[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [PATCH 13/13] HV/Storvsc: Add Isolation VM support for storvsc driver

On Wed, Jul 28, 2021 at 10:52:28AM -0400, Tianyu Lan wrote:
> In Isolation VM, all shared memory with host needs to mark visible
> to host via hvcall. vmbus_establish_gpadl() has already done it for
> storvsc rx/tx ring buffer. The page buffer used by vmbus_sendpacket_
> mpb_desc() still need to handle. Use DMA API to map/umap these
> memory during sending/receiving packet and Hyper-V DMA ops callback
> will use swiotlb function to allocate bounce buffer and copy data
> from/to bounce buffer.

I am wondering why you dont't use DMA-API unconditionally? It provides
enough abstraction to do the right thing for isolated and legacy VMs.





Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.