intel_idle: initial C8, C9, C10 support

Allow intel_idle and cpuidle to utilize C8, C9, C10
when they are present on...
"Fourth Generation Intel(R) Core(TM) Processors",
which are based on Intel(R) microarchitecture code name Haswell.

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

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 1a38dd7dfe4e56c9b749cac1e741fe4ad092024c..c7fbac39295259b71451751bc3fb2fffabe30c76 100644 (file)
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -273,6 +273,27 @@ static struct cpuidle_state hsw_cstates[CPUIDLE_STATE_MAX] = {
                .exit_latency = 166,
                .target_residency = 500,
                .enter = &intel_idle },
+       {
+               .name = "C8-HSW",
+               .desc = "MWAIT 0x40",
+               .flags = MWAIT2flg(0x40) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+               .exit_latency = 300,
+               .target_residency = 900,
+               .enter = &intel_idle },
+       {
+               .name = "C9-HSW",
+               .desc = "MWAIT 0x50",
+               .flags = MWAIT2flg(0x50) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+               .exit_latency = 600,
+               .target_residency = 1800,
+               .enter = &intel_idle },
+       {
+               .name = "C10-HSW",
+               .desc = "MWAIT 0x60",
+               .flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+               .exit_latency = 2600,
+               .target_residency = 7700,
+               .enter = &intel_idle },
        {
                .enter = NULL }
 };

diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index 480c14dc1ddd5936d48820739ae6847c6e0c52bb..309f7f596b4c21443da640dd85a8722372c33d27 100644 (file)
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -17,7 +17,7 @@
 #include <linux/completion.h>
 #include <linux/hrtimer.h>
 
-#define CPUIDLE_STATE_MAX      8
+#define CPUIDLE_STATE_MAX      10
 #define CPUIDLE_NAME_LEN       16
 #define CPUIDLE_DESC_LEN       32