Re: [PATCH] swiotlb: Validate bounce size in the sync/unmap path
From: Christoph Hellwig <hch@lst.de>
Date: 2021-02-09 08:27:54
Also in:
kvm, linux-iommu, lkml
On Mon, Feb 08, 2021 at 12:14:49PM -0500, Konrad Rzeszutek Wilk wrote:
quoted
ring buffer or whatever because you know I/O will be copied anyway and none of all the hard work higher layers do to make the I/O suitable for a normal device apply.I lost you here. Sorry, are you saying have a simple ring protocol (like NVME has), where the ring entries (SG or DMA phys) are statically allocated and whenever NVME driver gets data from user-space it would copy it in there?
Yes. Basically extend the virtio or NVMe ring/queue concept to not just cover commands and completions, but also the data transfers. _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization