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* [iobuf] Ensure I/O buffer data sits within unshared cachelinesMichael Brown2025-07-071-1/+7
| | | | | | | | | | | On platforms where DMA devices are not in the same coherency domain as the CPU cache, we must ensure that DMA I/O buffers do not share cachelines with other data. Align the start and end of I/O buffers to IOB_ZLEN, which is larger than any cacheline size we expect to encounter. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [iobuf] Improve robustness of I/O buffer allocationMichael Brown2016-02-111-0/+136
Guard against various corner cases (such as zero-length buffers, zero alignments, and integer overflow when rounding up allocation lengths and alignments) and ensure that the struct io_buffer is correctly aligned even when the caller requests a non-zero alignment for the I/O buffer itself. Add self-tests to verify that the resulting alignments and lengths are correct for a range of allocations. Signed-off-by: Michael Brown <mcb30@ipxe.org>