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Thu, 3 Nov 2022 09:18:01 -0700 Received: from drhqmail203.nvidia.com (10.126.190.182) by drhqmail203.nvidia.com (10.126.190.182) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.29; Thu, 3 Nov 2022 09:18:01 -0700 Received: from vdi.nvidia.com (10.127.8.9) by mail.nvidia.com (10.126.190.182) with Microsoft SMTP Server id 15.2.986.29 via Frontend Transport; Thu, 3 Nov 2022 09:17:54 -0700 From: Avihai Horon To: CC: Alex Williamson , Halil Pasic , Christian Borntraeger , Eric Farman , Richard Henderson , David Hildenbrand , "Ilya Leoshkevich" , Thomas Huth , "Juan Quintela" , "Dr. David Alan Gilbert" , "Michael S. Tsirkin" , Cornelia Huck , Paolo Bonzini , Stefan Hajnoczi , Fam Zheng , Eric Blake , Vladimir Sementsov-Ogievskiy , John Snow , , , Kunkun Jiang , "Zhang, Chen" , Yishai Hadas , Jason Gunthorpe , Maor Gottlieb , Shay Drory , Avihai Horon , Kirti Wankhede , Tarun Gupta , Joao Martins Subject: [PATCH v3 12/17] vfio/migration: Implement VFIO migration protocol v2 Date: Thu, 3 Nov 2022 18:16:15 +0200 Message-ID: <20221103161620.13120-13-avihaih@nvidia.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20221103161620.13120-1-avihaih@nvidia.com> References: <20221103161620.13120-1-avihaih@nvidia.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN8NAM11FT067:EE_|BY5PR12MB5000:EE_ X-MS-Office365-Filtering-Correlation-Id: dbae212a-a208-4f5c-5ef1-08dabdb702b4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.232; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc7edge1.nvidia.com; CAT:NONE; SFS:(13230022)(4636009)(376002)(346002)(136003)(39860400002)(396003)(451199015)(36840700001)(46966006)(40470700004)(336012)(478600001)(47076005)(426003)(30864003)(4326008)(70206006)(966005)(70586007)(8676002)(6666004)(2616005)(40460700003)(186003)(7416002)(1076003)(5660300002)(316002)(54906003)(36860700001)(6916009)(2906002)(82310400005)(41300700001)(7636003)(356005)(83380400001)(82740400003)(36756003)(7696005)(8936002)(86362001)(40480700001)(26005); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Nov 2022 16:18:14.6511 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: dbae212a-a208-4f5c-5ef1-08dabdb702b4 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.118.232]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT067.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR12MB5000 Received-SPF: softfail client-ip=40.107.244.56; envelope-from=avihaih@nvidia.com; helo=NAM12-MW2-obe.outbound.protection.outlook.com X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.047, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-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: , Sender: "Qemu-devel" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Add implementation of VFIO migration protocol v2. The two protocols, v1 and v2, will co-exist and in next patch v1 protocol will be removed. There are several main differences between v1 and v2 protocols: - VFIO device state is now represented as a finite state machine instead of a bitmap. - Migration interface with kernel is now done using VFIO_DEVICE_FEATURE ioctl and normal read() and write() instead of the migration region. - VFIO migration protocol v2 currently doesn't support the pre-copy phase of migration. Detailed information about VFIO migration protocol v2 and difference compared to v1 can be found here [1]. [1] https://lore.kernel.org/all/20220224142024.147653-10-yishaih@nvidia.com/ Signed-off-by: Avihai Horon --- hw/vfio/common.c | 19 +- hw/vfio/migration.c | 386 ++++++++++++++++++++++++++++++---- hw/vfio/trace-events | 4 + include/hw/vfio/vfio-common.h | 