[lkml]   [2018]   [Jan]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 10/16] x86/mm/pti: Populate valid user pud entries
On Tue, 16 Jan 2018, Joerg Roedel wrote:

> From: Joerg Roedel <>
> With PAE paging we don't have PGD and P4D levels in the
> page-table, instead the PUD level is the highest one.
> In PAE page-tables at the top-level most bits we usually set
> with _KERNPG_TABLE are reserved, resulting in a #GP when
> they are loaded by the processor.
> Work around this by populating PUD entries in the user
> page-table only with _PAGE_PRESENT set.
> I am pretty sure there is a cleaner way to do this, but
> until I find it use this #ifdef solution.

Stick somehting like


into the 32 and 64 bit variants of some relevant header file



 \ /
  Last update: 2018-01-16 22:06    [W:0.638 / U:2.668 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site