diff options
Diffstat (limited to 'kernel/gsp_phys_gpu.c')
| -rw-r--r-- | kernel/gsp_phys_gpu.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/kernel/gsp_phys_gpu.c b/kernel/gsp_phys_gpu.c index 974100a..f323c6c 100644 --- a/kernel/gsp_phys_gpu.c +++ b/kernel/gsp_phys_gpu.c @@ -704,6 +704,28 @@ int gsp_phys_rmcall_gr_qmdwin_value(void) EXPORT_SYMBOL_GPL(gsp_phys_rmcall_gr_qmdwin_value); /* + * m64 forced module-semaphore release (gsp_phys_rmcall_gr_rel_mod; default 0). + * When set, a forwarded GR launch ignores the resolved guest release page and + * points QMD release0 at the module window-0 semaphore VA + * (GSP_PHYS_RMCALL_VA_SEM), which the host polls at the SEM chunk's host VA. + * Discriminant for "engine completed but the shadow release write was lost" + * vs "engine never completed": with the module release, a completed QMD is + * always observable. Also makes the existing module-release fallback + * observable (it previously set no poll source, so it could never complete). + */ +static int gsp_phys_rmcall_gr_rel_mod_param; +module_param_named(gsp_phys_rmcall_gr_rel_mod, + gsp_phys_rmcall_gr_rel_mod_param, int, 0644); +MODULE_PARM_DESC(gsp_phys_rmcall_gr_rel_mod, + "Force the forwarded GR QMD release0 to the module semaphore (default 0; 1 = m64 engine-completion discriminant)"); + +int gsp_phys_rmcall_gr_rel_mod_value(void) +{ + return gsp_phys_rmcall_gr_rel_mod_param; +} +EXPORT_SYMBOL_GPL(gsp_phys_rmcall_gr_rel_mod_value); + +/* * Ladder VAS ownership selector (gsp_phys_rmcall_vas_shared; default 0). * The H1 GR promote wall is a direct consequence of the ladder's * externally-owned FERMI_VASPACE_A: with IS_EXTERNALLY_OWNED the RM treats |