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=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 39465C433E2 for ; Thu, 10 Sep 2020 10:49:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DFCE320BED for ; Thu, 10 Sep 2020 10:49:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729161AbgIJKtc (ORCPT ); Thu, 10 Sep 2020 06:49:32 -0400 Received: from mga06.intel.com ([134.134.136.31]:21893 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727018AbgIJKqx (ORCPT ); Thu, 10 Sep 2020 06:46:53 -0400 IronPort-SDR: XJt6iHu1mKw0Q1TQF8Xc65b4eCQ9hW6Qa1Tt2dRYTRqVetnlSeiMRCv1PliUWRH7gaIivlRceR M8svYdIQ913g== X-IronPort-AV: E=McAfee;i="6000,8403,9739"; a="220066293" X-IronPort-AV: E=Sophos;i="5.76,412,1592895600"; d="scan'208";a="220066293" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Sep 2020 03:43:35 -0700 IronPort-SDR: 8hUgp4Evj/ZrvmZva5fLAVk62BQgEfT5LCfHHGRlnrglQZ/c950uDT0bV2hipkAnW2ypGx1mvp 9i68g1mug5Kg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.76,412,1592895600"; d="scan'208";a="334137217" Received: from jacob-builder.jf.intel.com ([10.7.199.155]) by orsmga008.jf.intel.com with ESMTP; 10 Sep 2020 03:43:35 -0700 From: Liu Yi L To: alex.williamson@redhat.com, eric.auger@redhat.com, baolu.lu@linux.intel.com, joro@8bytes.org Cc: kevin.tian@intel.com, jacob.jun.pan@linux.intel.com, ashok.raj@intel.com, yi.l.liu@intel.com, jun.j.tian@intel.com, yi.y.sun@intel.com, jean-philippe@linaro.org, peterx@redhat.com, jasowang@redhat.com, hao.wu@intel.com, stefanha@gmail.com, iommu@lists.linux-foundation.org, kvm@vger.kernel.org Subject: [PATCH v7 13/16] vfio/pci: Expose PCIe PASID capability to guest Date: Thu, 10 Sep 2020 03:45:30 -0700 Message-Id: <1599734733-6431-14-git-send-email-yi.l.liu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1599734733-6431-1-git-send-email-yi.l.liu@intel.com> References: <1599734733-6431-1-git-send-email-yi.l.liu@intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This patch exposes PCIe PASID capability to guest for assigned devices. Existing vfio_pci driver hides it from guest by setting the capability length as 0 in pci_ext_cap_length[]. And this patch only exposes PASID capability for devices which has PCIe PASID extended struture in its configuration space. VFs will not expose the PASID capability as they do not implement the PASID extended structure in their config space. It is a TODO in future. Related discussion can be found in below link: https://lore.kernel.org/kvm/20200407095801.648b1371@w520.home/ Cc: Kevin Tian CC: Jacob Pan Cc: Alex Williamson Cc: Eric Auger Cc: Jean-Philippe Brucker Cc: Joerg Roedel Cc: Lu Baolu Signed-off-by: Liu Yi L Reviewed-by: Eric Auger --- v5 -> v6: *) add review-by from Eric Auger. v1 -> v2: *) added in v2, but it was sent in a separate patchseries before --- drivers/vfio/pci/vfio_pci_config.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/vfio/pci/vfio_pci_config.c b/drivers/vfio/pci/vfio_pci_config.c index d98843f..07ff2e6 100644 --- a/drivers/vfio/pci/vfio_pci_config.c +++ b/drivers/vfio/pci/vfio_pci_config.c @@ -95,7 +95,7 @@ static const u16 pci_ext_cap_length[PCI_EXT_CAP_ID_MAX + 1] = { [PCI_EXT_CAP_ID_LTR] = PCI_EXT_CAP_LTR_SIZEOF, [PCI_EXT_CAP_ID_SECPCI] = 0, /* not yet */ [PCI_EXT_CAP_ID_PMUX] = 0, /* not yet */ - [PCI_EXT_CAP_ID_PASID] = 0, /* not yet */ + [PCI_EXT_CAP_ID_PASID] = PCI_EXT_CAP_PASID_SIZEOF, }; /* -- 2.7.4