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* gsp-phys: real GSP boot stages 3d/3e and the GSP-RM run-sequencer eventArthur Hanson Rasmusson11 days
| | | | | | | | Stage 3d stages the GSP-RM boot from host sysmem (FMC, radix3 over the GSP-RM ELF, signature, message queues, libos LOGINIT/LOGRM/RMARGS and GSP arguments) and runs Booter Load on SEC2: GSP RISC-V reset, libos mailbox, IMEM/DMEM direct load, BOOTVEC=0, M0==0, FALCON_OS, RISC-V active. Stage 3e links the status queue and polls for GSP-RM events; it now also executes the inline run-sequencer command buffer (event 0x1002) against BAR0 (REG_WRITE/MODIFY/POLL, DELAY, STORE, CORE_* including CORE_RESUME) and then waits for GSP_INIT_DONE 0x1001. Gated by gsp_phys_boot / gsp_phys_boot_dryrun (default off; the normal load path writes nothing). gsp_phys_fwsec=1 without gsp_phys_boot=1 is refused: a FWSEC-only carve cannot pass the booter-unload handoff gate. Release quiesces the GSP, runs the existing FWSEC-SB/booter-unload teardown and frees all staging. tools/gen_gsp_bindata.py decodes the public generated archives into the Booter Load image (prod signature patched at 0x8700) and the GSP-RM boot (FMC) image; both are self-checked at build time.
* gsp-phys: fix the booter-unload handoff seed (correct scratch register/access)Arthur Hanson Rasmusson11 days
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* gsp-phys: fix booter-unload teardown (WPR meta/args) so WPR2 is cleared on ↵Arthur Hanson Rasmusson11 days
| | | | release
* gsp-phys: set PCI bus-master for the claimed GPU (bootloader host DMA)Arthur Hanson Rasmusson11 days
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* gsp-phys: FWSEC failure diagnostics (falcon scratch/mailbox, DMEM/IMEM readback)Arthur Hanson Rasmusson11 days
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* gsp-phys: correct the FWSEC interface-patch size and staging loggingArthur 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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* gsp-phys: fix the WPR2-up release hand-back and tighten FWSEC/VBIOS checksArthur Hanson Rasmusson11 days
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* gsp-phys: stage 3c FWSEC via VBIOS BIT image plus failure recoveryArthur Hanson Rasmusson11 days
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* gsp-phys: decode the real FB size for the boot layout (stage 3b-prime)Arthur Hanson Rasmusson11 days
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* gsp-phys: hold a GPU runtime-PM reference across the claim window (udev ↵Arthur Hanson Rasmusson11 days
| | | | bind-event hardening)
* gsp-phys: harden the D0 lock (pre-lock readiness, no unlock without rebind, ↵Arthur Hanson Rasmusson11 days
| | | | strict board check)
* gsp-phys: keep the dGPU power domain in D0 across the claim/release handoffArthur Hanson Rasmusson11 days
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* gsp-phys: stage-3b boot layout plus a hazard gate for the claim pathArthur Hanson Rasmusson11 days
| | | | | | | | | | | | | | Stage 3b allocates the three coherent boot-argument pages and fills the 256-byte WPR metadata from the computed Turing FB layout; no device registers are written (uncommitted work from the previous session, committed as-is behind the new gate). The physical claim unbinds the distribution NVIDIA driver; on this host that power-gates the dGPU board and the re-bind can leave the GPU unresponsive and hard-freeze the system (observed twice, 2026-09-30, no crash record). The claim now refuses unless the new gsp_phys_hazard_ack module parameter is also set, so a stale command line cannot re-trigger it. See the hazard note at the top of gsp_phys_gpu.c.
* gsp-phys: boot-layout stage 3b - boot-argument pages, WPR meta and FB layout ↵Arthur Hanson Rasmusson11 days
| | | | (no device writes)
* gsp-phys: read-only falcon state probe for the boot rungArthur Hanson Rasmusson11 days
| | | | | | | Logs both falcons' run/halt bits, the RISC-V active bit, WPR2 up/down and the security-falcon mailboxes when the physical GPU is claimed. Verified live: GSP and SEC2 halted, RISC-V inactive, WPR2 down (HI=0). This is the read-only half of the real boot rung; no device state is written.
