path: root/Documentation
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authorAlex Williamson <>2013-12-19 10:17:11 -0700
committerAlex Williamson <>2013-12-19 10:17:11 -0700
commit8dcf94bcff5bf3b54380ae2a17b034fb3b9d58e5 (patch)
treec4aa4fed92a368b7ab6933e9c377c1b7b5a331bd /Documentation
parent319e2e3f63c348a9b66db4667efa73178e18b17d (diff)
misc: Reserve minor for VFIO
VFIO currently allocates it's own dynamic chardev range, reserving the first minor for the control part of the interface (/dev/vfio/vfio) and the remainder for VFIO groups (/dev/vfio/$GROUP). This works, but it doesn't support auto loading. For instance when libvirt checks for VFIO support it looks for /dev/vfio/vfio, which currently doesn't exist unless the vfio module is loaded. By converting the control device to a misc driver and reserving a static minor, we can enable auto loading. Reserving the minor is a prerequist to that conversion. Minor 196 is unused by anything currently in the kernel. Suggested-by: Paolo Bonzini <> Signed-off-by: Alex Williamson <> Acked-by: Greg Kroah-Hartman <>
Diffstat (limited to 'Documentation')
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/devices.txt b/Documentation/devices.txt
index 80b72419ffd8..10378cc48374 100644
--- a/Documentation/devices.txt
+++ b/Documentation/devices.txt
@@ -409,6 +409,7 @@ Your cooperation is appreciated.
193 = /dev/d7s SPARC 7-segment display
194 = /dev/zkshim Zero-Knowledge network shim control
195 = /dev/elographics/e2201 Elographics touchscreen E271-2201
+ 196 = /dev/vfio/vfio VFIO userspace driver interface
198 = /dev/sexec Signed executable interface
199 = /dev/scanners/cuecat :CueCat barcode scanner
200 = /dev/net/tun TAP/TUN network device