return 0;
}
-static struct dmi_system_id __initdata processor_power_dmi_table[] = {
- {set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,
- "IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,
- "1SET60WW")},
- (void *)1},
- {set_max_cstate, "Medion 41700", {
- DMI_MATCH(DMI_BIOS_VENDOR,
- "Phoenix Technologies LTD"),
- DMI_MATCH(DMI_BIOS_VERSION,
- "R01-A1J")}, (void *)1},
- {set_max_cstate, "Clevo 5600D", {
- DMI_MATCH(DMI_BIOS_VENDOR,
- "Phoenix Technologies LTD"),
- DMI_MATCH(DMI_BIOS_VERSION,
- "SHE845M0.86C.0013.D.0302131307")},
+/* Actually this shouldn't be __cpuinitdata, would be better to fix the
+ callers to only run once -AK */
+static struct dmi_system_id __cpuinitdata processor_power_dmi_table[] = {
+ { set_max_cstate, "IBM ThinkPad R40e", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
+ DMI_MATCH(DMI_BIOS_VERSION,"1SET60WW")}, (void *)1},
+ { set_max_cstate, "IBM ThinkPad R40e", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
+ DMI_MATCH(DMI_BIOS_VERSION,"1SET43WW") }, (void*)1},
+ { set_max_cstate, "IBM ThinkPad R40e", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
+ DMI_MATCH(DMI_BIOS_VERSION,"1SET45WW") }, (void*)1},
+ { set_max_cstate, "IBM ThinkPad R40e", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
+ DMI_MATCH(DMI_BIOS_VERSION,"1SET47WW") }, (void*)1},
+ { set_max_cstate, "IBM ThinkPad R40e", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
+ DMI_MATCH(DMI_BIOS_VERSION,"1SET50WW") }, (void*)1},
+ { set_max_cstate, "IBM ThinkPad R40e", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
+ DMI_MATCH(DMI_BIOS_VERSION,"1SET52WW") }, (void*)1},
+ { set_max_cstate, "IBM ThinkPad R40e", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
+ DMI_MATCH(DMI_BIOS_VERSION,"1SET55WW") }, (void*)1},
+ { set_max_cstate, "IBM ThinkPad R40e", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
+ DMI_MATCH(DMI_BIOS_VERSION,"1SET56WW") }, (void*)1},
+ { set_max_cstate, "IBM ThinkPad R40e", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
+ DMI_MATCH(DMI_BIOS_VERSION,"1SET59WW") }, (void*)1},
+ { set_max_cstate, "IBM ThinkPad R40e", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
+ DMI_MATCH(DMI_BIOS_VERSION,"1SET60WW") }, (void*)1},
+ { set_max_cstate, "IBM ThinkPad R40e", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
+ DMI_MATCH(DMI_BIOS_VERSION,"1SET61WW") }, (void*)1},
+ { set_max_cstate, "IBM ThinkPad R40e", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
+ DMI_MATCH(DMI_BIOS_VERSION,"1SET62WW") }, (void*)1},
+ { set_max_cstate, "IBM ThinkPad R40e", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
+ DMI_MATCH(DMI_BIOS_VERSION,"1SET64WW") }, (void*)1},
+ { set_max_cstate, "IBM ThinkPad R40e", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
+ DMI_MATCH(DMI_BIOS_VERSION,"1SET65WW") }, (void*)1},
+ { set_max_cstate, "IBM ThinkPad R40e", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
+ DMI_MATCH(DMI_BIOS_VERSION,"1SET68WW") }, (void*)1},
+ { set_max_cstate, "Medion 41700", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"Phoenix Technologies LTD"),
+ DMI_MATCH(DMI_BIOS_VERSION,"R01-A1J")}, (void *)1},
+ { set_max_cstate, "Clevo 5600D", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"Phoenix Technologies LTD"),
+ DMI_MATCH(DMI_BIOS_VERSION,"SHE845M0.86C.0013.D.0302131307")},
(void *)2},
{},
};
}
}
- cx->usage++;
-
#ifdef CONFIG_HOTPLUG_CPU
/*
* Check for P_LVL2_UP flag before entering C2 and above on
* detection phase, to work cleanly with logical CPU hotplug.
