Re: [RFC v2 1/2] vfio: add callback to get tph info for dmabuf
From: Leon Romanovsky <leon@kernel.org>
Date: 2026-03-31 19:02:30
Also in:
dri-devel, linux-pci, linux-rdma
Possibly related (same subject, not in this thread)
- 2026-03-31 · Re: [RFC v2 1/2] vfio: add callback to get tph info for dmabuf · Zhiping Zhang <hidden>
- 2026-03-28 · Re: [RFC v2 1/2] vfio: add callback to get tph info for dmabuf · fengchengwen <hidden>
On Tue, Mar 31, 2026 at 08:13:58AM -0600, Keith Busch wrote:
On Tue, Mar 31, 2026 at 05:03:09PM +0300, Leon Romanovsky wrote:quoted
I understand, my proposal is always set TPH flag when new struct is used.An existing application recompiled against the new kernel api implicitly uses the new struct layout without setting the TPH flag, so kernel and application are out of sync on where dma_ranges exists with your proposal.
Right, what about adding TPH fields to struct vfio_region_dma_range instead of struct vfio_device_feature_dma_buf? Thanks