From 6aadb593750736f239fd54a0ccef4b3834c08fc4 Mon Sep 17 00:00:00 2001
From: Arthur Hanson Rasmusson <arthur@vgpu.io>
Date: Mon, 21 Sep 2026 18:01:55 -0400
Subject: kernel: GSP-RM msgq emulation + TU104 hardware tables
 (GET_GSP_STATIC_INFO, GSP_RM_CONTROL)
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Implements the GSP-RM reply content layer for the msgq RPC channel:

- kernel/gsp_rm_emulation.c/h: GSP-RM msgq emulation engine
  - Queue chain discovery (libos args → RMARGS → GSP_ARGUMENTS_CACHED)
  - Status queue link + GSP_INIT_DONE emission
  - Command queue polling + RPC dispatch
  - SET_GUEST_SYSTEM_INFO version negotiation (VGX 41.12)
  - GET_GSP_STATIC_INFO(65) with 1656-byte GspStaticConfigInfo
  - GSP_RM_CONTROL(76) sub-command dispatch:
    - FIFO_GET_DEVICE_INFO_TABLE (0x20801112)
    - INTERNAL_INTR_GET_KERNEL_TABLE (0x20800a5c)
    - GPU_GET_CONSTRUCTED_FALCON_INFO (0x208001b0)
    - INTERNAL_GET_DEVICE_INFO_TABLE (0x20800a40)

- kernel/gsp_rm_tu104.h: TU104 hardware tables
  - 12-entry FIFO engine table (GR0, CE0-4, NVDEC0-1, NVENC0, SEC2, NVJPG, SW)
  - 8-entry interrupt table (from intr_phys_tu102.c)
  - 1-entry constructed falcon table (FBFLCN)
  - 11-entry internal device info table
  - GspStaticConfigInfo layout (1656 bytes, ABI-verified offsets)
  - Data from NVIDIA driver material (ext-tree) + hwref/turing/tu104

- tools/rmq/: Userspace RM API client (oracle for ground-truth tables)

KNOWN ISSUE: gsp_rm_send crashes (fortify_panic) on multi-element messages
when reply data exceeds one 4096-byte queue element. Affects cmd 0x20800a41
(paramsSize=8204). Multi-element splitting is the next fix.
---
 tools/rmq/Makefile | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 tools/rmq/Makefile

(limited to 'tools/rmq/Makefile')

diff --git a/tools/rmq/Makefile b/tools/rmq/Makefile
new file mode 100644
index 0000000..f58e4d9
--- /dev/null
+++ b/tools/rmq/Makefile
@@ -0,0 +1,19 @@
+# rmq - RM query tool (userspace RM API client)
+#
+# Queries the host NVIDIA Resource Manager via /dev/nvidia0 ioctls.
+# Used as an "oracle" to extract ground-truth static GPU data (device info
+# tables, static config) from the host's real GSP-RM for the GSP-RM emulation
+# layer (kernel/gsp_rm_emulation.c).
+
+CC      ?= gcc
+CFLAGS  ?= -O2 -Wall
+
+all: rmq
+
+rmq: rmq.c
+	$(CC) $(CFLAGS) -o $@ $<
+
+clean:
+	rm -f rmq
+
+.PHONY: all clean
-- 
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