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| author | Michael S. Tsirkin <mst@redhat.com> | 2016-05-17 13:31:18 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2016-05-22 19:44:13 +0300 |
| commit | 87c9403b0d1de4676b0bd273eea68fcf6de68e68 (patch) | |
| tree | 18793d3de167ca35dd04e45f8a33a777da37256d | |
| parent | ce10c1b95095c652461616a3f887f6412ab6e1cc (diff) | |
| download | linux-87c9403b0d1de4676b0bd273eea68fcf6de68e68.tar.bz2 | |
virtio_balloon: fix PFN format for virtio-1
Everything should be LE when using virtio-1, but
the linux balloon driver does not seem to care about that.
Reported-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
| -rw-r--r-- | drivers/virtio/virtio_balloon.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 7b6d74f0c72f..476c0e3a7150 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -75,7 +75,7 @@ struct virtio_balloon { /* The array of pfns we tell the Host about. */ unsigned int num_pfns; - u32 pfns[VIRTIO_BALLOON_ARRAY_PFNS_MAX]; + __virtio32 pfns[VIRTIO_BALLOON_ARRAY_PFNS_MAX]; /* Memory statistics */ struct virtio_balloon_stat stats[VIRTIO_BALLOON_S_NR]; @@ -127,14 +127,16 @@ static void tell_host(struct virtio_balloon *vb, struct virtqueue *vq) } -static void set_page_pfns(u32 pfns[], struct page *page) +static void set_page_pfns(struct virtio_balloon *vb, + __virtio32 pfns[], struct page *page) { unsigned int i; /* Set balloon pfns pointing at this page. * Note that the first pfn points at start of the page. */ for (i = 0; i < VIRTIO_BALLOON_PAGES_PER_PAGE; i++) - pfns[i] = page_to_balloon_pfn(page) + i; + pfns[i] = cpu_to_virtio32(vb->vdev, + page_to_balloon_pfn(page) + i); } static unsigned fill_balloon(struct virtio_balloon *vb, size_t num) @@ -158,7 +160,7 @@ static unsigned fill_balloon(struct virtio_balloon *vb, size_t num) msleep(200); break; } - set_page_pfns(vb->pfns + vb->num_pfns, page); + set_page_pfns(vb, vb->pfns + vb->num_pfns, page); vb->num_pages += VIRTIO_BALLOON_PAGES_PER_PAGE; if (!virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_DEFLATE_ON_OOM)) @@ -177,10 +179,12 @@ static unsigned fill_balloon(struct virtio_balloon *vb, size_t num) static void release_pages_balloon(struct virtio_balloon *vb) { unsigned int i; + struct page *page; /* Find pfns pointing at start of each page, get pages and free them. */ for (i = 0; i < vb->num_pfns; i += VIRTIO_BALLOON_PAGES_PER_PAGE) { - struct page *page = balloon_pfn_to_page(vb->pfns[i]); + page = balloon_pfn_to_page(virtio32_to_cpu(vb->vdev, + vb->pfns[i])); if (!virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_DEFLATE_ON_OOM)) adjust_managed_page_count(page, 1); @@ -203,7 +207,7 @@ static unsigned leak_balloon(struct virtio_balloon *vb, size_t num) page = balloon_page_dequeue(vb_dev_info); if (!page) break; - set_page_pfns(vb->pfns + vb->num_pfns, page); + set_page_pfns(vb, vb->pfns + vb->num_pfns, page); vb->num_pages -= VIRTIO_BALLOON_PAGES_PER_PAGE; } @@ -471,13 +475,13 @@ static int virtballoon_migratepage(struct balloon_dev_info *vb_dev_info, __count_vm_event(BALLOON_MIGRATE); spin_unlock_irqrestore(&vb_dev_info->pages_lock, flags); vb->num_pfns = VIRTIO_BALLOON_PAGES_PER_PAGE; - set_page_pfns(vb->pfns, newpage); + set_page_pfns(vb, vb->pfns, newpage); tell_host(vb, vb->inflate_vq); /* balloon's page migration 2nd step -- deflate "page" */ balloon_page_delete(page); vb->num_pfns = VIRTIO_BALLOON_PAGES_PER_PAGE; - set_page_pfns(vb->pfns, page); + set_page_pfns(vb, vb->pfns, page); tell_host(vb, vb->deflate_vq); mutex_unlock(&vb->balloon_lock); |