Untrack legacy trees and purely legacy docs (kept locally)

- patches/ -> legacy-patches/ (gitignored)
- legacy-driver-guest/ (old guest vGPU driver, gitignored)
- docs/old/ (superseded architecture write-up, gitignored)
- docs that only reference the legacy components stay tracked; their path
  references now point at legacy-patches/
- install.sh PATCH_DIR updated

1 files changed, 13 insertions, 4 deletions

diff --git a/.gitignore b/.gitignore
index 42849ec..8d5c51d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,13 +40,22 @@ userspace/examples/example_vgpu
 userspace/tests/*_test
 
 # ----------------------------------------------------------------------------
-# NVIDIA open-gpu-kernel-modules (vendor tree)
-# Cloned at a pinned tag and patched by install.sh - see patches/nvidia/
+# NVIDIA open-gpu-kernel-modules (public upstream)
+# Cloned at a pinned tag and patched by install.sh - see legacy-patches/nvidia/
 # ----------------------------------------------------------------------------
 /nvidia-open-gpu-kernel-modules/
 
-# NVIDIA open-gpu-kernel-modules @ 570.144 (local checkout of the open kernel modules
-# driver's exact wire protocol - used by kernel/gsp_rm_emulation.c)
+# Legacy NVIDIA patches (kept locally, no longer tracked)
+/legacy-patches/
+
+# Legacy guest driver (gsp-vgpu.ko, superseded by stock guest driver; kept
+# locally, no longer tracked)
+/legacy-driver-guest/
+
+# Purely legacy docs (describe the superseded guest-driver architecture)
+/docs/old/
+
+# Local checkout of the open kernel modules @ 570.144 (not tracked)
 /nvidia-570.144-reference/
 
 # rmq build artifact (source stays)