virtio-rng: support multiple virtio-rng devices

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Current hwrng core supports to register multiple hwrng devices,
and there is only one device really works in the same time.
QEMU alsu supports to have multiple virtio-rng backends.

This patch changes virtio-rng driver to support multiple
virtio-rng devices.

]# cat /sys/class/misc/hw_random/rng_available
virtio_rng.0 virtio_rng.1
]# cat /sys/class/misc/hw_random/rng_current
virtio_rng.0
]# echo -n virtio_rng.1 > /sys/class/misc/hw_random/rng_current
]# dd if=/dev/hwrng of=/dev/null

Signed-off-by: Amos Kong <akong@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

...

This commit is contained in:

Amos Kong 2014-05-14 10:33:46 +09:30 • committed by Rusty Russell

parent e75279c4fb

commit 08e53fbdb8

2 changed files with 64 additions and 40 deletions

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102

drivers/char/hw_random/virtio-rng.c

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2

include/linux/hw_random.h

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