diff options
Diffstat (limited to 'kernel/main.c')
| -rw-r--r-- | kernel/main.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/kernel/main.c b/kernel/main.c index 5ff5047..7af236d 100644 --- a/kernel/main.c +++ b/kernel/main.c @@ -2991,6 +2991,30 @@ module_param_cb(sema_pdb_discover, &nv_vgpu_sema_pdb_discover_ops, NULL, 0200); MODULE_PARM_DESC(sema_pdb_discover, "Retrigger the VAS pdb discovery with a verified ring pair (hex va,hex pa)"); /* + * Debug: bounded channel rewind. Clears the consumed-slot bitmap and the + * per-entry rescue state for one channel (hex h_object) or every channel + * ("all"), so the pump re-processes its ring from slot 0 - used after the + * VAS pdb anchor lands so entries skipped before it re-decode (the release + * they carry would otherwise be lost for that put epoch). + */ +static int nv_vgpu_sema_chan_rewind_set(const char *val, + const struct kernel_param *kp) +{ + u32 h = 0xffffffffu; + + if (strncmp(val, "all", 3) && kstrtouint(val, 0, &h)) + return -EINVAL; + return gsp_sema_service_chan_rewind(h); +} + +static const struct kernel_param_ops nv_vgpu_sema_chan_rewind_ops = { + .set = nv_vgpu_sema_chan_rewind_set, +}; + +module_param_cb(sema_chan_rewind, &nv_vgpu_sema_chan_rewind_ops, NULL, 0200); +MODULE_PARM_DESC(sema_chan_rewind, "Rewind a channel's ring (hex h_object or 'all')"); + +/* * Debug: register a channel's GPU completion counter (guest PA of the u32 * tracking counter the GPU would write when a push completes): * echo <h_object>,<pa> > .../parameters/sema_counter |