Messages in this thread |  | | Date | Thu, 18 Oct 2012 08:02:44 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH 2/4] xen/lowlevel: Implement pvop call for load_idt (sidt). |
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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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