linux-toradex.git/tools/virtio, branch v4.6-rc3

virtio_ring: Support DMA APIs

2016-03-02T15:01:57+00:00

virtio_ring currently sends the device (usually a hypervisor)
physical addresses of its I/O buffers.  This is okay when DMA
addresses and physical addresses are the same thing, but this isn't
always the case.  For example, this never works on Xen guests, and
it is likely to fail if a physical "virtio" device ever ends up
behind an IOMMU or swiotlb.

The immediate use case for me is to enable virtio on Xen guests.
For that to work, we need vring to support DMA address translation
as well as a corresponding change to virtio_pci or to another
driver.

Signed-off-by: Andy Lutomirski 
Signed-off-by: Michael S. Tsirkin

tools/virtio: add ringtest utilities

2016-01-26T08:18:30+00:00

This adds micro-benchmarks useful for tuning virtio ring layouts.
Three layouts are currently implemented:

- virtio 0.9 compatible one
- an experimental extension bypassing the ring index, polling ring
  itself instead
- an experimental extension bypassing avail and used ring completely

Typical use:

sh run-on-all.sh perf stat -r 10 --log-fd 1 -- ./ring

It doesn't depend on the kernel directly, but it's handy
to have as much virtio stuff as possible in one tree.

Signed-off-by: Michael S. Tsirkin

tools/virtio: use virt_xxx barriers

2016-01-26T08:18:29+00:00

Fix build after API changes.

Reported-by: Kamal Mostafa 
Signed-off-by: Michael S. Tsirkin

tools/virtio: fix byteswap logic

2015-12-07T15:28:10+00:00

commit cf561f0d2eb74574ad9985a2feab134267a9d298 ("virtio: introduce
virtio_is_little_endian() helper") changed byteswap logic to
skip feature bit checks for LE platforms, but didn't
update tools/virtio, so vring_bench started failing.

Update the copy under tools/virtio/ (TODO: find a way to avoid this code
duplication).

Cc: Greg Kurz 
Signed-off-by: Michael S. Tsirkin

tools/virtio: move list macro stubs

2015-12-07T15:28:09+00:00

Makes them more generally available.

Signed-off-by: Michael S. Tsirkin

tools/virtio: propagate V=X to kernel build

2015-09-16T09:48:07+00:00

Signed-off-by: Michael S. Tsirkin

tools/virtio: fix build after 4.2 changes

2015-09-09T19:03:30+00:00

more stubs, mostly

Signed-off-by: Michael S. Tsirkin

tools/virtio: add virtio 1.0 in vringh_test

2014-12-15T21:49:22+00:00

Signed-off-by: Michael S. Tsirkin

tools/virtio: add virtio 1.0 in virtio_test

2014-12-15T21:49:22+00:00

Signed-off-by: Michael S. Tsirkin

tools/virtio: enable -Werror

2014-12-15T21:49:21+00:00

Seems to mostly be a positive.

Signed-off-by: Michael S. Tsirkin