diff --git a/hmp.c b/hmp.c
index 35a7041824..1727c9c003 100644
--- a/hmp.c
+++ b/hmp.c
@@ -293,23 +293,23 @@ void hmp_info_migrate_parameters(Monitor *mon, const QDict *qdict)
 
     if (params) {
         assert(params->has_compress_level);
-        monitor_printf(mon, "%s: %" PRId64 "\n",
+        monitor_printf(mon, "%s: %u\n",
             MigrationParameter_str(MIGRATION_PARAMETER_COMPRESS_LEVEL),
             params->compress_level);
         assert(params->has_compress_threads);
-        monitor_printf(mon, "%s: %" PRId64 "\n",
+        monitor_printf(mon, "%s: %u\n",
             MigrationParameter_str(MIGRATION_PARAMETER_COMPRESS_THREADS),
             params->compress_threads);
         assert(params->has_decompress_threads);
-        monitor_printf(mon, "%s: %" PRId64 "\n",
+        monitor_printf(mon, "%s: %u\n",
             MigrationParameter_str(MIGRATION_PARAMETER_DECOMPRESS_THREADS),
             params->decompress_threads);
         assert(params->has_cpu_throttle_initial);
-        monitor_printf(mon, "%s: %" PRId64 "\n",
+        monitor_printf(mon, "%s: %u\n",
             MigrationParameter_str(MIGRATION_PARAMETER_CPU_THROTTLE_INITIAL),
             params->cpu_throttle_initial);
         assert(params->has_cpu_throttle_increment);
-        monitor_printf(mon, "%s: %" PRId64 "\n",
+        monitor_printf(mon, "%s: %u\n",
             MigrationParameter_str(MIGRATION_PARAMETER_CPU_THROTTLE_INCREMENT),
             params->cpu_throttle_increment);
         assert(params->has_tls_creds);
@@ -321,28 +321,28 @@ void hmp_info_migrate_parameters(Monitor *mon, const QDict *qdict)
             MigrationParameter_str(MIGRATION_PARAMETER_TLS_HOSTNAME),
             params->tls_hostname);
         assert(params->has_max_bandwidth);
-        monitor_printf(mon, "%s: %" PRId64 " bytes/second\n",
+        monitor_printf(mon, "%s: %" PRIu64 " bytes/second\n",
             MigrationParameter_str(MIGRATION_PARAMETER_MAX_BANDWIDTH),
             params->max_bandwidth);
         assert(params->has_downtime_limit);
-        monitor_printf(mon, "%s: %" PRId64 " milliseconds\n",
+        monitor_printf(mon, "%s: %" PRIu64 " milliseconds\n",
             MigrationParameter_str(MIGRATION_PARAMETER_DOWNTIME_LIMIT),
             params->downtime_limit);
         assert(params->has_x_checkpoint_delay);
-        monitor_printf(mon, "%s: %" PRId64 "\n",
+        monitor_printf(mon, "%s: %u\n",
             MigrationParameter_str(MIGRATION_PARAMETER_X_CHECKPOINT_DELAY),
             params->x_checkpoint_delay);
         assert(params->has_block_incremental);
         monitor_printf(mon, "%s: %s\n",
             MigrationParameter_str(MIGRATION_PARAMETER_BLOCK_INCREMENTAL),
             params->block_incremental ? "on" : "off");
-        monitor_printf(mon, "%s: %" PRId64 "\n",
+        monitor_printf(mon, "%s: %u\n",
             MigrationParameter_str(MIGRATION_PARAMETER_X_MULTIFD_CHANNELS),
             params->x_multifd_channels);
-        monitor_printf(mon, "%s: %" PRId64 "\n",
+        monitor_printf(mon, "%s: %u\n",
             MigrationParameter_str(MIGRATION_PARAMETER_X_MULTIFD_PAGE_COUNT),
             params->x_multifd_page_count);
-        monitor_printf(mon, "%s: %" PRId64 "\n",
+        monitor_printf(mon, "%s: %" PRIu64 "\n",
             MigrationParameter_str(MIGRATION_PARAMETER_XBZRLE_CACHE_SIZE),
             params->xbzrle_cache_size);
     }
diff --git a/migration/migration.c b/migration/migration.c
index 4de3b551fe..8d2372394c 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -741,22 +741,20 @@ void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params,
 static bool migrate_params_check(MigrationParameters *params, Error **errp)
 {
     if (params->has_compress_level &&
-        (params->compress_level < 0 || params->compress_level > 9)) {
+        (params->compress_level > 9)) {
         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level",
                    "is invalid, it should be in the range of 0 to 9");
         return false;
     }
 
-    if (params->has_compress_threads &&
-        (params->compress_threads < 1 || params->compress_threads > 255)) {
+    if (params->has_compress_threads && (params->compress_threads < 1)) {
         error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
                    "compress_threads",
                    "is invalid, it should be in the range of 1 to 255");
         return false;
     }
 
-    if (params->has_decompress_threads &&
-        (params->decompress_threads < 1 || params->decompress_threads > 255)) {
+    if (params->has_decompress_threads && (params->decompress_threads < 1)) {
         error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
                    "decompress_threads",
                    "is invalid, it should be in the range of 1 to 255");
@@ -781,38 +779,31 @@ static bool migrate_params_check(MigrationParameters *params, Error **errp)
         return false;
     }
 
