This is a note to let you know that I've just added the patch titled virtio_balloon: fix PFN format for virtio-1 to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: virtio_balloon-fix-pfn-format-for-virtio-1.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 87c9403b0d1de4676b0bd273eea68fcf6de68e68 Mon Sep 17 00:00:00 2001 From: "Michael S. Tsirkin" <mst@xxxxxxxxxx> Date: Tue, 17 May 2016 13:31:18 +0300 Subject: virtio_balloon: fix PFN format for virtio-1 From: Michael S. Tsirkin <mst@xxxxxxxxxx> commit 87c9403b0d1de4676b0bd273eea68fcf6de68e68 upstream. 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@xxxxxxxxxx> Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx> Tested-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx> Reviewed-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/virtio/virtio_balloon.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -73,7 +73,7 @@ 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 */ int need_stats_update; @@ -125,14 +125,16 @@ static void tell_host(struct virtio_ball wait_event(vb->acked, virtqueue_get_buf(vq, &len)); } -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 void fill_balloon(struct virtio_balloon *vb, size_t num) @@ -155,7 +157,7 @@ static void fill_balloon(struct virtio_b 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)) @@ -171,10 +173,12 @@ static void fill_balloon(struct virtio_b 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); @@ -197,7 +201,7 @@ static unsigned leak_balloon(struct virt 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; } @@ -465,13 +469,13 @@ static int virtballoon_migratepage(struc __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); Patches currently in stable-queue which might be from mst@xxxxxxxxxx are queue-4.4/virtio_balloon-fix-pfn-format-for-virtio-1.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html