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| author | Stefano Garzarella <sgarzare@redhat.com> | 2020-12-15 15:42:51 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-12-18 16:14:29 -0500 |
| commit | c124a95e304bc5d37144e2fff6e52bb904d41810 (patch) | |
| tree | 3e64a6579b4b204db75220a5b0d0ca29b893b0f4 /drivers/vdpa | |
| parent | 65b709586e222fa6ffd4166ac7fdb5d5dad113ee (diff) | |
| download | linux-c124a95e304bc5d37144e2fff6e52bb904d41810.tar.gz | |
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.c | 11 |
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) |