From 612bcec57229d1e74b04cac36d0f4b62a9bf9ebd Mon Sep 17 00:00:00 2001 From: Arthur Hanson Rasmusson Date: Mon, 28 Sep 2026 15:20:04 -0400 Subject: sema: add walk_probe - trace the page-table walk for a VA New module parameter walk_probe runs the recorded-va-space walks and the discovered-directory walk directly (pin/lat/pair map bypassed) with per-level tracing, and prints the result of each. This separates 'the page tables are not walkable' from 'the VA->PA pair map already answers' when a translation is missing. Baseline on a live boot: root PDB entries are zero (L0 e=0 idx=0) so the writes UVM issues into the level pages have no parent entry yet. --- kernel/gsp_sema_service.h | 1 + 1 file changed, 1 insertion(+) (limited to 'kernel/gsp_sema_service.h') diff --git a/kernel/gsp_sema_service.h b/kernel/gsp_sema_service.h index f652ffd..e67f0ba 100644 --- a/kernel/gsp_sema_service.h +++ b/kernel/gsp_sema_service.h @@ -57,6 +57,7 @@ void gsp_sema_service_vaspace_del(u32 h_vaspace); int gsp_sema_service_start(void); void gsp_sema_service_stop(void); int gsp_sema_service_probe(u64 gpu_va, u32 count); +int gsp_sema_service_walk_probe(u64 gpu_va); int gsp_sema_service_dump_channels(void); int gsp_sema_service_add_map(u64 gpu_va, u64 pa, u64 len, u32 ap); void gsp_sema_service_doorbell(u32 token); -- cgit v1.2.3