summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/cpu/cpufreq
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kernel/cpu/cpufreq')
-rw-r--r--arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c116
-rw-r--r--arch/x86/kernel/cpu/cpufreq/powernow-k8.c44
2 files changed, 46 insertions, 114 deletions
diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index ae9b503220c..7d5c3b0ea8d 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -33,7 +33,7 @@
#include <linux/cpufreq.h>
#include <linux/compiler.h>
#include <linux/dmi.h>
-#include <trace/power.h>
+#include <trace/events/power.h>
#include <linux/acpi.h>
#include <linux/io.h>
@@ -60,7 +60,6 @@ enum {
};
#define INTEL_MSR_RANGE (0xffff)
-#define CPUID_6_ECX_APERFMPERF_CAPABILITY (0x1)
struct acpi_cpufreq_data {
struct acpi_processor_performance *acpi_data;
@@ -71,13 +70,7 @@ struct acpi_cpufreq_data {
static DEFINE_PER_CPU(struct acpi_cpufreq_data *, drv_data);
-struct acpi_msr_data {
- u64 saved_aperf, saved_mperf;
-};
-
-static DEFINE_PER_CPU(struct acpi_msr_data, msr_data);
-
-DEFINE_TRACE(power_mark);
+static DEFINE_PER_CPU(struct aperfmperf, old_perf);
/* acpi_perf_data is a pointer to percpu data. */
static struct acpi_processor_performance *acpi_perf_data;
@@ -244,23 +237,12 @@ static u32 get_cur_val(const struct cpumask *mask)
return cmd.val;
}
-struct perf_pair {
- union {
- struct {
- u32 lo;
- u32 hi;
- } split;
- u64 whole;
- } aperf, mperf;
-};
-
/* Called via smp_call_function_single(), on the target CPU */
static void read_measured_perf_ctrs(void *_cur)
{
- struct perf_pair *cur = _cur;
+ struct aperfmperf *am = _cur;
- rdmsr(MSR_IA32_APERF, cur->aperf.split.lo, cur->aperf.split.hi);
- rdmsr(MSR_IA32_MPERF, cur->mperf.split.lo, cur->mperf.split.hi);
+ get_aperfmperf(am);
}
/*
@@ -279,63 +261,17 @@ static void read_measured_perf_ctrs(void *_cur)
static unsigned int get_measured_perf(struct cpufreq_policy *policy,
unsigned int cpu)
{
- struct perf_pair readin, cur;
- unsigned int perf_percent;
+ struct aperfmperf perf;
+ unsigned long ratio;
unsigned int retval;
- if (smp_call_function_single(cpu, read_measured_perf_ctrs, &readin, 1))
+ if (smp_call_function_single(cpu, read_measured_perf_ctrs, &perf, 1))
return 0;
- cur.aperf.whole = readin.aperf.whole -
- per_cpu(msr_data, cpu).saved_aperf;
- cur.mperf.whole = readin.mperf.whole -
- per_cpu(msr_data, cpu).saved_mperf;
- per_cpu(msr_data, cpu).saved_aperf = readin.aperf.whole;
- per_cpu(msr_data, cpu).saved_mperf = readin.mperf.whole;
-
-#ifdef __i386__
- /*
- * We dont want to do 64 bit divide with 32 bit kernel
- * Get an approximate value. Return failure in case we cannot get
- * an approximate value.
- */
- if (unlikely(cur.aperf.split.hi || cur.mperf.split.hi)) {
- int shift_count;
- u32 h;
-
- h = max_t(u32, cur.aperf.split.hi, cur.mperf.split.hi);
- shift_count = fls(h);
-
- cur.aperf.whole >>= shift_count;
- cur.mperf.whole >>= shift_count;
- }
-
- if (((unsigned long)(-1) / 100) < cur.aperf.split.lo) {
- int shift_count = 7;
- cur.aperf.split.lo >>= shift_count;
- cur.mperf.split.lo >>= shift_count;
- }
-
- if (cur.aperf.split.lo && cur.mperf.split.lo)
- perf_percent = (cur.aperf.split.lo * 100) / cur.mperf.split.lo;
- else
- perf_percent = 0;
-
-#else
- if (unlikely(((unsigned long)(-1) / 100) < cur.aperf.whole)) {
- int shift_count = 7;
- cur.aperf.whole >>= shift_count;
- cur.mperf.whole >>= shift_count;
- }
-
- if (cur.aperf.whole && cur.mperf.whole)
- perf_percent = (cur.aperf.whole * 100) / cur.mperf.whole;
- else
- perf_percent = 0;
-
-#endif
+ ratio = calc_aperfmperf_ratio(&per_cpu(old_perf, cpu), &perf);
+ per_cpu(old_perf, cpu) = perf;
- retval = (policy->cpuinfo.max_freq * perf_percent) / 100;
+ retval = (policy->cpuinfo.max_freq * ratio) >> APERFMPERF_SHIFT;
return retval;
}
@@ -394,7 +330,6 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
unsigned int next_perf_state = 0; /* Index into perf table */
unsigned int i;
int result = 0;
- struct power_trace it;
dprintk("acpi_cpufreq_target %d (%d)\n", target_freq, policy->cpu);
@@ -426,7 +361,7 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
}
}
- trace_power_mark(&it, POWER_PSTATE, next_perf_state);
+ trace_power_frequency(POWER_PSTATE, data->freq_table[next_state].frequency);
switch (data->cpu_feature) {
case SYSTEM_INTEL_MSR_CAPABLE:
@@ -588,6 +523,21 @@ static const struct dmi_system_id sw_any_bug_dmi_table[] = {
},
{ }
};
+
+static int acpi_cpufreq_blacklist(struct cpuinfo_x86 *c)
+{
+ /* http://www.intel.com/Assets/PDF/specupdate/314554.pdf
+ * AL30: A Machine Check Exception (MCE) Occurring during an
+ * Enhanced Intel SpeedStep Technology Ratio Change May Cause