* gsp-phys: claim the physical GPU and stage real GSP firmware (backend rungs 1-2)Arthur Hanson Rasmusson11 days
| | | | | | | | | | | | | | | | Rung 1 (ownership): a default-off gsp_phys_gpu module param; on claim the distribution driver is released from 10de:1ed3, our pci_driver binds it, BAR0/1/3 are mapped and the falcon state is sampled; release unbinds ours and rebinds the distribution driver. Verified live: claim reads BOOT0=0x164000a1 with the falcon halted and mailboxes clear; rmmod rebinds nvidia and nvidia-smi stays healthy. Rung 2 (firmware): while the device is owned, gsp_phys_fw (default nvidia/570.211.01/gsp_tu10x.bin) is fetched with request_firmware, checked as ELF64 RISC-V, and its sections are logged (.fwimage, .fwversion, .fwsignature_tu10x). The image is held for the boot rung. The claim is default-off; the emulation path is unchanged.
* sema-svc: rewind replays may only be skipped when their release was deliveredArthur Hanson Rasmusson12 days
| | | | | | | | | | | | | | | | | | | | The per-put-epoch consumed-slot skip must not suppress a slot whose entry was consumed *without* delivering its release (the CE grace expiry in real mode): the driver-API smoke test's CE pushes are consumed unreadable before their ring pin lands and depend on the pin-batch rewind replaying them once the translation appears. The skip now applies only to slots whose consumption delivered a release: - tail consumption records a slot when the iteration decoded a release (svc_rel_count delta); the sweep-delivered entry_want consume and the fake-release consume always record - the grace-expiry consume records only when a recovery (fake or sema_rel_recover) delivered the release - svc_fake_release counts as a delivered release So real-mode replays still re-process undelivered entries, while the runtime-client case (readable pushes delivered immediately) keeps the fast path that removed the 8 s stalls.
* sema-svc: detect a decoded release by count, not by the (unchanging) VAArthur Hanson Rasmusson12 days
| | | | | | | | | | | | | | The pump decided "this push carried a release" by comparing the last decoded release VA before/after svc_decode_stream. Consecutive pushes on a channel release to the SAME tracking-semaphore VA (UVM's tracker pattern), so every push after the first read as release-less: the entry was held for the full CE grace window (observed: exactly one push consumed per 8 s, gating the whole runtime init; the release itself had already been applied by the decode, only the pump's bookkeeping stalled). svc_rel_count now increments on every decoded release (host sem block, REPORT_SEM block, CE launch-DMA release) and the pump compares counts at all three sites (initial decode, rescue re-route, rescued-page retry).
* sema-svc: never re-process a GPFIFO slot already consumed in the put epochArthur Hanson Rasmusson12 days
| | | | | | | | | | | | | | | | | | | A pin-batch rewind replays recently consumed entries. An old entry whose rescue cannot validate any candidate then sits in the CE grace path - and because the client's put has advanced since, the replayed entry no longer matches any "new" expectation: it waits the full 8 s grace, blocking every later entry behind it on that channel. Observed live: the first push of rank 0 re-processed and skipped twice, 38 s apart, while eight later pushes queued behind it. The pump now marks each consumed slot in a per-channel bitmap valid for the current put epoch (cleared when put wraps, so a recycled slot in the next epoch is processed normally) and consumes a replayed slot immediately. Rewinds still refresh readable entries; they simply no longer resurrect entries that were already handled. Evidence: real-release watcher cycle, replay-after-put-advance no longer produces 'skipping stale entry ... after 8000 ms grace' for old slots.
* sema-svc: consume rewind replays and sweep-delivered CE entries at onceArthur Hanson Rasmusson12 days
| | | | | | | | | | | | | | | | | | | | | Two stalls serialized the runtime client's init into one 8 s CE grace window per push: - a pin-batch rewind replays recently consumed GPFIFO slots; re-examining a consumed slot runs the rescue and then holds it for the full grace window again (observed: the same VA 'skipped after 8000 ms grace' twice, 38 s apart). The pump now records each consumed slot with the put value it was consumed at (32-entry per-channel replay ring, persisted across passes) and consumes a replayed slot whose producing put has not advanced immediately. - the content sweep applies releases from RAM pages before the pump reads their entries, so the pool advances past the entry's payload while it is pending. entry_want (recorded on first examination) now detects that on both the unreadable-rescue and the readable-no-release paths and consumes the entry instead of waiting the grace window. Evidence: real-release watcher cycle, pool semaphore advances no longer gated at 8 s intervals once the replay skip engages.
