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ACPI: HW P-state coordination support

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Treat HW coordination as independent CPUs.
This enables per-cpu monintoring of P-states

http://bugzilla.kernel.org/show_bug.cgi?id=5737

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Venkatesh Pallipadi 2006-06-26 00:34:43 -04:00 committed by Len Brown
parent 3448097fcc
commit 46f18e3a28
4 changed files with 22 additions and 8 deletions
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8
arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
View File

@ -418,8 +418,14 @@ acpi_cpufreq_cpu_init (
goto err_free;
perf = data->acpi_data;
policy->cpus = perf->shared_cpu_map;
policy->shared_type = perf->shared_type;
/*
* Will let policy->cpus know about dependency only when software
* coordination is required.
*/
if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL ||
policy->shared_type == CPUFREQ_SHARED_TYPE_ANY)
policy->cpus = perf->shared_cpu_map;
if (cpu_has(c, X86_FEATURE_CONSTANT_TSC)) {
acpi_cpufreq_driver.flags |= CPUFREQ_CONST_LOOPS;

8
arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
View File

@ -399,8 +399,14 @@ static int centrino_cpu_init_acpi(struct cpufreq_policy *policy)
dprintk(PFX "obtaining ACPI data failed\n");
return -EIO;
}
policy->cpus = p->shared_cpu_map;
policy->shared_type = p->shared_type;
/*
* Will let policy->cpus know about dependency only when software
* coordination is required.
*/
if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL ||
policy->shared_type == CPUFREQ_SHARED_TYPE_ANY)
policy->cpus = p->shared_cpu_map;
/* verify the acpi_data */
if (p->state_count <= 1) {

8
drivers/acpi/processor_perflib.c
View File

@ -698,12 +698,12 @@ int acpi_processor_preregister_performance(
/* Validate the Domain info */
count_target = pdomain->num_processors;
count = 1;
if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ALL ||
pdomain->coord_type == DOMAIN_COORD_TYPE_HW_ALL) {
if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ALL)
pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ALL;
} else if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ANY) {
else if (pdomain->coord_type == DOMAIN_COORD_TYPE_HW_ALL)
pr->performance->shared_type = CPUFREQ_SHARED_TYPE_HW;
else if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ANY)
pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ANY;
}
for_each_possible_cpu(j) {
if (i == j)

6
include/linux/cpufreq.h
View File

@ -100,8 +100,10 @@ struct cpufreq_policy {
#define CPUFREQ_INCOMPATIBLE (1)
#define CPUFREQ_NOTIFY (2)
#define CPUFREQ_SHARED_TYPE_ALL (0) /* All dependent CPUs should set freq */
#define CPUFREQ_SHARED_TYPE_ANY (1) /* Freq can be set from any dependent CPU */
#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 *******************/