linux/tools/virtio, branch v4.7

tools/virtio: add noring tool

2016-06-06T10:00:11Z

Useful to measure testing framework overhead. Signed-off-by: Michael S. Tsirkin

tools/virtio/ringtest: fix run-on-all.sh to work without /dev/cpu

2016-06-06T10:00:11Z

/dev/cpu is only available on x86 with certain modules (e.g. msr) enabled. Using lscpu to get processors count is more portable. Signed-off-by: Mike Rapoport Signed-off-by: Michael S. Tsirkin

tools/virtio/ringtest: add usage example to README

2016-06-06T10:00:11Z

Having typical usage example in the README file is more convinient than in the git history... Signed-off-by: Mike Rapoport Signed-off-by: Michael S. Tsirkin

ringtest: pass buf != NULL

2016-05-22T16:44:14Z

just a stub pointer for now. Signed-off-by: Michael S. Tsirkin

virtio: add inorder option

2016-05-22T16:44:12Z

skips ring accesses but drops out of order support Signed-off-by: Michael S. Tsirkin

virtio_ring: Support DMA APIs

2016-03-02T15:01:57Z

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

2016-01-26T08:18:30Z

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

2016-01-26T08:18:29Z

Fix build after API changes. Reported-by: Kamal Mostafa Signed-off-by: Michael S. Tsirkin

tools/virtio: fix byteswap logic

2015-12-07T15:28:10Z

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

2015-12-07T15:28:09Z

Makes them more generally available. Signed-off-by: Michael S. Tsirkin