> Subject: Re: [Patch v4 0/3] Introduce a driver to support host accelerated > access to Microsoft Azure Blob > > On Mon, Jul 19, 2021 at 09:37:56PM -0700, Bart Van Assche wrote: > > such that this object storage driver can be implemented as a > > user-space library instead of as a kernel driver? As you may know vfio > > users can either use eventfds for completion notifications or polling. > > An interface like io_uring can be built easily on top of vfio. > > Yes. Similar to say the NVMe K/V command set this does not look like a > candidate for a kernel driver. The driver is modeled to support multiple processes/users over a VMBUS channel. I don't see a way that this can be implemented through VFIO? Even if it can be done, this exposes a security risk as the same VMBUS channel is shared by multiple processes in user-mode.
