Hi,
On 23/05/18 10:38, Xu Zaibo wrote:
>> +static int vfio_iommu_bind_group(struct vfio_iommu *iommu,
>> + struct vfio_group *group,
>> + struct vfio_mm *vfio_mm)
>> +{
>> + int ret;
>> + bool enabled_sva = false;
>> + struct vfio_iommu_sva_bind_data data = {
>> + .vfio_mm = vfio_mm,
>> + .iommu = iommu,
>> + .count = 0,
>> + };
>> +
>> + if (!group->sva_enabled) {
>> + ret = iommu_group_for_each_dev(group->iommu_group, NULL,
>> + vfio_iommu_sva_init);
> Do we need to do *sva_init here or do anything to avoid repeated
> initiation?
> while another process already did initiation at this device, I think
> that current process will get an EEXIST.
Right, sva_init() must be called once for any device that intends to use
bind(). For the second process though, group->sva_enabled will be true
so we won't call sva_init() again, only bind().
Thanks,
Jean
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