lkml.org 
[lkml]   [2019]   [Jun]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH, RFC 44/62] x86/mm: Set KeyIDs in encrypted VMAs for MKTME
On Wed, May 08, 2019 at 05:44:04PM +0300, Kirill A. Shutemov wrote:
> From: Alison Schofield <alison.schofield@intel.com>
>
> 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?

\
 
 \ /
  Last update: 2019-06-14 13:45    [W:0.262 / U:9.552 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site