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Mon, 28 Aug 2023 08:18:48 -0700 From: Avihai Horon To: CC: Alex Williamson , =?utf-8?q?C=C3=A9dric_Le_G?= =?utf-8?q?oater?= , Juan Quintela , Peter Xu , Leonardo Bras , Yanghang Liu , Avihai Horon Subject: [PATCH 2/6] vfio/migration: Fail adding device with enable-migration=on and existing blocker Date: Mon, 28 Aug 2023 18:18:38 +0300 Message-ID: <20230828151842.11303-3-avihaih@nvidia.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20230828151842.11303-1-avihaih@nvidia.com> References: <20230828151842.11303-1-avihaih@nvidia.com> MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000EE3B:EE_|LV3PR12MB9266:EE_ X-MS-Office365-Filtering-Correlation-Id: ea4fe5ac-b258-4c78-dbf2-08dba7da1a5f 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:216.228.118.233; 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envelope-from=avihaih@nvidia.com; helo=NAM10-DM6-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, 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: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org 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 --- 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 8a8d074e18..237101d038 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");