Hello Linux mailing list ! For porting Linux code to make it work on Xen with AMD-SEV, I need to change the allocation of some pages to use "shared pages" (C-bit cleared) instead of private pages (C-bit set, which is the default kind) as these pages needs to be shared with the hypervisor/Dom0.
Is there a facility to allocate pages with C-bit cleared (and if not running under SEV, just allocate a plain page) ? Current Linux code for SEV seems to only rely on swiotlb as access to shared page is mostly made through DMA-kind devices (e.g virtio or emulated device), but I don't think it is the best approach. Regards Teddy Teddy Astie | Vates XCP-ng Developer XCP-ng & Xen Orchestra - Vates solutions web: https://vates.tech
