diff options
Diffstat (limited to 'kernel/gsp_phys_gpu.c')
| -rw-r--r-- | kernel/gsp_phys_gpu.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/kernel/gsp_phys_gpu.c b/kernel/gsp_phys_gpu.c index c5419a5..9b7235b 100644 --- a/kernel/gsp_phys_gpu.c +++ b/kernel/gsp_phys_gpu.c @@ -949,6 +949,31 @@ int gsp_phys_rmcall_gr_skedrec_value(void) EXPORT_SYMBOL_GPL(gsp_phys_rmcall_gr_skedrec_value); /* + * m153 no-write/wrong-place launch retry (gsp_phys_rmcall_gr_nowrite_retry; + * default 1). After a forwarded launch reports completion, the output + * retirement wait measures how many resolved data pages the engine actually + * changed. Two mis-execution signatures are known to be intermittent per + * boot: the engine writes nothing at all, or it writes into a lower operand + * window while the highest (output) operand stays untouched (a stale + * constant-source state). Both re-execute correctly on a fresh ring entry + * often enough to be worth a bounded retry: refill the bounce window from + * the guest inputs, re-publish the same method block, re-issue the schedule + * and re-poll, then re-wait. Set to 0 to disable the retry and accept the + * first outcome unconditionally. + */ +static int gsp_phys_rmcall_gr_nowrite_retry_param = 1; +module_param_named(gsp_phys_rmcall_gr_nowrite_retry, + gsp_phys_rmcall_gr_nowrite_retry_param, int, 0644); +MODULE_PARM_DESC(gsp_phys_rmcall_gr_nowrite_retry, + "Re-execute a forwarded GR launch whose retirement wait saw zero/wrong-place engine writes (default 1)"); + +int gsp_phys_rmcall_gr_nowrite_retry_value(void) +{ + return gsp_phys_rmcall_gr_nowrite_retry_param; +} +EXPORT_SYMBOL_GPL(gsp_phys_rmcall_gr_nowrite_retry_value); + +/* * m69 window-0 shadow pool (gsp_phys_rmcall_gr_shadow_win0; default 0). When * set, the forwarded GR launch copies the QMD's program/param pages into the * window-0 shadow pool (module pages at VAs 0x108000..0x10f000, PTEs planted |