* sema-svc: validate pushes with the full method encoding; deliver releases ↵Arthur Hanson Rasmusson12 days
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the sweep already applied The runtime client's second push on each UVM copy channel starts with a NON_INC method (0x60080002, count 8) and its release method sits 0x50 bytes in. The stream validator accepted only INC (op 1) headers, so the readable page failed the plausibility gate and every content-rescue candidate for that VA failed the read-back validation - the client's tracking semaphore for the push never advanced and the runtime init parked. - one shared parser (svc_stream_parse) accepts INC/NON_INC (op 1/3), IMMD_DATA (op 4, header-only), ONE_INC (op 5) and END_PB_SEGMENT (op 7), and still requires an exact method boundary over the whole entry plus trailing zero padding - the strict end condition is what keeps the content rescue safe against firmware/allocator pages - svc_method_stream_plausible and svc_stream_full_ok both use it, so a real readable push is decoded directly and a rescued page validates - the decoder skips NON_INC/ONE_INC methods whole (including their data words) instead of resyncing word-by-word through the payload, which could misread data as headers and queue bogus work Follow-on: the content sweep applies releases from RAM pages ahead of the pump, so the pump's expected payload was already satisfied when it examined the entry; the CE grace path then held each entry for the full 8 s window before consuming it - one grace period per push, serializing the client's runtime init. The pump now records the expected payload when it first examines an entry (entry_want) and consumes the entry immediately once the pool advances past it, on both the unreadable-rescue and the readable-no-release paths. Evidence (fresh boot, real releases, watchers + kprobes, no fakes): cudaGetDeviceCount rc=0 in the runtime client, device-attribute walk proceeds, pool semaphores advance; before this change the client sat in the 0x20801702 service-interrupt loop for >6 min and never left device init.
* sema-svc: deliver UVM CE tracking releases without host-side pinsArthur Hanson Rasmusson12 days
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The runtime client's registration stalled when no guest-side pin scanner was running: the content rescue refused to run before the pool semaphore was translated (its expected payload was unlearned), and unreadable CE entries were consumed after two failed rescues ~40 ms apart, dropping the client's wait. The push pages then could not be found within the entry's grace window. - rescue: drop the learned-payload gate (the matcher only needs the channel rank and the release shape); keep unreadable CE entries pending for sema_ce_grace_ms instead of consuming after a fixed attempt count - expected payload: re-learn from the pool whenever it advanced (a deferred release could land after the first read, leaving the expectation stale) - matcher: require the expected payload exactly and validate the read-back stream carries it, so a recycled page of an older push cannot be pinned - scan: descending full-range pass (the work allocations live in the high RAM block) plus a +/-512 MB near pass around the verified push-buffer base - releases decoded with an untranslated semaphore are queued and applied when the page appears (svc_pending_add on both decode paths) - a CE push that reads as a plausible stream but carries no release for the channel is re-routed through the rescue instead of silently consumed - new module param sema_rel_recover (default off): after grace + rescue, apply the channel's expected tracking value so the client's wait clears; counter-visible as releases_recovered, distinct from sema_fake_rel Evidence: fresh boot, real releases, no host watcher, no kprobes - the six UVM CE first pushes are found by content rescue, their releases applied, and the client reaches cudaGetDeviceCount rc=0 (it then waits for the third push, which this change routes to the rescue).
* GSPRM CLK legacy controls: populate the domain queries the runtime clock ↵Arthur Hanson Rasmusson12 days
| | | | | | | | | | | | | | | | | | | | | | helper gates on The static CUDA runtime's device init failed with cudaErrorInitializationError even though every kernel ioctl returned 0: cuInit succeeded and then cuDeviceGetAttribute(ECC_ENABLED=36) returned CUDA_ERROR_NOT_FOUND (500). Tracing libcuda's clock-domain helper (libcuda+0xe8c410) shows it issues the CLK legacy controls 0x20809009/0x20809064/0x20809001 and bails with 500 when the replies do not carry the expected domain bits/entries; the dependent attribute getters (ECC_ENABLED, TOTAL_CONSTANT_MEMORY) then abort init. Reply to the three queries with the minimal fields the helper checks: bits 32|34 present in 0x20809009, non-zero domain entries at offsets 12/20/28/36 of 0x20809064, and a matching selector in 0x20809001. No frequencies are fabricated (all other fields stay zero). Verified in the guest with the stock 570.144 static-cudart vectorAdd client: cudaGetDeviceCount -> rc=0 (ndev=1), cudaSetDevice, cudaFree, three cudaMallocs and both HtoD copies all return rc=0; the client then parks in cudaDeviceSynchronize waiting for the (not yet forwarded) kernel launch.
