diff options
| author | Zhenzhong Duan <zhenzhong.duan@intel.com> | 2024-06-05 16:30:32 +0800 |
|---|---|---|
| committer | Cédric Le Goater <clg@redhat.com> | 2024-06-24 23:15:30 +0200 |
| commit | d441e05e26033eb0e49c4185293424a480ef750f (patch) | |
| tree | 161736c20c432f0cb75030d3128867d4571706dc | |
| parent | 6f274444c579305d14d355bab24af31ea2bef224 (diff) | |
vfio/container: Implement HostIOMMUDeviceClass::realize() handler
The realize function populates the capabilities. For now only the
aw_bits caps is computed for legacy backend.
Introduce a helper function vfio_device_get_aw_bits() which calls
range_get_last_bit() to get host aw_bits and package it in
HostIOMMUDeviceCaps for query with .get_cap(). This helper will
also be used by iommufd backend.
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | hw/vfio/container.c | 19 | ||||
| -rw-r--r-- | hw/vfio/helpers.c | 17 | ||||
| -rw-r--r-- | include/hw/vfio/vfio-common.h | 1 |
3 files changed, 37 insertions, 0 deletions
diff --git a/hw/vfio/container.c b/hw/vfio/container.c index c4fca2dfca..2f62c13214 100644 --- a/hw/vfio/container.c +++ b/hw/vfio/container.c @@ -1136,6 +1136,24 @@ static void vfio_iommu_legacy_class_init(ObjectClass *klass, void *data) vioc->pci_hot_reset = vfio_legacy_pci_hot_reset; }; +static bool hiod_legacy_vfio_realize(HostIOMMUDevice *hiod, void *opaque, + Error **errp) +{ + VFIODevice *vdev = opaque; + + hiod->name = g_strdup(vdev->name); + hiod->caps.aw_bits = vfio_device_get_aw_bits(vdev); + + return true; +} + +static void hiod_legacy_vfio_class_init(ObjectClass *oc, void *data) +{ + HostIOMMUDeviceClass *hioc = HOST_IOMMU_DEVICE_CLASS(oc); + + hioc->realize = hiod_legacy_vfio_realize; +}; + static const TypeInfo types[] = { { .name = TYPE_VFIO_IOMMU_LEGACY, @@ -1144,6 +1162,7 @@ static const TypeInfo types[] = { }, { .name = TYPE_HOST_IOMMU_DEVICE_LEGACY_VFIO, .parent = TYPE_HOST_IOMMU_DEVICE, + .class_init = hiod_legacy_vfio_class_init, } }; diff --git a/hw/vfio/helpers.c b/hw/vfio/helpers.c index 27ea26aa48..b14edd46ed 100644 --- a/hw/vfio/helpers.c +++ b/hw/vfio/helpers.c @@ -658,3 +658,20 @@ void vfio_device_init(VFIODevice *vbasedev, int type, VFIODeviceOps *ops, vbasedev->ram_block_discard_allowed = ram_discard; } + +int vfio_device_get_aw_bits(VFIODevice *vdev) +{ + /* + * iova_ranges is a sorted list. For old kernels that support + * VFIO but not support query of iova ranges, iova_ranges is NULL, + * in this case HOST_IOMMU_DEVICE_CAP_AW_BITS_MAX(64) is returned. + */ + GList *l = g_list_last(vdev->bcontainer->iova_ranges); + + if (l) { + Range *range = l->data; + return range_get_last_bit(range) + 1; + } + + return HOST_IOMMU_DEVICE_CAP_AW_BITS_MAX; +} diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index 56d1717211..105b8b7e80 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -289,4 +289,5 @@ bool vfio_device_get_name(VFIODevice *vbasedev, Error **errp); void vfio_device_set_fd(VFIODevice *vbasedev, const char *str, Error **errp); void vfio_device_init(VFIODevice *vbasedev, int type, VFIODeviceOps *ops, DeviceState *dev, bool ram_discard); +int vfio_device_get_aw_bits(VFIODevice *vdev); #endif /* HW_VFIO_VFIO_COMMON_H */ |