In order to better support future Intel processors, intel_pstate changes to use percentage values to tune P-states. The setpolicy driver interface is used to configure the intel_pstate internal policy. The __cpufreq_set_policy needs to be intercepted to use the setpolicy driver if it exists.
Signed-off-by: Wei Wang <wei.w.w...@intel.com> --- xen/drivers/cpufreq/utility.c | 3 +++ xen/include/acpi/cpufreq/cpufreq.h | 14 ++++++++++++++ 2 files changed, 17 insertions(+) changes in v5: 1) delay the addition of the structures that are used in later patches. diff --git a/xen/drivers/cpufreq/utility.c b/xen/drivers/cpufreq/utility.c index 519f862..53879fe 100644 --- a/xen/drivers/cpufreq/utility.c +++ b/xen/drivers/cpufreq/utility.c @@ -456,6 +456,9 @@ int __cpufreq_set_policy(struct cpufreq_policy *data, data->min = policy->min; data->max = policy->max; + data->limits = policy->limits; + if (cpufreq_driver->setpolicy) + return cpufreq_driver->setpolicy(data); if (policy->governor != data->governor) { /* save old, working values */ diff --git a/xen/include/acpi/cpufreq/cpufreq.h b/xen/include/acpi/cpufreq/cpufreq.h index f96c3e4..1ec04ca 100644 --- a/xen/include/acpi/cpufreq/cpufreq.h +++ b/xen/include/acpi/cpufreq/cpufreq.h @@ -41,6 +41,18 @@ struct cpufreq_cpuinfo { 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 @@ -52,6 +64,7 @@ struct cpufreq_policy { 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 @@ -145,6 +158,7 @@ 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, -- 1.9.1 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel