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Tsirkin" , Marcel Apfelbaum , Peter Xu , Fabiano Rosas , Steve Sistare Subject: [PATCH V5 35/38] vfio/iommufd: change process Date: Tue, 10 Jun 2025 08:39:48 -0700 Message-Id: <1749569991-25171-36-git-send-email-steven.sistare@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1749569991-25171-1-git-send-email-steven.sistare@oracle.com> References: <1749569991-25171-1-git-send-email-steven.sistare@oracle.com> X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-06-10_07,2025-06-10_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 malwarescore=0 mlxscore=0 mlxlogscore=999 phishscore=0 spamscore=0 suspectscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2505160000 definitions=main-2506100125 X-Proofpoint-GUID: 2o2Kiuc1qa8dgZd0Jhw0eQxsM_tyhmJD X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNjEwMDEyNiBTYWx0ZWRfX0B9smrk+UM8F SfSauYTqpPIzepJ19GlFwgj3LWr8MhViKTRp3FGkdQueOKpI4BTJK6S9e4JLwqpVbvXghcbAbjO nW+dPVDPZznLYMstdhf+1fwUTqlSrmiHht0MVyMJyAaIhjjAszeuzT/e50fZCnNgvJrzc8gjGB4 5MohMBaKA5wVpS6OaefD0z97p9k1oZM1gbmT58rugR2NHHDIb1Tt9yfkHorO2oq1ha5O/ITooXX sZoU4gYilzjjTJ+umLkMyNU0qnSG4iqBhj67sVnF80eRG4wIoVQbb/W+LsKaqKSlfWVOLIpCSGz CGAjhCuofBXviYFSe3yZPg1v7Ab+8limJID4COSIisB+96tZ9Fzs77Tv9GOcZ4Gy87MDSKoUyJv uEmGgFO1TkBfrp1ADdZBHW2AGJrpEJeTATTHmyI5oNyI08SBDATMqJ4DTQLhTjPzNmSWOpnY X-Proofpoint-ORIG-GUID: 2o2Kiuc1qa8dgZd0Jhw0eQxsM_tyhmJD X-Authority-Analysis: v=2.4 cv=d731yQjE c=1 sm=1 tr=0 ts=68485200 b=1 cx=c_pps a=e1sVV491RgrpLwSTMOnk8w==:117 a=e1sVV491RgrpLwSTMOnk8w==:17 a=6IFa9wvqVegA:10 a=yPCof4ZbAAAA:8 a=gWtQGTm9eWn5DmmnD7oA:9 cc=ntf awl=host:14714 Received-SPF: pass client-ip=205.220.177.32; envelope-from=steven.sistare@oracle.com; helo=mx0b-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Finish CPR by change the owning process of the iommufd device in post load. Signed-off-by: Steve Sistare --- hw/vfio/cpr-iommufd.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/hw/vfio/cpr-iommufd.c b/hw/vfio/cpr-iommufd.c index 152a661..a9e3f68 100644 --- a/hw/vfio/cpr-iommufd.c +++ b/hw/vfio/cpr-iommufd.c @@ -110,10 +110,40 @@ static bool vfio_cpr_supported(IOMMUFDBackend *be, Error **errp) return true; } +static int iommufd_cpr_pre_save(void *opaque) +{ + IOMMUFDBackend *be = opaque; + Error *local_err = NULL; + + /* + * The process has not changed yet, but proactively call the ioctl, + * and it will fail if any DMA mappings are not supported. + */ + if (!iommufd_change_process(be, &local_err)) { + error_report_err(local_err); + return -1; + } + return 0; +} + +static int iommufd_cpr_post_load(void *opaque, int version_id) +{ + IOMMUFDBackend *be = opaque; + Error *local_err = NULL; + + if (!iommufd_change_process(be, &local_err)) { + error_report_err(local_err); + return -1; + } + return 0; +} + static const VMStateDescription iommufd_cpr_vmstate = { .name = "iommufd", .version_id = 0, .minimum_version_id = 0, + .pre_save = iommufd_cpr_pre_save, + .post_load = iommufd_cpr_post_load, .needed = cpr_incoming_needed, .fields = (VMStateField[]) { VMSTATE_END_OF_LIST() -- 1.8.3.1