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* vgsp: host CUDA bridge + sema release recovery; greeneye simulator waveArthur Hanson Rasmusson9 days
| | | | | | | | - 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
* kernel: GR context-promote bisection modes 4-17 and server-managed-ctxbuf ↵Arthur Hanson Rasmusson10 days
| | | | | | | | | | | | | | | | | | | | registry variant; complete vgsp rename; docs/tooling refresh - gsp_phys_booter: GR promote bisection modes 4-17 (two-phase zero-field VA, batched entries, hVirtMemory, bare VA, KMD SKIP_CTXBUFFER_ALLOC channel, old-interface GPU_INITIALIZE_CTX, FBMEM context buffer, UVM-faithful PA-only, PATCH/PM auxiliary promotes, server-managed no-promote path); PATCH/PM geometry queries and buffers; pre-boot SET_REGISTRY profile selection - gsp_phys_gpu: gsp_phys_rmcall_gr_promote clamp 0..17 and gsp_phys_srv_ctxbuf parameter; registry image variant with RMSetClientRMAllocatedCtxBuffer=0 - vgsp rename across kernel, scripts, tools and docs (module vgsp.ko, /sys/kernel/debug/vgsp/, vgsp-<subsystem>: log prefixes) - risc-v-gsp-rm-debugger user-facing rename and docs/CI refresh; guest-diag tool updates; README/SBOM/install/Makefile sync Live status: CE ladder and P6 guest-copy forwarding green; GR engine context commit still open (all promote shapes accepted or cleanly refused; the channel stays CTXNOTVALID) - see Handoff-vGPU-IO.md Addendum 21 (local).
* gsp-phys: P6a - real copy engine reads/writes guest RAM pagesArthur Hanson Rasmusson10 days
| | | | | | | | | | | | | | | | | | | - file-backed guest RAM (launcher memory-backend-file share=on) and in-kernel GPA->HPA translation through the shared file page cache (read_cache_page + page_to_phys + pfn_valid), opened O_LARGEFILE; new default-off gsp_phys_guest_mem parameter - debugfs gsp-phys-guest-ram (path + gpa/off/size ranges) and gsp-phys-guest-gpa (one pinned GPA per boot); rm-call triggers 6/7 run host->guest and guest->host 4 KiB CE copies; trigger 8 is a PTE self-test through a fresh slot - guest page-table slots are pre-built during ladder stage 3: runtime PTE writes into an already-walked page-table line are not observed without a TLB invalidate - guest RAM layout (q35 4.2, 4 GiB): below-4G GPA == file offset, above-4G offset = GPA - 0x80000000 (2 GiB PCI hole) - tests: tools/test/gpage_test.c guest probe; docs + STATE-CURRENT record the live green (G2H/W2G with semaphore release, guest observed the write, smoke ALL OK 64/64, clean latched release)
* docs: add complete SBOM, ignore local deployment resources, remove stale ↵Arthur Hanson Rasmusson10 days
| | | | third-party references
* gsp-phys: freeze-safe release, boot-proof READY, and guest-wiring P2/P3/P5-wave1Arthur Hanson Rasmusson11 days
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Host-freeze fix bundle (validated 2/2 supervised cycles): - power unlock now latches D0/D3cold by default (new gsp_phys_repower, default 0); releasing the claim can no longer power-gate the board and hard-freeze the host on resume - bounded post-rebind readiness gate before dropping the locks; bounded D0 settle/verify before the unbind - READY means a live GSP-RM session: the async worker and the module-owned join only expose READY when init-done is seen and no unload was sent; otherwise the claim is released fail-open - FWSEC reads DMEM0/IMEM back before STARTCPU and fails fast when the staging is not visible - the claim harness leaves the board latched by default and takes --restore-power to opt back into the old restore Guest-wiring: - P2: generation-keyed fn65 static-config snapshot cache plus a default-off identity overlay (new gsp_phys_static_live) for name/short-name/VBIOS; the probe cycle runs once per backend generation at READY - P3: default-off read-only RM_CONTROL forwarding whitelist (new gsp_phys_ctrl_forward) with emulated-handle translation to the adopted server handles and full emulation fallback - P5 wave 1: default-off shadow execution of guest CE pushes on the ladder channel (new gsp_phys_work_forward) via a dedicated ordered work item; the ladder stage-4 submission is refactored into a shared bounded helper and the software release path stays authoritative Live: module-owned boot to init-done, guest smoke ALL OK 64/64 with P2/P3 enabled, 514 shadow copies observed on the physical CE; all cycles released cleanly with WPR2 down and no reboot.
