linux-kernel - [PATCH v5 1/4] vdpa: Add suspend operation

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Message-Id: <20220603100944.871727-2-eperezma@redhat.com>
Date:   Fri,  3 Jun 2022 12:09:41 +0200
From:   Eugenio Pérez <eperezma@...hat.com>
To:     kvm@...r.kernel.org, Jason Wang <jasowang@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Cc:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Longpeng <longpeng2@...wei.com>,
        Stefano Garzarella <sgarzare@...hat.com>, dinang@...inx.com,
        Piotr.Uminski@...el.com, martinpo@...inx.com, tanuj.kamde@....com,
        Parav Pandit <parav@...dia.com>,
        Zhang Min <zhang.min9@....com.cn>, habetsm.xilinx@...il.com,
        Zhu Lingshan <lingshan.zhu@...el.com>, lulu@...hat.com,
        hanand@...inx.com, martinh@...inx.com,
        Si-Wei Liu <si-wei.liu@...cle.com>, gautam.dawar@....com,
        Xie Yongji <xieyongji@...edance.com>, ecree.xilinx@...il.com,
        pabloc@...inx.com, lvivier@...hat.com, Eli Cohen <elic@...dia.com>,
        Wu Zongyong <wuzongyong@...ux.alibaba.com>,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: [PATCH v5 1/4] vdpa: Add suspend operation

This operation is optional: It it's not implemented, backend feature bit
will not be exposed.

Signed-off-by: Eugenio Pérez <eperezma@...hat.com>
---
 include/linux/vdpa.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 15af802d41c4c..8f4559795bf9f 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -215,6 +215,10 @@ 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
+ *				@suspend: suspend (true), resume (false)
+ *				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
@@ -316,6 +320,7 @@ 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, bool suspend);
 	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