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authorArthur Hanson Rasmusson <arthur@vgpu.io>2026-10-02 15:13:06 -0400
committerArthur Hanson Rasmusson <arthur@vgpu.io>2026-10-02 15:13:06 -0400
commit4bb8550a72597ec098c6d62a75006a0aba61972e (patch)
treebd0ec74c26ff056251052a5e1ba0b59d14fb1f6a /docs/05-operations/02-debugging-and-maintenance-workflows.md
parent8b491c4e7ebde76c17faddaad47f92898d6c97de (diff)
downloadopen-iov-4bb8550a72597ec098c6d62a75006a0aba61972e.tar.gz
open-iov-4bb8550a72597ec098c6d62a75006a0aba61972e.zip
kernel: GR context-promote bisection modes 4-17 and server-managed-ctxbuf 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).
Diffstat (limited to 'docs/05-operations/02-debugging-and-maintenance-workflows.md')
-rw-r--r--docs/05-operations/02-debugging-and-maintenance-workflows.md14
1 files changed, 7 insertions, 7 deletions
diff --git a/docs/05-operations/02-debugging-and-maintenance-workflows.md b/docs/05-operations/02-debugging-and-maintenance-workflows.md
index b7aab25..cb3ea28 100644
--- a/docs/05-operations/02-debugging-and-maintenance-workflows.md
+++ b/docs/05-operations/02-debugging-and-maintenance-workflows.md
@@ -12,7 +12,7 @@ Three layers, in order of usefulness:
precisely what it expected and what it got (e.g. UVM's "Tracker entry for
value N … channel_init()"). Always start here.
2. **Host module trace** — every RPC and every emulation decision is logged
- with the `gsp-resman-vfio:` prefix. A full CUDA run produces a few hundred
+ with the `vgsp:` prefix. A full CUDA run produces a few hundred
lines that reconstruct the object tree and the control battery.
3. **Memory observation** — when the problem is in memory state (mappings,
semaphores, pushes), the module's debug parameters read and write guest
@@ -52,13 +52,13 @@ See the host-module doc for the full list. Canonical examples:
```bash
# Find where a value lives in guest RAM (e.g. a semaphore VA):
-echo 0x121000000 | sudo tee /sys/module/open_iov_vfio/parameters/scan_guest_ram
+echo 0x121000000 | sudo tee /sys/module/vgsp/parameters/scan_guest_ram
# Find a decoded method sequence in guest RAM:
-echo 0x1,0x21000000,0x1 | sudo tee /sys/module/open_iov_vfio/parameters/scan_seq
+echo 0x1,0x21000000,0x1 | sudo tee /sys/module/vgsp/parameters/scan_seq
# Write a value to a guest physical address (completing a semaphore release):
-echo 0x120299010,0x1 | sudo tee /sys/module/open_iov_vfio/parameters/poke_guest
+echo 0x120299010,0x1 | sudo tee /sys/module/vgsp/parameters/poke_guest
```
**Caution:** all guest-RAM operations run in a kernel thread context by design;
@@ -282,7 +282,7 @@ addresses into a new configuration — re-derive per firmware.
[`../06-portability/hardware-software-matrix.md` §6](../06-portability/hardware-software-matrix.md)).
* Add the new entry to the runtime signature database in
`kernel/firmware_analyzer.c` (`known_signatures[]`: version string, hashes,
- discovered addresses). This is what lets one `open-iov-vfio.ko` identify
+ discovered addresses). This is what lets one `vgsp.ko` identify
multiple firmware versions safely.
**5. Validate (same checklist every version).**
@@ -380,14 +380,14 @@ ordering; the quickstart and tool chooser are in the
| Symptom | Likely cause | First check |
|---------|--------------|-------------|
-| `insmod open-iov-vfio.ko: Unknown symbol` | missing prerequisite module (`mdev`) | `modprobe mdev vfio vfio_iommu_type1 vfio_pci` |
+| `insmod vgsp.ko: Unknown symbol` | missing prerequisite module (`mdev`) | `modprobe mdev vfio vfio_iommu_type1 vfio_pci` |
| mdev create `-EUSERS` | `available_instances` = 0 (leak) | `cat .../available_instances` |
| Guest: no PCI device | mdev not attached | QEMU command line for `sysfsdev=` |
| Guest: sees device, probe hangs instantly | BAR0 mmap PFN bug (fixed) | host `make_spte` WARN |
| Guest: probe hangs, no KVM warning | doorbell/RPC never consumed | host dmesg for the emulation thread and doorbell writes |
| Guest: RPC processed but driver still waits | MSI-X never delivered | `SET_IRQS wired` line; `irqs[0].trigger` non-NULL |
| Guest agent dead, QEMU alive | guest kernel wedge | gdbstub vCPU sampling (§3.7) |
-| `rmmod open_iov_vfio` hangs | leaked kthread / open fds | `ps -e \| grep gsp_emu`; mdevs still present? |
+| `rmmod vgsp` hangs | leaked kthread / open fds | `ps -e \| grep gsp_emu`; mdevs still present? |
| Guest Code 43 / probe fail (Windows) | config space / MSI-X details | config read/write logs |
| `pr_warn_ratelimited(... not supported in emulation mode)` | guest used a BAR_TRAP/MIGRATE RPC | expected fail-fast; wire a real handler if hot |