5 + 4 files changed, 375 insertions(+), 39 deletions(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 617e6cd901..0bdbd1586b 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -355,10 +355,18 @@ static bool vfio_devices_all_dirty_tracking(VFIOContainer *container) return false; } - if ((vbasedev->pre_copy_dirty_page_tracking == ON_OFF_AUTO_OFF) && + if (!migration->v2 && + (vbasedev->pre_copy_dirty_page_tracking == ON_OFF_AUTO_OFF) && (migration->device_state_v1 & VFIO_DEVICE_STATE_V1_RUNNING)) { return false; } + + if (migration->v2 && + (vbasedev->pre_copy_dirty_page_tracking == ON_OFF_AUTO_OFF) && + (migration->device_state == VFIO_DEVICE_STATE_RUNNING || + migration->device_state == VFIO_DEVICE_STATE_RUNNING_P2P)) { + return false; + } } } return true; @@ -385,7 +393,14 @@ static bool vfio_devices_all_running_and_mig_active(VFIOContainer *container) return false; } - if (migration->device_state_v1 & VFIO_DEVICE_STATE_V1_RUNNING) { + if (!migration->v2 && + migration->device_state_v1 & VFIO_DEVICE_STATE_V1_RUNNING) { + continue; + } + + if (migration->v2 && + (migration->device_state == VFIO_DEVICE_STATE_RUNNING || + migration->device_state == VFIO_DEVICE_STATE_RUNNING_P2P)) { continue; } else { return false; diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index e784374453..62afc23a8c 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -44,8 +44,84 @@ #define VFIO_MIG_FLAG_DEV_SETUP_STATE (0xffffffffef100003ULL) #define VFIO_MIG_FLAG_DEV_DATA_STATE (0xffffffffef100004ULL) +#define VFIO_MIG_DATA_BUFFER_SIZE (1024 * 1024) + static int64_t bytes_transferred; +static const char *mig_state_to_str(enum vfio_device_mig_state state) +{ + switch (state) { + case VFIO_DEVICE_STATE_ERROR: + return "ERROR"; + case VFIO_DEVICE_STATE_STOP: + return "STOP"; + case VFIO_DEVICE_STATE_RUNNING: + return "RUNNING"; + case VFIO_DEVICE_STATE_STOP_COPY: + return "STOP_COPY"; + case VFIO_DEVICE_STATE_RESUMING: + return "RESUMING"; + case VFIO_DEVICE_STATE_RUNNING_P2P: + return "RUNNING_P2P"; + default: + return "UNKNOWN STATE"; + } +} + +static int vfio_migration_set_state(VFIODevice *vbasedev, + enum vfio_device_mig_state new_state, + enum vfio_device_mig_state recover_state) +{ + VFIOMigration *migration = vbasedev->migration; + uint64_t buf[DIV_ROUND_UP(sizeof(struct vfio_device_feature) + + sizeof(struct vfio_device_feature_mig_state), + sizeof(uint64_t))] = {}; + struct vfio_device_feature *feature = (void *)buf; + struct vfio_device_feature_mig_state *mig_state = (void *)feature->data; + + feature->argsz = sizeof(buf); + feature->flags = + VFIO_DEVICE_FEATURE_SET | VFIO_DEVICE_FEATURE_MIG_DEVICE_STATE; + mig_state->device_state = new_state; + if (ioctl(vbasedev->fd, VFIO_DEVICE_FEATURE, feature)) { + /* Try to set the device in some good state */ + error_report( + "%s: Failed setting device state to %s, err: %s. Setting device in recover state %s", + vbasedev->name, mig_state_to_str(new_state), + strerror(errno), mig_state_to_str(recover_state)); + + mig_state->device_state = recover_state; + if (ioctl(vbasedev->fd, VFIO_DEVICE_FEATURE, feature)) { + hw_error("%s: Failed setting device in recover state, err: %s", + vbasedev->name, strerror(errno)); + } + + migration->device_state = recover_state; + + return -1; + } + + if (mig_state->data_fd != -1) { + if (migration->data_fd != -1) { + /* + * This can happen if the device is asynchronously reset and + * terminates a data transfer. + */ + error_report("%s: data_fd out of sync", vbasedev->name); + close(mig_state->data_fd); + + return -1; + } + + migration->data_fd = mig_state->data_fd; + } + migration->device_state = new_state; + + trace_vfio_migration_set_state(vbasedev->name, mig_state_to_str(new_state)); + + return 0; +} + static inline int vfio_mig_access(VFIODevice *vbasedev, void *val, int count, off_t off, bool iswrite) { @@ -260,6 +336,20 @@ static int vfio_save_buffer(QEMUFile *f, VFIODevice *vbasedev, uint64_t *size) return ret; } +static int vfio_load_buffer(QEMUFile *f, VFIODevice *vbasedev, + uint64_t data_size) +{ + VFIOMigration *migration = vbasedev->migration; + int ret; + + ret = qemu_file_get_to_fd(f, migration->data_fd, data_size); + if (!ret) { + trace_vfio_load_state_device_data(vbasedev->name, data_size); + } + + return ret; +} + static int vfio_v1_load_buffer(QEMUFile *f, VFIODevice *vbasedev, uint64_t data_size) { @@ -394,6 +484,14 @@ static int vfio_load_device_config_state(QEMUFile *f, void *opaque) return qemu_file_get_error(f); } +static void vfio_migration_cleanup(VFIODevice *vbasedev) +{ + VFIOMigration *migration = vbasedev->migration; + + close(migration->data_fd); + migration->data_fd = -1; +} + static void vfio_migration_v1_cleanup(VFIODevice *vbasedev) { VFIOMigration *migration = vbasedev->migration; @@ -405,6 +503,18 @@ static void vfio_migration_v1_cleanup(VFIODevice *vbasedev) /* ---------------------------------------------------------------------- */ +static int vfio_save_setup(QEMUFile *f, void *opaque) +{ + VFIODevice *vbasedev = opaque; + + trace_vfio_save_setup(vbasedev->name); + + qemu_put_be64(f, VFIO_MIG_FLAG_DEV_SETUP_STATE); + qemu_put_be64(f, VFIO_MIG_FLAG_END_OF_STATE); + + return qemu_file_get_error(f); +} + static int vfio_v1_save_setup(QEMUFile *f, void *opaque) { VFIODevice *vbasedev = opaque; @@ -448,6 +558,14 @@ static int vfio_v1_save_setup(QEMUFile *f, void *opaque) return 0; } +static void vfio_save_cleanup(void *opaque) +{ + VFIODevice *vbasedev = opaque; + + vfio_migration_cleanup(vbasedev); + trace_vfio_save_cleanup(vbasedev->name); +} + static void vfio_v1_save_cleanup(void *opaque) { VFIODevice *vbasedev = opaque; @@ -456,6 +574,23 @@ static void vfio_v1_save_cleanup(void *opaque) trace_vfio_save_cleanup(vbasedev->name); } +#define VFIO_MIG_PENDING_SIZE (512 * 1024 * 1024) +static void vfio_save_pending(void *opaque, uint64_t threshold_size, + uint64_t *res_precopy, uint64_t *res_postcopy) +{ + VFIODevice *vbasedev = opaque; + + /* + * VFIO migration protocol v2 currently doesn't have an API to get pending + * device state size. Until such API is introduced, report some big + * arbitrary pending size so the device will be taken into account for + * downtime limit calculations. + */ + *res_postcopy += VFIO_MIG_PENDING_SIZE; + + trace_vfio_save_pending(vbasedev->name, *res_precopy, *res_postcopy); +} + static void vfio_v1_save_pending(void *opaque, uint64_t threshold_size, uint64_t *res_precopy, uint64_t *res_postcopy) { @@ -520,6 +655,67 @@ static int vfio_save_iterate(QEMUFile *f, void *opaque) return 0; } +/* Returns 1 if end-of-stream is reached, 0 if more data and -1 if error */ +static int vfio_save_block(QEMUFile *f, VFIOMigration *migration) +{ + ssize_t data_size; + + data_size = read(migration->data_fd, migration->data_buffer, + migration->data_buffer_size); + if (data_size < 0) { + return -1; + } + if (data_size == 0) { + return 1; + } + + qemu_put_be64(f, VFIO_MIG_FLAG_DEV_DATA_STATE); + qemu_put_be64(f, data_size); + qemu_put_buffer(f, migration->data_buffer, data_size); + bytes_transferred += data_size; + + trace_vfio_save_block(migration->vbasedev->name, data_size); + + return qemu_file_get_error(f); +} + +static int vfio_save_complete_precopy(QEMUFile *f, void *opaque) +{ + VFIODevice *vbasedev = opaque; + enum