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authorChristian Krinitsin <mail@krinitsin.com>2025-06-01 21:35:14 +0200
committerChristian Krinitsin <mail@krinitsin.com>2025-06-01 21:35:14 +0200
commit3e4c5a6261770bced301b5e74233e7866166ea5b (patch)
tree9379fddaba693ef8a045da06efee8529baa5f6f4 /gitlab/issues_text/target_missing/host_missing/accel_missing/553
parente5634e2806195bee44407853c4bf8776f7abfa4f (diff)
downloadqemu-analysis-3e4c5a6261770bced301b5e74233e7866166ea5b.tar.gz
qemu-analysis-3e4c5a6261770bced301b5e74233e7866166ea5b.zip
clean up repository
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diff --git a/gitlab/issues_text/target_missing/host_missing/accel_missing/553 b/gitlab/issues_text/target_missing/host_missing/accel_missing/553
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-Virtio-vga with blobs on fails, when qemu compiled with enabled modules
-Description of problem:
-When using qemu configured with `--enabled-modules` and starting qemu with command line above, qemu crashes with following output:
-```
-qemu-system-x86_64: -device virtio-vga,blob=on: cannot enable blob resources without udmabuf
-```
-While qemu configured without `--enabled-modules` runs this command successfully.
-Steps to reproduce:
-1. Get latest qemu source code
-2. Build qemu `mkdir build && cd build && ../configure && ninja`
-3. Check if following command runs without errors and show sdl qemu window
- ```
- sudo ./qemu-system-x86_64  \
-      -object memory-backend-memfd,id=mem1,size=512M \
-      -machine memory-backend=mem1 \
-      -display sdl \
-      -device virtio-vga,blob=on
-
- ```
-4. Then try to build with modules enabled  `mkdir build && cd build && ../configure --enable-modules && ninja`
-5. Try to do step 3 again
-Additional information:
-I tried to debug this bug, and found that problem is with function `virtio_gpu_have_udmabuf`: when qemu is build without modules this function is from `hw/display/virtio-gpu-udmabuf.c` (which is correct), but when qemu compiled with modules this function comes from `stubs/virtio-gpu-udmabuf.c` and when `hw-display-virtio-gpu.so` is loaded, `virtio_gpu_have_udmabuf` is not replaced, and remains function from stub (which always return 0) and command fails.
-
-I think I will submit patch that fix it tomorrow