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Commit 56b9aea3 authored by Len Brown's avatar Len Brown
Browse files

intel_idle: recognize ARAT on WSM-EX 



We erroneously ignored the Always Running APIC Timer on WSM-EX.
Move the check for ARAT down so that it can apply to any/all models.

Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent e8a7e48b

drivers/idle/intel_idle.c

+3 −9
Original line number Diff line number Diff line
@@ -273,8 +273,6 @@ static int intel_idle_probe(void) 


	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;



	if (boot_cpu_data.x86 != 6)	/* family 6 */

		return -ENODEV;
@@ -286,8 +284,6 @@ static int intel_idle_probe(void) 
	case 0x1F:	/* Core i7 and i5 Processor - Nehalem */

	case 0x2E:	/* Nehalem-EX Xeon */

	case 0x2F:	/* Westmere-EX Xeon */

		lapic_timer_reliable_states = (1 << 1);	 /* C1 */



	case 0x25:	/* Westmere */

	case 0x2C:	/* Westmere */

		cpuidle_state_table = nehalem_cstates;
@@ -295,7 +291,6 @@ static int intel_idle_probe(void) 


	case 0x1C:	/* 28 - Atom Processor */

	case 0x26:	/* 38 - Lincroft Atom Processor */

		lapic_timer_reliable_states = (1 << 1); /* C1 */

		cpuidle_state_table = atom_cstates;

		break;
@@ -303,10 +298,6 @@ static int intel_idle_probe(void) 
	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 */

#endif



	default:

		pr_debug(PREFIX "does not run on family %d model %d\n",
@@ -314,6 +305,9 @@ static int intel_idle_probe(void) 
		return -ENODEV;

	}



	if (boot_cpu_has(X86_FEATURE_ARAT))	/* Always Reliable APIC Timer */

		lapic_timer_reliable_states = 0xFFFFFFFF;



	pr_debug(PREFIX "v" INTEL_IDLE_VERSION

		" model 0x%X\n", boot_cpu_data.x86_model);