On Tue, Feb 22, 2022 at 11:07:19PM +0800, Tianyu Lan wrote: > Thanks for your comment. That means we need to expose an > swiotlb_device_init() interface to allocate bounce buffer and initialize > io tlb mem entry. DMA API Current rmem_swiotlb_device_init() only works > for platform with device tree. The new API should be called in the bus > driver or new DMA API. Could you check whether this is a right way before > we start the work. Do these VMs use ACPI? We'd probably really want some kind of higher level configuration and not have the drivers request it themselves.
