aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--Documentation/ABI/testing/sysfs-devices-system-cpu18
-rw-r--r--Documentation/cpu-freq/cpu-drivers.txt6
-rw-r--r--Documentation/cpu-freq/user-guide.txt11
-rw-r--r--arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c17
-rw-r--r--arch/x86/kernel/cpu/cpufreq/powernow-k6.c2
-rw-r--r--arch/x86/kernel/cpu/cpufreq/powernow-k7.c19
-rw-r--r--arch/x86/kernel/cpu/cpufreq/powernow-k8.c32
-rw-r--r--arch/x86/kernel/cpu/cpufreq/speedstep-ich.c2
-rw-r--r--arch/x86/kernel/cpu/cpufreq/speedstep-lib.c6
-rw-r--r--arch/x86/kernel/cpu/cpufreq/speedstep-lib.h24
-rw-r--r--arch/x86/kernel/cpu/cpufreq/speedstep-smi.c2
-rw-r--r--drivers/acpi/processor_perflib.c13
-rw-r--r--drivers/cpufreq/cpufreq.c34
-rw-r--r--drivers/cpufreq/cpufreq_conservative.c129
-rw-r--r--include/acpi/processor.h6
-rw-r--r--include/linux/cpufreq.h1
16 files changed, 248 insertions, 74 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index a703b9e9aeb9..974e29f5da86 100644
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -136,6 +136,24 @@ Description: Discover cpuidle policy and mechanism
136 See files in Documentation/cpuidle/ for more information. 136 See files in Documentation/cpuidle/ for more information.
137 137
138 138
139What: /sys/devices/system/cpu/cpu#/cpufreq/*
140Date: pre-git history
141Contact: cpufreq@vger.kernel.org
142Description: Discover and change clock speed of CPUs
143
144 Clock scaling allows you to change the clock speed of the
145 CPUs on the fly. This is a nice method to save battery
146 power, because the lower the clock speed, the less power
147 the CPU consumes.
148
149 There are many knobs to tweak in this directory.
150
151 See files in Documentation/cpu-freq/ for more information.
152
153 In particular, read Documentation/cpu-freq/user-guide.txt
154 to learn how to control the knobs.
155
156
139What: /sys/devices/system/cpu/cpu*/cache/index*/cache_disable_X 157What: /sys/devices/system/cpu/cpu*/cache/index*/cache_disable_X
140Date: August 2008 158Date: August 2008
141KernelVersion: 2.6.27 159KernelVersion: 2.6.27
diff --git a/Documentation/cpu-freq/cpu-drivers.txt b/Documentation/cpu-freq/cpu-drivers.txt
index 75a58d14d3cf..6c30e930c122 100644
--- a/Documentation/cpu-freq/cpu-drivers.txt
+++ b/Documentation/cpu-freq/cpu-drivers.txt
@@ -92,9 +92,9 @@ policy->cpuinfo.max_freq - the minimum and maximum frequency
92 (in kHz) which is supported by 92 (in kHz) which is supported by
93 this CPU 93 this CPU
94policy->cpuinfo.transition_latency the time it takes on this CPU to 94policy->cpuinfo.transition_latency the time it takes on this CPU to
95 switch between two frequencies (if 95 switch between two frequencies in
96 appropriate, else specify 96 nanoseconds (if appropriate, else
97 CPUFREQ_ETERNAL) 97 specify CPUFREQ_ETERNAL)
98 98
99policy->cur The current operating frequency of 99policy->cur The current operating frequency of
100 this CPU (if appropriate) 100 this CPU (if appropriate)
diff --git a/Documentation/cpu-freq/user-guide.txt b/Documentation/cpu-freq/user-guide.txt
index 2a5b850847c0..04f6b32993e6 100644
--- a/Documentation/cpu-freq/user-guide.txt
+++ b/Documentation/cpu-freq/user-guide.txt
@@ -203,6 +203,17 @@ scaling_cur_freq : Current frequency of the CPU as determined by
203 the frequency the kernel thinks the CPU runs 203 the frequency the kernel thinks the CPU runs
204 at. 204 at.
205 205
206bios_limit : If the BIOS tells the OS to limit a CPU to
207 lower frequencies, the user can read out the
208 maximum available frequency from this file.
209 This typically can happen through (often not
210 intended) BIOS settings, restrictions
211 triggered through a service processor or other
212 BIOS/HW based implementations.
213 This does not cover thermal ACPI limitations
214 which can be detected through the generic
215 thermal driver.
