int);
-void px_statistic_reset(unsigned int);
+void cpufreq_statistic_update(cpumask_t, uint8_t, uint8_t);
+int cpufreq_statistic_init(unsigned int);
+void cpufreq_statistic_exit(unsigned int);
+void cpufreq_statistic_reset(unsigned int);
int cpufreq_limit_change(unsigned int);
@@ -58,6 +58,6 @@ struct pm_px {
uint64_t prev_idle_wall;
};
-extern struct pm_px *px_statistic_data[NR_CPUS];
+extern struct pm_px *cpufreq_statistic_data[NR_CPUS];
#endif /* __XEN_PROCESSOR_PM_H__ */
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