diff options
author | Keir Fraser <keir.fraser@citrix.com> | 2010-04-09 08:52:43 +0100 |
---|---|---|
committer | Keir Fraser <keir.fraser@citrix.com> | 2010-04-09 08:52:43 +0100 |
commit | 002c5bcdbe112c70718ebc81ba95290210fa7f0d (patch) | |
tree | 79b6f996ecc5d1dd2d5f847acdf4525e4be768e2 /xen | |
parent | e136054cedf0b8d9395d35b8d3e5334eb514c47d (diff) | |
download | xen-002c5bcdbe112c70718ebc81ba95290210fa7f0d.tar.gz xen-002c5bcdbe112c70718ebc81ba95290210fa7f0d.tar.bz2 xen-002c5bcdbe112c70718ebc81ba95290210fa7f0d.zip |
Refactor Xen Support for Intel Turbo Boost
Refactor the existing code that supports the Intel Turbo feature to
move all the driver specific bits in the cpufreq driver. Create
a tri-state interface for the Turbo feature that can distinguish
amongst enabled Turbo, disabled Turbo, and processors that don't
support Turbo at all.
Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com>
Diffstat (limited to 'xen')
-rw-r--r-- | xen/arch/x86/acpi/cpufreq/cpufreq.c | 13 | ||||
-rw-r--r-- | xen/drivers/acpi/pmstat.c | 7 | ||||
-rw-r--r-- | xen/drivers/cpufreq/cpufreq_ondemand.c | 31 | ||||
-rw-r--r-- | xen/drivers/cpufreq/utility.c | 25 | ||||
-rw-r--r-- | xen/include/acpi/cpufreq/cpufreq.h | 14 | ||||
-rw-r--r-- | xen/include/acpi/cpufreq/processor_perf.h | 1 | ||||
-rw-r--r-- | xen/include/public/sysctl.h | 3 |
7 files changed, 53 insertions, 41 deletions
diff --git a/xen/arch/x86/acpi/cpufreq/cpufreq.c b/xen/arch/x86/acpi/cpufreq/cpufreq.c index 791cccd0d9..17776b4735 100644 --- a/xen/arch/x86/acpi/cpufreq/cpufreq.c +++ b/xen/arch/x86/acpi/cpufreq/cpufreq.c @@ -410,6 +410,10 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy, return -ENODEV; } + if (policy->turbo == CPUFREQ_TURBO_DISABLED) + if (target_freq > policy->cpuinfo.second_max_freq) + target_freq = policy->cpuinfo.second_max_freq; + perf = data->acpi_data; result = cpufreq_frequency_table_target(policy, data->freq_table, @@ -610,12 +614,19 @@ acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) break; } - /* Check for APERF/MPERF support in hardware */ + /* Check for APERF/MPERF support in hardware + * also check for boost support */ if (c->x86_vendor == X86_VENDOR_INTEL && c->cpuid_level >= 6) { unsigned int ecx; + unsigned int eax; ecx = cpuid_ecx(6); if (ecx & CPUID_6_ECX_APERFMPERF_CAPABILITY) acpi_cpufreq_driver.getavg = get_measured_perf; + eax = cpuid_eax(6); + if ( eax & 0x2 ) { + policy->turbo = CPUFREQ_TURBO_ENABLED; + printk(XENLOG_INFO "Turbo Mode detected and enabled!\n"); + } } /* diff --git a/xen/drivers/acpi/pmstat.c b/xen/drivers/acpi/pmstat.c index f152000489..c88d000f63 100644 --- a/xen/drivers/acpi/pmstat.c +++ b/xen/drivers/acpi/pmstat.c @@ -299,9 +299,8 @@ static int get_cpufreq_para(struct xen_sysctl_pm_op *op) &op->u.get_para.u.ondemand.sampling_rate_min, &op->u.get_para.u.ondemand.sampling_rate, &op->u.get_para.u.ondemand.up_threshold); - op->u.get_para.u.ondemand.turbo_enabled = - cpufreq_dbs_get_turbo_status(op->cpuid); } + op->u.get_para.turbo_enabled = cpufreq_get_turbo_status(op->cpuid); return ret; } @@ -553,13 +552,13 @@ int do_pm_op(struct xen_sysctl_pm_op *op) case XEN_SYSCTL_pm_op_enable_turbo: { - cpufreq_dbs_enable_turbo(op->cpuid); + cpufreq_enable_turbo(op->cpuid); break; } case XEN_SYSCTL_pm_op_disable_turbo: { - cpufreq_dbs_disable_turbo(op->cpuid); + cpufreq_disable_turbo(op->cpuid); break; } diff --git a/xen/drivers/cpufreq/cpufreq_ondemand.c b/xen/drivers/cpufreq/cpufreq_ondemand.c index 5728a8fbaf..dd4f6c45c1 100644 --- a/xen/drivers/cpufreq/cpufreq_ondemand.c +++ b/xen/drivers/cpufreq/cpufreq_ondemand.c @@ -58,9 +58,6 @@ static struct dbs_tuners { static struct timer dbs_timer[NR_CPUS]; -/* Turbo Mode */ -static int turbo_detected = 0; - int write_ondemand_sampling_rate(unsigned int sampling_rate) { if ( (sampling_rate > MAX_SAMPLING_RATE / MICROSECS(1)) || @@ -111,10 +108,6 @@ static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info) policy = this_dbs_info->cur_policy; max = policy->max; - if (turbo_detected && !this_dbs_info->turbo_enabled) { - if (max > policy->cpuinfo.second_max_freq) - max = policy->cpuinfo.second_max_freq; - } if (unlikely(policy->resume)) { __cpufreq_driver_target(policy, max,CPUFREQ_RELATION_H); @@ -276,7 +269,6 @@ int cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int event) } else dbs_tuners_ins.sampling_rate = usr_sampling_rate; } - this_dbs_info->turbo_enabled = 1; dbs_timer_init(this_dbs_info); break; @@ -353,13 +345,6 @@ struct cpufreq_governor cpufreq_gov_dbs = { static int __init cpufreq_gov_dbs_init(void) { -#ifdef CONFIG_X86 - unsigned int eax = cpuid_eax(6); - if ( eax & 0x2 ) { - turbo_detected = 1; - printk(XENLOG_INFO "Turbo Mode detected!