intel_idle: support Haswell
Len Brown [Thu, 31 Jan 2013 19:40:49 +0000 (14:40 -0500)]
This patch enables intel_idle to run on the
next-generation Intel(R) Microarchitecture code named "Haswell".

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

drivers/idle/intel_idle.c

index b2cf489..fa71477 100644 (file)
@@ -212,6 +212,38 @@ static struct cpuidle_state ivb_cstates[MWAIT_MAX_NUM_CSTATES] = {
                .enter = &intel_idle },
 };
 
+static struct cpuidle_state hsw_cstates[MWAIT_MAX_NUM_CSTATES] = {
+       { /* MWAIT C0 */ },
+       { /* MWAIT C1 */
+               .name = "C1-HSW",
+               .desc = "MWAIT 0x00",
+               .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID,
+               .exit_latency = 2,
+               .target_residency = 2,
+               .enter = &intel_idle },
+       { /* MWAIT C2 */
+               .name = "C3-HSW",
+               .desc = "MWAIT 0x10",
+               .flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+               .exit_latency = 33,
+               .target_residency = 100,
+               .enter = &intel_idle },
+       { /* MWAIT C3 */
+               .name = "C6-HSW",
+               .desc = "MWAIT 0x20",
+               .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+               .exit_latency = 133,
+               .target_residency = 400,
+               .enter = &intel_idle },
+       { /* MWAIT C4 */
+               .name = "C7s-HSW",
+               .desc = "MWAIT 0x32",
+               .flags = MWAIT2flg(0x32) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+               .exit_latency = 166,
+               .target_residency = 500,
+               .enter = &intel_idle },
+};
+
 static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
        { /* MWAIT C0 */ },
        { /* MWAIT C1 */
@@ -365,6 +397,10 @@ static const struct idle_cpu idle_cpu_ivb = {
        .state_table = ivb_cstates,
 };
 
+static const struct idle_cpu idle_cpu_hsw = {
+       .state_table = hsw_cstates,
+};
+
 #define ICPU(model, cpu) \
        { X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&cpu }
 
@@ -382,6 +418,9 @@ static const struct x86_cpu_id intel_idle_ids[] = {
        ICPU(0x2d, idle_cpu_snb),
        ICPU(0x3a, idle_cpu_ivb),
        ICPU(0x3e, idle_cpu_ivb),
+       ICPU(0x3c, idle_cpu_hsw),
+       ICPU(0x3f, idle_cpu_hsw),
+       ICPU(0x45, idle_cpu_hsw),
        {}
 };
 MODULE_DEVICE_TABLE(x86cpu, intel_idle_ids);