On 6/6/22 02:30, John Garry via iommu wrote:
+unsigned long iova_rcache_range(void)
+{
+ return PAGE_SIZE << (IOVA_RANGE_CACHE_MAX_SIZE - 1);
+}
My understanding is that iova cache entries may be smaller than IOVA_RANGE_CACHE_MAX_SIZE and hence that even if code that uses the DMA mapping API respects this limit that a cache miss can still happen.
Thanks, Bart.
