[PATCH v3 0/7] Rework device probing

[Morten Brørup]

Is there a workaround until this patch is added, if I don't want rte_eal_init() to probe any devices, but I want my application to probe devices later by calling rte_bus_scan() followed by rte_bus_probe()?

It's not something we really need, so if you don't know it off the top of your head, don't spend time trying to figure it out.


Venlig hilsen / Kind regards,
-Morten Brørup

> -----Original Message-----
> From: David Marchand [mailto:david.marchand at redhat.com]
> Sent: Tuesday, 7 April 2026 13.52
> To: dev at dpdk.org
> Subject: [PATCH v3 0/7] Rework device probing
> 
> Applications relying on device hotplug don't work well with the default
> probing of all available resources.
> This series proposes to change this behavior via a new EAL option.
> 
> 
> --
> David Marchand
> 
> Changes since v2:
> - rebased for late 26.03 fslmc bus changes,
> - fixed devargs lookup,
> - added debug logs,
> 
> Changes since v1:
> - restored per bus scan mode,
> - fixed logic in device selection for dma/idxd,
> - fixed raw/ifpga hotplug on ifpga bus,
> - fixed some doxygen,
> 
> Changes since RFC v3:
> - removed per bus scan mode,
> 
> Changes since RFC v2:
> - went one step further and reworked devargs lookup in buses following
>   Bruce comment (see patch 4 which is cosmetic, and patch 5),
> - updated device selection helper accordingly and
>   changed API to be device name based,
> - renamed option, added check on -b presence, updated doc in the last
>   patch,
> 
> Changes since RFC v1:
> - reviewed bus probe() and cleaned up NXP drivers,
> - changed approach following Bruce comment,
> 
> David Marchand (7):
>   devtools: check packet forwarding in null test
>   bus/fslmc: fix bus cleanup
>   drivers/bus: require probe function for NXP drivers
>   drivers/bus: cleanup devargs lookup in scan
>   bus: factorize devargs lookup
>   bus: factorize device selection
>   eal: configure initial device probing
> 
>  app/test/test_eal_flags.c                    | 63 ++++++++++++++++
>  devtools/test-null.sh                        | 10 ++-
>  doc/guides/linux_gsg/eal_args.include.rst    | 13 ++++
>  drivers/bus/auxiliary/auxiliary_common.c     | 33 +--------
>  drivers/bus/auxiliary/bus_auxiliary_driver.h |  2 -
>  drivers/bus/auxiliary/linux/auxiliary.c      |  2 +-
>  drivers/bus/auxiliary/private.h              |  6 --
>  drivers/bus/cdx/cdx.c                        | 34 +--------
>  drivers/bus/dpaa/dpaa_bus.c                  | 71 ++++++++----------
>  drivers/bus/fslmc/fslmc_bus.c                | 75 ++++++++------------
>  drivers/bus/fslmc/fslmc_vfio.c               | 21 ++----
>  drivers/bus/ifpga/ifpga_bus.c                |  8 ++-
>  drivers/bus/pci/bsd/pci.c                    |  5 +-
>  drivers/bus/pci/linux/pci.c                  |  2 +-
>  drivers/bus/pci/pci_common.c                 | 51 ++++---------
>  drivers/bus/pci/private.h                    | 11 ---
>  drivers/bus/pci/windows/pci.c                |  4 +-
>  drivers/bus/platform/platform.c              | 43 +----------
>  drivers/bus/uacce/uacce.c                    | 39 +---------
>  drivers/bus/vdev/vdev.c                      |  2 +-
>  drivers/bus/vmbus/linux/vmbus_bus.c          |  2 +-
>  drivers/bus/vmbus/private.h                  |  3 -
>  drivers/bus/vmbus/vmbus_common.c             | 45 +++---------
>  drivers/dma/idxd/idxd_bus.c                  | 18 +----
>  lib/eal/common/eal_common_bus.c              | 54 ++++++++++++++
>  lib/eal/common/eal_common_options.c          | 10 +++
>  lib/eal/common/eal_internal_cfg.h            |  1 +
>  lib/eal/common/eal_option_list.h             |  2 +
>  lib/eal/include/bus_driver.h                 | 38 ++++++++++
>  29 files changed, 301 insertions(+), 367 deletions(-)
> 
> --
> 2.53.0