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From: Tony Lindgren <tony@atomide.com>
To: Russell King - ARM Linux <linux@armlinux.org.uk>
Cc: afzal mohammed <afzal.mohd.ma@gmail.com>,
	linux-omap@vger.kernel.org, Fabio Estevam <festevam@gmail.com>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>,
	Kevin Hilman <khilman@kernel.org>
Subject: Re: [CFT] Always enable SMP mode on MP capable CPUs
Date: Thu, 25 May 2017 08:11:03 -0700	[thread overview]
Message-ID: <20170525151103.GC10472@atomide.com> (raw)
In-Reply-To: <20170525144800.GV23750@n2100.armlinux.org.uk>

* Russell King - ARM Linux <linux@armlinux.org.uk> [170525 07:51]:
> On Wed, May 24, 2017 at 08:38:47AM -0700, Tony Lindgren wrote:
> > * Russell King - ARM Linux <linux@armlinux.org.uk> [170519 10:19]:
> > > We could expand the table to positively identify the SMP capable CPUs
> > > and enable the SMP bit there, but it's going to add a lot of entries
> > > there (one for each specific ARMv7 MP CPU) and is going to have to be
> > > endlessly added to each time a new SMP CPU comes out.
> > 
> > Looks like commit e414690faa81 ("ARM: always enable SMP mode on SMP cores")
> > causes booting to fail early at least on omap4430 duovero. It's a bit of
> > a mystery as it is SMP.. And pandboard es (4460) and droid 4 (4430) work
> > without the conditional write..
> > 
> > Partial revert like below seems to make it boot again.
> 
> Thanks for testing, I'll integrate your change, and it should be in
> tonight's linux-next.

OK. That may not work on am437x though as it's UP.

Afzal, did the change that I posted work for you?

Regards,

Tony

WARNING: multiple messages have this Message-ID (diff)
From: tony@atomide.com (Tony Lindgren)
To: linux-arm-kernel@lists.infradead.org
Subject: [CFT] Always enable SMP mode on MP capable CPUs
Date: Thu, 25 May 2017 08:11:03 -0700	[thread overview]
Message-ID: <20170525151103.GC10472@atomide.com> (raw)
In-Reply-To: <20170525144800.GV23750@n2100.armlinux.org.uk>

* Russell King - ARM Linux <linux@armlinux.org.uk> [170525 07:51]:
> On Wed, May 24, 2017 at 08:38:47AM -0700, Tony Lindgren wrote:
> > * Russell King - ARM Linux <linux@armlinux.org.uk> [170519 10:19]:
> > > We could expand the table to positively identify the SMP capable CPUs
> > > and enable the SMP bit there, but it's going to add a lot of entries
> > > there (one for each specific ARMv7 MP CPU) and is going to have to be
> > > endlessly added to each time a new SMP CPU comes out.
> > 
> > Looks like commit e414690faa81 ("ARM: always enable SMP mode on SMP cores")
> > causes booting to fail early at least on omap4430 duovero. It's a bit of
> > a mystery as it is SMP.. And pandboard es (4460) and droid 4 (4430) work
> > without the conditional write..
> > 
> > Partial revert like below seems to make it boot again.
> 
> Thanks for testing, I'll integrate your change, and it should be in
> tonight's linux-next.

OK. That may not work on am437x though as it's UP.

Afzal, did the change that I posted work for you?

Regards,

Tony

  reply	other threads:[~2017-05-25 15:11 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-05-18 10:52 [CFT] Always enable SMP mode on MP capable CPUs Russell King - ARM Linux
2017-05-18 18:09 ` Fabio Estevam
2017-05-19 17:07   ` Fabio Estevam
2017-05-19 17:15     ` Russell King - ARM Linux
2017-05-24 15:38       ` Tony Lindgren
2017-05-24 15:38         ` Tony Lindgren
2017-05-25 14:48         ` Russell King - ARM Linux
2017-05-25 14:48           ` Russell King - ARM Linux
2017-05-25 15:11           ` Tony Lindgren [this message]
2017-05-25 15:11             ` Tony Lindgren
2017-05-25 18:05             ` Russell King - ARM Linux
2017-05-25 18:05               ` Russell King - ARM Linux
2017-05-25 22:13               ` Tony Lindgren
2017-05-25 22:13                 ` Tony Lindgren
2017-05-26 11:22                 ` afzal mohammed
2017-05-26 11:22                   ` afzal mohammed
2017-05-27 13:22                   ` Russell King - ARM Linux
2017-05-27 13:22                     ` Russell King - ARM Linux
2017-05-31 14:39                     ` Tony Lindgren
2017-05-31 14:39                       ` Tony Lindgren
2017-05-31 14:59                       ` Russell King - ARM Linux
2017-05-31 14:59                         ` Russell King - ARM Linux
2017-05-31 15:07                         ` Tony Lindgren
2017-05-31 15:07                           ` Tony Lindgren
2017-05-24 15:50 ` afzal mohammed
2017-05-24 15:50   ` afzal mohammed
2017-05-25 16:15 ` Florian Fainelli
2017-05-25 16:56   ` Russell King - ARM Linux
2017-05-25 17:10     ` Tony Lindgren
2017-05-25 17:10       ` Tony Lindgren
2017-05-25 17:24     ` Florian Fainelli
2017-05-26  9:44 ` Vladimir Murzin

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