Re: [PATCH RFC] uaccess: user_access_begin_after_access_ok()

[Jason Wang]

On 2020/6/5 äå12:49, Michael S. Tsirkin wrote:
> > > 2. Second argument to translate_desc is a GPA, isn't it?
> > No, it's IOVA, this function will be called only when IOTLB is enabled.
> >
> > Thanks
> Right IOVA. Point stands how does it make sense to cast
> a userspace pointer to an IOVA? I guess it's just
> because it's talking to qemu actually, so it's abusing
> the notation a bit ...

Yes, but the issues are:

1) VHOST_SET_VRING_ADDR is used for iotlb and !iotlb
2) so did the memory accessors

Unless we differ separate IOTLB datapath out, there's probably not easy 
to have another notation.

Thanks