linux-kernel - Re: [PATCH] intel_idle: Add CPU model 54 (Atom N2000 series)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <CAJvTdK=4+fDpPCzy16gch+21JH_t-icixehEkdz_wJBSvrZFXw@mail.gmail.com>
Date:	Thu, 27 Feb 2014 22:44:03 -0500
From:	Len Brown <lenb@...nel.org>
To:	Jan Kiszka <jan.kiszka@....de>
Cc:	Linux PM list <linux-pm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] intel_idle: Add CPU model 54 (Atom N2000 series)

Applied.

Note that the difference that will be noticed most will be that ACPI
on this kind of box typically offers the deepest C-state only when
on DC, and disables it on DC.  intel_idle offers it no matter
if the box is on AC or DC.

thanks,
-Len Brown, Intel Open Source Technology Center


On Sat, Jan 25, 2014 at 4:24 PM, Jan Kiszka <jan.kiszka@....de> wrote:
> From: Jan Kiszka <jan.kiszka@...mens.com>
>
> Add CPU ID for Atom N2600/N2800 processors. Datasheets indicate support
> for this, detailed information about potential quirks or limitations are
> missing, though. So we just reuse the definition for the previous ATOM
> series. Tests on N2800 systems showed that this addition is fine an can
> reduce power consumption by about 0.25 W (personally confirmed on Intel
> DN2800MT).
>
> Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
> ---
>  drivers/idle/intel_idle.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
> index 797ed29..6467fc9 100644
> --- a/drivers/idle/intel_idle.c
> +++ b/drivers/idle/intel_idle.c
> @@ -503,6 +503,7 @@ static const struct x86_cpu_id intel_idle_ids[] = {
>         ICPU(0x2f, idle_cpu_nehalem),
>         ICPU(0x2a, idle_cpu_snb),
>         ICPU(0x2d, idle_cpu_snb),
> +       ICPU(0x36, idle_cpu_atom),
>         ICPU(0x3a, idle_cpu_ivb),
>         ICPU(0x3e, idle_cpu_ivb),
>         ICPU(0x3c, idle_cpu_hsw),
>
>



-- 
Len Brown, Intel Open Source Technology Center
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/