216
206If you have selected the "userspace" governor which allows you to 217If you have selected the "userspace" governor which allows you to
207set the CPU operating frequency to a specific value, you can read out 218set the CPU operating frequency to a specific value, you can read out
208the current frequency in 219the current frequency in
diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index 8b581d3905cb..d2e7c77c1ea4 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -764,14 +764,15 @@ static struct freq_attr *acpi_cpufreq_attr[] = {
764}; 764};
765 765
766static struct cpufreq_driver acpi_cpufreq_driver = { 766static struct cpufreq_driver acpi_cpufreq_driver = {
767 .verify = acpi_cpufreq_verify, 767 .verify = acpi_cpufreq_verify,
768 .target = acpi_cpufreq_target, 768 .target = acpi_cpufreq_target,
769 .init = acpi_cpufreq_cpu_init, 769 .bios_limit = acpi_processor_get_bios_limit,
770 .exit = acpi_cpufreq_cpu_exit, 770 .init = acpi_cpufreq_cpu_init,
771 .resume = acpi_cpufreq_resume, 771 .exit = acpi_cpufreq_cpu_exit,
772 .name = "acpi-cpufreq", 772 .resume = acpi_cpufreq_resume,
773 .owner = THIS_MODULE, 773 .name = "acpi-cpufreq",
774 .attr = acpi_cpufreq_attr, 774 .owner = THIS_MODULE,
775 .attr = acpi_cpufreq_attr,
775}; 776};
776 777
777static int __init acpi_cpufreq_init(void) 778static int __init acpi_cpufreq_init(void)
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k6.c b/arch/x86/kernel/cpu/cpufreq/powernow-k6.c
index f10dea409f40..cb01dac267d3 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k6.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k6.c
@@ -164,7 +164,7 @@ static int powernow_k6_cpu_init(struct cpufreq_policy *policy)
164 } 164 }
165 165
166 /* cpuinfo and default policy values */ 166 /* cpuinfo and default policy values */
167 policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; 167 policy->cpuinfo.transition_latency = 200000;
168 policy->cur = busfreq * max_multiplier; 168 policy->cur = busfreq * max_multiplier;
169 169
170 result = cpufreq_frequency_table_cpuinfo(policy, clock_ratio); 170 result = cpufreq_frequency_table_cpuinfo(policy, clock_ratio);
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k7.c b/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
index d47c775eb0ab..9a97116f89e5 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
@@ -714,14 +714,17 @@ static struct freq_attr *powernow_table_attr[] = {
714}; 714};
715 715
716static struct cpufreq_driver powernow_driver = { 716static struct cpufreq_driver powernow_driver = {
717 .verify = powernow_verify, 717 .verify = powernow_verify,
718 .target = powernow_target, 718 .target = powernow_target,
719 .get = powernow_get, 719 .get = powernow_get,
720 .init = powernow_cpu_init, 720#ifdef CONFIG_X86_POWERNOW_K7_ACPI
721 .exit = powernow_cpu_exit, 721 .bios_limit = acpi_processor_get_bios_limit,
722 .name = "powernow-k7", 722#endif
723 .owner = THIS_MODULE, 723 .init = powernow_cpu_init,
724 .attr = powernow_table_attr, 724 .exit = powernow_cpu_exit,
725 .name = "powernow-k7",
726 .owner = THIS_MODULE,
727 .attr = powernow_table_attr,
725}; 728};
726 729
727static int __init powernow_init(void) 730static int __init powernow_init(void)
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index 3f12dabeab52..a9df9441a9a2 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -1118,7 +1118,7 @@ static int transition_frequency_pstate(struct powernow_k8_data *data,
1118static int powernowk8_target(struct cpufreq_policy *pol, 1118static int powernowk8_target(struct cpufreq_policy *pol,
1119 unsigned targfreq, unsigned relation) 1119 unsigned targfreq, unsigned relation)
1120{ 1120{
1121 cpumask_t oldmask; 1121 cpumask_var_t oldmask;
1122 struct powernow_k8_data *data = per_cpu(powernow_data, pol->cpu); 1122 struct powernow_k8_data *data = per_cpu(powernow_data, pol->cpu);
1123 u32 checkfid; 1123 u32 checkfid;
1124 u32 checkvid; 1124 u32 checkvid;
@@ -1131,9 +1131,13 @@ static int powernowk8_target(struct cpufreq_policy *pol,
1131 checkfid = data->currfid; 1131 checkfid = data->currfid;
1132 checkvid = data->currvid; 1132 checkvid = data->currvid;
1133 1133
1134 /* only run on specific CPU from here on */ 1134 /* only run on specific CPU from here on. */
