From patchwork Wed Jun 24 08:55:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 11622675 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1211D92A for ; Wed, 24 Jun 2020 08:50:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E9D1920C09 for ; Wed, 24 Jun 2020 08:50:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389386AbgFXIuA (ORCPT ); Wed, 24 Jun 2020 04:50:00 -0400 Received: from mga01.intel.com ([192.55.52.88]:1312 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388660AbgFXItD (ORCPT ); Wed, 24 Jun 2020 04:49:03 -0400 IronPort-SDR: mxR51ucmsAByMv8Mj3avbsNbKpPWNGljqx0QCmxI2yJoWulyRFti+rIdcAdXoUEBpwi44/lbgI J5N2w6YH256w== X-IronPort-AV: E=McAfee;i="6000,8403,9661"; a="162484885" X-IronPort-AV: E=Sophos;i="5.75,274,1589266800"; d="scan'208";a="162484885" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jun 2020 01:48:57 -0700 IronPort-SDR: L6FoifsQFx4bA/nHCHryDV9h3rCjZnQr9jzuF8ltGq+kNNkgdJO6S4ZIx+OJJBPduTU03ZVA7l xdsrMNCFhUow== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,274,1589266800"; d="scan'208";a="275624527" Received: from jacob-builder.jf.intel.com ([10.7.199.155]) by orsmga003.jf.intel.com with ESMTP; 24 Jun 2020 01:48:56 -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, hao.wu@intel.com, iommu@lists.linux-foundation.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 12/14] vfio/pci: Expose PCIe PASID capability to guest Date: Wed, 24 Jun 2020 01:55:25 -0700 Message-Id: <1592988927-48009-13-git-send-email-yi.l.liu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1592988927-48009-1-git-send-email-yi.l.liu@intel.com> References: <1592988927-48009-1-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. So VFs, will will not see PASID capability on VFs as VF doesn't implement PASID extended structure in its configuration space. For VF, it is a TODO in future. Related discussion can be found in below link: https://lkml.org/lkml/2020/4/7/693 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 --- 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 8746c94..56d126b 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, }; /*