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Subject: [PATCH v5 13/20] vfio/ap: Allow the selection of a given iommu backend Date: Thu, 9 Nov 2023 19:45:22 +0800 Message-Id: <20231109114529.1904193-14-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+importer=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: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01, T_SPF_HELO_TEMPERROR=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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1699531410796100003 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-ap device: if the user wants to use the legacy backend, it shall not link the vfio-ap device with any iommufd object: -device vfio-ap,sysfsdev=3D/sys/bus/mdev/devices/XXX 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-ap device options: -object iommufd,id=3Diommufd0 -device vfio-ap,sysfsdev=3D/sys/bus/mdev/devices/XXX,iommufd=3Diommufd0 Suggested-by: Alex Williamson Signed-off-by: Zhenzhong Duan Reviewed-by: Matthew Rosato --- hw/vfio/ap.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c index bbf69ff55a..80629609ae 100644 --- a/hw/vfio/ap.c +++ b/hw/vfio/ap.c @@ -11,10 +11,12 @@ */ =20 #include "qemu/osdep.h" +#include CONFIG_DEVICES /* CONFIG_IOMMUFD */ #include #include #include "qapi/error.h" #include "hw/vfio/vfio-common.h" +#include "sysemu/iommufd.h" #include "hw/s390x/ap-device.h" #include "qemu/error-report.h" #include "qemu/event_notifier.h" @@ -204,6 +206,10 @@ static void vfio_ap_unrealize(DeviceState *dev) =20 static Property vfio_ap_properties[] =3D { DEFINE_PROP_STRING("sysfsdev", VFIOAPDevice, vdev.sysfsdev), +#ifdef CONFIG_IOMMUFD + DEFINE_PROP_LINK("iommufd", VFIOAPDevice, vdev.iommufd, + TYPE_IOMMUFD_BACKEND, IOMMUFDBackend *), +#endif DEFINE_PROP_END_OF_LIST(), }; =20 --=20 2.34.1