From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751433AbbJGHMM (ORCPT ); Wed, 7 Oct 2015 03:12:12 -0400 Received: from foss.arm.com ([217.140.101.70]:56073 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751260AbbJGHMK (ORCPT ); Wed, 7 Oct 2015 03:12:10 -0400 Message-ID: <5614C5C6.5090207@arm.com> Date: Wed, 07 Oct 2015 08:12:06 +0100 From: Marc Zyngier Organization: ARM Ltd User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.7.0 MIME-Version: 1.0 To: Duc Dang , Suravee Suthikulpanit , Jason Cooper , Thomas Gleixner CC: linux-kernel@vger.kernel.org, linux-arm , patches@apm.com Subject: Re: [PATCH v2 1/1] irqchip/GICv2m: Add workaround for APM X-Gene GICv2m erratum References: <20151003142650.16b291b4@arm.com> In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/10/15 23:32, Duc Dang wrote: > APM X-Gene GICv2m implementation has an erratum where the > MSI data needs to be the offset from the spi_start in order to > trigger the correct MSI interrupt. This is different from the > standard GICv2m implementation where the MSI data is the absolute > value within the range from spi_start to (spi_start + num_spis) > of each v2m frame. > > This patch reads MSI_IIDR register (present in all GICv2m > implementations) to identify X-Gene GICv2m implementation and > apply workaround to change the data portion of MSI vector. > > Signed-off-by: Duc Dang Reviewed-by: Marc Zyngier M. -- Jazz is not dead. It just smells funny...