28 Nov
2022
28 Nov
'22
6:11 p.m.
On Mon, Nov 28, 2022 at 09:05:48AM +0000, Tian, Kevin wrote:
From: Eric Auger eric.auger@redhat.com Sent: Monday, November 28, 2022 1:49 AM
+struct iommu_ioas_copy {
- __u32 size;
- __u32 flags;
- __u32 dst_ioas_id;
- __u32 src_ioas_id;
is src_ioas_id == dst_ioas_id allowed?
I suppose so. iommufd_ioas_copy() simply gets a reference to underlying iopt_pages according to [src_ioas_id, src_iova] and then map it into [dst_ioas_id, dst_iova]. It doesn’t matter whether iopt_pages comes from a same or different ioas.
The only restriction is that the src/dst ranges don't overlap.
Right
Jason