From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755711AbcB2P0X (ORCPT ); Mon, 29 Feb 2016 10:26:23 -0500 Received: from mail-wm0-f43.google.com ([74.125.82.43]:34508 "EHLO mail-wm0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751457AbcB2P0U (ORCPT ); Mon, 29 Feb 2016 10:26:20 -0500 Subject: Re: [RFC v4 07/14] msi: Add a new MSI_FLAG_IRQ_REMAPPING flag To: Thomas Gleixner References: <1456508154-2253-1-git-send-email-eric.auger@linaro.org> <1456508154-2253-8-git-send-email-eric.auger@linaro.org> Cc: eric.auger@st.com, robin.murphy@arm.com, alex.williamson@redhat.com, will.deacon@arm.com, joro@8bytes.org, jason@lakedaemon.net, marc.zyngier@arm.com, christoffer.dall@linaro.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, suravee.suthikulpanit@amd.com, patches@linaro.org, linux-kernel@vger.kernel.org, Manish.Jaggi@caviumnetworks.com, Bharat.Bhushan@freescale.com, pranav.sawargaonkar@gmail.com, p.fedin@samsung.com, iommu@lists.linux-foundation.org From: Eric Auger Message-ID: <56D462F3.1020206@linaro.org> Date: Mon, 29 Feb 2016 16:25:39 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 MIME-Version: 1.0 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 Hi Thomas, On 02/26/2016 07:06 PM, Thomas Gleixner wrote: > On Fri, 26 Feb 2016, Eric Auger wrote: > >> Let's introduce a new msi_domain_info flag value, MSI_FLAG_IRQ_REMAPPING >> meant to tell the domain supports IRQ REMAPPING, also known as Interrupt >> Translation Service. On Intel HW this capability is abstracted on IOMMU >> side while on ARM it is abstracted on MSI controller side. >> >> GICv3 ITS HW is the first HW advertising that feature. > > No. We add the flag, epxlain what it does and then in a second step add the > user _after_ all other preliminaries are implemented. Sure I will proceed that way. Best Regards Eric > > Thanks, > > tglx >