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3 commits

Author SHA1 Message Date
Tiwei Bie
8129b9e8e3 um: vfio: Support adding devices via mconsole 
It can be used when we want to pass through PCI devices to UML
while it's up and running. PCI devices can be passed through to
UML using the same syntax as the command line option:

(mconsole) config vfio_uml.device=<domain🚌slot.function>

Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Link: https://patch.msgid.link/20250709010021.1076902-1-tiwei.bie@linux.dev
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
 2025-07-11 08:49:44 +02:00
Tiwei Bie
bc4e2ae081 um: vfio: Prevent duplicate device assignments 
Ensure devices are assigned only once. Reject subsequent requests
for duplicate assignments.

Fixes: a0e2cb6a90 ("um: Add VFIO-based virtual PCI driver")
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Link: https://patch.msgid.link/20250606124428.148164-4-tiwei.btw@antgroup.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
 2025-06-25 09:26:06 +02:00
Tiwei Bie
a0e2cb6a90 um: Add VFIO-based virtual PCI driver 
Implement a new virtual PCI driver based on the VFIO framework.
This driver allows users to pass through PCI devices to UML via
VFIO. Currently, only MSI-X capable devices are supported, and
it is assumed that drivers will use MSI-X.

Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Link: https://patch.msgid.link/20250413154421.517878-1-tiwei.btw@antgroup.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
 2025-05-05 10:25:24 +02:00