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.