\n"); - } -#endif return cpufreq_register_governor(&cpufreq_gov_dbs); } __initcall(cpufreq_gov_dbs_init); @@ -404,19 +389,3 @@ void cpufreq_dbs_timer_resume(void) } } } - -void cpufreq_dbs_enable_turbo(int cpuid) -{ - per_cpu(cpu_dbs_info, cpuid).turbo_enabled = 1; -} - -void cpufreq_dbs_disable_turbo(int cpuid) -{ - per_cpu(cpu_dbs_info, cpuid).turbo_enabled = 0; -} - -unsigned int cpufreq_dbs_get_turbo_status(int cpuid) -{ - return turbo_detected && per_cpu(cpu_dbs_info, cpuid).turbo_enabled; -} - diff --git a/xen/drivers/cpufreq/utility.c b/xen/drivers/cpufreq/utility.c index c730df951f..612f7e0919 100644 --- a/xen/drivers/cpufreq/utility.c +++ b/xen/drivers/cpufreq/utility.c @@ -394,6 +394,31 @@ int cpufreq_driver_getavg(unsigned int cpu, unsigned int flag) return policy->cur; } +void cpufreq_enable_turbo(int cpuid) +{ + struct cpufreq_policy *policy; + + policy = cpufreq_cpu_policy[cpuid]; + if (policy->turbo != CPUFREQ_TURBO_UNSUPPORTED) + policy->turbo = CPUFREQ_TURBO_ENABLED; +} + +void cpufreq_disable_turbo(int cpuid) +{ + struct cpufreq_policy *policy; + + policy = cpufreq_cpu_policy[cpuid]; + if (policy->turbo != CPUFREQ_TURBO_UNSUPPORTED) + policy->turbo = CPUFREQ_TURBO_DISABLED; +} + +int cpufreq_get_turbo_status(int cpuid) +{ + struct cpufreq_policy *policy; + + policy = cpufreq_cpu_policy[cpuid]; + return policy->turbo; +} /********************************************************************* * POLICY * diff --git a/xen/include/acpi/cpufreq/cpufreq.h b/xen/include/acpi/cpufreq/cpufreq.h index 4bdc74e0ac..53c9a0d314 100644 --- a/xen/include/acpi/cpufreq/cpufreq.h +++ b/xen/include/acpi/cpufreq/cpufreq.h @@ -55,6 +55,9 @@ struct cpufreq_policy { unsigned int resume; /* flag for cpufreq 1st run * S3 wakeup, hotplug cpu, etc */ + int turbo; /* tristate flag: 0 for unsupported + * -1 for disable, 1 for enabled + * See CPUFREQ_TURBO_* below for defines */ }; extern struct cpufreq_policy *cpufreq_cpu_policy[NR_CPUS]; @@ -114,6 +117,14 @@ extern int __cpufreq_driver_target(struct cpufreq_policy *policy, #define USR_GETAVG 2 extern int cpufreq_driver_getavg(unsigned int cpu, unsigned int flag); +#define CPUFREQ_TURBO_DISABLED -1 +#define CPUFREQ_TURBO_UNSUPPORTED 0 +#define CPUFREQ_TURBO_ENABLED 1 + +extern void cpufreq_enable_turbo(int cpuid); +extern void cpufreq_disable_turbo(int cpuid); +extern int cpufreq_get_turbo_status(int cpuid); + static __inline__ int __cpufreq_governor(struct cpufreq_policy *policy, unsigned int event) { @@ -241,7 +252,4 @@ int write_userspace_scaling_setspeed(unsigned int cpu, unsigned int freq); void cpufreq_dbs_timer_suspend(void); void cpufreq_dbs_timer_resume(void); -void cpufreq_dbs_enable_turbo(int cpuid); -void cpufreq_dbs_disable_turbo(int cpuid); -unsigned int cpufreq_dbs_get_turbo_status(int cpuid); #endif /* __XEN_CPUFREQ_PM_H__ */ diff --git a/xen/include/acpi/cpufreq/processor_perf.h b/xen/include/acpi/cpufreq/processor_perf.h index 72b55ead82..40b3a7103b 100644 --- a/xen/include/acpi/cpufreq/processor_perf.h +++ b/xen/include/acpi/cpufreq/processor_perf.h @@ -9,7 +9,6 @@ int get_cpu_id(u8); int powernow_cpufreq_init(void); unsigned int powernow_register_driver(void); - void cpufreq_residency_update(unsigned int, uint8_t); void cpufreq_statistic_update(unsigned int, uint8_t, uint8_t); int cpufreq_statistic_init(unsigned int); diff --git a/xen/include/public/sysctl.h b/xen/include/public/sysctl.h index eb9f1b8325..7255644286 100644 --- a/xen/include/public/sysctl.h +++ b/xen/include/public/sysctl.h @@ -283,7 +283,6 @@ struct xen_ondemand { uint32_t sampling_rate; uint32_t up_threshold; - uint32_t turbo_enabled; }; typedef struct xen_ondemand xen_ondemand_t; @@ -319,6 +318,8 @@ struct xen_get_cpufreq_para { struct xen_userspace userspace; struct xen_ondemand ondemand; } u; + + int32_t turbo_enabled; }; struct xen_set_cpufreq_gov { |