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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-07-03 07:27:52 +0000 |
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| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-07-03 07:27:52 +0000 |
| commit | d0c85e36e4de67af628d54e9ab577cc3fad7796a (patch) | |
| tree | f8f784b0f04343b90516a338d6df81df3a85dfa2 /results/classifier/deepseek-2/reasoning/hypervisor/1463 | |
| parent | 7f4364274750eb8cb39a3e7493132fca1c01232e (diff) | |
| download | emulator-bug-study-d0c85e36e4de67af628d54e9ab577cc3fad7796a.tar.gz emulator-bug-study-d0c85e36e4de67af628d54e9ab577cc3fad7796a.zip | |
add deepseek and gemma results
Diffstat (limited to 'results/classifier/deepseek-2/reasoning/hypervisor/1463')
| -rw-r--r-- | results/classifier/deepseek-2/reasoning/hypervisor/1463 | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/results/classifier/deepseek-2/reasoning/hypervisor/1463 b/results/classifier/deepseek-2/reasoning/hypervisor/1463 new file mode 100644 index 00000000..db1a596b --- /dev/null +++ b/results/classifier/deepseek-2/reasoning/hypervisor/1463 @@ -0,0 +1,19 @@ +<think> +Okay, so I need to classify this bug report for QEMU. Let's start by reading through the details carefully. + +The user reports that when using both ivshmem and a host-pci device in the VM, the boot fails. They've provided steps to reproduce and some observations. Without the host-pci device or without secure boot, it works fine, but adding both causes issues. The logs mention VFIO_MAP_DMA failed with "Invalid argument" and that the DMA mapping couldn't be done because the address isn't in any known range. + +VFIO (Virtual Function I/O) is related to managing virtual functions of devices, often used for passing through host devices to VMs. So when a host-pci device is added, QEMU uses VFIO to handle it. The error here seems to be that the DMA mapping from QEMU's perspective isn't matching what the kernel knows. + +Looking at the kernel logs, there are checks in vfio_iommu_type1.c where it verifies if the start and end addresses fall within the expected ranges. The problematic address is 0x385000000000, which doesn't fit into any known range, leading to the failure. + +So the issue isn't with translation of code (mistranslation) or assembly lowering. It's more about how QEMU interacts with the host's IOMMU for DMA mappings when using both ivshmem and VFIO-passthrough devices. + +The error is occurring at a low level, in the hardware interaction part, specifically during the DMA mapping process. This relates to how the hypervisor (QEMU) communicates with the kernel (VFIO subsystem). The problem isn't in user-mode code but rather in the device or IOMMU handling. + +Considering the categories provided: 'hypervisor' seems appropriate because it's about QEMU managing virtual devices and interacting with the host's IOMMU. Alternatively, 'device' could also fit since it's related to pci devices, but 'hypervisor' is more specific to QEMU's role in this scenario. +</think> + +The issue arises from a failure in VFIO_DMA mapping when both ivshmem and a host-pci device are used. This points to an interaction problem between QEMU (the hypervisor) and the kernel's IOMMU handling, specifically with DMA addresses. Therefore, the category is: + +hypervisor \ No newline at end of file |