From mboxrd@z Thu Jan 1 00:00:00 1970 From: tony@atomide.com (Tony Lindgren) Date: Thu, 25 May 2017 08:11:03 -0700 Subject: [CFT] Always enable SMP mode on MP capable CPUs In-Reply-To: <20170525144800.GV23750@n2100.armlinux.org.uk> References: <20170518105209.GN22219@n2100.armlinux.org.uk> <20170519171526.GW22219@n2100.armlinux.org.uk> <20170524153847.GY10472@atomide.com> <20170525144800.GV23750@n2100.armlinux.org.uk> Message-ID: <20170525151103.GC10472@atomide.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org * Russell King - ARM Linux [170525 07:51]: > On Wed, May 24, 2017 at 08:38:47AM -0700, Tony Lindgren wrote: > > * Russell King - ARM Linux [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