Messages in this thread Patch in this message | | | From | Len Brown <> | Subject | [PATCH 4/4] intel_idle: initial HSW support | Date | Thu, 31 Jan 2013 23:11:36 -0500 |
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From: Len Brown <len.brown@intel.com>
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 | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+)
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index 8331753..85d50a1 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -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 = MWAIT_EAX_2_flags(0x00) | CPUIDLE_FLAG_TIME_VALID, + .exit_latency = 2, + .target_residency = 2, + .enter = &intel_idle }, + { /* MWAIT C2 */ + .name = "C3-HSW", + .desc = "MWAIT 0x10", + .flags = MWAIT_EAX_2_flags(0x10) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 39, + .target_residency = 117, + .enter = &intel_idle }, + { /* MWAIT C3 */ + .name = "C6-HSW", + .desc = "MWAIT 0x20", + .flags = MWAIT_EAX_2_flags(0x20) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 55, + .target_residency = 165, + .enter = &intel_idle }, + { /* MWAIT C4 */ + .name = "C7-HSW", + .desc = "MWAIT 0x30", + .flags = MWAIT_EAX_2_flags(0x32) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 79, + .target_residency = 237, + .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); -- 1.8.1.2.422.g08c0e7f
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