On Wed, Jun 08, 2022 at 05:55:47PM -0700, Dongli Zhang wrote:
> @@ -109,6 +109,7 @@ struct io_tlb_mem {
> } *slots;
> };
> extern struct io_tlb_mem io_tlb_default_mem;
> +extern struct io_tlb_mem io_tlb_high_mem;
Tis should not be exposed.
> +extern bool swiotlb_high_active(void);
And
Currently, the virtio driver is not able to use 4+ GB memory when the
swiotlb is enforced, e.g., when amd sev is involved.
Fortunately, the SWIOTLB_ANY flag has been introduced since
commit 8ba2ed1be90f ("swiotlb: add a SWIOTLB_ANY flag to lift the low
memory restriction") to allocate swiotlb
