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uio_hv_generic: support sub-channels

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Use sysfs to allow supporting sub-channels. The userspace application
makes request to host to create sub-channels and the UIO kernel
driver populates the sysfs per-channel directory with a binary
attribute file that can be used to read/write ring.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stephen Hemminger
2018-02-05 10:40:27 -08:00
committed by Greg Kroah-Hartman
parent cf21be919c
commit 37b96a4931
3 changed files with 101 additions and 0 deletions
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7
Documentation/ABI/stable/sysfs-bus-vmbus
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@@ -132,3 +132,10 @@ KernelVersion: 4.16
Contact: Stephen Hemminger <sthemmin@microsoft.com>
Description: Monitor bit associated with channel
Users: Debugging tools and userspace drivers
What: /sys/bus/vmbus/devices/vmbus_*/channels/NN/ring
Date: January. 2018
KernelVersion: 4.16
Contact: Stephen Hemminger <sthemmin@microsoft.com>
Description: Binary file created by uio_hv_generic for ring buffer
Users: Userspace drivers