On 3/8/23 18:56, Lu Baolu wrote:
The iommu subsystem requires IOMMU_DEV_FEAT_IOPF must be enabled before and disabled after IOMMU_DEV_FEAT_SVA, if device's I/O page faults rely on the IOMMU. Add explicit IOMMU_DEV_FEAT_IOPF enabling/disabling in this driver. At present, missing IOPF enabling/disabling doesn't cause any real issue, because the IOMMU driver places the IOPF enabling/disabling in the path of SVA feature handling. But this may change. Reviewed-by: Dave Jiang <dave.jiang@xxxxxxxxx> Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
Reviewed-by: Fenghua Yu <fenghua.yu@xxxxxxxxx> Thanks. -Fenghua
