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Tianyu Lan authored
In Isolation VM, all shared memory with host needs to mark visible to host via hvcall. vmbus_establish_gpadl() has already done it for netvsc rx/tx ring buffer. The page buffer used by vmbus_sendpacket_ pagebuffer() stills need to be handled. Use DMA API to map/umap these memory during sending/receiving packet and Hyper-V swiotlb bounce buffer dma address will be returned. The swiotlb bounce buffer has been masked to be visible to host during boot up. rx/tx ring buffer is allocated via vzalloc() and they need to be mapped into unencrypted address space(above vTOM) before sharing with host and accessing. Add hv_map/unmap_memory() to map/umap rx /tx ring buffer. Signed-off-by:
Tianyu Lan <Tianyu.Lan@microsoft.com> Reviewed-by:
Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by:
Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20211213071407.314309-6-ltykernel@gmail.comSigned-off-by:
Wei Liu <wei.liu@kernel.org>
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