1135 oldmask = current->cpus_allowed; 1135 /* This is poor form: use a workqueue or smp_call_function_single */
1136 set_cpus_allowed_ptr(current, &cpumask_of_cpu(pol->cpu)); 1136 if (!alloc_cpumask_var(&oldmask, GFP_KERNEL))
1137 return -ENOMEM;
1138
1139 cpumask_copy(oldmask, tsk_cpumask(current));
1140 set_cpus_allowed_ptr(current, cpumask_of(pol->cpu));
1137 1141
1138 if (smp_processor_id() != pol->cpu) { 1142 if (smp_processor_id() != pol->cpu) {
1139 printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu); 1143 printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu);
@@ -1193,7 +1197,8 @@ static int powernowk8_target(struct cpufreq_policy *pol,
1193 ret = 0; 1197 ret = 0;
1194 1198
1195err_out: 1199err_out:
1196 set_cpus_allowed_ptr(current, &oldmask); 1200 set_cpus_allowed_ptr(current, oldmask);
1201 free_cpumask_var(oldmask);
1197 return ret; 1202 return ret;
1198} 1203}
1199 1204
@@ -1393,14 +1398,15 @@ static struct freq_attr *powernow_k8_attr[] = {
1393}; 1398};
1394 1399
1395static struct cpufreq_driver cpufreq_amd64_driver = { 1400static struct cpufreq_driver cpufreq_amd64_driver = {
1396 .verify = powernowk8_verify, 1401 .verify = powernowk8_verify,
1397 .target = powernowk8_target, 1402 .target = powernowk8_target,
1398 .init = powernowk8_cpu_init, 1403 .bios_limit = acpi_processor_get_bios_limit,
1399 .exit = __devexit_p(powernowk8_cpu_exit), 1404 .init = powernowk8_cpu_init,
1400 .get = powernowk8_get, 1405 .exit = __devexit_p(powernowk8_cpu_exit),
1401 .name = "powernow-k8", 1406 .get = powernowk8_get,
1402 .owner = THIS_MODULE, 1407 .name = "powernow-k8",
1403 .attr = powernow_k8_attr, 1408 .owner = THIS_MODULE,
1409 .attr = powernow_k8_attr,
1404}; 1410};
1405 1411
1406/* driver entry point for init */ 1412/* driver entry point for init */
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c b/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
index 3ae5a7a3a500..2ce8e0b5cc54 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
@@ -39,7 +39,7 @@ static struct pci_dev *speedstep_chipset_dev;
39 39
40/* speedstep_processor 40/* speedstep_processor
41 */ 41 */
42static unsigned int speedstep_processor; 42static enum speedstep_processor speedstep_processor;
43 43
44static u32 pmbase; 44static u32 pmbase;
45 45
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c b/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
index f4c290b8482f..ad0083abfa23 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
@@ -34,7 +34,7 @@ static int relaxed_check;
34 * GET PROCESSOR CORE SPEED IN KHZ * 34 * GET PROCESSOR CORE SPEED IN KHZ *
35 *********************************************************************/ 35 *********************************************************************/
36 36
37static unsigned int pentium3_get_frequency(unsigned int processor) 37static unsigned int pentium3_get_frequency(enum speedstep_processor processor)
38{ 38{
39 /* See table 14 of p3_ds.pdf and table 22 of 29834003.pdf */ 39 /* See table 14 of p3_ds.pdf and table 22 of 29834003.pdf */
40 struct { 40 struct {
@@ -227,7 +227,7 @@ static unsigned int pentium4_get_frequency(void)
227 227
228 228
229/* Warning: may get called from smp_call_function_single. */ 229/* Warning: may get called from smp_call_function_single. */
230unsigned int speedstep_get_frequency(unsigned int processor) 230unsigned int speedstep_get_frequency(enum speedstep_processor processor)
231{ 231{
232 switch (processor) { 232 switch (processor) {
233 case SPEEDSTEP_CPU_PCORE: 233 case SPEEDSTEP_CPU_PCORE:
@@ -380,7 +380,7 @@ EXPORT_SYMBOL_GPL(speedstep_detect_processor);
380 * DETECT SPEEDSTEP SPEEDS * 380 * DETECT SPEEDSTEP SPEEDS *
381 *********************************************************************/ 381 *********************************************************************/
382 382
383unsigned int speedstep_get_freqs(unsigned int processor, 383unsigned int speedstep_get_freqs(enum speedstep_processor processor,
384 unsigned int *low_speed, 384 unsigned int *low_speed,
385 unsigned int *high_speed, 385 unsigned int *high_speed,
386 unsigned int *transition_latency, 386 unsigned int *transition_latency,
