From nobody Mon Feb 9 14:34:15 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1571925557; cv=none; d=zoho.com; s=zohoarc; b=U+oI3O0u0+Tk76grFBpQZ9/D87bODIzg6UvDZafkvWxlQsApUCErMqDqZIDETvCpTVT/alPiroWWyTNB4w4TsVlEf/qPKw2MNSOOYucLuiYE8lqqe8shpy5zLAVKaiN5aqImmEs9UbEjnoawLfiuvj4WXclpbHdLCl0YFvWeHmY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1571925557; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To; bh=3xbSOTMY77EA3tWXkqlMF39yFWN8bfOICsQPSQjSU6o=; b=llzZY3XOZSqZdKEse2kfMzVcaos4U4GAhtTd/BobjeYbMfEiduLGpvRjjzR8D4JBSmJO99sHySbb56ny3Su1TpeKMHFo2q6jmHjt6tcaLV68caHk+JT2uBcP13DKYaUVbU3ewTMFLerIfR1RSFMxm1U8IQUvRBsIvy7Fnq9usDg= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1571925557052252.4911302900008; Thu, 24 Oct 2019 06:59:17 -0700 (PDT) Received: from localhost ([::1]:43402 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iNddz-00041A-4H for importer@patchew.org; Thu, 24 Oct 2019 09:59:15 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51408) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iNckI-0005FW-Gz for qemu-devel@nongnu.org; Thu, 24 Oct 2019 09:01:47 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iNckG-0002Su-Ls for qemu-devel@nongnu.org; Thu, 24 Oct 2019 09:01:42 -0400 Received: from mga11.intel.com ([192.55.52.93]:40489) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iNckG-0002NX-E6 for qemu-devel@nongnu.org; Thu, 24 Oct 2019 09:01:40 -0400 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 24 Oct 2019 06:01:30 -0700 Received: from iov.bj.intel.com ([10.238.145.67]) by fmsmga001.fm.intel.com with ESMTP; 24 Oct 2019 06:01:27 -0700 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,224,1569308400"; d="scan'208";a="210156206" From: Liu Yi L To: qemu-devel@nongnu.org, mst@redhat.com, pbonzini@redhat.com, alex.williamson@redhat.com, peterx@redhat.com Subject: [RFC v2 07/22] hw/pci: introduce pci_device_iommu_context() Date: Thu, 24 Oct 2019 08:34:28 -0400 Message-Id: <1571920483-3382-8-git-send-email-yi.l.liu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1571920483-3382-1-git-send-email-yi.l.liu@intel.com> References: <1571920483-3382-1-git-send-email-yi.l.liu@intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.93 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: tianyu.lan@intel.com, kevin.tian@intel.com, yi.l.liu@intel.com, Yi Sun , kvm@vger.kernel.org, jun.j.tian@intel.com, eric.auger@redhat.com, yi.y.sun@intel.com, jacob.jun.pan@linux.intel.com, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" This patch adds pci_device_iommu_context() to get an iommu_context for a given device. A new callback is added in PCIIOMMUOps. Users who wants to listen to events issued by vIOMMU could use this new interface to get an iommu_context and register their own notifiers, then wait for notifications from vIOMMU. e.g. VFIO is the first user of it to listen to the PASID_ALLOC/PASID_BIND/CACHE_INV events and propagate the events to host. Cc: Kevin Tian Cc: Jacob Pan Cc: Peter Xu Cc: Eric Auger Cc: Yi Sun Cc: David Gibson Signed-off-by: Liu Yi L Reviewed-by: David Gibson Reviewed-by: Peter Xu --- hw/pci/pci.c | 16 ++++++++++++++++ include/hw/pci/pci.h | 5 +++++ 2 files changed, 21 insertions(+) diff --git a/hw/pci/pci.c b/hw/pci/pci.c index b5ce9ca..4e6af06 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -2625,6 +2625,22 @@ AddressSpace *pci_device_iommu_address_space(PCIDevi= ce *dev) return &address_space_memory; } =20 +IOMMUContext *pci_device_iommu_context(PCIDevice *dev) +{ + PCIBus *bus =3D pci_get_bus(dev); + PCIBus *iommu_bus =3D bus; + + while (iommu_bus && !iommu_bus->iommu_ops && iommu_bus->parent_dev) { + iommu_bus =3D pci_get_bus(iommu_bus->parent_dev); + } + if (iommu_bus && iommu_bus->iommu_ops && + iommu_bus->iommu_ops->get_iommu_context) { + return iommu_bus->iommu_ops->get_iommu_context(bus, + iommu_bus->iommu_opaque, dev->devfn); + } + return NULL; +} + void pci_setup_iommu(PCIBus *bus, const PCIIOMMUOps *ops, void *opaque) { bus->iommu_ops =3D ops; diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index d9fed8d..ccada47 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -9,6 +9,8 @@ =20 #include "hw/pci/pcie.h" =20 +#include "hw/iommu/iommu.h" + extern bool pci_available; =20 /* PCI bus */ @@ -484,9 +486,12 @@ typedef struct PCIIOMMUOps PCIIOMMUOps; struct PCIIOMMUOps { AddressSpace * (*get_address_space)(PCIBus *bus, void *opaque, int32_t devfn); + IOMMUContext * (*get_iommu_context)(PCIBus *bus, + void *opaque, int32_t devfn); }; =20 AddressSpace *pci_device_iommu_address_space(PCIDevice *dev); +IOMMUContext *pci_device_iommu_context(PCIDevice *dev); void pci_setup_iommu(PCIBus *bus, const PCIIOMMUOps *iommu_ops, void *opaq= ue); =20 static inline void --=20 2.7.4