* Re: [PATCH] virtio_balloon: fix up endian-ness for free cmd id
2020-07-27 16:03 [PATCH] virtio_balloon: fix up endian-ness for free cmd id Michael S. Tsirkin
@ 2020-07-27 16:56 ` David Hildenbrand
2020-07-28 6:37 ` Wei Wang
2020-07-29 9:33 ` Jason Wang
2 siblings, 0 replies; 4+ messages in thread
From: David Hildenbrand @ 2020-07-27 16:56 UTC (permalink / raw)
To: Michael S. Tsirkin, linux-kernel
Cc: stable, Jason Wang, Liang Li, Wei Wang, virtualization,
Alexander Duyck
On 27.07.20 18:03, Michael S. Tsirkin wrote:
> free cmd id is read using virtio endian, spec says all fields
> in balloon are LE. Fix it up.
>
> Fixes: 86a559787e6f ("virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT")
> Cc: stable@vger.kernel.org
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
> drivers/virtio/virtio_balloon.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
> index 774deb65a9bb..798ec304fe3e 100644
> --- a/drivers/virtio/virtio_balloon.c
> +++ b/drivers/virtio/virtio_balloon.c
> @@ -578,10 +578,14 @@ static int init_vqs(struct virtio_balloon *vb)
> static u32 virtio_balloon_cmd_id_received(struct virtio_balloon *vb)
> {
> if (test_and_clear_bit(VIRTIO_BALLOON_CONFIG_READ_CMD_ID,
> - &vb->config_read_bitmap))
> + &vb->config_read_bitmap)) {
> virtio_cread(vb->vdev, struct virtio_balloon_config,
> free_page_hint_cmd_id,
> &vb->cmd_id_received_cache);
> + /* Legacy balloon config space is LE, unlike all other devices. */
> + if (!virtio_has_feature(vb->vdev, VIRTIO_F_VERSION_1))
> + vb->cmd_id_received_cache = le32_to_cpu((__force __le32)vb->cmd_id_received_cache);
> + }
>
> return vb->cmd_id_received_cache;
> }
>
Acked-by: David Hildenbrand <david@redhat.com>
--
Thanks,
David / dhildenb
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] virtio_balloon: fix up endian-ness for free cmd id
2020-07-27 16:03 [PATCH] virtio_balloon: fix up endian-ness for free cmd id Michael S. Tsirkin
2020-07-27 16:56 ` David Hildenbrand
@ 2020-07-28 6:37 ` Wei Wang
2020-07-29 9:33 ` Jason Wang
2 siblings, 0 replies; 4+ messages in thread
From: Wei Wang @ 2020-07-28 6:37 UTC (permalink / raw)
To: Michael S. Tsirkin, linux-kernel
Cc: stable, David Hildenbrand, Jason Wang, Liang Li, virtualization,
Alexander Duyck
On 07/28/2020 12:03 AM, Michael S. Tsirkin wrote:
> free cmd id is read using virtio endian, spec says all fields
> in balloon are LE. Fix it up.
>
> Fixes: 86a559787e6f ("virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT")
> Cc: stable@vger.kernel.org
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
> drivers/virtio/virtio_balloon.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
> index 774deb65a9bb..798ec304fe3e 100644
> --- a/drivers/virtio/virtio_balloon.c
> +++ b/drivers/virtio/virtio_balloon.c
> @@ -578,10 +578,14 @@ static int init_vqs(struct virtio_balloon *vb)
> static u32 virtio_balloon_cmd_id_received(struct virtio_balloon *vb)
> {
> if (test_and_clear_bit(VIRTIO_BALLOON_CONFIG_READ_CMD_ID,
> - &vb->config_read_bitmap))
> + &vb->config_read_bitmap)) {
> virtio_cread(vb->vdev, struct virtio_balloon_config,
> free_page_hint_cmd_id,
> &vb->cmd_id_received_cache);
> + /* Legacy balloon config space is LE, unlike all other devices. */
> + if (!virtio_has_feature(vb->vdev, VIRTIO_F_VERSION_1))
> + vb->cmd_id_received_cache = le32_to_cpu((__force __le32)vb->cmd_id_received_cache);
Seems it exceeds 80 character length.
Reviewed-by: Wei Wang <wei.w.wang@intel.com>
Best,
Wei
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] virtio_balloon: fix up endian-ness for free cmd id
2020-07-27 16:03 [PATCH] virtio_balloon: fix up endian-ness for free cmd id Michael S. Tsirkin
2020-07-27 16:56 ` David Hildenbrand
2020-07-28 6:37 ` Wei Wang
@ 2020-07-29 9:33 ` Jason Wang
2 siblings, 0 replies; 4+ messages in thread
From: Jason Wang @ 2020-07-29 9:33 UTC (permalink / raw)
To: Michael S. Tsirkin, linux-kernel
Cc: stable, David Hildenbrand, Liang Li, Wei Wang, virtualization,
Alexander Duyck
On 2020/7/28 上午12:03, Michael S. Tsirkin wrote:
> free cmd id is read using virtio endian, spec says all fields
> in balloon are LE. Fix it up.
>
> Fixes: 86a559787e6f ("virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT")
> Cc: stable@vger.kernel.org
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
> drivers/virtio/virtio_balloon.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
> index 774deb65a9bb..798ec304fe3e 100644
> --- a/drivers/virtio/virtio_balloon.c
> +++ b/drivers/virtio/virtio_balloon.c
> @@ -578,10 +578,14 @@ static int init_vqs(struct virtio_balloon *vb)
> static u32 virtio_balloon_cmd_id_received(struct virtio_balloon *vb)
> {
> if (test_and_clear_bit(VIRTIO_BALLOON_CONFIG_READ_CMD_ID,
> - &vb->config_read_bitmap))
> + &vb->config_read_bitmap)) {
> virtio_cread(vb->vdev, struct virtio_balloon_config,
> free_page_hint_cmd_id,
> &vb->cmd_id_received_cache);
> + /* Legacy balloon config space is LE, unlike all other devices. */
> + if (!virtio_has_feature(vb->vdev, VIRTIO_F_VERSION_1))
> + vb->cmd_id_received_cache = le32_to_cpu((__force __le32)vb->cmd_id_received_cache);
> + }
>
> return vb->cmd_id_received_cache;
> }
Acked-by: Jason Wang <jasowang@redhat.com>
^ permalink raw reply [flat|nested] 4+ messages in thread