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iommufd/viommu: Explicitly define vdev->virt_id

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The "id" is too general to get its meaning easily. Rename it explicitly to
"virt_id" and update the kdocs for readability. No functional changes.

Link: https://patch.msgid.link/r/1fac22d645e6ee555675726faf3798a68315b044.1752126748.git.nicolinc@nvidia.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Pranjal Shrivastava <praan@google.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Nicolin Chen 2025-07-09 22:58:55 -07:00 committed by Jason Gunthorpe
parent fca02263f2
commit c50a5de2c4
3 changed files with 9 additions and 4 deletions
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2
drivers/iommu/iommufd/driver.c
View File

@ -30,7 +30,7 @@ int iommufd_viommu_get_vdev_id(struct iommufd_viommu *viommu,
xa_lock(&viommu->vdevs);
xa_for_each(&viommu->vdevs, index, vdev) {
if (vdev->dev == dev) {
*vdev_id = vdev->id;
*vdev_id = vdev->virt_id;
rc = 0;
break;
}

7
drivers/iommu/iommufd/iommufd_private.h
View File

@ -634,7 +634,12 @@ struct iommufd_vdevice {
struct iommufd_object obj;
struct iommufd_viommu *viommu;
struct device *dev;
u64 id; /* per-vIOMMU virtual ID */
/*
* Virtual device ID per vIOMMU, e.g. vSID of ARM SMMUv3, vDeviceID of
* AMD IOMMU, and vRID of Intel VT-d
*/
u64 virt_id;
};
#ifdef CONFIG_IOMMUFD_TEST

4
drivers/iommu/iommufd/viommu.c
View File

@ -111,7 +111,7 @@ void iommufd_vdevice_destroy(struct iommufd_object *obj)
struct iommufd_viommu *viommu = vdev->viommu;
/* xa_cmpxchg is okay to fail if alloc failed xa_cmpxchg previously */
xa_cmpxchg(&viommu->vdevs, vdev->id, vdev, NULL, GFP_KERNEL);
xa_cmpxchg(&viommu->vdevs, vdev->virt_id, vdev, NULL, GFP_KERNEL);
refcount_dec(&viommu->obj.users);
put_device(vdev->dev);
}
@ -150,7 +150,7 @@ int iommufd_vdevice_alloc_ioctl(struct iommufd_ucmd *ucmd)
goto out_put_idev;
}
vdev->id = virt_id;
vdev->virt_id = virt_id;
vdev->dev = idev->dev;
get_device(idev->dev);
vdev->viommu = viommu;