Re: [Xen-devel] [PATCH 3/3] x86/svm: correct EFER.SVME intercept checks

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 03/02/18 17:03, Boris Ostrovsky wrote:
>
>
> On 01/31/2018 03:35 PM, Brian Woods wrote:
>> Corrects some EFER.SVME checks in intercepts.  See AMD APM vol2 section
>> 15.4 for more details.  VMMCALL isn't checked due to guests needing it
>> to boot.
>>
>
> Don't you need SVME be on for VMMCALL?

In real hardware, yes.

However, it's quite unreasonable to require the guest to have activated
its idea of EFER.SVME before it can make hypercalls :)

~Andrew

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