*/
if ((cx->type != ACPI_STATE_C1) && (num_online_cpus() > 1) &&
- !pr->flags.has_cst && acpi_fadt.plvl2_up)
- cx->type = ACPI_STATE_C1;
+ !pr->flags.has_cst && !acpi_fadt.plvl2_up)
+ cx = &pr->power.states[ACPI_STATE_C1];
#endif
+
+ cx->usage++;
+
/*
* Sleep:
* ------
smp_mb__after_clear_bit();
if (need_resched()) {
set_thread_flag(TIF_POLLING_NRFLAG);
+ local_irq_enable();
return;
}
}
next_state = pr->power.state;
+#ifdef CONFIG_HOTPLUG_CPU
+ /* Don't do promotion/demotion */
+ if ((cx->type == ACPI_STATE_C1) && (num_online_cpus() > 1) &&
+ !pr->flags.has_cst && !acpi_fadt.plvl2_up) {
+ next_state = cx;
+ goto end;
+ }
+#endif
+
/*
* Promotion?
* ----------
if (!pr->pblk)
return_VALUE(-ENODEV);
- memset(pr->power.states, 0, sizeof(pr->power.states));
-
/* if info is obtained from pblk/fadt, type equals state */
- pr->power.states[ACPI_STATE_C1].type = ACPI_STATE_C1;
pr->power.states[ACPI_STATE_C2].type = ACPI_STATE_C2;
pr->power.states[ACPI_STATE_C3].type = ACPI_STATE_C3;
- /* the C0 state only exists as a filler in our array,
- * and all processors need to support C1 */
- pr->power.states[ACPI_STATE_C0].valid = 1;
- pr->power.states[ACPI_STATE_C1].valid = 1;
-
#ifndef CONFIG_HOTPLUG_CPU
/*
* Check for P_LVL2_UP flag before entering C2 and above on
* an SMP system.
*/
- if ((num_online_cpus() > 1) && acpi_fadt.plvl2_up)
+ if ((num_online_cpus() > 1) && !acpi_fadt.plvl2_up)
return_VALUE(-ENODEV);
#endif
{
ACPI_FUNCTION_TRACE("acpi_processor_get_power_info_default_c1");
+ /* Zero initialize all the C-states info. */
memset(pr->power.states, 0, sizeof(pr->power.states));
- /* if info is obtained from pblk/fadt, type equals state */
+ /* set the first C-State to C1 */
pr->power.states[ACPI_STATE_C1].type = ACPI_STATE_C1;
- pr->power.states[ACPI_STATE_C2].type = ACPI_STATE_C2;
- pr->power.states[ACPI_STATE_C3].type = ACPI_STATE_C3;
/* the C0 state only exists as a filler in our array,
* and all processors need to support C1 */
{
acpi_status status = 0;
acpi_integer count;
+ int current_count;
int i;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *cst;
if (nocst)
return_VALUE(-ENODEV);
- pr->power.count = 0;
- for (i = 0; i < ACPI_PROCESSOR_MAX_POWER; i++)
- memset(&(pr->power.states[i]), 0,
- sizeof(struct acpi_processor_cx));
+ current_count = 1;
+
+ /* Zero initialize C2 onwards and prepare for fresh CST lookup */
+ for (i = 2; i < ACPI_PROCESSOR_MAX_POWER; i++)
+ memset(&(pr->power.states[i]), 0,
+ sizeof(struct acpi_processor_cx));
status = acpi_evaluate_object(pr->handle, "_CST", NULL, &buffer);
if (ACPI_FAILURE(status)) {
goto end;
}
- /* We support up to ACPI_PROCESSOR_MAX_POWER. */
- if (count > ACPI_PROCESSOR_MAX_POWER) {
- printk(KERN_WARNING
- "Limiting number of power states to max (%d)\n",
