RE: [PATCH v3 5/9] vfio/pci: Provide a user-facing name for BAR mappings

[Tian, Kevin]

> From: Matt Evans <matt@xxxxxxxxxx>
> Sent: Wednesday, June 10, 2026 11:43 PM
> 
> Since converting BAR mmap()s to using DMABUFs, we lose the original
> device path in /proc/<pid>/maps, lsof, etc.  Generate a debug-oriented
> synthetic 'filename' based on the cdev, plus BDF, plus resource index.
> 
> This applies only to BAR mappings via the VFIO device fd, as
> explicitly-exported DMABUFs are named by userspace via the
> DMA_BUF_SET_NAME ioctl.
> 
> Signed-off-by: Matt Evans <matt@xxxxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>