Rusty Russell 42b36cc0ce virtio: Force use of power-of-two for descriptor ring sizes ...

The virtio descriptor rings of size N-1 were nicely set up to be
aligned to an N-byte boundary.  But as Anthony Liguori points out, the
free-running indices used by virtio require that the sizes be a power
of 2, otherwise we get problems on wrap (demonstrated with lguest).

So we replace the clever "2^n-1" scheme with a simple "align to page
boundary" scheme: this means that all virtio rings take at least two
pages, but it's safer than guessing cache alignment.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

2007-11-12 13:59:40 +11:00

..

config.c

Virtio interface

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Kconfig

Virtio helper routines for a descriptor ringbuffer implementation

2007-10-23 15:49:55 +10:00

Makefile

Virtio helper routines for a descriptor ringbuffer implementation

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virtio_ring.c

virtio: Force use of power-of-two for descriptor ring sizes

2007-11-12 13:59:40 +11:00

virtio.c

Module autoprobing support for virtio drivers.

2007-10-23 15:49:55 +10:00