On Wed, May 08, 2019 at 05:44:04PM +0300, Kirill A. Shutemov wrote: > From: Alison Schofield <alison.schofield@xxxxxxxxx> > > MKTME architecture requires the KeyID to be placed in PTE bits 51:46. > To create an encrypted VMA, place the KeyID in the upper bits of > vm_page_prot that matches the position of those PTE bits. > > When the VMA is assigned a KeyID it is always considered a KeyID > change. The VMA is either going from not encrypted to encrypted, > or from encrypted with any KeyID to encrypted with any other KeyID. > To make the change safely, remove the user pages held by the VMA > and unlink the VMA's anonymous chain. This does not look like a transformation that preserves content; is mprotect() still a suitable name?
