linux/tools/virtio, branch v4.11

tools/virtio/ringtest: tweaks for s390

2017-01-19T21:46:32Z

Make ringtest work on s390 too. Signed-off-by: Halil Pasic Acked-by: Sascha Silbe Signed-off-by: Cornelia Huck

tools/virtio/ringtest: fix run-on-all.sh for offline cpus

2017-01-19T21:46:31Z

Since ef1b144d ("tools/virtio/ringtest: fix run-on-all.sh to work without /dev/cpu") run-on-all.sh uses seq 0 $HOST_AFFINITY as the list of ids of the CPUs to run the command on (assuming ids of online CPUs are consecutive and start from 0), where $HOST_AFFINITY is the highest CPU id in the system previously determined using lscpu. This can fail on systems with offline CPUs. Instead let's use lscpu to determine the list of online CPUs. Signed-off-by: Halil Pasic Fixes: ef1b144d ("tools/virtio/ringtest: fix run-on-all.sh to work without /dev/cpu") Reviewed-by: Sascha Silbe Signed-off-by: Cornelia Huck

tools/virtio: use {READ,WRITE}_ONCE() in uaccess.h

2016-12-15T22:13:37Z

As a step towards killing off ACCESS_ONCE, use {READ,WRITE}_ONCE() for the virtio tools uaccess primitives, pulling these in from . With this done, we can kill off the now-unused ACCESS_ONCE() definition. Signed-off-by: Mark Rutland Cc: Jason Wang Cc: Michael S. Tsirkin Cc: linux-kernel@vger.kernel.org Cc: virtualization@lists.linux-foundation.org Signed-off-by: Michael S. Tsirkin Reviewed-by: Cornelia Huck Reviewed-by: Jason Wang

tools/virtio: fix READ_ONCE()

2016-12-15T22:13:36Z

The virtio tools implementation of READ_ONCE() has a single parameter called 'var', but erroneously refers to 'val' for its cast, and thus won't work unless there's a variable of the correct type that happens to be called 'var'. Fix this with s/var/val/, making READ_ONCE() work as expected regardless. Fixes: a7c490333df3cff5 ("tools/virtio: use virt_xxx barriers") Signed-off-by: Mark Rutland Cc: Jason Wang Cc: Michael S. Tsirkin Cc: linux-kernel@vger.kernel.org Cc: virtualization@lists.linux-foundation.org Signed-off-by: Michael S. Tsirkin Reviewed-by: Cornelia Huck Reviewed-by: Jason Wang

ringtest: poll for new buffers once before updating event index

2016-10-30T22:21:43Z

Updating the event index has a memory barrier and causes more work on the other side to actually signal the event. It is unnecessary if a new buffer has already appeared on the ring, so poll once before doing the update. The effect of this on the 0.9 ring implementation is pretty much invisible, but on the new-style ring it provides a consistent 3% performance improvement. Signed-off-by: Paolo Bonzini Signed-off-by: Michael S. Tsirkin

ringtest: commonize implementation of poll_avail/poll_used

2016-10-30T22:21:43Z

Provide new primitives used_empty/avail_empty and build poll_avail/poll_used on top of it. Signed-off-by: Paolo Bonzini Signed-off-by: Michael S. Tsirkin

ringtest: use link-time optimization

2016-10-30T22:21:42Z

By using -flto and -fwhole-program, all functions from the ring implementation can be treated as static and possibly inlined. Force this to happen through the GCC flatten attribute. Signed-off-by: Paolo Bonzini Signed-off-by: Michael S. Tsirkin

tools/virtio: add dma stubs

2016-08-15T02:05:51Z

Fixes build after recent IOMMU-related changes, mustly by adding more stubs. Signed-off-by: Michael S. Tsirkin

ringtest: test build fix

2016-08-15T02:01:23Z

Recent changes to ptr_ring broke the ringtest which lacks a likely() stub. Fix it up. Fixes: 982fb490c298896d15e9323a882f34a57c11ff56 ("ptr_ring: support zero length ring") Signed-off-by: Michael S. Tsirkin

ptr_ring: support resizing multiple queues

2016-07-01T09:32:17Z

Sometimes, we need support resizing multiple queues at once. This is because it was not easy to recover to recover from a partial failure of multiple queues resizing. Signed-off-by: Michael S. Tsirkin Signed-off-by: Jason Wang Signed-off-by: David S. Miller