From 1c37e483c205eff947de33a37545a07af71a5d73 Mon Sep 17 00:00:00 2001 From: Arthur Hanson Rasmusson Date: Wed, 21 Oct 2026 00:08:14 -0400 Subject: sema/boot: r391e print the shadow base pointer in the copy-out and bigcopy witnesses Rule in/out a stale or duplicate vgpu->bars[1] shadow between the launch copy-out (svc_fwd_req.vgpu) and the D2H reader (svc_copy's vgpu): the sum=0 runs show the write landing (OUT-PAGE-POST val8 = the sum) and the reader of the same ledger page reading zeros 8 ms later with no logged writer in between. Diagnostic only. --- 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 cef7b0a..ea025ca 100644 --- a/kernel/gsp_sema_service.h +++ b/kernel/gsp_sema_service.h @@ -417,5 +417,6 @@ bool gsp_sema_write_guard(u64 va, u64 pa, u32 ap, const char *path); * resolves) is one line instead of a forensics session. */ bool gsp_sema_gr_va_snap(u64 va, u64 *pa, u32 *ap, u64 *val8); +u8 *gsp_sema_gr_shadow_base(void); #endif /* _GSP_SEMA_SERVICE_H_ */ -- cgit v1.2.3