linux-kernel - Re: [PATCH v2 05/24] virtio_balloon: correct tags for config space fields

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Date:   Mon, 3 Aug 2020 23:26:46 +0200
From:   David Hildenbrand <david@...hat.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        Jason Wang <jasowang@...hat.com>,
        David Hildenbrand <david@...hat.com>
Subject: Re: [PATCH v2 05/24] virtio_balloon: correct tags for config space fields



> Am 03.08.2020 um 22:59 schrieb Michael S. Tsirkin <mst@...hat.com>:
> 
> Tag config space fields as having little endian-ness.
> Note that balloon is special: LE even when using
> the legacy interface.
> 
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>

Acked-by: David Hildenbrand <david@...hat.com>

> ---
> include/uapi/linux/virtio_balloon.h | 10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h
> index dc3e656470dd..ddaa45e723c4 100644
> --- a/include/uapi/linux/virtio_balloon.h
> +++ b/include/uapi/linux/virtio_balloon.h
> @@ -45,20 +45,20 @@
> #define VIRTIO_BALLOON_CMD_ID_DONE    1
> struct virtio_balloon_config {
>    /* Number of pages host wants Guest to give up. */
> -    __u32 num_pages;
> +    __le32 num_pages;
>    /* Number of pages we've actually got in balloon. */
> -    __u32 actual;
> +    __le32 actual;
>    /*
>     * Free page hint command id, readonly by guest.
>     * Was previously named free_page_report_cmd_id so we
>     * need to carry that name for legacy support.
>     */
>    union {
> -        __u32 free_page_hint_cmd_id;
> -        __u32 free_page_report_cmd_id;    /* deprecated */
> +        __le32 free_page_hint_cmd_id;
> +        __le32 free_page_report_cmd_id;    /* deprecated */
>    };
>    /* Stores PAGE_POISON if page poisoning is in use */
> -    __u32 poison_val;
> +    __le32 poison_val;
> };
> 
> #define VIRTIO_BALLOON_S_SWAP_IN  0   /* Amount of memory swapped in */
> -- 
> MST
>