Re: [Xen-devel] [PATCH 03/16] SUPPORT.md: Add some x86 features

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 21.11.17 at 11:42, <george.dunlap@xxxxxxxxxx> wrote:
> On 11/21/2017 08:09 AM, Jan Beulich wrote:
>>>>> On 13.11.17 at 16:41, <george.dunlap@xxxxxxxxxx> wrote:
>>> +### x86/PVH guest
>>> +
>>> +    Status: Supported
>>> +
>>> +PVH is a next-generation paravirtualized mode 
>>> +designed to take advantage of hardware virtualization support when 
>>> possible.
>>> +During development this was sometimes called HVMLite or PVHv2.
>>> +
>>> +Requires hardware virtualisation support (Intel VMX / AMD SVM)
>> 
>> I think it needs to be said that only DomU is considered supported.
>> Dom0 is perhaps not even experimental at this point, considering
>> the panic() in dom0_construct_pvh().
> 
> Indeed, that's why dom0 PVH isn't in the list, and why this says 'PVH
> guest', and is in the 'Guest Type' section.  We generally don't say,
> "Oh, and we don't have this feature at all".
> 
> If you think it's important we could add a sentence here explicitly
> stating that dom0 PVH isn't supported, but I sort of feel like it isn't
> necessary.

Much depends on whether you think "guest" == "DomU". To me
Dom0 is a guest, too.

Jan


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