Re: [Xen-devel] [PATCH 3/3] x86/mwait_idle: initial C8, C9, C10 support

["Nakajima, Jun" <jun.nakajima@xxxxxxxxx>]

On Thu, Aug 29, 2013 at 6:12 AM, Jan Beulich <JBeulich@xxxxxxxx> wrote:
> Allow mwait_idle 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@xxxxxxxxx>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>
> --- a/xen/arch/x86/cpu/mwait-idle.c
> +++ b/xen/arch/x86/cpu/mwait-idle.c
> @@ -252,6 +252,24 @@ static const struct cpuidle_state hsw_cs
>                 .exit_latency = 166,
>                 .target_residency = 500,
>         },
> +       {
> +               .name = "C8-HSW",
> +               .flags = MWAIT2flg(0x40) | CPUIDLE_FLAG_TLB_FLUSHED,
> +               .exit_latency = 300,
> +               .target_residency = 900,
> +       },
> +       {
> +               .name = "C9-HSW",
> +               .flags = MWAIT2flg(0x50) | CPUIDLE_FLAG_TLB_FLUSHED,
> +               .exit_latency = 600,
> +               .target_residency = 1800,
> +       },
> +       {
> +               .name = "C10-HSW",
> +               .flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,
> +               .exit_latency = 2600,
> +               .target_residency = 7700,
> +       },
>         {}
>  };
>
>
>
>

Acked-by: Jun Nakajima <jun.nakajima@xxxxxxxxx>


-- 
Jun
Intel Open Source Technology Center

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