From 8118349b1bc5c12e4017ddd7eb563fce752a5a9c Mon Sep 17 00:00:00 2001 From: Avihai Horon Date: Wed, 6 Sep 2023 18:08:49 +0300 Subject: [PATCH] vfio/migration: Fail adding device with enable-migration=on and existing blocker MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit If a device with enable-migration=on is added and it causes a migration blocker, adding the device should fail with a proper error. This is not the case with multiple device migration blocker when the blocker already exists. If the blocker already exists and a device with enable-migration=on is added which causes a migration blocker, adding the device will succeed. Fix it by failing adding the device in such case. Fixes: 8bbcb64a71d8 ("vfio/migration: Make VFIO migration non-experimental") Signed-off-by: Avihai Horon Reviewed-by: Cédric Le Goater Signed-off-by: Cédric Le Goater --- hw/vfio/common.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 8a8d074e186..237101d0384 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -394,8 +394,7 @@ int vfio_block_multiple_devices_migration(VFIODevice *vbasedev, Error **errp) { int ret; - if (multiple_devices_migration_blocker || - vfio_multiple_devices_migration_is_supported()) { + if (vfio_multiple_devices_migration_is_supported()) { return 0; } @@ -405,6 +404,10 @@ int vfio_block_multiple_devices_migration(VFIODevice *vbasedev, Error **errp) return -EINVAL; } + if (multiple_devices_migration_blocker) { + return 0; + } + error_setg(&multiple_devices_migration_blocker, "Multiple VFIO devices migration is supported only if all of " "them support P2P migration"); -- 2.39.5