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-lib.h b/arch/x86/kernel/cpu/cpufreq/speedstep-lib.h
index 2b6c04e5a304..70d9cea1219d 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-lib.h
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-lib.h
@@ -11,18 +11,18 @@
11 11
12 12
13/* processors */ 13/* processors */
14 14enum speedstep_processor {
15#define SPEEDSTEP_CPU_PIII_C_EARLY 0x00000001 /* Coppermine core */ 15 SPEEDSTEP_CPU_PIII_C_EARLY = 0x00000001, /* Coppermine core */
16#define SPEEDSTEP_CPU_PIII_C 0x00000002 /* Coppermine core */ 16 SPEEDSTEP_CPU_PIII_C = 0x00000002, /* Coppermine core */
17#define SPEEDSTEP_CPU_PIII_T 0x00000003 /* Tualatin core */ 17 SPEEDSTEP_CPU_PIII_T = 0x00000003, /* Tualatin core */
18#define SPEEDSTEP_CPU_P4M 0x00000004 /* P4-M */ 18 SPEEDSTEP_CPU_P4M = 0x00000004, /* P4-M */
19
20/* the following processors are not speedstep-capable and are not auto-detected 19/* the following processors are not speedstep-capable and are not auto-detected
21 * in speedstep_detect_processor(). However, their speed can be detected using 20 * in speedstep_detect_processor(). However, their speed can be detected using
22 * the speedstep_get_frequency() call. */ 21 * the speedstep_get_frequency() call. */
23#define SPEEDSTEP_CPU_PM 0xFFFFFF03 /* Pentium M */ 22 SPEEDSTEP_CPU_PM = 0xFFFFFF03, /* Pentium M */
24#define SPEEDSTEP_CPU_P4D 0xFFFFFF04 /* desktop P4 */ 23 SPEEDSTEP_CPU_P4D = 0xFFFFFF04, /* desktop P4 */
25#define SPEEDSTEP_CPU_PCORE 0xFFFFFF05 /* Core */ 24 SPEEDSTEP_CPU_PCORE = 0xFFFFFF05, /* Core */
25};
26 26
27/* speedstep states -- only two of them */ 27/* speedstep states -- only two of them */
28 28
@@ -31,10 +31,10 @@
31 31
32 32
33/* detect a speedstep-capable processor */ 33/* detect a speedstep-capable processor */
34extern unsigned int speedstep_detect_processor (void); 34extern enum speedstep_processor speedstep_detect_processor(void);
35 35
36/* detect the current speed (in khz) of the processor */ 36/* detect the current speed (in khz) of the processor */
37extern unsigned int speedstep_get_frequency(unsigned int processor); 37extern unsigned int speedstep_get_frequency(enum speedstep_processor processor);
38 38
39 39
40/* detect the low and high speeds of the processor. The callback 40/* detect the low and high speeds of the processor. The callback
@@ -42,7 +42,7 @@ extern unsigned int speedstep_get_frequency(unsigned int processor);
42 * SPEEDSTEP_LOW; the second argument is zero so that no 42 * SPEEDSTEP_LOW; the second argument is zero so that no
43 * cpufreq_notify_transition calls are initiated. 43 * cpufreq_notify_transition calls are initiated.
44 */ 44 */
45extern unsigned int speedstep_get_freqs(unsigned int processor, 45extern unsigned int speedstep_get_freqs(enum speedstep_processor processor,
46 unsigned int *low_speed, 46 unsigned int *low_speed,
47 unsigned int *high_speed, 47 unsigned int *high_speed,
48 unsigned int *transition_latency, 48 unsigned int *transition_latency,
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-smi.c b/arch/x86/kernel/cpu/cpufreq/speedstep-smi.c
index befea088e4f5..04d73c114e49 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-smi.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-smi.c
@@ -35,7 +35,7 @@ static int smi_cmd;
35static unsigned int smi_sig; 35static unsigned int smi_sig;
36 36
37/* info about the processor */ 37/* info about the processor */
38static unsigned int speedstep_processor; 38static enum speedstep_processor speedstep_processor;
39 39
40/* 40/*
41 * There are only two frequency states for each processor. Values 41 * There are only two frequency states for each processor. Values
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 8ba0ed0b9ddb..01e366d2b6fb 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -167,6 +167,19 @@ int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
167 return cpufreq_update_policy(pr->id); 167 return cpufreq_update_policy(pr->id);
168} 168}
169 169
170int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
171{
172 struct acpi_processor *pr;
173
174 pr = per_cpu(processors, cpu);
175 if (!pr || !pr->performance || !pr->performance->state_count)
176 return -ENODEV;
177 *limit = pr->performance->states[pr->performance_platform_limit].
