[lkml]   [2013]   [Jun]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 4/4] x86, efi: Map runtime services 1:1
On Thu, Jun 06, 2013 at 12:28:20PM -0700, H. Peter Anvin wrote:
> Or we could materialize mappings for this specific PGD. However,
> adding a read of %cr3 in __do_page_fault sounds expensive.

Yes, I think we want to make sure all mappings are there when we do an
EFI runtime call so that we never #PF while it executes.

Matt mentioned on IRC that the it could be that his EFI runtime is
referencing EFI_RESERVED area which we don't map. However, we need to
confirm/disprove that first, as it is currently only a hunch.


Sent from a fat crate under my desk. Formatting is fine.

 \ /
  Last update: 2013-06-06 22:21    [W:0.049 / U:2.516 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site