Dustin C. Hatch
4900085a1c
When running inside a QEMU microvm with the source directory shared via 9pfs, the kernel build process fails > Error: Could not mmap file: vmlinux Thus, we need to run the build in a path on a local filesystem. To support this, the Makefile now supports an `O` option, and all the build scripts have been adjusted to make use of it as needed. Since building in a local filesystem would ultimately discard the final artifacts when the VM terminates, we need yet a different location for the files we want to keep. The `IMAGESDIR` option can be used to specify this path. This path can be on a shared filesystem, thus saving the artifacts outside the microvm.
Errors
SWIOTLB Buffer
OF: reserved mem: failed to allocate memory for node … Can not allocate SWIOTLB buffer earlier and can't now provide you with the DMA bounce buffer
Ensure start_x=1 is in config.txt and start_file/fixup_file are not
specified.
U-Boot: Overwrite Reserved Memory
** Reading file would overwrite reserved memory **
Set CONFIG_LMB_MAX_REGIONS=16 in u-boot/.config