| Commit message (Collapse) | Author | Age |
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Two changes for the native GR path: vadd buffers shrink to 1<<15 elements
(128 KB each) so all data fits the engine-visible 2 MB window, and
mail_kernel receives the message as a kernel-parameter buffer instead of a
__device__ constant (the c[0x4] module-data base is driver-populated and is
zero in the forwarded launch). The guest binary must be rebuilt in
tools/cuda-ab/run (ab.sh push_bin only builds when the binary is absent).
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the demo
All UPDATE_PDE_2 installs (post- or pre-commit) are invisible to the SM
walker; the only window it honours is the commit-time main small-PT page
(VA 0x100000+, the proven win0/const window). Relocate each candidate data
pointer's first 64 pages into slots 0x110..0x1f0 of that window (fresh PTE
lines, direct leaf writes), rewrite bank pointers per page record, and put
the mail page at the reserved slot 0x1f0 (c[0x4][0x0]=0x1f0000). Shrink
victory_mail's buffers (n=1<<15, 128 KB each) to fit the 2 MB window.
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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).
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- kernel: gsp_cuda_bridge (QMD launch capture, debugfs job/out/done, param+output resolution cached from inline writes), sema drain fixes (never hold/starve a channel), GR ring autopin + counter autoreg, per-page push reads, counter-derive gate; module builds clean
- tools/cuda-bridge: CUDA driver-API daemon executing mail/vadd kernels on the physical GPU, CUBB2/CBD2 v2 protocol, layout check + self-tests
- tools/guest-diag + tools/cuda-ab: scanner/pin fixes, victory push-only mode
- debug/risc-v-gsp-rm-vm: Phase S simulator wave (GSP device model, boot ladder, triage/re-demo harnesses, docs 30-41), GPGPU-sim scaffolding
- STATE-CURRENT/docs updates
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