diff options
author | Len Brown <len.brown@intel.com> | 2010-07-23 20:04:46 (GMT) |
---|---|---|
committer | Len Brown <len.brown@intel.com> | 2010-07-23 20:04:46 (GMT) |
commit | 0394c6676e3fa48587fbe4821390d3264672c530 (patch) | |
tree | 68b4a83288aeeaacec0f94d8fe90ecedbc4fb2f3 /drivers | |
parent | c4236282e5921a410e8f074fec795b6ca0af36d5 (diff) | |
download | linux-fsl-qoriq-0394c6676e3fa48587fbe4821390d3264672c530.tar.xz |
intel_idle: delete power_policy modparam, and choose substate functions
The idea behind power policy was that it would start off as a modparam,
and then hook into the new "global" in-kernel power vs energy tunable.
But that tunable isn't happening, so delete the hook here.
With the policy hook gone, the sub-state choice functions
do not do anything useful, so delete them from the critical path.
To handle sub-states in the future, we will advertise them
with dedicated cpuidle_state entries. That is necessary
because some of the sub-states will have substantially different
properties than their peer sub-states.
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers')
-rwxr-xr-x | drivers/idle/intel_idle.c | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index 82c9a58..6d43bc3 100755 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -77,10 +77,8 @@ static struct cpuidle_driver intel_idle_driver = { }; /* intel_idle.max_cstate=0 disables driver */ static int max_cstate = MWAIT_MAX_NUM_CSTATES - 1; -static int power_policy = 7; /* 0 = max perf; 15 = max powersave */ static unsigned int mwait_substates; -static int (*choose_substate)(int); /* Reliable LAPIC Timer States, bit 1 for C1 etc. */ static unsigned int lapic_timer_reliable_states; @@ -168,42 +166,6 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = { .enter = NULL }, /* disabled */ }; -/* - * choose_tunable_substate() - * - * Run-time decision on which C-state substate to invoke - * If power_policy = 0, choose shallowest substate (0) - * If power_policy = 15, choose deepest substate - * If power_policy = middle, choose middle substate etc. - */ -static int choose_tunable_substate(int cstate) -{ - unsigned int num_substates; - unsigned int substate_choice; - - power_policy &= 0xF; /* valid range: 0-15 */ - cstate &= 7; /* valid range: 0-7 */ - - num_substates = (mwait_substates >> ((cstate) * 4)) - & MWAIT_SUBSTATE_MASK; - - if (num_substates <= 1) - return 0; - - substate_choice = ((power_policy + (power_policy + 1) * - (num_substates - 1)) / 16); - - return substate_choice; -} - -/* - * choose_zero_substate() - */ -static int choose_zero_substate(int cstate) -{ - return 0; -} - /** * intel_idle * @dev: cpuidle_device @@ -221,8 +183,6 @@ static int intel_idle(struct cpuidle_device *dev, struct cpuidle_state *state) cstate = (((eax) >> MWAIT_SUBSTATE_SIZE) & MWAIT_CSTATE_MASK) + 1; - eax = eax + (choose_substate)(cstate); - local_irq_disable(); if (!(lapic_timer_reliable_states & (1 << (cstate)))) @@ -301,13 +261,11 @@ static int intel_idle_probe(void) case 0x25: /* Westmere */ case 0x2C: /* Westmere */ cpuidle_state_table = nehalem_cstates; - choose_substate = choose_tunable_substate; break; case 0x1C: /* 28 - Atom Processor */ lapic_timer_reliable_states = (1 << 2) | (1 << 1); /* C2, C1 */ cpuidle_state_table = atom_cstates; - choose_substate = choose_zero_substate; break; #ifdef FUTURE_USE case 0x17: /* 23 - Core 2 Duo */ @@ -447,7 +405,6 @@ static void __exit intel_idle_exit(void) module_init(intel_idle_init); module_exit(intel_idle_exit); -module_param(power_policy, int, 0644); module_param(max_cstate, int, 0444); MODULE_AUTHOR("Len Brown <len.brown@intel.com>"); |