- ACPI_PROCESSOR_MAX_POWER);
- printk(KERN_WARNING
- "Please increase ACPI_PROCESSOR_MAX_POWER if needed.\n");
- count = ACPI_PROCESSOR_MAX_POWER;
- }
-
/* Tell driver that at least _CST is supported. */
pr->flags.has_cst = 1;
(reg->space_id != ACPI_ADR_SPACE_SYSTEM_IO))
continue;
- if ((cx.type < ACPI_STATE_C1) || (cx.type > ACPI_STATE_C3))
+ if ((cx.type < ACPI_STATE_C2) || (cx.type > ACPI_STATE_C3))
continue;
obj = (union acpi_object *)&(element->package.elements[2]);
cx.power = obj->integer.value;
- (pr->power.count)++;
- memcpy(&(pr->power.states[pr->power.count]), &cx, sizeof(cx));
+ current_count++;
+ memcpy(&(pr->power.states[current_count]), &cx, sizeof(cx));
+
+ /*
+ * We support total ACPI_PROCESSOR_MAX_POWER - 1
+ * (From 1 through ACPI_PROCESSOR_MAX_POWER - 1)
+ */
+ if (current_count >= (ACPI_PROCESSOR_MAX_POWER - 1)) {
+ printk(KERN_WARNING
+ "Limiting number of power states to max (%d)\n",
+ ACPI_PROCESSOR_MAX_POWER);
+ printk(KERN_WARNING
+ "Please increase ACPI_PROCESSOR_MAX_POWER if needed.\n");
+ break;
+ }
}
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d power states\n",
- pr->power.count));
+ current_count));
/* Validate number of power states discovered */
- if (pr->power.count < 2)
+ if (current_count < 2)
status = -EFAULT;
end:
{
unsigned int i;
unsigned int working = 0;
+ int timer_broadcast = 0;
+ cpumask_t mask = cpumask_of_cpu(pr->id);
+
+#ifdef ARCH_APICTIMER_STOPS_ON_C3
+ on_each_cpu(switch_ipi_to_APIC_timer, &mask, 1, 1);
+#endif
for (i = 1; i < ACPI_PROCESSOR_MAX_POWER; i++) {
struct acpi_processor_cx *cx = &pr->power.states[i];
case ACPI_STATE_C2:
acpi_processor_power_verify_c2(cx);
+#ifdef ARCH_APICTIMER_STOPS_ON_C3
+ /* Some AMD systems fake C3 as C2, but still
+ have timer troubles */
+ if (cx->valid &&
+ boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
+ timer_broadcast++;
+#endif
break;
case ACPI_STATE_C3:
acpi_processor_power_verify_c3(pr, cx);
+#ifdef ARCH_APICTIMER_STOPS_ON_C3
+ if (cx->valid)
+ timer_broadcast++;
+#endif
break;
}
working++;
}
+ if (timer_broadcast)
+ on_each_cpu(switch_APIC_timer_to_ipi, &mask, 1, 1);
+
return (working);
}
/* NOTE: the idle thread may not be running while calling
* this function */
+ /* Adding C1 state */
+ acpi_processor_get_power_info_default_c1(pr);
result = acpi_processor_get_power_info_cst(pr);
if (result == -ENODEV)
- result = acpi_processor_get_power_info_fadt(pr);
+ acpi_processor_get_power_info_fadt(pr);
- if ((result) || (acpi_processor_power_verify(pr) < 2))
- result = acpi_processor_get_power_info_default_c1(pr);
+ pr->power.count = acpi_processor_power_verify(pr);
/*
* Set Default Policy
}
}
- acpi_processor_power_init_pdc(&(pr->power), pr->id);
- acpi_processor_set_pdc(pr, pr->power.pdc);
acpi_processor_get_power_info(pr);
/*