diff options
| author | Joao Martins | 2023-10-24 14:50:59 +0100 |
|---|---|---|
| committer | Jason Gunthorpe | 2023-10-24 11:58:43 -0300 |
| commit | 7623683857e52b75184d37862c70f1230aef2edd (patch) | |
| tree | 879b09e37d229f1b6c507648920ca0bdb82025b8 /drivers/iommu | |
| parent | b9a60d6f850e4470017b60f731220a58cda199aa (diff) | |
iommufd: Add capabilities to IOMMU_GET_HW_INFO
Extend IOMMUFD_CMD_GET_HW_INFO op to query generic iommu capabilities for a
given device.
Capabilities are IOMMU agnostic and use device_iommu_capable() API passing
one of the IOMMU_CAP_*. Enumerate IOMMU_CAP_DIRTY_TRACKING for now in the
out_capabilities field returned back to userspace.
Link: https://lore.kernel.org/r/20231024135109.73787-9-joao.m.martins@oracle.com
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/iommufd/device.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index e88fa73a45e6..2a41fd2b6ef8 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -1185,6 +1185,10 @@ int iommufd_get_hw_info(struct iommufd_ucmd *ucmd) */ cmd->data_len = data_len; + cmd->out_capabilities = 0; + if (device_iommu_capable(idev->dev, IOMMU_CAP_DIRTY_TRACKING)) + cmd->out_capabilities |= IOMMU_HW_CAP_DIRTY_TRACKING; + rc = iommufd_ucmd_respond(ucmd, sizeof(*cmd)); out_free: kfree(data); |