linux-kernel - Re: [PATCH v7 1/4] vdpa: Add suspend operation

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Message-ID: <20220811042717-mutt-send-email-mst@kernel.org>
Date:   Thu, 11 Aug 2022 04:27:32 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Eugenio Pérez <eperezma@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jason Wang <jasowang@...hat.com>,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        dinang@...inx.com, martinpo@...inx.com,
        Wu Zongyong <wuzongyong@...ux.alibaba.com>,
        Piotr.Uminski@...el.com, gautam.dawar@....com,
        ecree.xilinx@...il.com, martinh@...inx.com,
        Stefano Garzarella <sgarzare@...hat.com>, pabloc@...inx.com,
        habetsm.xilinx@...il.com, lvivier@...hat.com,
        Zhu Lingshan <lingshan.zhu@...el.com>, tanuj.kamde@....com,
        Longpeng <longpeng2@...wei.com>, lulu@...hat.com,
        hanand@...inx.com, Parav Pandit <parav@...dia.com>,
        Si-Wei Liu <si-wei.liu@...cle.com>,
        Eli Cohen <elic@...dia.com>,
        Xie Yongji <xieyongji@...edance.com>,
        Zhang Min <zhang.min9@....com.cn>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: Re: [PATCH v7 1/4] vdpa: Add suspend operation

On Wed, Aug 10, 2022 at 07:15:09PM +0200, Eugenio Pérez wrote:
> This operation is optional: It it's not implemented, backend feature bit
> will not be exposed.
> 
> Signed-off-by: Eugenio Pérez <eperezma@...hat.com>
> Message-Id: <20220623160738.632852-2-eperezma@...hat.com>
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>

What is this message id doing here?

> ---
>  include/linux/vdpa.h | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
> index 7b4a13d3bd91..d282f464d2f1 100644
> --- a/include/linux/vdpa.h
> +++ b/include/linux/vdpa.h
> @@ -218,6 +218,9 @@ struct vdpa_map_file {
>   * @reset:			Reset device
>   *				@vdev: vdpa device
>   *				Returns integer: success (0) or error (< 0)
> + * @suspend:			Suspend or resume the device (optional)
> + *				@vdev: vdpa device
> + *				Returns integer: success (0) or error (< 0)
>   * @get_config_size:		Get the size of the configuration space includes
>   *				fields that are conditional on feature bits.
>   *				@vdev: vdpa device
> @@ -319,6 +322,7 @@ struct vdpa_config_ops {
>  	u8 (*get_status)(struct vdpa_device *vdev);
>  	void (*set_status)(struct vdpa_device *vdev, u8 status);
>  	int (*reset)(struct vdpa_device *vdev);
> +	int (*suspend)(struct vdpa_device *vdev);
>  	size_t (*get_config_size)(struct vdpa_device *vdev);
>  	void (*get_config)(struct vdpa_device *vdev, unsigned int offset,
>  			   void *buf, unsigned int len);
> -- 
> 2.31.1