On 11/19/21 14:47, Chao Peng wrote:
For fd-based memslot store the file references for shared fd and the private fd (if any) in the memslot structure. Since there is no 'hva' concept we cannot call hva_to_pfn() to get a pfn, instead kvm_memfd_ops is added to get_pfn/put_pfn from the memory backing stores that provide these fds. Signed-off-by: Yu Zhang<yu.c.zhang@xxxxxxxxxxxxxxx> Signed-off-by: Chao Peng<chao.p.peng@xxxxxxxxxxxxxxx> ---
What about kvm_read/write_guest? Maybe the proposal which kept userspace_addr for the shared fd is more doable (it would be great to ultimately remove the mandatory userspace mapping for the shared fd, but I think KVM is not quite ready for that).
Paolo
