lkml.org 
[lkml]   [2012]   [Oct]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/4] xen/lowlevel: Implement pvop call for load_idt (sidt).
On 10/18/2012 07:45 AM, Konrad Rzeszutek Wilk wrote:
>>
>> OK... this seems like another excellent set of pvops calls that
>> should be nukable to Kingdom Come. There is no reason, ever, to
>> read the IDT and GDT from the kernel... the kernel already knows
>> what they should be!
>
> Even during suspend and resume cycle? There are the sequence of
> sidt/lidt calls being done there. And we do need to filter at
> least the sidt call - and in the case of ACPI suspend path,
> the lidt.

Yes, I am pretty sure we can make static guarantees on the IDT and GDTs.

-hpa

--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.



\
 
 \ /
  Last update: 2012-10-18 17:41    [W:0.106 / U:0.416 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site