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.
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 --- drivers/iommu/iommufd/iommufd_private.h | 7 ++++++- drivers/iommu/iommufd/driver.c | 2 +- drivers/iommu/iommufd/viommu.c | 4 ++-- 3 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/iommu/iommufd/iommufd_private.h b/drivers/iommu/iommufd/iommufd_private.h index 4f5e8cd99c96..320635a177b7 100644 --- a/drivers/iommu/iommufd/iommufd_private.h +++ b/drivers/iommu/iommufd/iommufd_private.h @@ -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 diff --git a/drivers/iommu/iommufd/driver.c b/drivers/iommu/iommufd/driver.c index 2fee399a148e..887719016804 100644 --- a/drivers/iommu/iommufd/driver.c +++ b/drivers/iommu/iommufd/driver.c @@ -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; } diff --git a/drivers/iommu/iommufd/viommu.c b/drivers/iommu/iommufd/viommu.c index 25ac08fbb52a..bc8796e6684e 100644 --- a/drivers/iommu/iommufd/viommu.c +++ b/drivers/iommu/iommufd/viommu.c @@ -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;