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>

1 files changed, 37 insertions, 0 deletions

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index d0f59c3f87ef..a759a4c4bb0a 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -169,6 +169,38 @@ static struct cpuidle_state snb_cstates[MWAIT_MAX_NUM_CSTATES] = {
                 .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 @@ static const struct idle_cpu idle_cpu_snb = {
         .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 @@ static const struct x86_cpu_id intel_idle_ids[] = {
         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);