Commit 8dcf94bc authored by Alex Williamson's avatar Alex Williamson

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: default avatarPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
Acked-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 319e2e3f
......@@ -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
......
......@@ -30,6 +30,7 @@
#define STORE_QUEUE_MINOR 155
#define I2O_MINOR 166
#define MICROCODE_MINOR 184
#define VFIO_MINOR 196
#define TUN_MINOR 200
#define CUSE_MINOR 203
#define MWAVE_MINOR 219 /* ACP/Mwave Modem */
......
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