178 core_frequency * 1000;
179 return 0;
180}
181EXPORT_SYMBOL(acpi_processor_get_bios_limit);
182
170void acpi_processor_ppc_init(void) 183void acpi_processor_ppc_init(void)
171{ 184{
172 if (!cpufreq_register_notifier 185 if (!cpufreq_register_notifier
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index ff57c40e9b8b..f20668c09ce0 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -647,6 +647,21 @@ static ssize_t show_scaling_setspeed(struct cpufreq_policy *policy, char *buf)
647 return policy->governor->show_setspeed(policy, buf); 647 return policy->governor->show_setspeed(policy, buf);
648} 648}
649 649
650/**
651 * show_scaling_driver - show the current cpufreq HW/BIOS limitation
652 */
653static ssize_t show_bios_limit(struct cpufreq_policy *policy, char *buf)
654{
655 unsigned int limit;
656 int ret;
657 if (cpufreq_driver->bios_limit) {
658 ret = cpufreq_driver->bios_limit(policy->cpu, &limit);
659 if (!ret)
660 return sprintf(buf, "%u\n", limit);
661 }
662 return sprintf(buf, "%u\n", policy->cpuinfo.max_freq);
663}
664
650#define define_one_ro(_name) \ 665#define define_one_ro(_name) \
651static struct freq_attr _name = \ 666static struct freq_attr _name = \
652__ATTR(_name, 0444, show_##_name, NULL) 667__ATTR(_name, 0444, show_##_name, NULL)
@@ -666,6 +681,7 @@ define_one_ro(cpuinfo_transition_latency);
666define_one_ro(scaling_available_governors); 681define_one_ro(scaling_available_governors);
667define_one_ro(scaling_driver); 682define_one_ro(scaling_driver);
668define_one_ro(scaling_cur_freq); 683define_one_ro(scaling_cur_freq);
684define_one_ro(bios_limit);
669define_one_ro(related_cpus); 685define_one_ro(related_cpus);
670define_one_ro(affected_cpus); 686define_one_ro(affected_cpus);
671define_one_rw(scaling_min_freq); 687define_one_rw(scaling_min_freq);
@@ -767,8 +783,9 @@ static struct kobj_type ktype_cpufreq = {
767 * 0: Success 783 * 0: Success
768 * Positive: When we have a managed CPU and the sysfs got symlinked 784 * Positive: When we have a managed CPU and the sysfs got symlinked
769 */ 785 */
770int cpufreq_add_dev_policy(unsigned int cpu, struct cpufreq_policy *policy, 786static int cpufreq_add_dev_policy(unsigned int cpu,
771 struct sys_device *sys_dev) 787 struct cpufreq_policy *policy,
788 struct sys_device *sys_dev)
772{ 789{
773 int ret = 0; 790 int ret = 0;
774#ifdef CONFIG_SMP 791#ifdef CONFIG_SMP
@@ -842,7 +859,8 @@ int cpufreq_add_dev_policy(unsigned int cpu, struct cpufreq_policy *policy,
842 859
843 860
844/* symlink affected CPUs */ 861/* symlink affected CPUs */
845int cpufreq_add_dev_symlink(unsigned int cpu, struct cpufreq_policy *policy) 862static int cpufreq_add_dev_symlink(unsigned int cpu,
863 struct cpufreq_policy *policy)
846{ 864{
847 unsigned int j; 865 unsigned int j;
848 int ret = 0; 866 int ret = 0;
@@ -869,8 +887,9 @@ int cpufreq_add_dev_symlink(unsigned int cpu, struct cpufreq_policy *policy)
869 return ret; 887 return ret;
870} 888}
871 889
872int cpufreq_add_dev_interface(unsigned int cpu, struct cpufreq_policy *policy, 890static int cpufreq_add_dev_interface(unsigned int cpu,
873 struct sys_device *sys_dev) 891 struct cpufreq_policy *policy,
892 struct sys_device *sys_dev)
874{ 893{
875 struct cpufreq_policy new_policy; 894 struct cpufreq_policy new_policy;
876 struct freq_attr **drv_attr; 895 struct freq_attr **drv_attr;
@@ -902,6 +921,11 @@ int cpufreq_add_dev_interface(unsigned int cpu, struct cpufreq_policy *policy,
902 if (ret) 921 if (ret)
903 goto err_out_kobj_put; 922 goto err_out_kobj_put;
904 } 923 }
924 if (cpufreq_driver->bios_limit) {
925 ret = sysfs_create_file(&policy->kobj, &bios_limit.attr);
926 if (ret)
927 goto err_out_kobj_put;
928 }
905 929
906 spin_lock_irqsave(&cpufreq_driver_lock, flags); 930 spin_lock_irqsave(&cpufreq_driver_lock, flags);
907 for_each_cpu(j, policy->cpus) { 931 for_each_cpu(j, policy->cpus) {
diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c
index c7b081b839ff..599a40b25cb0 100644
