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tests: fix qvirtqueue_kick 

vq->avail.idx and vq->avail->ring[] are a 16bit values,
so read and write them with readw()/writew() instead of
readl()/writel().

To read/write a 16bit value with a 32bit accessor works fine
on little-endian CPU but not on big endian CPU.

[An equivalent patch for the writew() calls was also sent by
Zhang Shuai <zhangshuai13@huawei.com>.
--Stefan]

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Message-id: 1472330054-22607-1-git-send-email-lvivier@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Laurent Vivier 2016-08-27 16:34:14 -04:00 committed by Stefan Hajnoczi
parent 049105a3c1
commit e49f827725
1 changed files with 3 additions and 3 deletions
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6
tests/libqos/virtio.c
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@ -257,16 +257,16 @@ void qvirtqueue_kick(const QVirtioBus *bus, QVirtioDevice *d, QVirtQueue *vq,
uint32_t free_head)
{
/* vq->avail->idx */
uint16_t idx = readl(vq->avail + 2);
uint16_t idx = readw(vq->avail + 2);
/* vq->used->flags */
uint16_t flags;
/* vq->used->avail_event */
uint16_t avail_event;
/* vq->avail->ring[idx % vq->size] */
writel(vq->avail + 4 + (2 * (idx % vq->size)), free_head);
writew(vq->avail + 4 + (2 * (idx % vq->size)), free_head);
/* vq->avail->idx */
writel(vq->avail + 2, idx + 1);
writew(vq->avail + 2, idx + 1);
/* Must read after idx is updated */
flags = readw(vq->avail);