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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-06-01 21:35:14 +0200 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-06-01 21:35:14 +0200 |
| commit | 3e4c5a6261770bced301b5e74233e7866166ea5b (patch) | |
| tree | 9379fddaba693ef8a045da06efee8529baa5f6f4 /gitlab/issues_text/target_missing/host_missing/accel_missing/2968 | |
| parent | e5634e2806195bee44407853c4bf8776f7abfa4f (diff) | |
| download | qemu-analysis-3e4c5a6261770bced301b5e74233e7866166ea5b.tar.gz qemu-analysis-3e4c5a6261770bced301b5e74233e7866166ea5b.zip | |
clean up repository
Diffstat (limited to 'gitlab/issues_text/target_missing/host_missing/accel_missing/2968')
| -rw-r--r-- | gitlab/issues_text/target_missing/host_missing/accel_missing/2968 | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/gitlab/issues_text/target_missing/host_missing/accel_missing/2968 b/gitlab/issues_text/target_missing/host_missing/accel_missing/2968 deleted file mode 100644 index 1b49d64bb..000000000 --- a/gitlab/issues_text/target_missing/host_missing/accel_missing/2968 +++ /dev/null @@ -1,22 +0,0 @@ -Regression: x-igd-opregion=off ignored in VFIO IGD quirk handling -Description of problem: -A regression in QEMU’s VFIO IGD initialization causes the `x-igd-opregion=off` parameter to be ignored, resulting in an error when passing through an Intel iGPU SR-IOV Virtual Function (VF) at PCI address `00:02.1`: `qemu-system-x86_64: -device vfio-pci,host=0000:00:02.1,...: Device does not supports IGD OpRegion feature: No such device` -Automatic detection of IGD-OpRegion assumes any Intel iGPU (including GVT-g) will have it but SR-IOV VFs do not. -Steps to reproduce: -1. Configure an Intel iGPU with SR-IOV enabled, creating a VF at `00:02.1`. -2. Bind the VF to the `vfio-pci` driver: -``` - echo 0000:00:02.1 > /sys/bus/pci/drivers/i915/unbind - either: - echo "8086 4680" > /sys/bus/pci/drivers/vfio-pci/new_id - or: - echo 0000:00:02.1 > /sys/bus/pci/drivers/vfio-pci/bind -``` -3. Run QEMU with the command line above, including `-device vfio-pci,host=0000:00:02.1,...,x-igd-opregion=off`. -Additional information: -- **Hardware details**: - - `00:02.1 VGA compatible controller [0300]: Intel Corporation AlderLake-S GT1 [8086:4680] (rev 0c)` - - Host motherboard: MSI PRO Z690-A DDR4 - - CPU: Intel Core i5 12600K -- **Regression cause**: The issue was introduced by commit 7be29f2f1a3f5b037d27eedbd5df9f441e8c8c16, which changed `vfio_pci_igd_config_quirk` to detect OpRegion automatically, ignoring `vdev->igd_opregion=false`. -- **Proposed fix**: I have a patch that adds checks for `vdev->igd_opregion` in `vfio_pci_igd_config_quirk` and `vfio_pci_kvmgt_config_quirk`, skipping OpRegion handling when `x-igd-opregion=off`. The patch has been tested, confirming the VM starts without errors. I will submit it to qemu-devel@nongnu.org with a reference to this issue. |