Re: [RFC 0/4] Virtio uses DMA API for all devices
From: Christoph Hellwig <hch@infradead.org>
Date: 2018-08-03 07:06:38
On Thu, Aug 02, 2018 at 11:53:08PM +0300, Michael S. Tsirkin wrote:
quoted
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.