From: Keith Busch <kbusch@kernel.org>
To: Leon Romanovsky <leon@kernel.org>
Cc: Zhiping Zhang <zhipingz@meta.com>, Jason Gunthorpe <jgg@ziepe.ca>,
Bjorn Helgaas <bhelgaas@google.com>,
linux-rdma@vger.kernel.org, linux-pci@vger.kernel.org,
netdev@vger.kernel.org, dri-devel@lists.freedesktop.org,
Yochai Cohen <yochai@nvidia.com>,
Yishai Hadas <yishaih@nvidia.com>,
Bjorn Helgaas <helgaas@kernel.org>
Subject: Re: [RFC v2 1/2] vfio: add callback to get tph info for dmabuf
Date: Tue, 14 Apr 2026 11:34:14 -0600 [thread overview]
Message-ID: <ad56liSM4zI2SWWp@kbusch-mbp> (raw)
In-Reply-To: <20260409120415.GF86584@unreal>
On Thu, Apr 09, 2026 at 03:04:15PM +0300, Leon Romanovsky wrote:
> Something like that, on top of this proposal:
...
> +struct vfio_region_dma_tph {
> + u16 tag;
> + u8 ph;
> +};
> +
> struct vfio_region_dma_range {
> - __u64 offset;
> - __u64 length;
> + union {
> + __u64 offset;
> + struct vfio_region_dma_tph tph;
> + };
> + union {
> + __u64 length;
> + __u64 reserved;
> + };
> +};
> +
> +enum {
> + VFIO_DMABUF_FLAG_TPH = 1 << 0,
> };
Okay, so you have the hints as a separate action from the dmabuf
creation. I was trying to set it up in one shot, but this proposal may
be fine. We'll try this idea out internally.
next prev parent reply other threads:[~2026-04-14 17:34 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20260324234615.3731237-1-zhipingz@meta.com>
[not found] ` <20260324234615.3731237-2-zhipingz@meta.com>
2026-03-25 8:25 ` [RFC v2 1/2] vfio: add callback to get tph info for dmabuf Leon Romanovsky
2026-03-26 22:41 ` Keith Busch
2026-03-26 22:55 ` Zhiping Zhang
2026-03-31 8:39 ` Leon Romanovsky
2026-03-31 8:37 ` Leon Romanovsky
2026-03-31 13:00 ` Keith Busch
2026-03-31 13:29 ` Leon Romanovsky
2026-03-31 13:35 ` Keith Busch
2026-03-31 14:03 ` Leon Romanovsky
2026-03-31 14:13 ` Keith Busch
2026-03-31 19:02 ` Leon Romanovsky
2026-03-31 19:44 ` Keith Busch
2026-04-09 12:04 ` Leon Romanovsky
2026-04-13 18:32 ` Zhiping Zhang
2026-04-13 19:23 ` Leon Romanovsky
2026-04-14 17:34 ` Keith Busch [this message]
2026-03-28 2:21 ` fengchengwen
2026-03-31 0:49 ` Zhiping Zhang
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