-    if (params->has_max_bandwidth &&
-        (params->max_bandwidth < 0 || params->max_bandwidth > SIZE_MAX)) {
+    if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) {
         error_setg(errp, "Parameter 'max_bandwidth' expects an integer in the"
                          " range of 0 to %zu bytes/second", SIZE_MAX);
         return false;
     }
 
     if (params->has_downtime_limit &&
-        (params->downtime_limit < 0 ||
-         params->downtime_limit > MAX_MIGRATE_DOWNTIME)) {
+        (params->downtime_limit > MAX_MIGRATE_DOWNTIME)) {
         error_setg(errp, "Parameter 'downtime_limit' expects an integer in "
                          "the range of 0 to %d milliseconds",
                          MAX_MIGRATE_DOWNTIME);
         return false;
     }
 
-    if (params->has_x_checkpoint_delay && (params->x_checkpoint_delay < 0)) {
-        error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
-                    "x_checkpoint_delay",
-                    "is invalid, it should be positive");
-        return false;
-    }
-    if (params->has_x_multifd_channels &&
-        (params->x_multifd_channels < 1 || params->x_multifd_channels > 255)) {
+    /* x_checkpoint_delay is now always positive */
+
+    if (params->has_x_multifd_channels && (params->x_multifd_channels < 1)) {
         error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
                    "multifd_channels",
                    "is invalid, it should be in the range of 1 to 255");
         return false;
     }
     if (params->has_x_multifd_page_count &&
-            (params->x_multifd_page_count < 1 ||
-             params->x_multifd_page_count > 10000)) {
+        (params->x_multifd_page_count < 1 ||
+         params->x_multifd_page_count > 10000)) {
         error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
                    "multifd_page_count",
                    "is invalid, it should be in the range of 1 to 10000");
@@ -2394,33 +2385,33 @@ static Property migration_properties[] = {
                      send_section_footer, true),
 
     /* Migration parameters */
-    DEFINE_PROP_INT64("x-compress-level", MigrationState,
+    DEFINE_PROP_UINT8("x-compress-level", MigrationState,
                       parameters.compress_level,
                       DEFAULT_MIGRATE_COMPRESS_LEVEL),
-    DEFINE_PROP_INT64("x-compress-threads", MigrationState,
+    DEFINE_PROP_UINT8("x-compress-threads", MigrationState,
                       parameters.compress_threads,
                       DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT),
-    DEFINE_PROP_INT64("x-decompress-threads", MigrationState,
+    DEFINE_PROP_UINT8("x-decompress-threads", MigrationState,
                       parameters.decompress_threads,
                       DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT),
-    DEFINE_PROP_INT64("x-cpu-throttle-initial", MigrationState,
+    DEFINE_PROP_UINT8("x-cpu-throttle-initial", MigrationState,
                       parameters.cpu_throttle_initial,
                       DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL),
-    DEFINE_PROP_INT64("x-cpu-throttle-increment", MigrationState,
+    DEFINE_PROP_UINT8("x-cpu-throttle-increment", MigrationState,
                       parameters.cpu_throttle_increment,
                       DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT),
-    DEFINE_PROP_INT64("x-max-bandwidth", MigrationState,
+    DEFINE_PROP_SIZE("x-max-bandwidth", MigrationState,
                       parameters.max_bandwidth, MAX_THROTTLE),
-    DEFINE_PROP_INT64("x-downtime-limit", MigrationState,
+    DEFINE_PROP_UINT64("x-downtime-limit", MigrationState,
                       parameters.downtime_limit,
                       DEFAULT_MIGRATE_SET_DOWNTIME),
-    DEFINE_PROP_INT64("x-checkpoint-delay", MigrationState,
+    DEFINE_PROP_UINT32("x-checkpoint-delay", MigrationState,
                       parameters.x_checkpoint_delay,
                       DEFAULT_MIGRATE_X_CHECKPOINT_DELAY),
-    DEFINE_PROP_INT64("x-multifd-channels", MigrationState,
+    DEFINE_PROP_UINT8("x-multifd-channels", MigrationState,
                       parameters.x_multifd_channels,
                       DEFAULT_MIGRATE_MULTIFD_CHANNELS),
-    DEFINE_PROP_INT64("x-multifd-page-count", MigrationState,
+    DEFINE_PROP_UINT32("x-multifd-page-count", MigrationState,
                       parameters.x_multifd_page_count,
                       DEFAULT_MIGRATE_MULTIFD_PAGE_COUNT),
     DEFINE_PROP_SIZE("xbzrle-cache-size", MigrationState,
diff --git a/qapi/migration.json b/qapi/migration.json
index 03f57c9616..4cd3d13158 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -668,19 +668,19 @@
 # Since: 2.4
 ##
 { 'struct': 'MigrationParameters',
-  'data': { '*compress-level': 'int',
-            '*compress-threads': 'int',
-            '*decompress-threads': 'int',
-            '*cpu-throttle-initial': 'int',
-            '*cpu-throttle-increment': 'int',
+  'data': { '*compress-level': 'uint8',
+            '*compress-threads': 'uint8',
+            '*decompress-threads': 'uint8',
+            '*cpu-throttle-initial': 'uint8',
+            '*cpu-throttle-increment': 'uint8',
             '*tls-creds': 'str',
             '*tls-hostname': 'str',
-            '*max-bandwidth': 'int',
-            '*downtime-limit': 'int',
-            '*x-checkpoint-delay': 'int',
+            '*max-bandwidth': 'size',
+            '*downtime-limit': 'uint64',
+            '*x-checkpoint-delay': 'uint32',
             '*block-incremental': 'bool' ,
-            '*x-multifd-channels': 'int',
-            '*x-multifd-page-count': 'int',
+            '*x-multifd-channels': 'uint8',
+            '*x-multifd-page-count': 'uint32',
             '*xbzrle-cache-size': 'size' } }
 
 ##