--- a/drivers/cpufreq/cpufreq_conservative.c
+++ b/drivers/cpufreq/cpufreq_conservative.c
@@ -164,20 +164,22 @@ static struct notifier_block dbs_cpufreq_notifier_block = {
164}; 164};
165 165
166/************************** sysfs interface ************************/ 166/************************** sysfs interface ************************/
167static ssize_t show_sampling_rate_max(struct cpufreq_policy *policy, char *buf) 167static ssize_t show_sampling_rate_max(struct kobject *kobj,
168 struct attribute *attr, char *buf)
168{ 169{
169 printk_once(KERN_INFO "CPUFREQ: conservative sampling_rate_max " 170 printk_once(KERN_INFO "CPUFREQ: conservative sampling_rate_max "
170 "sysfs file is deprecated - used by: %s\n", current->comm); 171 "sysfs file is deprecated - used by: %s\n", current->comm);
171 return sprintf(buf, "%u\n", -1U); 172 return sprintf(buf, "%u\n", -1U);
172} 173}
173 174
174static ssize_t show_sampling_rate_min(struct cpufreq_policy *policy, char *buf) 175static ssize_t show_sampling_rate_min(struct kobject *kobj,
176 struct attribute *attr, char *buf)
175{ 177{
176 return sprintf(buf, "%u\n", min_sampling_rate); 178 return sprintf(buf, "%u\n", min_sampling_rate);
177} 179}
178 180
179#define define_one_ro(_name) \ 181#define define_one_ro(_name) \
180static struct freq_attr _name = \ 182static struct global_attr _name = \
181__ATTR(_name, 0444, show_##_name, NULL) 183__ATTR(_name, 0444, show_##_name, NULL)
182 184
183define_one_ro(sampling_rate_max); 185define_one_ro(sampling_rate_max);
@@ -186,7 +188,7 @@ define_one_ro(sampling_rate_min);
186/* cpufreq_conservative Governor Tunables */ 188/* cpufreq_conservative Governor Tunables */
187#define show_one(file_name, object) \ 189#define show_one(file_name, object) \
188static ssize_t show_##file_name \ 190static ssize_t show_##file_name \
189(struct cpufreq_policy *unused, char *buf) \ 191(struct kobject *kobj, struct attribute *attr, char *buf) \
190{ \ 192{ \
191 return sprintf(buf, "%u\n", dbs_tuners_ins.object); \ 193 return sprintf(buf, "%u\n", dbs_tuners_ins.object); \
192} 194}
@@ -197,8 +199,40 @@ show_one(down_threshold, down_threshold);
197show_one(ignore_nice_load, ignore_nice); 199show_one(ignore_nice_load, ignore_nice);
198show_one(freq_step, freq_step); 200show_one(freq_step, freq_step);
199 201
200static ssize_t store_sampling_down_factor(struct cpufreq_policy *unused, 202/*** delete after deprecation time ***/
201 const char *buf, size_t count) 203#define DEPRECATION_MSG(file_name) \
204 printk_once(KERN_INFO "CPUFREQ: Per core conservative sysfs " \
205 "interface is deprecated - " #file_name "\n");
206
207#define show_one_old(file_name) \
208static ssize_t show_##file_name##_old \
209(struct cpufreq_policy *unused, char *buf) \
210{ \
211 printk_once(KERN_INFO "CPUFREQ: Per core conservative sysfs " \
212 "interface is deprecated - " #file_name "\n"); \
213 return show_##file_name(NULL, NULL, buf); \
214}
215show_one_old(sampling_rate);
216show_one_old(sampling_down_factor);
217show_one_old(up_threshold);
218show_one_old(down_threshold);
219show_one_old(ignore_nice_load);
220show_one_old(freq_step);
221show_one_old(sampling_rate_min);
222show_one_old(sampling_rate_max);
223
224#define define_one_ro_old(object, _name) \
225static struct freq_attr object = \
226__ATTR(_name, 0444, show_##_name##_old, NULL)
227
228define_one_ro_old(sampling_rate_min_old, sampling_rate_min);
229define_one_ro_old(sampling_rate_max_old, sampling_rate_max);
230
231/*** delete after deprecation time ***/
232
233static ssize_t store_sampling_down_factor(struct kobject *a,
234 struct attribute *b,
235 const char *buf, size_t count)
202{ 236{
203 unsigned int input; 237 unsigned int input;
204 int ret; 238 int ret;
@@ -214,8 +248,8 @@ static ssize_t store_sampling_down_factor(struct cpufreq_policy *unused,
214 return count; 248 return count;
215} 249}
216 250
217static ssize_t store_sampling_rate(struct cpufreq_policy *unused, 251static ssize_t store_sampling_rate(struct kobject *a, struct attribute *b,
