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743b237c3a
In Isolation VM, all shared memory with host needs to mark visible to host via hvcall. vmbus_establish_gpadl() has already done it for storvsc rx/tx ring buffer. The page buffer used by vmbus_sendpacket_ mpb_desc() still needs to be handled. Use DMA API(scsi_dma_map/unmap) to map these memory during sending/receiving packet and return swiotlb bounce buffer dma address. In Isolation VM, swiotlb bounce buffer is marked to be visible to host and the swiotlb force mode is enabled. Set device's dma min align mask to HV_HYP_PAGE_SIZE - 1 in order to keep the original data offset in the bounce buffer. Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com> Reviewed-by: Long Li <longli@microsoft.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20211213071407.314309-5-ltykernel@gmail.com Signed-off-by: Wei Liu <wei.liu@kernel.org>