* guest-diag: treat the benign TX-header status line as non-fatal in the claim ↵Arthur Hanson Rasmusson11 days
| | | | harness
* guest-diag: add --nocat for the next diagnostic bootArthur Hanson Rasmusson11 days
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* guest-diag: allow selecting the staged GSP firmware with --fwArthur Hanson Rasmusson11 days
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* guest-diag: add --boot/--boot-dryrun/--keep to the claim harnessArthur Hanson Rasmusson11 days
| | | | --boot is the only device-writing mode (full boot lifecycle: FWSEC, Booter Load, RISC-V start, FALCON_OS, RM-init poll). --boot-dryrun rehearses the host staging read-only. --keep leaves a green claimed session running. --fwsec is retired and refused at parse time: a FWSEC-only carve is not host-recoverable on this part.
* guest-diag: add --fwsec to the supervised claim harness (stage-3c write run)Arthur Hanson Rasmusson11 days
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* gsp-phys: read-only FWSEC dry-run mode; match the 6-byte BIT token decodeArthur Hanson Rasmusson11 days
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* guest-diag: reusable supervised physical-claim cycle harness (D0 pre-lock + ↵Arthur Hanson Rasmusson12 days
| | | | abort checks)
* guest-diag: PD-watch cycle (dst-keyed root-PD watch + park-time shadow dumps)Arthur Hanson Rasmusson12 days
| | | | | | | | Reproducible TASK 2 harness: fresh boot, sema_dbg=Y with sema_copy_dst=0x200000 / sema_copy_dst2=0x208000, cdt2 parked at CDT_CP_PAUSE so the root PD/PT pages can be dumped and walk_probe run while the client is live. Prints the offending write data (prov= names the translation layer) and the post-run walk state.
* guest-diag: stream the client's high-VA UVM sysmem pages as pinsArthur Hanson Rasmusson12 days
| | | | | | | | | The DtoH staging buffer lives in the client's high-VA /dev/zero|nvidia mappings (e.g. devptr+0x3c00100), outside the scanner's fixed CE/GR windows; only the host's pagemap read can see it. The guest scanner now walks those VMAs and streams their present pages so the module pins them. run_cycle.sh learns the sema_dbg master switch (auto-on when any watch knob is set).
* guest-diag: retry the guest pin-scanner startup (a transient agent exec ↵Arthur Hanson Rasmusson12 days
| | | | failure left a boot without pins and the client hung)
* guest-diag: mount tracefs before installing kprobesArthur Hanson Rasmusson12 days
| | | | | | A fresh boot can leave /sys/kernel/tracing as an unmounted mount point; the probe adds then fail silently (probe count 0) and the whole sem/kptr pipeline goes blind.
* guest-diag: reset per-client pin state when a new client pid appearsArthur Hanson Rasmusson12 days
| | | | | | | A new CUDA client allocates fresh channel pools at the same GPU VAs; the watcher kept the previous client's sem kptrs and seen-pin marks, so it pinned the previous (freed) pool pages and the new client's release writes went to dead memory. Clear the learned sems/marks on each pid change.
* guest-diag: pin scanner matches va* clients too (static-cudart vectorAdd)Arthur Hanson Rasmusson12 days
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* guest-diag: cycle monitor CPUs on kernel-VA translation failureArthur Hanson Rasmusson12 days
| | | | | | | | | HMP x/gva2gpa translate with the selected vCPU's CR3; while that CPU runs user code under PTI the kernel half is hidden, so kernel-VA reads (the tracking-sem chain and the CE pushbuffer CPU alias) fail and the pin pass aborts. Try the other vCPUs before giving up: during an active CUDA client at least one CPU is in kernel mode, so the chain/pin work no longer require the client to be parked in sleep().
* guest-diag: pin scanner matches cdt* so the copy-path test binary is trackedArthur Hanson Rasmusson12 days
| | | | | | | The GR-window pin scanner matched comm=="cdt" exactly, so runs using the cuda_drv_test2 binary (comm "cdt2") never streamed their mappings: the GR push pages stayed unresolvable and the client stalled in context creation. Match the cdt prefix instead.
