Closed babouFomb closed 4 years ago
Thank you for the issue.
On ARM64, executing memset() on a non-cached area causes a bus error. Therefore, udmabuf_test.c skips the clear test when udmabuf is specified as a non-cache area. This message indicates that the clear test was skipped "intentionally".
If you access udmabuf as a cache area, ignore this test result. If you access udmabuf as a non-cache area, do not use memset().
For details on bus error when executing memset() on non-cache area on ARM64, refer to the following URL (Japanese)
Hi, I try to use your module on a Nvidia Xavier AGX board. The compilation and module loadging go without any error. But when I tried to run the example, I got the "cannot execute on arm64 due to bus error" message. Here is the complete output:
How can I fix this problem. My goal is to use udmabuf with uio in order to perform DMA transfers between the Xavier system memory and a NVMe SSD drive (connected through a M.2 Key M)
Thanks