From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5C2E2C47257 for ; Mon, 4 May 2020 12:14:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 39105206A5 for ; Mon, 4 May 2020 12:14:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ziepe.ca header.i=@ziepe.ca header.b="nG7On+yM" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728713AbgEDMOG (ORCPT ); Mon, 4 May 2020 08:14:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59140 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1728638AbgEDMOE (ORCPT ); Mon, 4 May 2020 08:14:04 -0400 Received: from mail-qk1-x743.google.com (mail-qk1-x743.google.com [IPv6:2607:f8b0:4864:20::743]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 02727C061A41 for ; Mon, 4 May 2020 05:14:03 -0700 (PDT) Received: by mail-qk1-x743.google.com with SMTP id i14so4992337qka.10 for ; Mon, 04 May 2020 05:14:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=uYct+1EXK4RvBhS2R9oCZJOA6YnnY92fxMdH3FTHSR4=; b=nG7On+yMwtfGBMG3EEnGP/Eyr+dDKC4jICpKbPO6K4fszentgI/sW7dpsCMmC3kiqN r05PiNpFvfalngk5g8x2kENDR3bKi+zfFry4JRXeKkoS3rM3hNXK/XEdpT8Eq/owHSGW UdGPVNu1ZZE1RFEa4aePGP7JUhSU9acIvXIAgsAUBkHPimnV3tZu8BatePbjTXLAgV7+ 9j2xKqJiFFEFoCV0uizdmuOa8BXz0tOnGSMScdbrYZl1Tgqm2W/ItGaqMvd7WKHjuPUD CVJsX/sNmyL9+anfWB63V5O4sThGrMWEzqEkdprm3ZBcuTYZytOlWIPSHHZERyGUDr5J kOZg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=uYct+1EXK4RvBhS2R9oCZJOA6YnnY92fxMdH3FTHSR4=; b=nza4+pBmwG1TykM/tOC/dAzQW21TUEutzcwlVczJOI3DvA9LuRWP5JVabNht+vbyb1 /Iqp/xRrGw6gRwzGrOqMWD65WMq5x6X4+IrlNerZ5dk4nayb9UMTWyYc0yel3c4xI+fG h53UZHjw8G+O0dlQYFx1Lix5iUoP6wtxG5z/6KblhWEZoQIDw7pUkzH7qlXtPGaoHOsG dlb90QZzzEDdU5bsZ9bxHCek+Sj1Klcknd830XrU0wGWQtf2AfAXBDNZ+5J/+eehP3zP WSRqUXs8u0uln3cWeg8VucqR0rbQT5SjcUxLxRi14k1BmCvguBOli6/isasGNhXvL2Li 69ZQ== X-Gm-Message-State: AGi0PubHiu4K35Qj1LYSdj7dPWMGtHmG3a/dbO8EVa02/wHZ/VGWzQdc kdbajmTtki6GxyF4u5GxzatHwQ== X-Google-Smtp-Source: APiQypJo409ZJxzf2nxC+vnBmVCvb7bUK735uBejgyjN4EXp0iDnDYCtO3gUOEBm4tnsvWXbjqQYtA== X-Received: by 2002:a37:5941:: with SMTP id n62mr15543383qkb.419.1588594442936; Mon, 04 May 2020 05:14:02 -0700 (PDT) Received: from ziepe.ca (hlfxns017vw-142-68-57-212.dhcp-dynamic.fibreop.ns.bellaliant.net. [142.68.57.212]) by smtp.gmail.com with ESMTPSA id a139sm5077890qkg.107.2020.05.04.05.14.02 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Mon, 04 May 2020 05:14:02 -0700 (PDT) Received: from jgg by mlx.ziepe.ca with local (Exim 4.90_1) (envelope-from ) id 1jVZyz-0005Zd-K8; Mon, 04 May 2020 09:14:01 -0300 Date: Mon, 4 May 2020 09:14:01 -0300 From: Jason Gunthorpe To: "Dey, Megha" Cc: Dave Jiang , vkoul@kernel.org, maz@kernel.org, bhelgaas@google.com, rafael@kernel.org, gregkh@linuxfoundation.org, tglx@linutronix.de, hpa@zytor.com, alex.williamson@redhat.com, jacob.jun.pan@intel.com, ashok.raj@intel.com, yi.l.liu@intel.com, baolu.lu@intel.com, kevin.tian@intel.com, sanjay.k.kumar@intel.com, tony.luck@intel.com, jing.lin@intel.com, dan.j.williams@intel.com, kwankhede@nvidia.com, eric.auger@redhat.com, parav@mellanox.com, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org Subject: Re: [PATCH RFC 04/15] drivers/base: Add support for a new IMS irq domain Message-ID: <20200504121401.GV26002@ziepe.ca> References: <158751095889.36773.6009825070990637468.stgit@djiang5-desk3.ch.intel.com> <158751205175.36773.1874642824360728883.stgit@djiang5-desk3.ch.intel.com> <20200423201118.GA29567@ziepe.ca> <35f701d9-1034-09c7-8117-87fb8796a017@linux.intel.com> <20200503222513.GS26002@ziepe.ca> <1ededeb8-deff-4db7-40e5-1d5e8a800f52@linux.intel.com> <20200503224659.GU26002@ziepe.ca> <8ff2aace-0697-b8ef-de68-1bcc49d6727f@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8ff2aace-0697-b8ef-de68-1bcc49d6727f@linux.intel.com> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org On Sun, May 03, 2020 at 05:25:28PM -0700, Dey, Megha wrote: > > > The use case if when we have a device assigned to a guest and we > > > want to allocate IMS(platform-msi) interrupts for that > > > guest-assigned device. Currently, this is abstracted through a mdev > > > interface. > > > > And the mdev has the pci_device internally, so it should simply pass > > that pci_device to the platform_msi machinery. > > hmm i am not sure I follow this. mdev has a pci_device internally? which > struct are you referring to here? mdev in general may not, but any ADI trying to use mdev will necessarily have access to a struct pci_device. > mdev is merely a micropartitioned PCI device right, which no real PCI > resource backing. I am not how else we can find the IRQ domain associated > with an mdev.. ADI always has real PCI resource backing. Jason