[PATCH 12/18] virtio_test: support used_event index

[Michael S. Tsirkin]

Add ability to test the new used_event feature,
enable by default.

Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
---
 tools/virtio/virtio_test.c |   18 ++++++++++++++++--
 1 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/tools/virtio/virtio_test.c b/tools/virtio/virtio_test.c
index 9e65e6d..157ec68 100644
--- a/tools/virtio/virtio_test.c
+++ b/tools/virtio/virtio_test.c
@@ -210,18 +210,29 @@ const struct option longopts[] = {
                .val = 'i',
        },
        {
+               .name = "used-event-idx",
+               .val = 'U',
+       },
+       {
+               .name = "no-used-event-idx",
+               .val = 'u',
+       },
+       {
        }
 };
 
 static void help()
 {
-       fprintf(stderr, "Usage: virtio_test [--help] [--no-indirect]\n");
+       fprintf(stderr, "Usage: virtio_test [--help]"
+               " [--no-indirect] "
+               " [--no-used-event-idx]\n");
 }
 
 int main(int argc, char **argv)
 {
        struct vdev_info dev;
-       unsigned long long features = 1ULL << VIRTIO_RING_F_INDIRECT_DESC;
+       unsigned long long features = (1ULL << VIRTIO_RING_F_INDIRECT_DESC) |
+               (1ULL << VIRTIO_RING_F_USED_EVENT_IDX);
        int o;
 
        for (;;) {
@@ -238,6 +249,9 @@ int main(int argc, char **argv)
                case 'i':
                        features &= ~(1ULL << VIRTIO_RING_F_INDIRECT_DESC);
                        break;
+               case 'u':
+                       features &= ~(1ULL << VIRTIO_RING_F_USED_EVENT_IDX);
+                       break;
                default:
                        assert(0);
                        break;
-- 
1.7.5.53.gc233e

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