vgsp: ctxshare_force probe - share on the proven mode-31 execution channel (V6+sibling A attach via params init)

1 files changed, 19 insertions, 0 deletions

diff --git a/kernel/gsp_phys_gpu.c b/kernel/gsp_phys_gpu.c
index e2fffc9..974100a 100644
--- a/kernel/gsp_phys_gpu.c
+++ b/kernel/gsp_phys_gpu.c
@@ -309,6 +309,25 @@ bool gsp_phys_rmcall_golden_enabled(void)
 EXPORT_SYMBOL_GPL(gsp_phys_rmcall_golden_enabled);
 
 /*
+ * Mode-31 share probe (default 0): allocate FERMI_CONTEXT_SHARE_A on the
+ * ladder TSG before the golden replay for ANY GR promote mode, so the proven
+ * mode-31 execution channel V6 (and the sibling A) attach to the share while
+ * keeping mode 31's construct/commit flow. Tests whether the context share is
+ * the QMD-dispatch discriminator. Requires gsp_phys_rmcall_vas_shared=1.
+ */
+static bool gsp_phys_rmcall_ctxshare_force_param;
+module_param_named(gsp_phys_rmcall_ctxshare_force,
+		   gsp_phys_rmcall_ctxshare_force_param, bool, 0644);
+MODULE_PARM_DESC(gsp_phys_rmcall_ctxshare_force,
+		 "Force FERMI_CONTEXT_SHARE_A allocation before the golden replay for any GR promote mode (default 0; requires gsp_phys_rmcall_vas_shared=1)");
+
+bool gsp_phys_rmcall_ctxshare_force_value(void)
+{
+	return gsp_phys_rmcall_ctxshare_force_param;
+}
+EXPORT_SYMBOL_GPL(gsp_phys_rmcall_ctxshare_force_value);
+
+/*
  * P5 wave-1 shadow work forwarding (default 0). When set, the sema service
  * requests one real CE copy on the debugfs ladder's channel for each decoded
  * guest CE push, using only the ladder's module-owned buffers; the software