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a="369305844" X-IronPort-AV: E=Sophos;i="6.03,289,1694761200"; d="scan'208";a="369305844" X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.03,289,1694761200"; d="scan'208";a="11516097" From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, jgg@nvidia.com, nicolinc@nvidia.com, joao.m.martins@oracle.com, eric.auger@redhat.com, peterx@redhat.com, jasowang@redhat.com, kevin.tian@intel.com, yi.l.liu@intel.com, yi.y.sun@intel.com, chao.p.peng@intel.com, Zhenzhong Duan Subject: [PATCH v5 11/20] vfio/platform: Allow the selection of a given iommu backend Date: Thu, 9 Nov 2023 19:45:20 +0800 Message-Id: <20231109114529.1904193-12-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231109114529.1904193-1-zhenzhong.duan@intel.com> References: <20231109114529.1904193-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=192.55.52.136; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -39 X-Spam_score: -4.0 X-Spam_bar: ---- X-Spam_report: (-4.0 / 5.0 requ) BAYES_00=-1.9, DKIM_INVALID=0.1, DKIM_SIGNED=0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1699531468797100001 Content-Type: text/plain; charset="utf-8" Now we support two types of iommu backends, let's add the capability to select one of them. This depends on whether an iommufd object has been linked with the vfio-platform device: If the user wants to use the legacy backend, it shall not link the vfio-platform device with any iommufd object: -device vfio-platform,host=3DXXX This is called the legacy mode/backend. If the user wants to use the iommufd backend (/dev/iommu) it shall pass an iommufd object id in the vfio-platform device options: -object iommufd,id=3Diommufd0 -device vfio-platform,host=3DXXX,iommufd=3Diommufd0 Suggested-by: Alex Williamson Signed-off-by: Zhenzhong Duan --- include/hw/vfio/vfio-platform.h | 1 + hw/vfio/platform.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/include/hw/vfio/vfio-platform.h b/include/hw/vfio/vfio-platfor= m.h index c414c3dffc..f57f4276f2 100644 --- a/include/hw/vfio/vfio-platform.h +++ b/include/hw/vfio/vfio-platform.h @@ -18,6 +18,7 @@ =20 #include "hw/sysbus.h" #include "hw/vfio/vfio-common.h" +#include "sysemu/iommufd.h" #include "qemu/event_notifier.h" #include "qemu/queue.h" #include "qom/object.h" diff --git a/hw/vfio/platform.c b/hw/vfio/platform.c index 8e3d4ac458..86e176ee97 100644 --- a/hw/vfio/platform.c +++ b/hw/vfio/platform.c @@ -15,6 +15,7 @@ */ =20 #include "qemu/osdep.h" +#include CONFIG_DEVICES /* CONFIG_IOMMUFD */ #include "qapi/error.h" #include #include @@ -649,6 +650,10 @@ static Property vfio_platform_dev_properties[] =3D { DEFINE_PROP_UINT32("mmap-timeout-ms", VFIOPlatformDevice, mmap_timeout, 1100), DEFINE_PROP_BOOL("x-irqfd", VFIOPlatformDevice, irqfd_allowed, true), +#ifdef CONFIG_IOMMUFD + DEFINE_PROP_LINK("iommufd", VFIOPlatformDevice, vbasedev.iommufd, + TYPE_IOMMUFD_BACKEND, IOMMUFDBackend *), +#endif DEFINE_PROP_END_OF_LIST(), }; =20 --=20 2.34.1