linux-kernel - Re: [linux-sunxi] [RFC 0/7] ARM: sun9i: SMP support with Multi-Cluster Power Management

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

Message-ID: <20150517143816.GJ4004@lukather>
Date:	Sun, 17 May 2015 16:38:16 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Ian Campbell <ijc@...lion.org.uk>
Cc:	wens@...e.org, Nicolas Pitre <nicolas.pitre@...aro.org>,
	Dave Martin <Dave.Martin@....com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-sunxi@...glegroups.com
Subject: Re: [linux-sunxi] [RFC 0/7] ARM: sun9i: SMP support with
 Multi-Cluster Power Management

Hi Ian,

On Sat, May 16, 2015 at 11:08:46AM +0100, Ian Campbell wrote:
> On Thu, 2015-05-14 at 14:10 +0800, Chen-Yu Tsai wrote:
> > This is my attempt to support SMP and CPU hot plugging on the Allwinner
> > A80 SoC. The A80 is a big.Little processor with 2 clusters of 4x Cortex-A7
> > and 4x Cortex-A15 cores.
> 
> I thought there was a preference these days to support this sort of
> thing via support PSCI in the firmware, which allows for other things
> such as non-secure-world etc.

Yes, it is the preferred way. Meaning that if someone wants to do that
work, he's very much welcome and encouraged to do so. But if no one's
doing it, then we still have to have a way to bringup the secondary
CPUs.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

Download attachment "signature.asc" of type "application/pgp-signature" (820 bytes)