From: Jason Gunthorpe <jgg@nvidia.com>
To: Matt Evans <mattev@meta.com>
Cc: "Alex Williamson" <alex@shazbot.org>,
"Leon Romanovsky" <leon@kernel.org>,
"Alex Mastro" <amastro@fb.com>,
"Christian König" <christian.koenig@amd.com>,
"Mahmoud Adam" <mngyadam@amazon.de>,
"David Matlack" <dmatlack@google.com>,
"Björn Töpel" <bjorn@kernel.org>,
"Sumit Semwal" <sumit.semwal@linaro.org>,
"Kevin Tian" <kevin.tian@intel.com>,
"Ankit Agrawal" <ankita@nvidia.com>,
"Pranjal Shrivastava" <praan@google.com>,
"Alistair Popple" <apopple@nvidia.com>,
"Vivek Kasireddy" <vivek.kasireddy@intel.com>,
linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org,
kvm@vger.kernel.org
Subject: Re: [PATCH 5/9] vfio/pci: Provide a user-facing name for BAR mappings
Date: Fri, 24 Apr 2026 15:26:12 -0300 [thread overview]
Message-ID: <20260424182612.GH3444440@nvidia.com> (raw)
In-Reply-To: <20260416131815.2729131-6-mattev@meta.com>
On Thu, Apr 16, 2026 at 06:17:48AM -0700, Matt Evans wrote:
> 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 <mattev@meta.com>
> ---
> drivers/vfio/pci/vfio_pci_dmabuf.c | 27 +++++++++++++++++++++++++--
> 1 file changed, 25 insertions(+), 2 deletions(-)
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Jason
next prev parent reply other threads:[~2026-04-24 18:26 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-16 13:17 [PATCH 0/9] vfio/pci: Add mmap() for DMABUFs Matt Evans
2026-04-16 13:17 ` [PATCH 1/9] vfio/pci: Fix vfio_pci_dma_buf_cleanup() double-put Matt Evans
2026-04-24 18:05 ` Jason Gunthorpe
2026-04-16 13:17 ` [PATCH 2/9] vfio/pci: Add a helper to look up PFNs for DMABUFs Matt Evans
2026-04-24 18:15 ` Jason Gunthorpe
2026-04-16 13:17 ` [PATCH 3/9] vfio/pci: Add a helper to create a DMABUF for a BAR-map VMA Matt Evans
2026-04-24 18:24 ` Jason Gunthorpe
2026-04-16 13:17 ` [PATCH 4/9] vfio/pci: Convert BAR mmap() to use a DMABUF Matt Evans
2026-04-16 13:17 ` [PATCH 5/9] vfio/pci: Provide a user-facing name for BAR mappings Matt Evans
2026-04-24 18:26 ` Jason Gunthorpe [this message]
2026-04-16 13:17 ` [PATCH 6/9] vfio/pci: Clean up BAR zap and revocation Matt Evans
2026-04-16 13:17 ` [PATCH 7/9] vfio/pci: Support mmap() of a VFIO DMABUF Matt Evans
2026-04-24 18:30 ` Jason Gunthorpe
2026-04-16 13:17 ` [PATCH 8/9] vfio/pci: Permanently revoke a DMABUF on request Matt Evans
2026-04-16 13:17 ` [PATCH 9/9] vfio/pci: Add mmap() attributes to DMABUF feature Matt Evans
2026-04-24 18:31 ` Jason Gunthorpe
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