+ * Both Processor Cores to Lock Up when HT is enabled*/
+ if (c->x86_vendor == X86_VENDOR_INTEL) {
+ if ((c->x86 == 15) &&
+ (c->x86_model == 6) &&
+ (c->x86_mask == 8) && smt_capable())
+ return -ENODEV;
+ }
+ return 0;
+}
#endif
static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
@@ -602,6 +552,12 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
dprintk("acpi_cpufreq_cpu_init\n");
+#ifdef CONFIG_SMP
+ result = acpi_cpufreq_blacklist(c);
+ if (result)
+ return result;
+#endif
+
data = kzalloc(sizeof(struct acpi_cpufreq_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
@@ -731,12 +687,8 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
acpi_processor_notify_smm(THIS_MODULE);
/* Check for APERF/MPERF support in hardware */
- if (c->x86_vendor == X86_VENDOR_INTEL && c->cpuid_level >= 6) {
- unsigned int ecx;
- ecx = cpuid_ecx(6);
- if (ecx & CPUID_6_ECX_APERFMPERF_CAPABILITY)
- acpi_cpufreq_driver.getavg = get_measured_perf;
- }
+ if (cpu_has(c, X86_FEATURE_APERFMPERF))
+ acpi_cpufreq_driver.getavg = get_measured_perf;
dprintk("CPU%u - ACPI performance management activated.\n", cpu);
for (i = 0; i < perf->state_count; i++)
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index 2a50ef89100..6394aa5c798 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -605,9 +605,10 @@ static int check_pst_table(struct powernow_k8_data *data, struct pst_s *pst,
return 0;
}
-static void invalidate_entry(struct powernow_k8_data *data, unsigned int entry)
+static void invalidate_entry(struct cpufreq_frequency_table *powernow_table,
+ unsigned int entry)
{
- data->powernow_table[entry].frequency = CPUFREQ_ENTRY_INVALID;
+ powernow_table[entry].frequency = CPUFREQ_ENTRY_INVALID;
}
static void print_basics(struct powernow_k8_data *data)
@@ -854,6 +855,10 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
goto err_out;
}
+ /* fill in data */
+ data->numps = data->acpi_data.state_count;
+ powernow_k8_acpi_pst_values(data, 0);
+
if (cpu_family == CPU_HW_PSTATE)
ret_val = fill_powernow_table_pstate(data, powernow_table);
else
@@ -866,11 +871,8 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
powernow_table[data->acpi_data.state_count].index = 0;
data->powernow_table = powernow_table;
- /* fill in data */
- data->numps = data->acpi_data.state_count;
if (cpumask_first(cpu_core_mask(data->cpu)) == data->cpu)
print_basics(data);
- powernow_k8_acpi_pst_values(data, 0);
/* notify BIOS that we exist */
acpi_processor_notify_smm(THIS_MODULE);
@@ -914,13 +916,13 @@ static int fill_powernow_table_pstate(struct powernow_k8_data *data,
"bad value %d.\n", i, index);
printk(KERN_ERR PFX "Please report to BIOS "
"manufacturer\n");
- invalidate_entry(data, i);
+ invalidate_entry(powernow_table, i);
continue;
}
rdmsr(MSR_PSTATE_DEF_BASE + index, lo, hi);
if (!(hi & HW_PSTATE_VALID_MASK)) {
dprintk("invalid pstate %d, ignoring\n", index);
- invalidate_entry(data, i);
+ invalidate_entry(powernow_table, i);
continue;
}
@@ -941,7 +943,6 @@ static int fill_powernow_table_fidvid(struct powernow_k8_data *data,
struct cpufreq_frequency_table *powernow_table)
{
int i;
- int cntlofreq = 0;
for (i = 0; i < data->acpi_data.state_count; i++) {
u32 fid;
@@ -970,7 +971,7 @@ static int fill_powernow_table_fidvid(struct powernow_k8_data *data,
/* verify frequency is OK */
if ((freq > (MAX_FREQ * 1000)) || (freq < (MIN_FREQ * 1000))) {
dprintk("invalid freq %u kHz, ignoring\n", freq);
- invalidate_entry(data, i);
+ invalidate_entry(powernow_table, i);
continue;
}
@@ -978,38 +979,17 @@ static int fill_powernow_table_fidvid(struct powernow_k8_data *data,
* BIOSs are using "off" to indicate invalid */
if (vid == VID_OFF) {
dprintk("invalid vid %u, ignoring\n", vid);
- invalidate_entry(data, i);
+ invalidate_entry(powernow_table, i);
continue;
}
- /* verify only 1 entry from the lo frequency table */
- if (fid < HI_FID_TABLE_BOTTOM) {
- if (cntlofreq) {
- /* if both entries are the same,
- * ignore this one ... */
- if ((freq != powernow_table[cntlofreq].frequency) ||
- (index != powernow_table[cntlofreq].index)) {
- printk(KERN_ERR PFX
- "Too many lo freq table "
- "entries\n");
- return 1;
- }
-
- dprintk("double low frequency table entry, "
- "ignoring it.\n");
- invalidate_entry(data, i);
- continue;
- } else
- cntlofreq = i;
- }
-
if (freq != (data->acpi_data.states[i].core_frequency * 1000)) {
printk(KERN_INFO PFX "invalid freq entries "
"%u kHz vs. %u kHz\n", freq,
(unsigned int)
(data->acpi_data.states[i].core_frequency
* 1000));
- invalidate_entry(data, i);
+ invalidate_entry(powernow_table, i);
continue;
}
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-27 01:42:15 +0000