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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 9DC59C433E0 for ; Mon, 22 Mar 2021 14:11:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5A8D26196C for ; Mon, 22 Mar 2021 14:11:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229526AbhCVOLN (ORCPT ); Mon, 22 Mar 2021 10:11:13 -0400 Received: from foss.arm.com ([217.140.110.172]:60946 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230181AbhCVOLH (ORCPT ); Mon, 22 Mar 2021 10:11:07 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 638EB1042; Mon, 22 Mar 2021 07:11:07 -0700 (PDT) Received: from e123427-lin.arm.com (unknown [10.57.55.31]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id EA75C3F719; Mon, 22 Mar 2021 07:11:05 -0700 (PDT) From: Lorenzo Pieralisi To: linux-pci@vger.kernel.org, Jon Derrick , iommu@lists.linux-foundation.org Cc: Lorenzo Pieralisi , Joerg Roedel , Nirmal Patel , Kapil Karkra , Bjorn Helgaas , Krzysztof Wilczynski , Lu Baolu Subject: Re: [PATCH v4 0/2] VMD MSI Remapping Bypass Date: Mon, 22 Mar 2021 14:11:00 +0000 Message-Id: <161642217049.2836.9881489151722165383.b4-ty@arm.com> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20210210161315.316097-1-jonathan.derrick@intel.com> References: <20210210161315.316097-1-jonathan.derrick@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On Wed, 10 Feb 2021 09:13:13 -0700, Jon Derrick wrote: > The Intel Volume Management Device acts similar to a PCI-to-PCI bridge in that > it changes downstream devices' requester-ids to its own. As VMD supports PCIe > devices, it has its own MSI-X table and transmits child device MSI-X by > remapping child device MSI-X and handling like a demultiplexer. > > Some newer VMD devices (Icelake Server) have an option to bypass the VMD MSI-X > remapping table. This allows for better performance scaling as the child device > MSI-X won't be limited by VMD's MSI-X count and IRQ handler. > > [...] Applied to pci/vmd, thanks! [1/2] iommu/vt-d: Use Real PCI DMA device for IRTE https://git.kernel.org/lpieralisi/pci/c/9b4a824b88 [2/2] PCI: vmd: Disable MSI-X remapping when possible https://git.kernel.org/lpieralisi/pci/c/ee81ee84f8 Thanks, Lorenzo