Re: [RFC 0/4] Virtio uses DMA API for all devices
From: Christoph Hellwig
Date: Fri Aug 03 2018 - 03:06:44 EST
On Thu, Aug 02, 2018 at 11:53:08PM +0300, Michael S. Tsirkin wrote:
> > We don't need cache flushing tricks.
>
> You don't but do real devices on same platform need them?
IBMs power plaforms are always cache coherent. There are some powerpc
platforms have not cache coherent DMA, but I guess this scheme isn't
intended for them.