From aa3520f252182aaf64ea0b8856a3ac5e4466ce0e Mon Sep 17 00:00:00 2001 From: Arthur Hanson Rasmusson Date: Sun, 4 Oct 2026 16:19:31 -0400 Subject: vgsp: end-to-end CUDA acceptance in the guest The no-claim emulation path now runs a stock CUDA program end to end: device properties, cudaMalloc, a GPU-authored string kernel read back byte-for-byte, two 4 MB host-to-device copies, a 1 M-element vectorAdd executed on the physical GPU through the host bridge, and the device-to-host copy-back verified element by element. Three consecutive supervised cycles report MAIL + VADD bad=0 checksum=392344090.500000 + STATUS OK with identical input/output hashes. Two data-path correctness fixes make the transfers sound: - Once-only op execution per GPFIFO entry. The pump replays recently consumed ring entries when translation batches are injected so missed releases can land; re-executing a CE copy is not idempotent because its source is a client staging buffer that may have been refilled. Slots now record their raw entry words and a replayed entry matching that identity suppresses operations while still processing releases. - Per-page translation of virtual operands. svc_copy resolved only the first page of a VA range and walked the PA linearly; client staging ranges are frequently split (observed 195 + 61 pages), so the tail of alternating chunks was read from unrelated memory. Multi-page copies now re-resolve each 4 KB page through the trusted resolver. Also carries the earlier uncommitted emulation fixes that got the client to the launch (QMD address-window gate, counter registration persistence, 512 MiB emulated FB, bridge slot hygiene) and bounded diagnostics (sema-bigop, sema-bigcopy, bridge-in/out hashes, daemon INCHECK/OUTCHECK/dumps). --- tools/cuda-ab/run/vector_add | Bin 820856 -> 820856 bytes tools/cuda-ab/run/victory_mail | Bin 829280 -> 829552 bytes 2 files changed, 0 insertions(+), 0 deletions(-) (limited to 'tools/cuda-ab/run') diff --git a/tools/cuda-ab/run/vector_add b/tools/cuda-ab/run/vector_add index c1581c1..0598212 100755 Binary files a/tools/cuda-ab/run/vector_add and b/tools/cuda-ab/run/vector_add differ diff --git a/tools/cuda-ab/run/victory_mail b/tools/cuda-ab/run/victory_mail index b04f59e..62ef1de 100755 Binary files a/tools/cuda-ab/run/victory_mail and b/tools/cuda-ab/run/victory_mail differ -- cgit v1.2.3