open-iov.git/kernel/gsp_phys_registry_img_srvctx.h, branch cs-share Open-IOV vGPU-IO: host-side GSP emulation for unmodified NVIDIA guest drivers https://git.vgpu.io/open-iov.git/atom?h=cs-share 2026-10-05T16:12:47+00:00 vgsp: GR ladder shared-VAS page-table install and server-managed ctx commit path 2026-10-05T16:12:47+00:00 Arthur Hanson Rasmusson arthur@vgpu.io 2026-10-05T16:12:47+00:00 urn:sha1:a9fd600193b2cb4d4393a2600f8ff9fc973fecdf - DMA_UPDATE_PDE_2 client control installs the ladder leaf PT through the server's own MMU walker on the shared-management VAS (the raw-PDB entries are not preserved by the root migration); FLUSH_PDE_CACHE + post-install refill + PT diagnostics. - srvctx registry profile also disables split VAS management; MAP_MEMORY_DMA is not served by GSP-RM for this client (NV_ERR_INVALID_FUNCTION), so the PDE control replaces it. - shared-path context commit helper: GPU_INITIALIZE_CTX + PA-only GPU_PROMOTE_CTX for the server-reported (or client fallback) MAIN buffer; GR_GET_CTX_BUFFER_INFO sends bufferCount=64. - Result: shared VAS + srvctx no longer wedges; channel/BIND/schedule/token green, PBDMA fetches the GPFIFO (GPGet=1); remaining wall is ROBUST_CHANNEL_GR_FAULT_DURING_CTXSW (0x2c). kernel: GR context-promote bisection modes 4-17 and server-managed-ctxbuf registry variant; complete vgsp rename; docs/tooling refresh 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).