vfio_device_mig_state recover_state; + int ret; + + /* We reach here with device state STOP only */ + recover_state = VFIO_DEVICE_STATE_STOP; + ret = vfio_migration_set_state(vbasedev, VFIO_DEVICE_STATE_STOP_COPY, + recover_state); + if (ret) { + return ret; + } + + do { + ret = vfio_save_block(f, vbasedev->migration); + if (ret < 0) { + return ret; + } + } while (!ret); + + qemu_put_be64(f, VFIO_MIG_FLAG_END_OF_STATE); + ret = qemu_file_get_error(f); + if (ret) { + return ret; + } + + recover_state = VFIO_DEVICE_STATE_ERROR; + ret = vfio_migration_set_state(vbasedev, VFIO_DEVICE_STATE_STOP, + recover_state); + if (!ret) { + trace_vfio_save_complete_precopy(vbasedev->name); + } + + return ret; +} + static int vfio_v1_save_complete_precopy(QEMUFile *f, void *opaque) { VFIODevice *vbasedev = opaque; @@ -589,6 +785,14 @@ static void vfio_save_state(QEMUFile *f, void *opaque) } } +static int vfio_load_setup(QEMUFile *f, void *opaque) +{ + VFIODevice *vbasedev = opaque; + + return vfio_migration_set_state(vbasedev, VFIO_DEVICE_STATE_RESUMING, + vbasedev->migration->device_state); +} + static int vfio_v1_load_setup(QEMUFile *f, void *opaque) { VFIODevice *vbasedev = opaque; @@ -616,6 +820,16 @@ static int vfio_v1_load_setup(QEMUFile *f, void *opaque) return ret; } +static int vfio_load_cleanup(void *opaque) +{ + VFIODevice *vbasedev = opaque; + + vfio_migration_cleanup(vbasedev); + trace_vfio_load_cleanup(vbasedev->name); + + return 0; +} + static int vfio_v1_load_cleanup(void *opaque) { VFIODevice *vbasedev = opaque; @@ -658,7 +872,11 @@ static int vfio_load_state(QEMUFile *f, void *opaque, int version_id) uint64_t data_size = qemu_get_be64(f); if (data_size) { - ret = vfio_v1_load_buffer(f, vbasedev, data_size); + if (vbasedev->migration->v2) { + ret = vfio_load_buffer(f, vbasedev, data_size); + } else { + ret = vfio_v1_load_buffer(f, vbasedev, data_size); + } if (ret < 0) { return ret; } @@ -679,6 +897,17 @@ static int vfio_load_state(QEMUFile *f, void *opaque, int version_id) return ret; } +static const SaveVMHandlers savevm_vfio_handlers = { + .save_setup = vfio_save_setup, + .save_cleanup = vfio_save_cleanup, + .save_live_pending = vfio_save_pending, + .save_live_complete_precopy = vfio_save_complete_precopy, + .save_state = vfio_save_state, + .load_setup = vfio_load_setup, + .load_cleanup = vfio_load_cleanup, + .load_state = vfio_load_state, +}; + static SaveVMHandlers savevm_vfio_v1_handlers = { .save_setup = vfio_v1_save_setup, .save_cleanup = vfio_v1_save_cleanup, @@ -693,6 +922,34 @@ static SaveVMHandlers savevm_vfio_v1_handlers = { /* ---------------------------------------------------------------------- */ +static void vfio_vmstate_change(void *opaque, bool running, RunState state) +{ + VFIODevice *vbasedev = opaque; + enum vfio_device_mig_state new_state; + int ret; + + if (running) { + new_state = VFIO_DEVICE_STATE_RUNNING; + } else { + new_state = VFIO_DEVICE_STATE_STOP; + } + + ret = vfio_migration_set_state(vbasedev, new_state, + VFIO_DEVICE_STATE_ERROR); + if (ret) { + /* + * Migration should be aborted in this case, but vm_state_notify() + * currently does not support reporting failures. + */ + if (migrate_get_current()->to_dst_file) { + qemu_file_set_error(migrate_get_current()->to_dst_file, ret); + } + } + + trace_vfio_vmstate_change(vbasedev->name, running, RunState_str(state), + mig_state_to_str(new_state)); +} + static void vfio_v1_vmstate_change(void *opaque, bool running, RunState state) { VFIODevice *vbasedev = opaque; @@ -766,12 +1023,17 @@ static void vfio_migration_state_notifier(Notifier *notifier, void *data) case MIGRATION_STATUS_CANCELLED: case