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a="67685115" X-IronPort-AV: E=Sophos;i="6.17,312,1747724400"; d="scan'208";a="67685115" X-CSE-ConnectionGUID: XdC0fLTzRHi+Gm10oFioRQ== X-CSE-MsgGUID: 7WuIbyj4QbOBabNUEf9tdg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,263,1754982000"; d="scan'208";a="185529833" From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex@shazbot.org, clg@redhat.com, mst@redhat.com, jasowang@redhat.com, yi.l.liu@intel.com, clement.mathieu--drif@eviden.com, eric.auger@redhat.com, joao.m.martins@oracle.com, avihaih@nvidia.com, xudong.hao@intel.com, giovanni.cabiddu@intel.com, rohith.s.r@intel.com, mark.gross@intel.com, arjan.van.de.ven@intel.com, Zhenzhong Duan Subject: [PATCH v4 01/10] vfio/iommufd: Add framework code to support getting dirty bitmap before unmap Date: Wed, 29 Oct 2025 05:53:44 -0400 Message-ID: <20251029095354.56305-2-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20251029095354.56305-1-zhenzhong.duan@intel.com> References: <20251029095354.56305-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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=198.175.65.14; 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, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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: 1761731798498154100 Currently we support device and iommu dirty tracking, device dirty tracking is preferred. Add the framework code in iommufd_cdev_unmap() to choose either device or iommu dirty tracking, just like vfio_legacy_dma_unmap_one(). Signed-off-by: Zhenzhong Duan Reviewed-by: C=C3=A9dric Le Goater Reviewed-by: Yi Liu Tested-by: Xudong Hao Tested-by: Giovannio Cabiddu Tested-by: Rohith S R --- hw/vfio/iommufd.c | 34 +++++++++++++++++++++++++++++++--- 1 file changed, 31 insertions(+), 3 deletions(-) diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c index bb5775aa71..806ca6ef14 100644 --- a/hw/vfio/iommufd.c +++ b/hw/vfio/iommufd.c @@ -61,14 +61,42 @@ static int iommufd_cdev_unmap(const VFIOContainer *bcon= tainer, IOMMUTLBEntry *iotlb, bool unmap_all) { const VFIOIOMMUFDContainer *container =3D VFIO_IOMMU_IOMMUFD(bcontaine= r); + IOMMUFDBackend *be =3D container->be; + uint32_t ioas_id =3D container->ioas_id; + bool need_dirty_sync =3D false; + Error *local_err =3D NULL; + int ret; =20 if (unmap_all) { size =3D UINT64_MAX; } =20 - /* TODO: Handle dma_unmap_bitmap with iotlb args (migration) */ - return iommufd_backend_unmap_dma(container->be, - container->ioas_id, iova, size); + if (iotlb && vfio_container_dirty_tracking_is_started(bcontainer)) { + if (!vfio_container_devices_dirty_tracking_is_supported(bcontainer= ) && + bcontainer->dirty_pages_supported) { + /* TODO: query dirty bitmap before DMA unmap */ + return iommufd_backend_unmap_dma(be, ioas_id, iova, size); + } + + need_dirty_sync =3D true; + } + + ret =3D iommufd_backend_unmap_dma(be, ioas_id, iova, size); + if (ret) { + return ret; + } + + if (need_dirty_sync) { + ret =3D vfio_container_query_dirty_bitmap(bcontainer, iova, size, + iotlb->translated_addr, + &local_err); + if (ret) { + error_report_err(local_err); + return ret; + } + } + + return 0; } =20 static bool iommufd_cdev_kvm_device_add(VFIODevice *vbasedev, Error **errp) --=20 2.47.1