linux-kernel - [PATCH v8 5/5] vfio: update live migration device status

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Message-ID: <20230217084831.35783-6-liulongfang@huawei.com>
Date:   Fri, 17 Feb 2023 16:48:31 +0800
From:   Longfang Liu <liulongfang@...wei.com>
To:     <alex.williamson@...hat.com>, <jgg@...dia.com>,
        <shameerali.kolothum.thodi@...wei.com>,
        <jonathan.cameron@...wei.com>
CC:     <cohuck@...hat.com>, <linux-kernel@...r.kernel.org>,
        <linuxarm@...neuler.org>, <liulongfang@...wei.com>
Subject: [PATCH v8 5/5] vfio: update live migration device status

migration debugfs needs to perform debug operations based on the
status of the current device. If the device is not loaded or has
stopped, debugfs does not allow operations.

so, after the live migration function is executed and the device is
turned off, the device no longer needs to be accessed. At this time,
the status of the device needs to be set to stop.

Signed-off-by: Longfang Liu <liulongfang@...wei.com>
---
 drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c | 3 +++
 drivers/vfio/pci/mlx5/main.c                   | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
index a0ecb1cd5707..ec73e8b19c89 100644
--- a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
+++ b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
@@ -1607,6 +1607,9 @@ static void hisi_acc_vfio_pci_close_device(struct vfio_device *core_vdev)
 	struct hisi_acc_vf_core_device *hisi_acc_vdev = hisi_acc_get_vf_dev(core_vdev);
 	struct hisi_qm *vf_qm = &hisi_acc_vdev->vf_qm;
 
+	if (core_vdev->mig_ops)
+		hisi_acc_vdev->mig_state = VFIO_DEVICE_STATE_STOP;
+
 	iounmap(vf_qm->io_base);
 	vfio_pci_core_close_device(core_vdev);
 }
diff --git a/drivers/vfio/pci/mlx5/main.c b/drivers/vfio/pci/mlx5/main.c
index e897537a9e8a..dc3564436946 100644
--- a/drivers/vfio/pci/mlx5/main.c
+++ b/drivers/vfio/pci/mlx5/main.c
@@ -1269,6 +1269,9 @@ static void mlx5vf_pci_close_device(struct vfio_device *core_vdev)
 	struct mlx5vf_pci_core_device *mvdev = container_of(
 		core_vdev, struct mlx5vf_pci_core_device, core_device.vdev);
 
+	if (mvdev->migrate_cap)
+		mvdev->mig_state = VFIO_DEVICE_STATE_STOP;
+
 	mlx5vf_cmd_close_migratable(mvdev);
 	vfio_pci_core_close_device(core_vdev);
 }
-- 
2.24.0