MIGRATION_STATUS_FAILED: bytes_transferred = 0; - ret = vfio_migration_v1_set_state(vbasedev, - ~(VFIO_DEVICE_STATE_V1_SAVING | - VFIO_DEVICE_STATE_V1_RESUMING), - VFIO_DEVICE_STATE_V1_RUNNING); - if (ret) { - error_report("%s: Failed to set state RUNNING", vbasedev->name); + if (migration->v2) { + vfio_migration_set_state(vbasedev, VFIO_DEVICE_STATE_RUNNING, + VFIO_DEVICE_STATE_ERROR); + } else { + ret = vfio_migration_v1_set_state(vbasedev, + ~(VFIO_DEVICE_STATE_V1_SAVING | + VFIO_DEVICE_STATE_V1_RESUMING), + VFIO_DEVICE_STATE_V1_RUNNING); + if (ret) { + error_report("%s: Failed to set state RUNNING", vbasedev->name); + } } } } @@ -780,12 +1042,35 @@ static void vfio_migration_exit(VFIODevice *vbasedev) { VFIOMigration *migration = vbasedev->migration; - vfio_region_exit(&migration->region); - vfio_region_finalize(&migration->region); + if (migration->v2) { + g_free(migration->data_buffer); + } else { + vfio_region_exit(&migration->region); + vfio_region_finalize(&migration->region); + } g_free(vbasedev->migration); vbasedev->migration = NULL; } +static int vfio_migration_query_flags(VFIODevice *vbasedev, uint64_t *mig_flags) +{ + uint64_t buf[DIV_ROUND_UP(sizeof(struct vfio_device_feature) + + sizeof(struct vfio_device_feature_migration), + sizeof(uint64_t))] = {}; + struct vfio_device_feature *feature = (void *)buf; + struct vfio_device_feature_migration *mig = (void *)feature->data; + + feature->argsz = sizeof(buf); + feature->flags = VFIO_DEVICE_FEATURE_GET | VFIO_DEVICE_FEATURE_MIGRATION; + if (ioctl(vbasedev->fd, VFIO_DEVICE_FEATURE, feature)) { + return -EOPNOTSUPP; + } + + *mig_flags = mig->flags; + + return 0; +} + static int vfio_migration_init(VFIODevice *vbasedev) { int ret; @@ -794,6 +1079,7 @@ static int vfio_migration_init(VFIODevice *vbasedev) char id[256] = ""; g_autofree char *path = NULL, *oid = NULL; struct vfio_region_info *info = NULL; + uint64_t mig_flags; if (!vbasedev->ops->vfio_get_object) { return -EINVAL; @@ -804,34 +1090,51 @@ static int vfio_migration_init(VFIODevice *vbasedev) return -EINVAL; } - ret = vfio_get_dev_region_info(vbasedev, - VFIO_REGION_TYPE_MIGRATION_DEPRECATED, - VFIO_REGION_SUBTYPE_MIGRATION_DEPRECATED, - &info); - if (ret) { - return ret; - } + ret = vfio_migration_query_flags(vbasedev, &mig_flags); + if (!ret) { + /* Migration v2 */ + /* Basic migration functionality must be supported */ + if (!(mig_flags & VFIO_MIGRATION_STOP_COPY)) { + return -EOPNOTSUPP; + } + vbasedev->migration = g_new0(VFIOMigration, 1); + vbasedev->migration->device_state = VFIO_DEVICE_STATE_RUNNING; + vbasedev->migration->data_buffer_size = VFIO_MIG_DATA_BUFFER_SIZE; + vbasedev->migration->data_buffer = + g_malloc0(vbasedev->migration->data_buffer_size); + vbasedev->migration->data_fd = -1; + vbasedev->migration->v2 = true; + } else { + /* Migration v1 */ + ret = vfio_get_dev_region_info(vbasedev, + VFIO_REGION_TYPE_MIGRATION_DEPRECATED, + VFIO_REGION_SUBTYPE_MIGRATION_DEPRECATED, + &info); + if (ret) { + return ret; + } - vbasedev->migration = g_new0(VFIOMigration, 1); - vbasedev->migration->device_state_v1 = VFIO_DEVICE_STATE_V1_RUNNING; - vbasedev->migration->vm_running = runstate_is_running(); + vbasedev->migration = g_new0(VFIOMigration, 1); + vbasedev->migration->device_state_v1 = VFIO_DEVICE_STATE_V1_RUNNING; + vbasedev->migration->vm_running = runstate_is_running(); - ret = vfio_region_setup(obj, vbasedev, &vbasedev->migration->region, - info->index, "migration"); - if (ret) { - error_report("%s: Failed to setup VFIO migration region %d: %s", - vbasedev->name, info->index, strerror(-ret)); - goto err; - } + ret = vfio_region_setup(obj, vbasedev, &vbasedev->migration->region, + info->index, "migration"); + if (ret) { + error_report("%s: Failed to setup VFIO migration region %d: %s", + vbasedev->name, info->index, strerror(-ret)); + goto err; + } - if (!vbasedev->migration->region.size) { - error_report("%s: Invalid zero-sized VFIO migration region %d", - vbasedev->name, info->index); - ret = -EINVAL; - goto err; - } + if (!vbasedev->migration->region.size) { + error_report("%s: Invalid zero-sized VFIO migration region %d", + vbasedev->name, info->index); + ret = -EINVAL; + goto err; + } - g_free(info); + g_free(info); + } migration = vbasedev->migration; migration->vbasedev = vbasedev; @@ -844,11 +1147,20 @@ static int vfio_migration_init(VFIODevice *vbasedev) } strpadcpy(id, sizeof(id), path, '\0'); - register_savevm_live(id, VMSTATE_INSTANCE_ID_ANY, 1, - &savevm_vfio_v1_handlers, vbasedev); + if (migration->v2) { + register_savevm_live(id, VMSTATE_INSTANCE_ID_ANY, 1, + &savevm_vfio_handlers, vbasedev); + + migration->vm_state = qdev_add_vm_change_state_handler( + vbasedev->dev, vfio_vmstate_change, vbasedev); + } else { + register_savevm_live(id, VMSTATE_INSTANCE_ID_ANY, 1, + &savevm_vfio_v1_handlers, vbasedev); + + migration->vm_state = qdev_add_vm_change_state_handler( + vbasedev->dev, vfio_v1_vmstate_change, vbasedev); + } - migration->vm_state = qdev_add_vm_change_state_handler( - vbasedev->dev, vfio_v1_vmstate_change, vbasedev); migration->migration_state.notify = vfio_migration_state_notifier; add_migration_state_change_notifier(&migration->migration_state); return 0; diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events index d88d2b4053..9ef84e24b2 100644 --- a/hw/vfio/trace-events +++ b/hw/vfio/trace-events @@ -149,7 +149,9 @@ vfio_display_edid_write_error(void) "" # migration.c vfio_migration_probe(const char *name) " (%s)" +vfio_migration_set_state(const char *name, const char *state) " (%s) state %s" vfio_migration_v1_set_state(const char *name, uint32_t state) " (%s) state %d" +vfio_vmstate_change(const char *name, int running, const char *reason, const char *dev_state) " (%s) running %d reason %s device state %s" vfio_v1_vmstate_change(const char *name, int running, const char *reason, uint32_t dev_state) " (%s) running %d reason %s device state %d" vfio_migration_state_notifier(const char *name, const char *state) " (%s) state %s" vfio_save_setup(const char *name) " (%s)" @@ -163,6 +165,8 @@ vfio_save_complete_precopy(const char *name) " (%s)" vfio_load_device_config_state(const char *name) " (%s)" vfio_load_state(const char *name, uint64_t data) " (%s) data 0x%"PRIx64 vfio_v1_load_state_device_data(const char *name, uint64_t data_offset, uint64_t data_size) " (%s) Offset 0x%"PRIx64" size 0x%"PRIx64 +vfio_load_state_device_data(const char *name, uint64_t data_size) " (%s) size 0x%"PRIx64 vfio_load_cleanup(const char *name) " (%s)" vfio_get_dirty_bitmap(int fd, uint64_t iova, uint64_t size, uint64_t bitmap_size, uint64_t start) "container fd=%d, iova=0x%"PRIx64" size= 0x%"PRIx64" bitmap_size=0x%"PRIx64" start=0x%"PRIx64 vfio_iommu_map_dirty_notify(uint64_t iova_start, uint64_t iova_end) "iommu dirty @ 0x%"PRIx64" - 0x%"PRIx64 +vfio_save_block(const char *name, int data_size) " (%s) data_size %d" diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index bbaf72ba00..2ec3346fea 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -66,6 +66,11 @@ typedef struct VFIOMigration { int vm_running; Notifier migration_state; uint64_t pending_bytes; + enum vfio_device_mig_state device_state; + int data_fd; + void *data_buffer; + size_t data_buffer_size; + bool v2; } VFIOMigration; typedef struct VFIOAddressSpace {