tools/vk + nvkmstrace: real-Vulkan probe stack for the emulated vGPU - vk_probe/vk_probe2 (ctypes loader probes: enumerate + create device/queue), vk_frame (headless Vulkan compute renderer: loads the NVIDIA ICD, paints a plasma into an RGBA8 storage image, reads it back to PPM and publishes frames into the kvmfr ivshmem BAR), vk_plasma.comp -> SPIR-V; nvkmstrace.c (LD_PRELOAD NVKMS ioctl logger that decoded the vkCreateDevice failure to ALLOC_DEVICE cmd=0). Measured: the NVIDIA device enumerates and its Vulkan ICD loads (2 ICDs: NVIDIA + llvmpipe); vkCreateDevice fails VK_ERROR_INITIALIZATION_FAILED because nvKmsAllocDevice returns non-success after the display shim

1 files changed, 17 insertions, 0 deletions

diff --git a/tools/vk/vk_plasma.comp b/tools/vk/vk_plasma.comp
new file mode 100644
index 0000000..fe6b3ac
--- /dev/null
+++ b/tools/vk/vk_plasma.comp
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: BSD-3-Clause
+// vk_plasma.comp - compute-shader frame painter for the Vulkan guest test.
+#version 450
+layout(local_size_x = 16, local_size_y = 16) in;
+layout(set = 0, binding = 0, rgba8) uniform writeonly image2D fb;
+layout(push_constant) uniform PC { float t; float w; float h; float pad; } pc;
+void main() {
+    ivec2 p = ivec2(gl_GlobalInvocationID.xy);
+    if (p.x >= int(pc.w) || p.y >= int(pc.h))
+        return;
+    vec2 uv = vec2(p) / vec2(pc.w, pc.h);
+    float v = sin(uv.x * 12.0 + pc.t * 2.0) * cos(uv.y * 9.0 - pc.t * 1.7);
+    float r = 0.5 + 0.5 * sin(pc.t + uv.x * 6.2831);
+    float g = 0.5 + 0.5 * sin(pc.t * 1.3 + uv.y * 6.2831);
+    float b = 0.5 + 0.5 * v;
+    imageStore(fb, p, vec4(r, g, b, 1.0));
+}