218 const char *buf, size_t count) 252 const char *buf, size_t count)
219{ 253{
220 unsigned int input; 254 unsigned int input;
221 int ret; 255 int ret;
@@ -231,8 +265,8 @@ static ssize_t store_sampling_rate(struct cpufreq_policy *unused,
231 return count; 265 return count;
232} 266}
233 267
234static ssize_t store_up_threshold(struct cpufreq_policy *unused, 268static ssize_t store_up_threshold(struct kobject *a, struct attribute *b,
235 const char *buf, size_t count) 269 const char *buf, size_t count)
236{ 270{
237 unsigned int input; 271 unsigned int input;
238 int ret; 272 int ret;
@@ -251,8 +285,8 @@ static ssize_t store_up_threshold(struct cpufreq_policy *unused,
251 return count; 285 return count;
252} 286}
253 287
254static ssize_t store_down_threshold(struct cpufreq_policy *unused, 288static ssize_t store_down_threshold(struct kobject *a, struct attribute *b,
255 const char *buf, size_t count) 289 const char *buf, size_t count)
256{ 290{
257 unsigned int input; 291 unsigned int input;
258 int ret; 292 int ret;
@@ -272,8 +306,8 @@ static ssize_t store_down_threshold(struct cpufreq_policy *unused,
272 return count; 306 return count;
273} 307}
274 308
275static ssize_t store_ignore_nice_load(struct cpufreq_policy *policy, 309static ssize_t store_ignore_nice_load(struct kobject *a, struct attribute *b,
276 const char *buf, size_t count) 310 const char *buf, size_t count)
277{ 311{
278 unsigned int input; 312 unsigned int input;
279 int ret; 313 int ret;
@@ -308,8 +342,8 @@ static ssize_t store_ignore_nice_load(struct cpufreq_policy *policy,
308 return count; 342 return count;
309} 343}
310 344
311static ssize_t store_freq_step(struct cpufreq_policy *policy, 345static ssize_t store_freq_step(struct kobject *a, struct attribute *b,
312 const char *buf, size_t count) 346 const char *buf, size_t count)
313{ 347{
314 unsigned int input; 348 unsigned int input;
315 int ret; 349 int ret;
@@ -331,7 +365,7 @@ static ssize_t store_freq_step(struct cpufreq_policy *policy,
331} 365}
332 366
333#define define_one_rw(_name) \ 367#define define_one_rw(_name) \
334static struct freq_attr _name = \ 368static struct global_attr _name = \
335__ATTR(_name, 0644, show_##_name, store_##_name) 369__ATTR(_name, 0644, show_##_name, store_##_name)
336 370
337define_one_rw(sampling_rate); 371define_one_rw(sampling_rate);
@@ -358,6 +392,53 @@ static struct attribute_group dbs_attr_group = {
358 .name = "conservative", 392 .name = "conservative",
359}; 393};
360 394
395/*** delete after deprecation time ***/
396
397#define write_one_old(file_name) \
398static ssize_t store_##file_name##_old \
399(struct cpufreq_policy *unused, const char *buf, size_t count) \
400{ \
401 printk_once(KERN_INFO "CPUFREQ: Per core conservative sysfs " \
402 "interface is deprecated - " #file_name "\n"); \
403 return store_##file_name(NULL, NULL, buf, count); \
404}
405write_one_old(sampling_rate);
406write_one_old(sampling_down_factor);
407write_one_old(up_threshold);
408write_one_old(down_threshold);
409write_one_old(ignore_nice_load);
410write_one_old(freq_step);
411
412#define define_one_rw_old(object, _name) \
413static struct freq_attr object = \
414__ATTR(_name, 0644, show_##_name##_old, store_##_name##_old)
415
416define_one_rw_old(sampling_rate_old, sampling_rate);
417define_one_rw_old(sampling_down_factor_old, sampling_down_factor);
418define_one_rw_old(up_threshold_old, up_threshold);
419define_one_rw_old(down_threshold_old, down_threshold);
420define_one_rw_old(ignore_nice_load_old, ignore_nice_load);
421define_one_rw_old(freq_step_old, freq_step);
422
423static struct attribute *dbs_attributes_old[] = {
424 &sampling_rate_max_old.attr,
425 &sampling_rate_min_old.attr,
426 &sampling_rate_old.attr,
427 &sampling_down_factor_old.attr,
428 &up_threshold_old.attr,
429 &down_threshold_old.attr,
430 &ignore_nice_load_old.attr,
431 &freq_step_old.attr,
432 NULL
433};
