Commit 9ed77dbf authored by Stefano Garzarella's avatar Stefano Garzarella Committed by Pengyuan Zhao
Browse files

vdpa_sim: add set_config callback in vdpasim_dev_attr 

stable inclusion
from stable-v5.11
commit c124a95e
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5WXCZ
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=c124a95e304bc5d37144e2fff6e52bb904d41810



----------------------------------------------------------------------

The set_config callback can be used by the device to parse the
config structure modified by the driver.

The callback will be invoked, if set, in vdpasim_set_config() after
copying bytes from caller buffer into vdpasim->config buffer.

Acked-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarStefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20201215144256.155342-14-sgarzare@redhat.com


Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarPengyuan Zhao <zhaopengyuan@hisilicon.com>
parent 9d1bf832

drivers/vdpa/vdpa_sim/vdpa_sim.c

+10 −1
Original line number Diff line number Diff line
@@ -78,6 +78,7 @@ struct vdpasim_dev_attr { 


	work_func_t work_fn;

	void (*get_config)(struct vdpasim *vdpasim, void *config);

	void (*set_config)(struct vdpasim *vdpasim, const void *config);

};



/* State of each vdpasim device */
@@ -613,7 +614,15 @@ static void vdpasim_get_config(struct vdpa_device *vdpa, unsigned int offset, 
static void vdpasim_set_config(struct vdpa_device *vdpa, unsigned int offset,

			     const void *buf, unsigned int len)

{

	/* No writable config supportted by vdpasim */

	struct vdpasim *vdpasim = vdpa_to_sim(vdpa);



	if (offset + len > vdpasim->dev_attr.config_size)

		return;



	memcpy(vdpasim->config + offset, buf, len);



	if (vdpasim->dev_attr.set_config)

		vdpasim->dev_attr.set_config(vdpasim, vdpasim->config);

}



static u32 vdpasim_get_generation(struct vdpa_device *vdpa)