> +static dma_addr_t hyperv_map_page(struct device *dev, struct page *page,
> + unsigned long offset, size_t size,
> + enum dma_data_direction dir,
> + unsigned long attrs)
> +{
> + phys_addr_t map, phys
From: Tianyu Lan
Hyper-V Isolation VM requires bounce buffer support. To use swiotlb
bounce buffer, add Hyper-V dma ops and use swiotlb functions in the
map and unmap callback.
Allocate bounce buffer in the Hyper-V code because bounce buffer
needs to be accessed via extra address space(e.g,
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