RE: [PATCH 4/5] misc: vop: set VIRTIO_F_ACCESS_PLATFORM for nocoherent platform

[Sherry Sun]

Hi Christoph,

> On Fri, Sep 25, 2020 at 03:26:29PM +0800, Sherry Sun wrote:
> > Set VIRTIO_F_ACCESS_PLATFORM feature for nocoherent platform, since it
> > needs the DMA API for virtio.
> 
> Given that VOP is a plug-in PCIe card VIRTIO_F_ACCESS_PLATFORM must
> always be set, as the DMA mapping details are not something the virtio
> implementation decides on, but the host PCIe/iommu implementation.

So do you mean that we should remove the check, and set VIRTIO_F_ACCESS_PLATFORM feature directly?

Regards
Sherry