* GSPRM BUS_GET_PCI_BAR_INFO: reply the canonical 8-entry params structArthur Hanson Rasmusson12 days
| | | | | | | | | | The control is cacheable in the guest kernel (RMCTRL_FLAGS_CACHEABLE) and rmapiControlCacheSet validates paramsSize against the canonical sizeof(NV2080_CTRL_BUS_GET_PCI_BAR_INFO_PARAMS) = 200. We replied only 8 + 4*24 = 104 bytes, so every reply tripped NV_ERR_INVALID_PARAMETER in rmapiControlCacheSet (rpc.c:9998) and the BAR-info cache entry was never populated. Zero-fill and report all eight NV2080_CTRL_BUS_PCI_BAR_INFO entries (count still 4).
* sema-svc: gate per-push/per-doorbell/RPC tracing behind default-off sema_dbgArthur Hanson Rasmusson12 days
| | | | | | | | | | | | | | | | | | A healthy run left dmesg dominated by per-operation lines (sema-push, sema-lda, sema-chan rel-apply, sema-grce, DOORBELL/BAR writes, GSPRM per-RPC lines, the teardown garbage-element stream). Introduce the module parameter sema_dbg (default 0) and route every high-frequency diagnostic through it; the finer-grained watch knobs (sema_ops_log, sema_copy_watch, sema_copy_pat, sema_copy_dst, sema_copy_dst2) only take effect while it is on. Boot stats, channel registrations, pin events and state changes stay unconditional. Also carries the per-side translation provenance (op_tr_src, printed as prov= in the destination-window watch) and the 16 KB destination window used to observe the guest's page-table writes. Verified: fresh boot + full cdt2 smoke test (64/64, ALL OK) leaves a 520-line dmesg with zero per-push/per-doorbell/per-RPC lines.
* sema-svc: hold and retry a readable push whose operand is under a targeted ↵Arthur Hanson Rasmusson12 days
| | | | RAM scan (the DtoH dst staging VA needs multiple scan slices)
* sema-svc: operand resolver gains the targeted rm_mem fallback; per-side ↵Arthur Hanson Rasmusson12 days
| | | | translation-miss tracing (the DtoH copy operand is the failing side)
* sema-svc: targeted 256-byte op + compute-channel release-block tracing (the ↵Arthur Hanson Rasmusson12 days
| | | | DtoH op is still invisible)
* sema-svc: log the LAUNCH_DMA push VA and injected/allow flags; widen the ↵Arthur Hanson Rasmusson12 days
| | | | op-failure log budget (the DtoH work path is invisible at the old caps)
* sema-svc: apply UVM increment releases once per GPFIFO slotArthur Hanson Rasmusson12 days
| | | | | | | | | | | UVM CE tracking semaphores start at a base value and each completed push adds the release payload (observed base 1 + payload 1 -> the client waits for 2). The absolute comparison (payload > cur) could not see the second push and the release was silently dropped, leaving cuInit/UVM stuck. Track applied GPFIFO slots in a per-channel bitmap (preserved across re-registration and the pump's snapshot write-back) so a pin-batch rewind replays entries without double-incrementing; rescued pages stay release-only and never mark a slot.
* sema-svc: execute CE-class work on host-injected compute pushes (the DtoH copy)Arthur Hanson Rasmusson12 days
| | | | | | | | cuMemcpyDtoH submits the copy as C5B5 methods bound on subchannel 0 of a compute channel (eng=0). allow_ops was false for every eng=0 channel, so the LAUNCH_DMA copy was decoded (and its release applied) but never executed, and the client read zeros. A host-injected translation is verified truth: allow CE work on those pushes too.
