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Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6

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* 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6:
  intel_idle: do not use the LAPIC timer for ATOM C2
  intel_idle: add initial Sandy Bridge support
  acpi_idle: delete bogus data from cpuidle_state.power_usage
  intel_idle: delete bogus data from cpuidle_state.power_usage
  intel_idle: simplify test for leave_mm()
This commit is contained in:
Linus Torvalds 2010-10-26 17:28:07 -07:00
commit 27afe58fe6
2 changed files with 46 additions and 16 deletions
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1
drivers/acpi/processor_idle.c
View file

@ -1013,7 +1013,6 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr)
strncpy(state->desc, cx->desc, CPUIDLE_DESC_LEN);
state->exit_latency = cx->latency;
state->target_residency = cx->latency * latency_factor;
state->power_usage = cx->power;
state->flags = 0;
switch (cx->type) {

61
drivers/idle/intel_idle.c
View file

@ -74,7 +74,7 @@ static int max_cstate = MWAIT_MAX_NUM_CSTATES - 1;
static unsigned int mwait_substates;
/* Reliable LAPIC Timer States, bit 1 for C1 etc. */
static unsigned int lapic_timer_reliable_states;
static unsigned int lapic_timer_reliable_states = (1 << 1); /* Default to only C1 */
static struct cpuidle_device __percpu *intel_idle_cpuidle_devices;
static int intel_idle(struct cpuidle_device *dev, struct cpuidle_state *state);
@ -94,7 +94,6 @@ static struct cpuidle_state nehalem_cstates[MWAIT_MAX_NUM_CSTATES] = {
.driver_data = (void *) 0x00,
.flags = CPUIDLE_FLAG_TIME_VALID,
.exit_latency = 3,
.power_usage = 1000,
.target_residency = 6,
.enter = &intel_idle },
{ /* MWAIT C2 */
@ -103,7 +102,6 @@ static struct cpuidle_state nehalem_cstates[MWAIT_MAX_NUM_CSTATES] = {
.driver_data = (void *) 0x10,
.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 20,
.power_usage = 500,
.target_residency = 80,
.enter = &intel_idle },
{ /* MWAIT C3 */
@ -112,11 +110,46 @@ static struct cpuidle_state nehalem_cstates[MWAIT_MAX_NUM_CSTATES] = {
.driver_data = (void *) 0x20,
.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 200,
.power_usage = 350,
.target_residency = 800,
.enter = &intel_idle },
};
static struct cpuidle_state snb_cstates[MWAIT_MAX_NUM_CSTATES] = {
{ /* MWAIT C0 */ },
{ /* MWAIT C1 */
.name = "SNB-C1",
.desc = "MWAIT 0x00",
.driver_data = (void *) 0x00,
.flags = CPUIDLE_FLAG_TIME_VALID,
.exit_latency = 1,
.target_residency = 4,
.enter = &intel_idle },
{ /* MWAIT C2 */
.name = "SNB-C3",
.desc = "MWAIT 0x10",
.driver_data = (void *) 0x10,
.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 80,
.target_residency = 160,
.enter = &intel_idle },
{ /* MWAIT C3 */
.name = "SNB-C6",
.desc = "MWAIT 0x20",
.driver_data = (void *) 0x20,
.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 104,
.target_residency = 208,
.enter = &intel_idle },
{ /* MWAIT C4 */
.name = "SNB-C7",
.desc = "MWAIT 0x30",
.driver_data = (void *) 0x30,
.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 109,
.target_residency = 300,
.enter = &intel_idle },
};
static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
{ /* MWAIT C0 */ },
{ /* MWAIT C1 */
@ -125,7 +158,6 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
.driver_data = (void *) 0x00,
.flags = CPUIDLE_FLAG_TIME_VALID,
.exit_latency = 1,
.power_usage = 1000,
.target_residency = 4,
.enter = &intel_idle },
{ /* MWAIT C2 */
@ -134,7 +166,6 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
.driver_data = (void *) 0x10,
.flags = CPUIDLE_FLAG_TIME_VALID,
.exit_latency = 20,
.power_usage = 500,
.target_residency = 80,
.enter = &intel_idle },
{ /* MWAIT C3 */ },
@ -144,7 +175,6 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
.driver_data = (void *) 0x30,
.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 100,
.power_usage = 250,
.target_residency = 400,
.enter = &intel_idle },
{ /* MWAIT C5 */ },
@ -154,7 +184,6 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
.driver_data = (void *) 0x52,
.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 140,
.power_usage = 150,
.target_residency = 560,
.enter = &intel_idle },
};
@ -179,13 +208,10 @@ static int intel_idle(struct cpuidle_device *dev, struct cpuidle_state *state)
local_irq_disable();
/*
* If the state flag indicates that the TLB will be flushed or if this
* is the deepest c-state supported, do a voluntary leave mm to avoid
* costly and mostly unnecessary wakeups for flushing the user TLB's
* associated with the active mm.
* leave_mm() to avoid costly and often unnecessary wakeups
* for flushing the user TLB's associated with the active mm.
*/
if (state->flags & CPUIDLE_FLAG_TLB_FLUSHED ||
(&dev->states[dev->state_count - 1] == state))
if (state->flags & CPUIDLE_FLAG_TLB_FLUSHED)
leave_mm(cpu);
if (!(lapic_timer_reliable_states & (1 << (cstate))))
@ -269,9 +295,14 @@ static int intel_idle_probe(void)
case 0x1C: /* 28 - Atom Processor */
case 0x26: /* 38 - Lincroft Atom Processor */
lapic_timer_reliable_states = (1 << 2) | (1 << 1); /* C2, C1 */
lapic_timer_reliable_states = (1 << 1); /* C1 */
cpuidle_state_table = atom_cstates;
break;
case 0x2A: /* SNB */
case 0x2D: /* SNB Xeon */
cpuidle_state_table = snb_cstates;
break;
#ifdef FUTURE_USE
case 0x17: /* 23 - Core 2 Duo */
lapic_timer_reliable_states = (1 << 2) | (1 << 1); /* C2, C1 */