[RFC PATCH v3 10/15] hw/arm/smmuv3-accel: Allocate a vDEVICE object for device

[Shameer Kolothum via]

From: Nicolin Chen <nicol...@nvidia.com>

Allocate and associate a vDEVICE object for the Guest device
with the vIOMMU. This will help the kernel to do the
vSID --> sid translation whenever required (eg: device specific
invalidations).

Signed-off-by: Nicolin Chen <nicol...@nvidia.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.th...@huawei.com>
---
 hw/arm/smmuv3-accel.c    | 25 +++++++++++++++++++++++++
 hw/arm/smmuv3-accel.h    |  1 +
 include/system/iommufd.h |  5 +++++
 3 files changed, 31 insertions(+)

diff --git a/hw/arm/smmuv3-accel.c b/hw/arm/smmuv3-accel.c
index 74bf20cfaf..f1584dd775 100644
--- a/hw/arm/smmuv3-accel.c
+++ b/hw/arm/smmuv3-accel.c
@@ -93,6 +93,23 @@ void smmuv3_accel_install_nested_ste(SMMUState *bs, 
SMMUDevice *sdev, int sid)
         return;
     }
 
+    if (!accel_dev->vdev && accel_dev->idev) {
+        IOMMUFDVdev *vdev;
+        uint32_t vdev_id;
+        SMMUViommu *viommu = accel_dev->viommu;
+
+        iommufd_backend_alloc_vdev(viommu->core.iommufd, 
accel_dev->idev->devid,
+                                   viommu->core.viommu_id, sid, &vdev_id,
+                                   &error_abort);
+        vdev = g_new(IOMMUFDVdev, 1);
+        vdev->vdev_id = vdev_id;
+        vdev->dev_id = sid;
+        accel_dev->vdev = vdev;
+        host_iommu_device_iommufd_attach_hwpt(accel_dev->idev,
+                                              
accel_dev->viommu->bypass_hwpt_id,
+                                              &error_abort);
+    }
+
     ret = smmu_find_ste(sdev->smmu, sid, &ste, &event);
     if (ret) {
         error_report("failed to find STE for sid 0x%x", sid);
@@ -287,6 +304,7 @@ static void smmuv3_accel_unset_iommu_device(PCIBus *bus, 
void *opaque,
     SMMUPciBus *sbus = g_hash_table_lookup(bs->smmu_pcibus_by_busptr, bus);
     SMMUv3AccelDevice *accel_dev;
     SMMUViommu *viommu;
+    IOMMUFDVdev *vdev;
     SMMUDevice *sdev;
 
     if (!sbus) {
@@ -310,6 +328,13 @@ static void smmuv3_accel_unset_iommu_device(PCIBus *bus, 
void *opaque,
     trace_smmuv3_accel_unset_iommu_device(devfn, smmu_get_sid(sdev));
 
     viommu = s->s_accel->viommu;
+    vdev = accel_dev->vdev;
+    if (vdev) {
+        iommufd_backend_free_id(viommu->iommufd, vdev->vdev_id);
+        g_free(vdev);
+        accel_dev->vdev = NULL;
+    }
+
     if (QLIST_EMPTY(&viommu->device_list)) {
         iommufd_backend_free_id(viommu->iommufd, viommu->bypass_hwpt_id);
         iommufd_backend_free_id(viommu->iommufd, viommu->abort_hwpt_id);
diff --git a/hw/arm/smmuv3-accel.h b/hw/arm/smmuv3-accel.h
index 06e81b630d..21028e60c8 100644
--- a/hw/arm/smmuv3-accel.h
+++ b/hw/arm/smmuv3-accel.h
@@ -40,6 +40,7 @@ typedef struct SMMUv3AccelDevice {
     HostIOMMUDeviceIOMMUFD *idev;
     SMMUS1Hwpt  *s1_hwpt;
     SMMUViommu *viommu;
+    IOMMUFDVdev  *vdev;
     QLIST_ENTRY(SMMUv3AccelDevice) next;
 } SMMUv3AccelDevice;
 
diff --git a/include/system/iommufd.h b/include/system/iommufd.h
index b7ad2cf10c..8de559d448 100644
--- a/include/system/iommufd.h
+++ b/include/system/iommufd.h
@@ -44,6 +44,11 @@ typedef struct IOMMUFDViommu {
     uint32_t viommu_id;
 } IOMMUFDViommu;
 
+typedef struct IOMMUFDVdev {
+    uint32_t vdev_id;
+    uint32_t dev_id;
+} IOMMUFDVdev;
+
 bool iommufd_backend_connect(IOMMUFDBackend *be, Error **errp);
 void iommufd_backend_disconnect(IOMMUFDBackend *be);
 
-- 
2.34.1