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authorAlex Williamson <alex.williamson@redhat.com>2013-12-19 21:17:11 +0400
committerAlex Williamson <alex.williamson@redhat.com>2013-12-19 21:17:11 +0400
commit8dcf94bcff5bf3b54380ae2a17b034fb3b9d58e5 (patch)
treec4aa4fed92a368b7ab6933e9c377c1b7b5a331bd /include/linux/miscdevice.h
parent319e2e3f63c348a9b66db4667efa73178e18b17d (diff)
downloadlinux-8dcf94bcff5bf3b54380ae2a17b034fb3b9d58e5.tar.xz
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 <pbonzini@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/miscdevice.h')
-rw-r--r--include/linux/miscdevice.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h
index f7eaf2d60083..3737f7218f51 100644
--- a/include/linux/miscdevice.h
+++ b/include/linux/miscdevice.h
@@ -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 */