From: Liu Yi L <yi.l.liu@xxxxxxxxx>
This patch adds VFIO pasid alloc/free support to allow host intercept
in PASID allocation for VM by adding VFIO implementation of
DualStageIOMMUOps.pasid_alloc/free callbacks.
Cc: Kevin Tian <kevin.tian@xxxxxxxxx>
Cc: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Eric Auger <eric.auger@xxxxxxxxxx>
Cc: Yi Sun <yi.y.sun@xxxxxxxxxxxxxxx>
Cc: David Gibson <david@xxxxxxxxxxxxxxxxxxxxx>
Cc: Alex Williamson <alex.williamson@xxxxxxxxxx>
Signed-off-by: Liu Yi L <yi.l.liu@xxxxxxxxx>
---
hw/vfio/common.c | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index a07824b..014f4e7 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -1179,7 +1179,49 @@ static int vfio_get_iommu_type(VFIOContainer *container,
return -EINVAL;
}
+static int vfio_ds_iommu_pasid_alloc(DualStageIOMMUObject *dsi_obj,
+ uint32_t min, uint32_t max, uint32_t *pasid)
+{
+ VFIOContainer *container = container_of(dsi_obj, VFIOContainer, dsi_obj);
+ struct vfio_iommu_type1_pasid_request req;
+ unsigned long argsz;
+
+ argsz = sizeof(req);
+ req.argsz = argsz;
+ req.flags = VFIO_IOMMU_PASID_ALLOC;
+ req.alloc_pasid.min = min;
+ req.alloc_pasid.max = max;
+
+ if (ioctl(container->fd, VFIO_IOMMU_PASID_REQUEST, &req)) {
+ error_report("%s: %d, alloc failed", __func__, -errno);
+ return -errno;
+ }
+ *pasid = req.alloc_pasid.result;
+ return 0;
+}
+
+static int vfio_ds_iommu_pasid_free(DualStageIOMMUObject *dsi_obj,
+ uint32_t pasid)
+{
+ VFIOContainer *container = container_of(dsi_obj, VFIOContainer, dsi_obj);
+ struct vfio_iommu_type1_pasid_request req;
+ unsigned long argsz;
+
+ argsz = sizeof(req);
+ req.argsz = argsz;
+ req.flags = VFIO_IOMMU_PASID_FREE;
+ req.free_pasid = pasid;
+
+ if (ioctl(container->fd, VFIO_IOMMU_PASID_REQUEST, &req)) {
+ error_report("%s: %d, free failed", __func__, -errno);
+ return -errno;
+ }
+ return 0;
+}
+
static struct DualStageIOMMUOps vfio_ds_iommu_ops = {
+ .pasid_alloc = vfio_ds_iommu_pasid_alloc,
+ .pasid_free = vfio_ds_iommu_pasid_free,
};
static int vfio_get_iommu_info(VFIOContainer *container,
--
2.7.4
