Groups > linux.kernel > #1470683 > unrolled thread

Re: [PATCH 0/3] Add SMP support for i.MX7D

Started by	Fabio Estevam <festevam@gmail.com>
First post	2016-08-26 14:50 +0200
Last post	2016-08-26 20:50 +0200
Articles	2 — 2 participants

Back to article view | Back to linux.kernel

This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by below is the oldest one visible, not the original post.

  Re: [PATCH 0/3] Add SMP support for i.MX7D Fabio Estevam <festevam@gmail.com> - 2016-08-26 14:50 +0200
    RE: [PATCH 0/3] Add SMP support for i.MX7D Yongcai Huang <anson.huang@nxp.com> - 2016-08-26 20:50 +0200

#1470683 — Re: [PATCH 0/3] Add SMP support for i.MX7D

From	Fabio Estevam <festevam@gmail.com>
Date	2016-08-26 14:50 +0200
Subject	Re: [PATCH 0/3] Add SMP support for i.MX7D
Message-ID	<saoK6-6YC-5@gated-at.bofh.it>

Hi Anson,

On Fri, Aug 26, 2016 at 8:12 AM, Anson Huang <Anson.Huang@nxp.com> wrote:
> i.MX7D has 2 Cortex-A7 ARM cores, and it has a different GPC design
> than i.MX6, so this patch set adds a new GPCV2 driver for i.MX7D,
> and also adds runtime check in SMP code to support both Cortex-A9
> and Cortex-A7 ARM cores.
>
> With this patch set, i.MX7D can boot up SMP kernel with 2 CPUs.

Currently mx7d can boot the 2 CPUs if you use PSCI in the bootloader.

Give mainline U-Boot a try and it will boot the 2 CPUs via PSCI.

There was an attempt to add gpcv2 support at:
https://patchwork.kernel.org/patch/6919831/

, and Shawn suggested to go to the PSCI approach.

PSCI for mx7 is still missing suspend support though.

Regards,

Fabio Estevam

[toc] | [next] | [standalone]

#1470942

From	Yongcai Huang <anson.huang@nxp.com>
Date	2016-08-26 20:50 +0200
Message-ID	<saumt-2ih-1@gated-at.bofh.it>
In reply to	#1470683


Best Regards!
Anson Huang



> -----Original Message-----
> From: Fabio Estevam [mailto:festevam@gmail.com]
> Sent: 2016-08-26 8:43 PM
> To: Yongcai Huang <anson.huang@nxp.com>
> Cc: linux-arm-kernel@lists.infradead.org; devicetree@vger.kernel.org; linux-
> kernel <linux-kernel@vger.kernel.org>; Mark Rutland
> <mark.rutland@arm.com>; Russell King - ARM Linux <linux@armlinux.org.uk>;
> robh+dt@kernel.org; Sascha Hauer <kernel@pengutronix.de>; Fabio Estevam
> <fabio.estevam@nxp.com>; Shawn Guo <shawnguo@kernel.org>
> Subject: Re: [PATCH 0/3] Add SMP support for i.MX7D
> 
> Hi Anson,
> 
> On Fri, Aug 26, 2016 at 8:12 AM, Anson Huang <Anson.Huang@nxp.com> wrote:
> > i.MX7D has 2 Cortex-A7 ARM cores, and it has a different GPC design
> > than i.MX6, so this patch set adds a new GPCV2 driver for i.MX7D, and
> > also adds runtime check in SMP code to support both Cortex-A9 and
> > Cortex-A7 ARM cores.
> >
> > With this patch set, i.MX7D can boot up SMP kernel with 2 CPUs.
> 
> Currently mx7d can boot the 2 CPUs if you use PSCI in the bootloader.
> 
> Give mainline U-Boot a try and it will boot the 2 CPUs via PSCI.
> 
> There was an attempt to add gpcv2 support at:
> https://patchwork.kernel.org/patch/6919831/
> 
> , and Shawn suggested to go to the PSCI approach.
> 
> PSCI for mx7 is still missing suspend support though.
> 
> Regards,
> 
> Fabio Estevam

Thanks Fabio for the info, OK, now that i.MX7D goes with PSCI, then please
Ignore this patch set, and I will add suspend support later. Please ignore this
Patch set.

For the suggestion of replace cpu_is_xxx with soc_is_xxx by Russell King, I will
Send another patch to improve that.

Anson.

[toc] | [prev] | [standalone]

csiph-web

Re: [PATCH 0/3] Add SMP support for i.MX7D

Contents

#1470683 — Re: [PATCH 0/3] Add SMP support for i.MX7D

#1470942