Messages in this thread | | | Date | Wed, 13 Feb 2013 14:35:49 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH] x86, kvm: Add MSR_AMD64_BU_CFG2 to the list of ignored MSRs |
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On Wed, Feb 13, 2013 at 02:10:02PM +0200, Gleb Natapov wrote: > > > Is your guest compiled without PV support? With PV Linux traps #GP for > > > all MSRs and it saves us in more than one places. > > > > Yes, CONFIG_PARAVIRT_GUEST is not set on the guest kernel. > > > Thanks. It does not mean that the patch should not be applied though.
Right,
but, come to think of it, adding an MSR each time to those functions could turn out to be a PITA. The PV solution with trapping on the MSR accesses might be better so maybe CONFIG_KVM should do
select KVM_GUEST
?
This is even a good forward-looking solution.
> I cannot seems to find the documentation for the MSR anywhere, do you > have a pointer?
http://support.amd.com/us/Processor_TechDocs/31116.pdf, p.438
Thanks.
-- Regards/Gruss, Boris.
Sent from a fat crate under my desk. Formatting is fine. --
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