Open-IOV vGPU-IO: host-side GSP emulation for unmodified NVIDIA guest drivers https://git.vgpu.io/open-iov.git/atom?h=golden-replay 2026-10-02T19:13:06+00:00 2026-10-02T19:13:06+00:00 Arthur Hanson Rasmusson arthur@vgpu.io 2026-10-02T19:13:06+00:00 urn:sha1:c9bf1cf098c8ea4daeb3e6c9b274a9025c03045d - 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). 2026-09-28T19:32:28+00:00 Arthur Hanson Rasmusson arthur@vgpu.io 2026-09-28T19:32:28+00:00 urn:sha1:d6581109e3ef2d7848b9efd5ae42b7c9facefee8 The 15 s pinner loses the race against the client's internal deadline in most boots: in the one boot where UVM's page-table write pushes were submitted the pin had landed early, and later pins (60 s+) left the client dead before submitting anything. Poll the guest pagemap every 2 s and pin 0x20400f000 once per cdt pid (re-pinning the same pid also stirred the pump's rewind repeatedly, which is why the guard exists).