* sema-svc: decode GRCE inline-data DMA (small HtoD path)Arthur Hanson Rasmusson12 days
| | | | | | | | | | | | | | | | | | The 256-byte cuMemcpyHtoD payload never appears in any CE push: CUDA submits it on the compute channel as a compute-class DMA whose source is the push's own inline data (LINE_LENGTH_IN=256, OFFSET_OUT=<device VA>, LAUNCH_DMA=0x41, LOAD_INLINE_DATA 64 dwords, then the channel's SET_REPORT_SEMAPHORE release). The CE-shaped decoder skipped the data run (opcode 3) and no GR work ran at all. - Decode NVC5C0 GRCE methods on subchannel 1 (LINE_LENGTH_IN, LINE_COUNT, OFFSET_OUT/UPPER, LAUNCH_DMA) and the opcode-3 LOAD_INLINE_DATA run. - svc_grce_inline_write resolves the destination VA through trusted sources (pins, map, published page directories, targeted rm_mem resolve), pins the page and writes into vidmem or guest RAM; budgeted sema-grce logs name the target or report UNRESOLVED. - cdt2 test binary gains CDT_CP_PAUSE / CDT_HP_PAUSE for live inspection of the copy path; pushed by push_guest_tools.sh.
* sema-svc: run CE work before its release, grace unreadable CE entries, ↵Arthur Hanson Rasmusson12 days
| | | | | | | | | | | | | | | | | | | payload-pattern audit - CE LAUNCH_DMA releases are now applied after the push's collected work runs: the client reads copied data as soon as it observes the release, so release-first let cuMemcpyDtoH observe a copy that had not executed. - Unreadable CE entries stay pending for a grace window (sema_ce_grace_ms, default 8s) before the release fallback consumes them, so a translation that lands within a service pass lets the push be decoded and its work executed instead of being dropped. - sema_copy_pat matches an 8-byte value against every copy's src/dst first word and scans decoded pushes for it, naming the submission that carries a known payload regardless of size/encoding. - sema-dma-skip logs transfer-shaped launches that collect no op; op log lines carry the channel handle; LAUNCH_DMA inventory follows OPS_LOG. - A real release application now records the release VA, so decoded pushes no longer trigger a spurious fake release.
* guest-diag: cdt CDT_WAIT park-at-end (live memory inspection); run_cycle ↵Arthur Hanson Rasmusson12 days
| | | | CDT_WAIT passthrough
* guest-diag: pushbuffer pin survives PTI holes (full-range scan + bounded ↵Arthur Hanson Rasmusson12 days
| | | | retries until complete)
* sema-svc: sema_copy_watch (size-keyed src/dst byte audit for the CE data path)Arthur Hanson Rasmusson12 days
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* sema-svc: sema_ops_log param (default 8) to audit executed CE operands; ↵Arthur Hanson Rasmusson12 days
| | | | run_cycle OPS_LOG knob
* guest-diag: run_cycle enables semfix pushbuffer chain walk by default (CE ↵Arthur Hanson Rasmusson12 days
| | | | window has no CPU alias; the vsock stream cannot supply it)
* guest-diag: run_cycle SKIP_OPS knob + cdt output on serial; cdt richer ↵Arthur Hanson Rasmusson12 days
| | | | roundtrip diagnostics
* guest-diag: bpz21 - dump the FUN_00337e60 info array from FUN_00550ff0Arthur Hanson Rasmusson12 days
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* guest-diag: bpz20 - watchpoint on ds+0xe94 to catch the zeroing writeArthur Hanson Rasmusson12 days
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* guest-diag: push bpz18Arthur Hanson Rasmusson12 days
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* guest-diag: run_cycle gdb-launch mode + bpz18 early path traceArthur Hanson Rasmusson12 days
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* guest-diag: bpz19 - attach-mode path trace through FUN_0042aec0Arthur Hanson Rasmusson12 days
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* guest-diag: bpz16 - live-probe chip-info vtable + 0xc48/0xc4c at the failing ↵Arthur Hanson Rasmusson12 days
| | | | call
* guest-diag: bpz14 - dump guest TPC/SM count fields at the failing clock ↵Arthur Hanson Rasmusson12 days
| | | | validation
* guest-diag: bpz13 - dump FUN_003e35f0 clock-arg validation at the failing callArthur Hanson Rasmusson12 days
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* guest-diag: run_cycle - verify live gdb before declaring arm failureArthur Hanson Rasmusson12 days
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* guest-diag: bpz12 - trace call returns in FUN_00386b90 (failing section ↵Arthur Hanson Rasmusson13 days
| | | | callback)
* guest-diag: bpz11 - trace every call return inside FUN_00391ee0Arthur Hanson Rasmusson13 days
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* guest-diag: bpz10 - trace every call return inside FUN_003e90c0Arthur Hanson Rasmusson13 days
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* guest-diag: bpz9 - split the failing ucode image create (FUN_003e99d0)Arthur Hanson Rasmusson13 days
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* guest-diag: run_cycle - retry gdb arming (transient agent timeouts)Arthur Hanson Rasmusson13 days
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* guest-diag: bpz8 - localize the ucode-load failure inside FUN_00e21850Arthur Hanson Rasmusson13 days
| | | | | | | Run #7 proved the membar-WAR descriptor lookup succeeds in the guest (remap (7,5)->(7,0)); FUN_00e21850 then returns 1. bpz8 breaks after its two inner calls (FUN_003e99d0 image create, FUN_003dfae0 image load) to name which one fails.
