Re: [Xen-devel] [PATCH 1/1 V5] x86/AMD: Fix nested svm crash due to assertion in __virt_to_maddr

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 12.08.13 at 10:57, "Egger, Christoph" <chegger@xxxxxxxxx> wrote:
> On 08.08.13 08:47, Jan Beulich wrote:
>> In any case - explaining how nestedhvm_enabled() could end up
>> returning a value different from hvm_svm_enabled() would help
>> my understanding.
> 
> nestedhvm_enabled() returns true when 'nestedhvm=1' in the
> guest config file.
> 
> hvm_svm_enabled() returns true when the hvm guest enabled SVM
> in EFER.

And the guest should certainly be disallowed to enable SVM in
EFER when nestedhvm was not 1 in the config file. Or am I
missing something here?

Jan


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