434
435static struct attribute_group dbs_attr_group_old = {
436 .attrs = dbs_attributes_old,
437 .name = "conservative",
438};
439
440/*** delete after deprecation time ***/
441
361/************************** sysfs end ************************/ 442/************************** sysfs end ************************/
362 443
363static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info) 444static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info)
@@ -530,7 +611,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
530 611
531 mutex_lock(&dbs_mutex); 612 mutex_lock(&dbs_mutex);
532 613
533 rc = sysfs_create_group(&policy->kobj, &dbs_attr_group); 614 rc = sysfs_create_group(&policy->kobj, &dbs_attr_group_old);
534 if (rc) { 615 if (rc) {
535 mutex_unlock(&dbs_mutex); 616 mutex_unlock(&dbs_mutex);
536 return rc; 617 return rc;
@@ -564,6 +645,13 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
564 if (latency == 0) 645 if (latency == 0)
565 latency = 1; 646 latency = 1;
566 647
648 rc = sysfs_create_group(cpufreq_global_kobject,
649 &dbs_attr_group);
650 if (rc) {
651 mutex_unlock(&dbs_mutex);
652 return rc;
653 }
654
567 /* 655 /*
568 * conservative does not implement micro like ondemand 656 * conservative does not implement micro like ondemand
569 * governor, thus we are bound to jiffes/HZ 657 * governor, thus we are bound to jiffes/HZ
@@ -591,7 +679,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
591 dbs_timer_exit(this_dbs_info); 679 dbs_timer_exit(this_dbs_info);
592 680
593 mutex_lock(&dbs_mutex); 681 mutex_lock(&dbs_mutex);
594 sysfs_remove_group(&policy->kobj, &dbs_attr_group); 682 sysfs_remove_group(&policy->kobj, &dbs_attr_group_old);
595 dbs_enable--; 683 dbs_enable--;
596 mutex_destroy(&this_dbs_info->timer_mutex); 684 mutex_destroy(&this_dbs_info->timer_mutex);
597 685
@@ -605,6 +693,9 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
605 CPUFREQ_TRANSITION_NOTIFIER); 693 CPUFREQ_TRANSITION_NOTIFIER);
606 694
607 mutex_unlock(&dbs_mutex); 695 mutex_unlock(&dbs_mutex);
696 if (!dbs_enable)
697 sysfs_remove_group(cpufreq_global_kobject,
698 &dbs_attr_group);
608 699
609 break; 700 break;
610 701
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index 740ac3ad8fd0..8b668ead6d6e 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -295,6 +295,7 @@ static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
295void acpi_processor_ppc_init(void); 295void acpi_processor_ppc_init(void);
296void acpi_processor_ppc_exit(void); 296void acpi_processor_ppc_exit(void);
297int acpi_processor_ppc_has_changed(struct acpi_processor *pr); 297int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
298extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
298#else 299#else
299static inline void acpi_processor_ppc_init(void) 300static inline void acpi_processor_ppc_init(void)
300{ 301{
@@ -316,6 +317,11 @@ static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
316 } 317 }
317 return 0; 318 return 0;
318} 319}
320static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
321{
322 return -ENODEV;
323}
324
319#endif /* CONFIG_CPU_FREQ */ 325#endif /* CONFIG_CPU_FREQ */
320 326
321/* in processor_throttling.c */ 327/* in processor_throttling.c */
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 79a2340d83cd..4de02b10007f 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -232,6 +232,7 @@ struct cpufreq_driver {
232 /* optional */ 232 /* optional */
233 unsigned int (*getavg) (struct cpufreq_policy *policy, 233 unsigned int (*getavg) (struct cpufreq_policy *policy,
234 unsigned int cpu); 234 unsigned int cpu);
235 int (*bios_limit) (int cpu, unsigned int *limit);
235 236
236 int (*exit) (struct cpufreq_policy *policy); 237 int (*exit) (struct cpufreq_policy *policy);
237 int (*suspend) (struct cpufreq_policy *policy, pm_message_t pmsg); 238 int (*suspend) (struct cpufreq_policy *policy, pm_message_t pmsg);
generated by cgit v1.2.2 (git 2.25.0) at 2025-10-28 06:00:29 -0400