kernel/include/linux/vringh.h, branch linux-5.0.y

virtio: add explicit big-endian support to memory accessors

2015-06-01T13:48:54Z

The current memory accessors logic is: - little endian if little_endian - native endian (i.e. no byteswap) if !little_endian If we want to fully support cross-endian vhost, we also need to be able to convert to big endian. Instead of changing the little_endian argument to some 3-value enum, this patch changes the logic to: - little endian if little_endian - big endian if !little_endian The native endian case is handled by all users with a trivial helper. This patch doesn't change any functionality, nor it does add overhead. Signed-off-by: Greg Kurz Signed-off-by: Michael S. Tsirkin Reviewed-by: Cornelia Huck Reviewed-by: David Gibson

vringh: introduce vringh_is_little_endian() helper

2015-06-01T13:48:52Z

Signed-off-by: Greg Kurz Signed-off-by: Michael S. Tsirkin Acked-by: Cornelia Huck Reviewed-by: David Gibson

vringh: update for virtio 1.0 APIs

2014-12-15T21:49:28Z

When switching everything over to virtio 1.0 memory access APIs, I missed converting vringh. Fortunately, it's straight-forward. Signed-off-by: Michael S. Tsirkin

vringh: 64 bit features

2014-12-15T21:49:23Z

Pass u64 everywhere. Signed-off-by: Michael S. Tsirkin

virtio: Introduce vringh wrappers in virtio_config

2013-03-20T03:36:05Z

Add wrappers for the host vrings to support loose coupling between the virtio device and driver. A new struct vringh_config_ops with the functions find_vrhs() and del_vrhs() is added to the virtio_device struct. This enables virtio drivers to manage virtio host rings without detailed knowledge of how the vrings are created and deleted. The function vringh_notify() is added so vringh clients can notify the other side that buffers are added to the used-ring. Cc: Ohad Ben-Cohen Signed-off-by: Sjur Brændeland Signed-off-by: Rusty Russell (constified vringh_config)

vringh: host-side implementation of virtio rings.

2013-03-20T03:35:33Z

Getting use of virtio rings correct is tricky, and a recent patch saw an implementation of in-kernel rings (as separate from userspace). This abstracts the business of dealing with the virtio ring layout from the access (userspace or direct); to do this, we use function pointers, which gcc inlines correctly. Signed-off-by: Rusty Russell Acked-by: Michael S. Tsirkin