Re: [Xen-devel] [PATCH 2/4] xen/lowlevel: Implement pvop call for load_idt (sidt).

["H. Peter Anvin" <hpa@xxxxxxxxx>]

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.


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