> From: Len Brown <len.brown@xxxxxxxxx>
>
> 3.12-stable review patch. If anyone has any objections, please let me know.
>
> ===============
>
> commit fab04b2208dd1d4121319f0096c5a5f4b70abc54 upstream.
>
> Support the "Intel(R) Atom(TM) Processor C2000 Product Family",
> formerly code-named Avoton. It is based on the next generation
> Intel Atom processor architecture, formerly code-named Silvermont.
>
> Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
> ---
> drivers/idle/intel_idle.c | 24 +++++++++++++++++++++++-
> 1 file changed, 23 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
> index d47bb0f267f7..000d370519d9 100644
> --- a/drivers/idle/intel_idle.c
> +++ b/drivers/idle/intel_idle.c
> @@ -1,7 +1,7 @@
> /*
> * intel_idle.c - native hardware idle loop for modern Intel processors
> *
> - * Copyright (c) 2010, Intel Corporation.
> + * Copyright (c) 2013, Intel Corporation.
> * Len Brown <len.brown@xxxxxxxxx>
> *
> * This program is free software; you can redistribute it and/or modify it
> @@ -329,6 +329,22 @@ static struct cpuidle_state atom_cstates[CPUIDLE_STATE_MAX] = {
> {
> .enter = NULL }
> };
> +static struct cpuidle_state avn_cstates[CPUIDLE_STATE_MAX] = {
> + {
> + .name = "C1-AVN",
> + .desc = "MWAIT 0x00",
> + .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID,
> + .exit_latency = 2,
> + .target_residency = 2,
> + .enter = &intel_idle },
> + {
> + .name = "C6-AVN",
> + .desc = "MWAIT 0x51",
> + .flags = MWAIT2flg(0x58) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
> + .exit_latency = 15,
> + .target_residency = 45,
> + .enter = &intel_idle },
> +};
>
> /**
> * intel_idle
> @@ -465,6 +481,11 @@ static const struct idle_cpu idle_cpu_hsw = {
> .disable_promotion_to_c1e = true,
> };
>
> +static const struct idle_cpu idle_cpu_avn = {
> + .state_table = avn_cstates,
> + .disable_promotion_to_c1e = true,
> +};
> +
> #define ICPU(model, cpu) \
> { X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&cpu }
>
> @@ -486,6 +507,7 @@ static const struct x86_cpu_id intel_idle_ids[] = {
> ICPU(0x3f, idle_cpu_hsw),
> ICPU(0x45, idle_cpu_hsw),
> ICPU(0x46, idle_cpu_hsw),
> + ICPU(0x4D, idle_cpu_avn),
> {}
> };
> MODULE_DEVICE_TABLE(x86cpu, intel_idle_ids);
Ahoj !
For this one you also need the upstream patch
22e580d07f6529a395c129575127ea6d860aed3a to make the C-States work on
C2000 series.
Arne
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