| Commit message (Collapse) | Author | Age |
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copies
- new default-off gsp_phys_work_defer_release: a forwarded guest push's
releases are recorded and its GPFIFO entry is held (no consume, no
GP_GET write, no counter publish/stall) until the work item publishes
completion; the service thread then delivers the releases, with a
fallback on failure/timeout (500 ms cap enforced every pump pass)/
pause/quiesce/channel-delete
- new default-off gsp_phys_work_hw_primary: the software copy is skipped
for forwarded ops, so the physical engine authors the data; a once-only
software copy runs before the releases on any hardware failure or when
the request cannot be queued
- release-apply helpers extracted; exactly-once latches; channel-delete
and teardown handling; counters and a work_guard state line
- live: deferred-release run engaged=75 applied=75 timeouts=0 with the
full smoke green; hardware-primary run req=100 ok=100 verify_ok=100
fallback=0 copy_skipped=119 copy_fail=0, smoke ALL OK 64/64 (guest read
data the engine authored), with 19 fail-closed inline software
fallbacks under single-inflight contention; a range-unregistered run
proved the fallback (121 skipped copies, all recovered, smoke green)
- defaults off; the software path and all existing guards unchanged
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- 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)
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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.
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Add the gsp_phys_mdev_owned ownership selector (default 0: unchanged
load-time module-owned claim/boot). With 1, module load claims nothing;
the first mdev create starts a refcounted backend session whose
claim+boot runs asynchronously from a work item, so mdev create and
init_work never block. The last mdev remove releases after the emulation
thread is stopped. Failures are fail-open: the backend stays OFF and the
mdev keeps serving the emulation path.
nv_vgpu_exit now gates the session STOPPING under the session lock,
drains the emulation threads via mdev_unregister_driver(), and only then
releases the claim; the module-owned path keeps its previous release
position. A start while STOPPING is refused and a concurrent second
stopper cannot release twice. No forwarding is added.
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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.
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