commit 6edab08c24f9141d69cfa4683a0a027d86ab303e
author Len Brown <len.brown@intel.com> Fri Jun 01 19:45:32 2012 -0400
committer Len Brown <len.brown@intel.com> Tue Jun 05 15:39:11 2012 -0400
tree ab0482f3ea7288866c380e541b54b254bbb10b28
parent 76e10d158efb6d4516018846f60c2ab5501900bc

intel_idle: initial IVB support

From an OS point of view, IVB looks like SNB, but quicker.

Signed-off-by: Len Brown <len.brown@intel.com>

drivers/idle/intel_idle.c

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index d0f59c3..a759a4c 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -169,6 +169,38 @@
 		.enter = &intel_idle },
 };
 
+static struct cpuidle_state ivb_cstates[MWAIT_MAX_NUM_CSTATES] = {
+	{ /* MWAIT C0 */ },
+	{ /* MWAIT C1 */
+		.name = "C1-IVB",
+		.desc = "MWAIT 0x00",
+		.flags = CPUIDLE_FLAG_TIME_VALID,
+		.exit_latency = 1,
+		.target_residency = 1,
+		.enter = &intel_idle },
+	{ /* MWAIT C2 */
+		.name = "C3-IVB",
+		.desc = "MWAIT 0x10",
+		.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 59,
+		.target_residency = 156,
+		.enter = &intel_idle },
+	{ /* MWAIT C3 */
+		.name = "C6-IVB",
+		.desc = "MWAIT 0x20",
+		.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 80,
+		.target_residency = 300,
+		.enter = &intel_idle },
+	{ /* MWAIT C4 */
+		.name = "C7-IVB",
+		.desc = "MWAIT 0x30",
+		.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 87,
+		.target_residency = 300,
+		.enter = &intel_idle },
+};
+
 static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
 	{ /* MWAIT C0 */ },
 	{ /* MWAIT C1 */
@@ -347,6 +379,10 @@
 	.state_table = snb_cstates,
 };
 
+static const struct idle_cpu idle_cpu_ivb = {
+	.state_table = ivb_cstates,
+};
+
 #define ICPU(model, cpu) \
 	{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&cpu }
 
@@ -362,6 +398,7 @@
 	ICPU(0x2f, idle_cpu_nehalem),
 	ICPU(0x2a, idle_cpu_snb),
 	ICPU(0x2d, idle_cpu_snb),
+	ICPU(0x3a, idle_cpu_ivb),
 	{}
 };
 MODULE_DEVICE_TABLE(x86cpu, intel_idle_ids);