Re: [Xen-devel] [PATCH v2] x86/vmx: Add command line option to enable EPT without PAT

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 17.04.14 at 17:29, <aravindp@xxxxxxxxx> wrote:
>> > --- a/docs/misc/xen-command-line.markdown
>>> +++ b/docs/misc/xen-command-line.markdown
>>> @@ -523,6 +523,20 @@ Either force retrieval of monitor EDID information
>>via
>>> VESA DDC, or
>>>  disable it (edid=no). This option should not normally be required
>>>  except for debugging purposes.
>>>
>>> +### ept\_without\_pat (Intel)
>>> +> `= <boolean>`
>>> +
>>> +> Default: `false`
>>> +
>>> +Allow EPT to be enabled when PAT is not present.
>>
>>This is a little too broad and hence confusing statement: I'm pretty
>>certain PAT (the MSR) gets implemented/emulated by hypervisors.
>>What's needed here (and potentially missing in emulations) is the
>>VMX feature VM_ENTRY_LOAD_GUEST_PAT, and it should be said
>>so.
> 
> OK, I will update the description to reflect that. What should I call the 
> option? ept_without_vmx_pat?

I think I like Kevin's suggestion, e.g. "force-ept".

Jan


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