Improve swiotlb case #4156
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Improve swiotlb case #4156
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Pull request overview
This PR enhances the verify_deployment_provision_swiotlb_force test case to support both SCSI and NVMe disk controllers with different swiotlb parameters, improves error handling for systems without Grub, and explicitly excludes Confidential VMs (CVMs) from testing. The swiotlb kernel parameter is critical for systems that require software I/O translation layer for DMA operations, and NVMe devices require larger bounce buffer pools due to higher I/O throughput.
- Adds disk controller type detection to apply appropriate swiotlb parameters
- Implements proper exception handling when GrubConfig is unavailable (e.g., non-Grub distributions)
- Restricts test to non-CVM environments as boot parameter modification is unsupported in CVMs
LiliDeng
approved these changes
Dec 16, 2025
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