diff options
Diffstat (limited to 'drivers/idle/intel_idle.c')
| -rwxr-xr-x | drivers/idle/intel_idle.c | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index 54f0fb4cd5d..82c9a58b3ab 100755 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -79,7 +79,7 @@ static struct cpuidle_driver intel_idle_driver = { static int max_cstate = MWAIT_MAX_NUM_CSTATES - 1; static int power_policy = 7; /* 0 = max perf; 15 = max powersave */ -static unsigned int substates; +static unsigned int mwait_substates; static int (*choose_substate)(int); /* Reliable LAPIC Timer States, bit 1 for C1 etc. */ @@ -184,7 +184,8 @@ static int choose_tunable_substate(int cstate) power_policy &= 0xF; /* valid range: 0-15 */ cstate &= 7; /* valid range: 0-7 */ - num_substates = (substates >> ((cstate) * 4)) & MWAIT_SUBSTATE_MASK; + num_substates = (mwait_substates >> ((cstate) * 4)) + & MWAIT_SUBSTATE_MASK; if (num_substates <= 1) return 0; @@ -259,7 +260,7 @@ static int intel_idle(struct cpuidle_device *dev, struct cpuidle_state *state) */ static int intel_idle_probe(void) { - unsigned int eax, ebx, ecx, edx; + unsigned int eax, ebx, ecx; if (max_cstate == 0) { pr_debug(PREFIX "disabled\n"); @@ -275,17 +276,13 @@ static int intel_idle_probe(void) if (boot_cpu_data.cpuid_level < CPUID_MWAIT_LEAF) return -ENODEV; - cpuid(CPUID_MWAIT_LEAF, &eax, &ebx, &ecx, &edx); + cpuid(CPUID_MWAIT_LEAF, &eax, &ebx, &ecx, &mwait_substates); if (!(ecx & CPUID5_ECX_EXTENSIONS_SUPPORTED) || !(ecx & CPUID5_ECX_INTERRUPT_BREAK)) return -ENODEV; -#ifdef DEBUG - if (substates == 0) /* can over-ride via modparam */ -#endif - substates = edx; - pr_debug(PREFIX "MWAIT substates: 0x%x\n", substates); + pr_debug(PREFIX "MWAIT substates: 0x%x\n", mwait_substates); if (boot_cpu_has(X86_FEATURE_ARAT)) /* Always Reliable APIC Timer */ lapic_timer_reliable_states = 0xFFFFFFFF; @@ -376,7 +373,7 @@ static int intel_idle_cpuidle_devices_init(void) } /* does the state exist in CPUID.MWAIT? */ - num_substates = (substates >> ((cstate) * 4)) + num_substates = (mwait_substates >> ((cstate) * 4)) & MWAIT_SUBSTATE_MASK; if (num_substates == 0) continue; @@ -452,9 +449,6 @@ module_exit(intel_idle_exit); module_param(power_policy, int, 0644); module_param(max_cstate, int, 0444); -#ifdef DEBUG -module_param(substates, int, 0444); -#endif MODULE_AUTHOR("Len Brown <len.brown@intel.com>"); MODULE_DESCRIPTION("Cpuidle driver for Intel Hardware v" INTEL_IDLE_VERSION); |