From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755782AbbAOQgd (ORCPT ); Thu, 15 Jan 2015 11:36:33 -0500 Received: from mailapp01.imgtec.com ([195.59.15.196]:43137 "EHLO mailapp01.imgtec.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754692AbbAOQgc (ORCPT ); Thu, 15 Jan 2015 11:36:32 -0500 Message-ID: <54B7EC8D.5050505@imgtec.com> Date: Thu, 15 Jan 2015 16:36:29 +0000 From: Qais Yousef User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: James Hogan CC: Andrew Bresticker , Ralf Baechle , Thomas Gleixner , Jason Cooper , Jeffrey Deans , "Markos Chandras" , Paul Burton , Jonas Gorski , John Crispin , "David Daney" , , Subject: Re: [PATCH V2 18/24] irqchip: mips-gic: Stop using per-platform mapping tables References: <1411076851-28242-1-git-send-email-abrestic@chromium.org> <1411076851-28242-19-git-send-email-abrestic@chromium.org> <54B7AB95.4080501@imgtec.com> <54B7EAE6.8040503@imgtec.com> In-Reply-To: <54B7EAE6.8040503@imgtec.com> Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [192.168.154.94] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/15/2015 04:29 PM, James Hogan wrote: > On 15/01/15 11:59, James Hogan wrote: >> Hi Andrew, >> >> On 18/09/14 22:47, Andrew Bresticker wrote: >>> Now that the GIC properly uses IRQ domains, kill off the per-platform >>> routing tables that were used to make the GIC appear transparent. >>> >>> This includes: >>> - removing the mapping tables and the support for applying them, >>> - moving GIC IPI support to the GIC driver, >>> - properly routing the i8259 through the GIC on Malta, and >>> - updating IRQ assignments on SEAD-3 when the GIC is present. >>> >>> Platforms no longer will pass an interrupt mapping table to gic_init. >>> Instead, they will pass the CPU interrupt vector (2 - 7) that they >>> expect the GIC to route interrupts to. Note that in EIC mode this >>> value is ignored and all GIC interrupts are routed to EIC vector 1. >>> >>> Signed-off-by: Andrew Bresticker >>> Acked-by: Jason Cooper >>> Reviewed-by: Qais Yousef >>> Tested-by: Qais Yousef >> This commit (18743d2781d01d34d132f952a2e16353ccb4c3de) appears to break >> boot of interAptiv, dual core, dual vpe per core, on malta with >> malta_defconfig. >> >> It gets to here: >> ... >> CPU1 revision is: 0001a120 (MIPS interAptiv (multi)) >> FPU revision is: 0173a000 >> Primary instruction cache 64kB, VIPT, 4-way, linesize 32 bytes. >> Primary data cache 64kB, 4-way, PIPT, no aliases, linesize 32 bytes >> MIPS secondary cache 1024kB, 8-way, linesize 32 bytes. >> Synchronize counters for CPU 1: done. >> Brought up 2 CPUs >> >> and then appears to just hang. Passing nosmp works around it, allowing >> it to get to userland. >> >> Is that a problem you've already come across? >> >> I'll keep debugging. > Right, it appears the CPU IRQ line that the GIC is using doesn't get > unmasked (STATUSF_IP2) when a new VPE is brought up, so only the first > CPU will actually get any interrupts after your patch (including the > rather critical IPIs), i.e. hacking it in vsmp_init_secondary() in > smp-mt.c allows it to boot. > > Hmm, I'll have a think about what the most generic fix is, since > arbitrary stuff may or may not have registered handlers for the raw CPU > interrupts (timer, performance counter, gic etc)... > > Cheers > James > Is this similar to the issue addressed by this (ff1e29ade4c6 MIPS: smp-cps: Enable all hardware interrupts on secondary CPUs)? Qais