* guest-diag: bpz7 - split membar hook failure into lookup vs ucode loadArthur Hanson Rasmusson13 days
| | | | | | | | Host oracle (real TU104, 570.211): FUN_0035a4d0(0x13,7,5) succeeds because the 3-entry remap table at 0x3dc5b80 maps (7,5)->(7,0); the guest has the same table. bpz7 breaks before/after the lookup and the FUN_00e21850 ucode load in FUN_005d7e70 to see which one fails in the guest. Also fix invd.py's lookup address (0x25a4d0, not 0x35a4d0).
* guest-diag: bpz6/invd - read the live arch/impl and test the WAR-ucode lookupArthur Hanson Rasmusson13 days
| | | | | | | | | Run #5 named the failing hook: idx=3 FUN_005d7e70 ('membar_war_bug2022401') returned 999; its only source is FUN_0035a4d0(0x13, dev+0xc50, dev+0xc54) returning NULL or the ucode load failing. bpz6 reads the live device state arch/impl at the failure and evaluates the lookup in-process, scanning (arch,rev) pairs to show which WAR-ucode descriptors exist; invd.py is the standalone same-probe for a parked cdt.
* guest-diag: bpz5 - name the failing engine-setup hook (slot+0x4580)Arthur Hanson Rasmusson13 days
| | | | | | | Run #4 identified the +0x4580 target as file 0x4d1fa0: it runs four descriptors 0x440f780/7c0/800/840 whose fns are 0x4d9350, 0x4c8a70, 0x4ad980, 0x4d7e70 and returns the first non-zero status. bpz5 breaks on the hook call/return and prints the failing index, target and status.
* guest-diag: bpz4 - identify the vtable slot+0x4580 that returns 999Arthur Hanson Rasmusson13 days
| | | | | | | Run #3 named the failing store: file 0x275cec, the indirect call at 0x275ce6 (slot +0x4580 of the table at [ctx+0x40], called with (ctx, obj+0xb8)) returned 0x3e7. bpz4 prints the runtime target pointer so it maps to the architecture vtable implementation that failed.
* guest-diag: bpz3 - probe every r14d store in the ctx bring-up (85 sites)Arthur Hanson Rasmusson13 days
| | | | | | | Run #2: all post-pump call sites up to 0x2755bf returned 0, but FUN_00374240 returned r14d=0x3e7 (999) 554 ms later. bpz3 arms every mov %eax,%r14d store in FUN_00374240 plus the alternate epilogue and the single direct 999 store, printing the first non-zero status with a backtrace.
* guest-diag: post-pump ctx-init status probes (bpz/bpz2 gdb scripts)Arthur Hanson Rasmusson13 days
| | | | | | | | bpz.py probes the four known rc=999 stores on the cuCtxCreate path plus the scanner force sites; the live run eliminated all of them and showed the engine event pump (FUN_0031a3b0) returning success. bpz2.py probes every post-pump status store in the ctx bring-up (FUN_00374240) and the function's final return, printing the first non-zero status with a backtrace.
* guest-diag: UVM API kretprobe installer (retval probes for the ↵Arthur Hanson Rasmusson13 days
| | | | failure-instant trace)
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