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authorStefano Garzarella <sgarzare@redhat.com>2020-12-15 17:42:51 +0300
committerMichael S. Tsirkin <mst@redhat.com>2020-12-19 00:14:29 +0300
commitc124a95e304bc5d37144e2fff6e52bb904d41810 (patch)
tree3e64a6579b4b204db75220a5b0d0ca29b893b0f4 /drivers/vdpa
parent65b709586e222fa6ffd4166ac7fdb5d5dad113ee (diff)
downloadlinux-c124a95e304bc5d37144e2fff6e52bb904d41810.tar.xz
vdpa_sim: add set_config callback in vdpasim_dev_attr
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: Jason Wang <jasowang@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Link: https://lore.kernel.org/r/20201215144256.155342-14-sgarzare@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vdpa')
-rw-r--r--drivers/vdpa/vdpa_sim/vdpa_sim.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 5eadcd19ab6f..e219aa852ef8 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -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 */
@@ -606,7 +607,15 @@ 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)