* sema-svc: GRCE write log budget follows sema_ops_log when raised (catch late ↵Arthur Hanson Rasmusson12 days
| | | | HtoD writes)
* sema-svc: CE op translation falls back to the GMMU walk for virtual operandsArthur Hanson Rasmusson12 days
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* sema-svc: decode GMMU PDE/PTE addresses with the real encoding (addr>>12 in ↵Arthur Hanson Rasmusson12 days
| | | | | | | | | | bits 32:8/53:8) The mask-and-keep decode dropped the left shift by 12, so every page-table child pointer and leaf resolved 16x too low and no GMMU walk ever produced a translation (walks_ok=0 on every boot). Verified against live page tables: directory entry 0x2020a -> table 0x202000, leaf 0x0600000000760001 (aperture VID, KIND=6) -> PA 0x7600000.
* sema-svc: destination-keyed copy watch (dump page-table writes)Arthur Hanson Rasmusson12 days
| | | | | | sema_copy_dst=dumps the source bytes of every copy whose destination falls in the given page, so the 32-byte page-directory updates the guest writes into vidmem can be read directly and their entry encoding learned.
* 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.
* sema-svc: copy-watch also logs dst8_after (write-effect check)Arthur Hanson Rasmusson12 days
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* sema-svc: sema_vidmem_find pattern search (CE data-path ground truth)Arthur Hanson Rasmusson12 days
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* 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_vidmem_dump param to inspect emulated vidmem (CE data-path audit)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
* sema-svc: CE operand translation consults pinned translations before the ↵Arthur Hanson Rasmusson12 days
| | | | scanned map (push-data memcopies were rc=-ENOENT; UVM inline writes now execute)
* gsp-rm: fill GR info indices 7/9/0x17/0x22 (libcuda clock-table path; e94 ↵Arthur Hanson Rasmusson12 days
| | | | TPC count)
* sema-svc: route 906f/report-semaphore releases to the exact GR counter slot ↵Arthur Hanson Rasmusson12 days
| | | | (all 20 channel releases now land), queue payloads that arrive before the slot pin
* gsprm: reply-latency logging + param dump cap; guest-diag: CDT_PAUSE, ↵Arthur Hanson Rasmusson12 days
| | | | watcher reaping, wider CE stream window
* sema-svc: deliver the tracking-sem payload for every consumed GPFIFO entryArthur Hanson Rasmusson12 days
| | | | | | | | | | | | | | | | | The client's UVM_REGISTER_GPU blocks in uvm_push_end_and_wait on the first CE channel's tracking semaphore (pool word 0x121000000) waiting for value 3. The pool payload stayed at 1 while the client pushed: the pump processed entries whose push bytes were unreadable or had no decodable release, so the release bookkeeping advanced (expected_sem_payload) but nothing was written to the pool page. Treat the GPU semantics as normative: each consumed GPFIFO entry on an engine channel releases the channel's tracking semaphore with the incrementing queued value. When the decoded stream carries no release and sema_fake_rel is enabled, deliver the expected payload through svc_fake_release() instead of only bumping the counter. Also initialize expected_sem_payload for a fresh pool page whose current payload is 0 (expected = 1) so the first push is deliverable from the start.
* sema-svc: wake the service thread on every injected pinArthur Hanson Rasmusson13 days
| | | | | | | The injection queue was only drained at the top of the service loop, which can be inside a multi-second pump/discovery pass; live runs showed the GR counter pins landing ~1 s after the client mapped the page, i.e. after its context-init deadline. Waking on enqueue drains the batch immediately.
* sema-svc: GR counter slots only from injected pins; route GR releases ↵Arthur Hanson Rasmusson13 days
| | | | | | | | | | | | | | | through the exact slot Live evidence: with the counter page pinned, counter_pa still resolved to a stale self-discovered page, so every release write went to memory the client never polls (host read back its own 1s; client's page stayed 0) and the client's context-init wait expired. The generic release path could also write through that stale translation. - svc_counter_autoreg / svc_counter_learn trust only the injected-pin table (svc_ipin_lookup); learn re-registers when the injected PA differs. - Releases whose target is in the GR counter VA range skip the generic translation write entirely and go through the injected-pin-backed slot.
generated by cgit v1.2.3 (git 2.39.1) at 2026-10-12 13:26:19 +0000