Re: [PATCH 0/9] Initial DMABUF support for iommufd

On Fri, Nov 07, 2025 at 12:49:32PM -0400, Jason Gunthorpe wrote:

This is on github: https://github.com/jgunthorpe/linux/commits/iommufd_dmabuf

v2:

• Rebase on Leon's v7
• Fix mislocking in an iopt_fill_domain() error path

I have verified this v2 using the branch above, by drafting a QEMU patch for dmabuf on top of Shameer's vSMMU v5 series: https://github.com/nicolinc/qemu/commits/wip/iommufd_dmabuf/

With that, I see GPU BAR memory be correctly fetched in the QEMU: vfio_region_dmabuf Device 0009:01:00.0, region "0009:01:00.0 BAR 0", offset: 0x0, size: 0x1000000 vfio_region_dmabuf Device 0009:01:00.0, region "0009:01:00.0 BAR 2", offset: 0x0, size: 0x44f00000 vfio_region_dmabuf Device 0009:01:00.0, region "0009:01:00.0 BAR 4", offset: 0x0, size: 0x17a0000000

Tested-by: Nicolin Chen nicolinc@nvidia.com