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Wed, 6 Sep 2023 08:08:59 -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 v3 2/6] vfio/migration: Fail adding device with enable-migration=on and existing blocker Date: Wed, 6 Sep 2023 18:08:49 +0300 Message-ID: <20230906150853.22176-3-avihaih@nvidia.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20230906150853.22176-1-avihaih@nvidia.com> References: <20230906150853.22176-1-avihaih@nvidia.com> MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF0001AB4F:EE_|DM6PR12MB4060:EE_ X-MS-Office365-Filtering-Correlation-Id: be8c7b9b-d251-4f02-c053-08dbaeeb3cd8 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:216.228.117.161; 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envelope-from=avihaih@nvidia.com; helo=NAM12-MW2-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");